Maintenance services for air and flue gas ducts and metallic expansion joints at tutuka power station (5-Year contract)

Provision of maintenance services for air and flue gas ducts and metallic expansion joints at Tutuka Power Station for a period of 5 years.

Closing date: 19 October 2026 at 10:00 (per tender record).

Document issue date: 04 June 2026.

Eskom representative (quality): Dimpho Mnisi

Returnable documents (Category 1 – Quality Requirements):

• Valid ISO 9001 certificate (Option 1) OR documented evidence of an operational QMS (Option 2) – see evaluation criteria.
• Documented information for roles, responsibilities and authorities (organisation chart and responsibility matrix including quality management function).
• Documented information for control of externally provided processes, products and services (criteria for evaluation, selection, monitoring and re-evaluation of external providers).
• Latest internal management system audit report (with nonconformity, correction and/or corrective action reports).
• Latest certification management system audit report not older than 12 months (with nonconformity, correction and/or corrective action reports).
• Records of management review meetings (minutes, attendance registers).
• Draft Contract/Project Quality Plan specific to the scope of work (per ISO 10005).
• Draft/example of an Inspection and Test Plan (ITP) or Quality Control Plan (QCP) on similar or previous work.
• Form A completed and signed.
• Any other requirements as per the scope of work and/or specification.

Quality requirements are evaluated as Category 1 deliverables with an indicator of 1 (i.e. mandatory). Bidders must either:

• Option 1: Hold a valid ISO 9001 certificate issued by an accredited body, with scope relevant to the work, from a certification authority with recognised international accreditation, and valid at expiry date.
• Option 2: Demonstrate an operational QMS meeting the specified clauses.

Scoring sections (each item scores 1 if compliant):

• Section A (Option 1): ISO 9001 certificate – scope relevance, accredited authority, international accreditation, validity – max 4.
• Section B: Evidence of QMS in operation – documented information for roles/responsibilities, control of external providers, internal audit report, certification audit report (≤12 months), management review records – max 5.
• Section C: Draft Contract/Project Quality Plan – max 1.
• Section D: Draft/example ITP or QCP – max 1.
• Section E: Form A completed and signed, plus other requirements – max 2.

Total possible score: 13 (Option 1) or 9 (Option 2, without Section A).

Form A must be completed and signed. Additional quality requirements as per the scope of work and/or specification may be listed and evaluated.

No specific compliance requirements beyond the quality management system requirements listed in the returnable documents.

Quality requirements are evaluated as Category 1 deliverables with an indicator of 1 (mandatory). Bidders must either hold a valid ISO 9001 certificate (Option 1) or demonstrate an operational QMS (Option 2). Scoring sections: A (ISO 9001 certificate, max 4), B (QMS evidence, max 5), C (Draft Contract Quality Plan, max 1), D (Draft ITP/QCP, max 1), E (Form A and other requirements, max 2). Total possible score: 13 (Option 1) or 9 (Option 2).

The air and flue gas ducts at Tutuka Power Station erode during operation. Flue gas ducts from the flue gas hoods to the precipitator inlet ducts suffer erosion of walls/casings, stays/bracings, turning vanes, dampers, and associated protection channels/angle irons, cover plates, and expansion joint sleeves/covers. Air duct walls erode around control air dampers, especially hot air recirculating and secondary air dampers. Metallic expansion joints are subject to cracking, corrosion, and erosion when sleeves are eroded. Access doors leak under pressure or allow air ingress under suction.

Consequences of duct failure include:

• Eroded damper sealing surfaces cause dampers to pass, leading to secondary air leaks, FD and PA fans running out of capacity, high motor currents, and mill load losses.
• Holes in flue gas ducts cause air ingress, ID fans running out of capacity, positive furnace pressure, and load losses.
• Eroded turning vanes fail to direct flue gas, causing high velocities and accelerated erosion.
• Eroded damper blades fail to stop flue gas flow when a draught group is out of service.
• Eroded stays/bracings fail to keep ducts rigid; fallen bracings can get stuck in air heaters, requiring unit shutdown.

The scope covers maintenance of boiler air and flue gas ducts, including casings/walls, turning vanes, dampers, bracings, protection channels/angle irons, covers, metallic compensators, and metallic expansion joints during IN, IR, and GO outages at Tutuka Power Station. The flue gas ducts run from boiler flue gas hoods to smokestacks; air ducts run from FD fan suctions to secondary air dampers and to hot air mills for primary air.

Applicability: All units 1-6 at Tutuka Power Station.

Normative references: 15ENG STR 001 (Draught Plant Maintenance Execution Strategy) and 240-56241933 (Standard for Welding Requirements on Eskom Plants). Informative reference: ISO 9001.

Roles: Boiler Plant Engineering compiles scope and issues repair instructions; Outage coordinator issues scope to service provider, reserves spares, and orders non-stock items.

Monitoring: Inspection reports and repair/cutting instructions are used to monitor duct repairs.

Mandatory accreditation and approvals:

• The company must be accredited to SANS 3834 Part 3 at minimum.
• All welding must follow the Standard for Welding Requirements on Eskom Plants (240-56241933).
• Welding procedures must be approved by Eskom and the Third-Party Inspection Authority before any welding starts.
• All welders and welding supervisors must be ISO and/or IIW qualified; their CVs and qualifications must be submitted for approval by Eskom and the Third-Party Inspection Authority before welding starts.
• All work must be done according to approved Inspection and Test Plans (ITPs) and Quality Control Plans (QCPs).
• ITPs/QCPs must be submitted and approved before work commences.
• All hold points and witness points in the ITPs/QCPs must be adhered to.
• All new materials supplied by the contractor must be delivered with material certificates.

Scope of work:

• Maintenance of boiler air and flue gas ducts, including casings/walls, turning vanes, dampers, bracings, associated protection channels/angle irons, covers, metallic compensators, and metallic expansion joints.
• Applies to all six units (1-6) at Tutuka Power Station.
• Work is performed during Inspection (IN), Interim Repair (IR), and General Overhaul (GO) outages.
• The flue gas ducts run from the boiler flue gas hoods to the smokestacks; the air ducts run from the FD fan suctions to the secondary air dampers and to the hot air mills for primary air.
• Ducts are fabricated from 6mm mild steel, either circular or rectangular, with internal bracings.
• Flue gas ducts are subject to fly ash erosion, most severely between the economizer outlet and the electrostatic precipitators.
• Air ducts see little erosion except around control damper sealing surfaces.

Typical repair activities (quantities in Appendix A):

• Opening and closing access doors for inspection and repairs.
• Window patching of eroded duct walls, turning vanes, and baffle plates (cutting, weld preparation, installation, welding).
• Weld build-up of grooved areas of duct walls.
• Repair or replacement of flue gas damper blades, bottom support structures, pillars, and guide stub shafts.
• Installation of protective sleeves on damper blade shafts.
• Fabrication of new damper blades, turning vanes, access doors, and stay pipes.
• Replacement of eroded stays, bracings, gussets, cover plates, and protecting channels/angle irons/flat bars.
• Repair of expansion joints by installing inserts; cleaning ash from expansion joint convolutions.
• Replacement of access door seals and dog brackets.
• Repair or replacement of cat ladder rungs and protecting plates.
• Repair of oxygen probe support channels and saddles.

Outage coverage:

• IR outage: from air heater flue gas inlet ducts (slopes) to smokestack (excluding ID fans), from FD fan suctions to secondary air dampers (excluding FD fans and air heater air hoods), and from PA fan suction take-off to hot air to mill PA dampers (excluding PA fans).
• GO outage: from flue gas hoods to smokestack (excluding ID fans), from FD fan suctions to secondary air dampers (excluding FD fans and air heater air hoods), and from PA fan suction take-off to hot air to mill PA dampers (excluding PA fans).
• IN outage: as and when required for specific areas.
• Welding around secondary air and core air dampers is excluded (covered under PF burners scope).

Materials and scaffolding:

• Material (plates, channels, angle irons, flat bars) is supplied free of charge by Eskom.
• Standard 6mm plate sizes (per Appendix A) should be used where possible.
• Eskom provides all scaffolding; requirements must be given to the Contract Manager two weeks before the outage.

Method statement:

• Work is issued based on inspection reports and repair instructions.
• Steps: cut out damaged areas, prepare weld edges to 30°, fit and tack weld, notify inspector for fit-up check, weld per approved procedures, clean welds for NDT and inform inspector.

Brief method statement:

• The scope of work/repair instruction is issued to the repair partner based on inspection reports by the inspection partner (initial scope), including work identified during repairs.
• Steps:

1. Cut out erosion/corrosion damaged areas as per inspection reports and repair instructions.
2. Prepare for welding (grinding) of inserts and areas to be welded to 30°.
3. Fit and tack weld components/inserts into position; notify inspector to check fit-up per QCPs/ITPs.
4. Weld components/inserts according to approved welding procedures per QCPs.
5. Clean new welds for NDT and inform inspector of welds to be tested.

Quality requirements:

• The contractor must submit ITPs/QCPs before any work may commence.
• All ITPs/QCPs must be approved by Eskom and the Third-Party Inspection Authority.
• All work must be done according to approved ITPs/QCPs; all hold points and witness points must be adhered to.
• All new materials supplied by the contractor must be delivered with material certificates.

Welding requirements:

• Company must be accredited to SANS 3834 Part 3 at minimum.
• All welding must follow the Standard for Welding Requirements on Eskom Plants (240-56241933).
• Welding must be done according to approved EN BS ISO welding procedures; submit procedures for approval by Eskom and the Third-Party Inspection Authority before starting.
• All welders and welding supervisors must be ISO and/or IIW qualified; submit CVs and qualifications for approval before starting.
• All welding must be done per approved ITPs.

Data book (delivered to Eskom on completion) must include:

• Approved scope of work
• Approved repair instructions/recommendations
• Approved and signed-off QCPs
• Welding procedures and welder qualification records
• Material and electrode certificates
• Updated drawing (can be used as weld map)
• NDT reports
• Final release certificate/certificate of completion (COC)
• Any other relevant information

Ndt:

• Eskom is responsible for all NDT.
• Inspection and NDT will be carried out by Eskom partner.
• Contractor must request NDT per approved ITP at least 24 hours in advance, in writing.
• Daily requests discussed at daily feedback meeting; hand over NDT requests to Eskom in writing.

Closing date: 19 October 2026 at 10:00

Clarification meeting (non-compulsory): 05 October 2026 at 10:00 via MS Teams

• Link: https://teams.microsoft.com/meet/387234314610922?p=B7hhot4tAgM1axJ9GH
• For permit access, email full name, ID, car registration, and company name to [email protected]

Clarification queries deadline: 5 working days before the tender closing date.

Tender validity period: 120 days from closing date.

Eskom Representative (SCM contact):

• Name: Tembakazi Kwakweni
• Email: [email protected]

Fraud and corruption reporting:

• Telephone: 0900 11 2722
• Email: [email protected]

All queries and clarifications must be addressed in writing to the Eskom Representative.

Submission method: electronic only, via the Eskom E-tendering site (Eskom Tender Bulletin). No hard copies accepted.

• Upload documents under the folders Technical, Commercial, Financial, and Other.
• All documents must be in PDF format; the price list must be submitted in PDF and a copy in Excel format.
• Upload size per document: 500 MB; total submission: 4 GB.
• No zip or compressed files allowed.
• If resubmitting, the latest version is accepted; previous submissions become null and void.
• Ensure the submission status is marked as complete.
• Late tenders will not be accepted.

Returnable forms (disqualifiable if not submitted at closing):

• Annexure A (Authorisation Form): confirms the signatory is authorised to bind the bidder.
• Annexure B (Acknowledgement Form): acknowledges Eskom's SHE rules and requirements.
• Annexure C (Tenderer's Particulars): bidder identification details.
• Annexure D (Integrity Declaration Form): commits to the Supplier Integrity Pact.
• Annexure E (CPA Requirements for Local Goods/Services): declaration for local content.
• Annexure F (CPA(IG) for Foreign Goods/Services): only if applicable.
• Annexure G1-G4 (SBD 6.2 and local content declarations): evidence of local production and content.
• Annexure H (SBD 1 Invitation to Bid): completed and submitted by all tenderers.
• Annexure J (SBD 4 Bidders Disclosure): discloses any state employment or connections.

Returnable forms (non-disqualifiable, but must be submitted within 5 working days if requested):

• Tax Clearance Certificate (if not on CSD or no SARS PIN provided).
• Tax Evaluation Questionnaire (if applicable).
• Proof of Employment Equity Act compliance (for designated employers).
• CIDB grading proof (within 21 working days from closing).
• NEC Term Service Contract (completed in full).
• Pricing schedule (PDF and Excel).

Returnable forms (for evaluation, score zero if not submitted):

• Annexure I (SBD 6.1 Preference Points Claim Form).

Returnable forms (prior to contract award):

• Proof of CSD registration.
• CIDB 5ME or higher.
• Safety documents: COIDA certificate, Annexure B, baseline OHS risk assessment, SHE plan, OHS costing, letter of good standing, OHS policy, SHE competency evidence.
• Quality documents: ISO 9001 certification or QMS evidence, quality method statement, quality policy, quality objectives, organisation chart, documented information for control of externally provided processes, Form A.
• Environmental documents: Annexure B, Environmental Management Plan, environmental aspects and impacts identification, environmental policy.
• Due diligence financial statements (annual financial statements, public interest score).
• JV documents if applicable: letter of intent, JV agreement, confirmation of single business entity, single designated bank account.
• Additional documents (ECSA/SACPCMP/CVs/permits/licenses) if applicable.

Disqualification risks:

• Missing or unsigned disqualifiable returnables.
• Late submission.
• Submitting more than one tender (except e-tendering size limits).
• Conflict of interest.
• Tender signed by non-authorised person.
• Being on National Treasury restricted list or Tender Defaulters list.
• Subcontracting 100% of the scope.

Tender returnables required at closing (disqualifiable): Annexure A Authorization Form, Annexure B Acknowledgement Form, Annexure C Tenderers Particulars, Annexure D Integrity Pact Declaration form, Annexure E CPA for local goods/services (if applicable), Annexure F CPA(IG) for imported goods/services (if applicable), Annexure G1-G4 SBD 6.2 Declaration certificate for local production and content, Annexure H SBD 1, Annexure J SBD 4 Bidders Disclosure. Returnables required at closing (non-disqualifiable): Tax Clearance Certificate, Tax Evaluation Questionnaire (if applicable), Compliance with Employment Equity Act proof, CIDB grading proof (within 21 working days), NEC or other contract (NECTSC), Pricing schedule (PDF and Excel). Returnables required at closing for evaluation: Annexure I SBD 6.1 Preference Points Claim Form. Returnables required prior to award: Mandatory contractual requirements (CSD registration, CIDB 5ME or higher), Safety documents (COIDA, Annexure B, baseline OHS risk assessment, SHE Plan, OHS costing, letter of good standing, OHS policy, SHE competency), Quality documents (ISO 9001 certification or QMS evidence, quality method statement, quality policy, quality objectives, organization chart, documented information for control of externally provided processes, Form A), Environmental documents (Annexure B, Environmental Management Plan, environmental aspects and impacts identification, environmental policy), Due diligence financial statements (annual financial statements, public interest score). Additional documents for JV: letter of intent, JV agreement, confirmation of single business entity, single designated bank account. Additional documents required (ECSA/SACPCMP/CVs/permits/licenses) if applicable.

Evaluation stages:

1. Mandatory compliance: eligibility criteria, complete tender, mandatory returnables, CIDB 5ME or higher.
2. Functionality evaluation (minimum threshold 70%):

• Compliance to Standard for Welding requirements on Eskom Plant 240-106628253: 30%
• Verifiable reference list of similar work (repair of ducts or fabrication) within Eskom and/or any other industry in the last 5 years: 20%
• Experience and qualifications of company staff for maintenance work done for Eskom Power Plant and/or any other industry: 20%
• List of welders qualified to WPS as provided in the mandatory Technical Evaluation Criteria: 10%
• Submit general inspection test plans (ITPs) for window patch, stay pipe, protecting channel, multi-convoluted metallic expansion joint and gusset repairs and for weld build up (5 ITPs): 20%
• Tenderers scoring below 70% on functionality are disqualified.

3. Price evaluation (90 points):

• Prices evaluated inclusive of VAT, corrected for arithmetical errors, excluding contingencies, adjusted for variations, and compared on Net Present Value basis.
• Unconditional discounts considered; conditional discounts applied at payment.

4. Specific goals (10 points) under PPPFA 90/10 system.

• Failure to submit evidence for a specific goal results in 0 points for that goal, but not disqualification.

5. Ranking: total of price and specific goals scores, highest ranked.

Preference point system: 90/10 (price 90, specific goals 10).

Objective criteria: not applicable.

Reverse e-auction: not applicable.

Scope: Provision of maintenance services for air and flue gas ducts and metallic expansion joints at Tutuka Power Station.

Contract period: 5 years.

Key technical requirements:

• Compliance to Standard for Welding requirements on Eskom Plant 240-106628253.
• Accreditation to ISO 3834 Part 3 (Parts 1 and 2 accepted).
• Qualified Welding Procedure Specification (WPS) for 15Mo3 plate up to 20mm and pipes up to 300mm diameter.
• Submit general inspection test plans (ITPs) for window patch, stay pipe, protecting channel, multi-convoluted metallic expansion joint, gusset repairs, and weld build up (5 ITPs).
• Provide a list of welders qualified to WPS as per the mandatory Technical Evaluation Criteria.

Quality requirements:

• Conform to QM58 – Supplier Quality Management Specification and ISO 9001:2015.
• Provide quality returnables per Cat 1 (or Cat 4 if not certified).
• Submit a draft Contract Quality Plan specific to the scope (Ref ISO 10005).
• Submit Quality Control Plans/Checklists/ITPs as per scope.
• Provide evidence of QMS in operation: internal audit report, certification audit report not older than 12 months, management review records.
• Form A completed and signed.

Mandatory Technical Evaluation Criteria:

• Compliance to Standard for Welding requirements on Eskom Plant 240-106628253.
• Accreditation to ISO 3834 Part 3 (Parts 1 and 2 accepted): 5 points for certificate, 2 for letter from assessment service provider, 0 for none.
• Qualified Welding Procedure Specification (WPS) for 15Mo3 plate up to 20mm and pipes up to 300mm diameter: 5 points for both plate and pipe certificates, 4 for plate only, 2 for pipe only, 0 for none.
• Submit general inspection test plans (ITPs) for window patch, stay pipe, protecting channel, multi-convoluted metallic expansion joint, gusset repairs, and weld build up (5 ITPs).

Functionality criteria include:

• Verifiable reference list of similar work (repair of ducts or fabrication) within Eskom and/or any other industry in the last 5 years.
• Experience and qualifications of company staff for maintenance work done for Eskom Power Plant and/or any other industry.
• List of welders qualified to WPS as provided in the mandatory Technical Evaluation Criteria.
• Sub-criteria for staff experience: supervisors with 2 years of experience (4 points), 1 year (2 points), 0 years (0 points).
• Artisan/technician experience: list with 4 different disciplines (5 points), 3 disciplines (4 points), 2 disciplines (2 points), no list (0 points).
• Welders: list with at least 5 welders (5 points), 4 welders (4 points), 3 or less (2 points), no list (0 points).

Quality requirements:

• Conform to QM58 – Supplier Quality Management Specification and ISO 9001:2015.
• Provide quality returnables per Cat 1 (if certified) or Cat 4 (if not certified).
• Section A: Valid ISO 9001 certification by an accredited body, with defined scope and validity.
• Section B: Evidence of QMS in operation: documented information for control of externally provided processes, internal audit report, certification audit report not older than 12 months, management review records.
• Section C: Draft Contract Quality Plan specific to scope (Ref ISO 10005).
• Section D: Quality Control Plans/Checklists/ITPs as per scope.
• Section E: Form A completed and signed.
• If not certified, provide quality method statement, quality policy, quality objectives approved by top management, organisation chart and responsibility matrix.

Pricing schedule/BOQ must be submitted in PDF and Excel format.

Upload size per document: 500 MB; total submission: 4 GB.

Prices evaluated inclusive of VAT, corrected for arithmetical errors, excluding contingencies, adjusted for variations, NPV comparison.

Unconditional discounts considered; conditional discounts applied at payment.

Prices scored out of 90 points.

Cataloguing line item must be included if required.

Pricing format: Pricing Schedule/BOQ, submitted in PDF and Excel format.

Upload size per document: 500 MB; total submission: 4 GB.

Price evaluation:

• Prices evaluated inclusive of VAT.
• Corrected for arithmetical errors.
• Excluding contingencies in any bill of quantities or activity schedule.
• Adjusted for variations, deviations, or alternative tenders.
• Compared on Net Present Value basis.
• Unconditional discounts considered; conditional discounts applied at payment.

Payment terms:

• Contracts below R50 million (incl. VAT): payment within 30 days of receipt of undisputed invoices.
• Contracts above R50 million (incl. VAT): payment within 60 days of receipt of undisputed invoices.

Security for performance:

• If a performance bond or demand guarantee is required, the tenderer must select at least two financial institutions from the list of Eskom-approved banks.

Cataloguing:

• Successful tenderer may be required to provide cataloguing information per item; pricing schedule must include a line item for cataloguing if required.

Mandatory eligibility:

• CIDB grading: 5ME or higher.
• Proof of CSD registration.
• Not under any restriction to do business with Eskom or State-Owned Companies.
• Not on National Treasury restricted list or Tender Defaulters list.
• No conflict of interest.
• Tender signed by authorised person.
• Must not subcontract 100% of the scope.

Tax compliance:

• Local tenderers must provide SARS e-filing PIN or CSD number for verification; otherwise submit a certified copy of tax clearance certificate.
• Foreign tenderers with a footprint in South Africa must provide tax clearance if not on CSD.
• Foreign suppliers with no footprint in South Africa: no proof of tax compliance required.

B-bbee:

• Proof of B-BBEE status level contributor required for preference points (SBD 6.1).
• Acceptable evidence: B-BBEE certificate issued by authorised body, or sworn affidavit as per B-BBEE Codes of Good Practice.

Employment Equity:

• Designated employers must provide proof of compliance with the Employment Equity Act, including proof of submission of EE report to the Department of Labour.

Safety (prior to award):

• COIDA certificate of good standing or proof of application (South African tenderers only).
• Annexure B (acknowledgement of Eskom OHS legal and other requirements).
• Baseline OHS risk assessment with methodology.
• SHE plan addressing scope of work risks.
• OHS costing (detailed breakdown, not lump sum).
• Valid letter of good standing (LOGs).
• OHS policy signed by CEO, compliant to OHS Act Section 7.
• Proof of OHS competency (medical fitness, risk-based PPE, OHS training).

Environmental (prior to award):

• Annexure B signed.
• Environmental Management Plan addressing waste management, incident management, emergency planning, compliance approach, competency/training.
• For medium and high risk: identification of environmental aspects and impacts with methodology.
• Environmental (or SHE/SHEQ) policy signed by Company Owner/CEO/MD.

Financial viability (prior to award):

• Latest approved annual financial statements (no drafts or management accounts), including signed director's report, auditor's/reviewer's/compiler's report, statement of financial position, comprehensive income, changes in equity, cash flows, notes.
• Signed public interest score (for South African entities not audited).

Safety requirements (prior to contract award):

• Annexure B (acknowledgement of Eskom OHS legal and other requirements).
• Health and Safety plan/OHS manual addressing scope of work risks.
• H&S costing (detailed breakdown, not lump sum).
• Baseline OHS risk assessment with methodology.
• Valid letter of good standing (LOGs).
• OHS policy signed by CEO, compliant to OHS Act Section 7.
• Proof of OHS competency: medical fitness assessments, risk-based PPE, OHS training (SHE representative, First aid, HIRA, incident investigation).
• COIDA certificate of good standing or proof of application (South African tenderers only).
• SHEQ file must be approved before work commences.

Environmental requirements (prior to contract award):

• Annexure B (acknowledgement of Eskom's SHE rules and requirements) signed.
• Environmental Management Plan for scope addressing: waste management (reduction, re-use, recycling, disposal), environmental incident management, emergency planning, compliance approach, environmental competency and training.
• For medium and high risk: identification of environmental aspects and impacts, with methodology.
• Environmental (or SHE/SHEQ) policy signed by Company Owner/CEO/MD, committing to environmental compliance and duty of care.

Contract type: NEC Term Service Contract.

Contract period: 5 years.

Contract Skills Development Goals (CSDG): 0.25%.

Payment terms: 30 days for contracts below R50 million (incl. VAT); 60 days for contracts above R50 million (incl. VAT).

Eskom reserves the right to negotiate with preferred bidders if tendered prices are not market-related.

Main contractors are discouraged from subcontracting with subsidiaries; if doing so, must declare in tender.

Security for performance: if required, tenderer must select at least two financial institutions from Eskom-approved list.

Cataloguing: successful tenderer may be required to provide cataloguing information; pricing schedule must include a line item for cataloguing.

SHE, quality and environmental provisions become contractual; SHEQ file must be approved before work commences.

Contractual requirements: Mandatory: Proof of CSD registration, CIDB 5ME or higher. Additional: SHEQ requirements, financial viability (financial statements). SHE, Quality and Environmental provisions will be made contractual. Suppliers given one opportunity to submit outstanding documents within 7 working days. SHEQ file must be approved before work commences. Contractual requirements are not evaluation criteria; assessed after evaluation and ranking. Proof must be submitted prior to contract award. Contract conditions: NEC Term Service Contract. CIDB Requirements: 5ME or Higher. Contract Skills Development Goals: 0.25%. Payment terms: 30 days for contracts below R50 million, 60 days for above R50 million. Eskom reserves right to negotiate with preferred bidders. Main contractors discouraged from subcontracting with subsidiaries; must declare if doing so.

Eligibility criteria: Tenderers must not be under any restriction to do business with Eskom or State-Owned Companies. Ineligible if: nationality of a country on international sanctions list; submitting more than one tender (except e-tendering size limits); JV/consortium agreement lacking joint and several liability; conflict of interest; tender signed by non-authorised persons; restricted by National Treasury; on Tender Defaulters list; restricted by Eskom; sub-contracting 100% of scope. Basic compliance requires: meet eligibility, submit complete tender, submit mandatory commercial returnables, CIDB 5ME or higher.

Functionality requirements applicable with criteria: Compliance to Standard for Welding requirements on Eskom Plant 240-106628253 (30%), Verifiable reference list of similar work (repair of ducts or fabrication) within Eskom and/or any other industry in last 5 years (20%), Experience and qualifications of Company staff for maintenance work done for Eskom Power Plant and/or any other industry (20%), List of welders qualified to WPS as provided in mandatory Technical Evaluation Criteria (10%), Submit general inspection test plans (ITPs) for window patch, stay pipe, protecting channel, multi-convoluted metallic expansion joint and gusset repairs and for weld build up (20%). Tenderers not meeting 70% functionality threshold will be disqualified. Prices scored out of 90 points, specific goals scored out of 10 points, using 90/10 preferential point system. Prices evaluated inclusive of VAT, corrected for arithmetical errors, excluding contingencies, adjusted for variations, NPV comparison, unconditional discounts considered. Objective criteria not applicable. Reverse e-auction not applicable.

The supplier must acknowledge understanding of and compliance with the Eskom OHS legal and other requirements by signing the Acknowledgement Form (Annexure B). The supplier must be able to demonstrate compliance with the listed OHS standards and regulations. The main supplier is accountable for the OHS compliance of its subcontractors and must provide grounds for termination of subcontractor work if required.

The supplier/contractor/tenderer must comply with the following OHS documents when working at or rendering a service to Eskom:

• Eskom contractor Health and Safety requirements standards 32-726
• OHS specification/requirements provided
• Occupational Health and Safety Act and Regulations
• Compensation for Occupational Diseases and Illnesses Act
• Plant Safety Regulations
• Work at Height Standard 32-418

After contract award, the supplier is responsible for fully aligning company processes to Eskom's OHS requirements (policies, procedures, standards).

Penalties will be enforced on the main supplier for non-conformance to Eskom and/or statutory OHS requirements (identified for the main supplier and/or its contractor and/or supplier).

All employees (contractors/suppliers) must undergo the relevant Eskom induction and the company's induction.

The main contractor/supplier must:

• Demonstrate to Eskom the process and selection criteria applied when appointing contractors and suppliers.
• Provide notification to Eskom prior to the appointment of contractors or suppliers for the commencement of work.
• Ensure that contractors/suppliers have adequate resources and competencies.
• Be accountable for the management of its contractors/suppliers to ensure compliance with applicable legal and Eskom requirements during contract execution.
• Monitor contractors or suppliers through audits and assessments with regard to OHS compliance during the execution of the work.
• Provide grounds for the termination of work done by contractors/suppliers.
• Deal with all non-conformances/non-compliance by contractors/suppliers (all tiers) directly with the main contractor/supplier in terms of performance and penalty processes.

Eskom reserves the right to verify this when deemed necessary. The contractor may be instructed to provide copies of testimonials/references and the contact details of clients (including Eskom) for whom the Company has done previous work of a similar nature.

The Acknowledgement Form (Annexure B) must be signed by an authorised person (CEO/Director/Managing Director) and witnessed by two witnesses.

The supplier/contractor/tenderer must comply with the following OHS documents when working at or rendering a service to Eskom:

• Eskom contractor Health and Safety requirements standards 32-726
• OHS specification/requirements provided
• Occupational Health and Safety Act and Regulations
• Compensation for Occupational Diseases and Illnesses Act
• Plant Safety Regulations
• Work at Height Standard 32-418

After contract award, the supplier is responsible for fully aligning company processes to Eskom's OHS requirements (policies, procedures, standards).

Penalties will be enforced on the main supplier for non-conformance to Eskom and/or statutory OHS requirements (identified for the main supplier and/or its contractor and/or supplier).

All employees (contractors/suppliers) must undergo the relevant Eskom induction and the company's induction.

The main contractor/supplier must:

• Demonstrate to Eskom the process and selection criteria applied when appointing contractors and suppliers.
• Provide notification to Eskom prior to the appointment of contractors or suppliers for the commencement of work.
• Ensure that contractors/suppliers have adequate resources and competencies.
• Be accountable for the management of its contractors/suppliers to ensure compliance with applicable legal and Eskom requirements during contract execution.
• Monitor contractors or suppliers through audits and assessments with regard to OHS compliance during the execution of the work.
• Provide grounds for the termination of work done by contractors/suppliers.
• Deal with all non-conformances/non-compliance by contractors/suppliers (all tiers) directly with the main contractor/supplier in terms of performance and penalty processes.

Eskom reserves the right to verify this when deemed necessary. The contractor may be instructed to provide copies of testimonials/references and the contact details of clients (including Eskom) for whom the Company has done previous work of a similar nature.

Contact: Tembakazi Kwakweni

Role: Procurement Officer

Supporting documents must be organised into clearly labelled folders:

• Technical folder: CVs and relevant certificates of compliance.
• Financial folder: financials, IT34, public interest score, NEC, etc.
• Commercial folder: invitation to tender and supporting documents.
• SHEQ folder: safety, environmental and quality documents (may be combined or separate).

Each folder must contain only the relevant information.

Bidders must submit a valid BBBEE affidavit or certificate, COIDA registration, SARS Tax PIN, CIPC registration, a bank letter, current and previous year financials, IT34, public interest score, company profile, CSD report, and IDs of directors. These are mandatory supporting documents.

Technical folder must include CVs and relevant certificates of compliance.

Mandatory supporting documents:

• BBBEE affidavit or certificate
• COIDA registration
• SARS Tax PIN
• CIPC registration
• Bank letter
• Financials (current and previous year)
• It34
• Public interest score
• Company profile
• CSD report
• IDs of directors

SHEQ documents (safety, environmental and quality) must be submitted, either combined or in separate folders.

Public interest score must be submitted as part of the financial folder.

Closing date: 19 October 2026 at 10:00 (from tender record).

No briefing or site visit dates are stated in the document.

Buyer: Tembakazi Kwakweni

Business Unit: Tutuka Power Station

No email, telephone, or address provided in the document.

Returnable documents:

• SBD 6.2 (Declaration for Local Production and Content) and Annex C (Local Content Declaration – Summary Schedule) are returnable if applicable.
• Proof of ownership/shareholding (preferably CIPC documentation) inclusive of shareholding breakdown.
• Certified ID copies of shareholders.
• Proof of disability (where applicable).
• For trusts, consortia or joint ventures, a consolidated B-BBEE status level verification certificate.
• Valid B-BBEE certificate (SANAS accredited) or sworn affidavit/CIPS affidavit.
• B-BBEE Improvement or Retention Plan must be submitted within 30 days of signing the contract.
• SDL&I Implementation Schedule must be completed and returned to the SDL&I representative for acceptance within 28 days after contract award.

Disqualification risks:

• Failure to meet the CIDB Construction Skills Development Goal (CSDG) of 0.25% renders the tender non-responsive.
• Failure to meet SDL&I obligations attracts a penalty of 2.5% of contract value and retention of 2.5% of every invoice (excluding VAT) until obligations are fulfilled.

Evaluation is under the 90/10 preference point system.

• Price: maximum 90 points.
• Specific goals (B-BBEE status level): maximum 10 points.
• B-BBEE points allocation (90/10 system): Level 1 = 10, Level 2 = 9, Level 3 = 6, Level 4 = 5, Level 5 = 4, Level 6 = 3, Level 7 = 2, Level 8 = 1, Non-compliant = 0.
• Contract awarded to the tenderer scoring the highest total points (price + specific goals), rounded to two decimal places.
• Tenderers failing to provide documentation for preference points are not disqualified but may only score out of 90 for price and 0 for specific goals.
• Objective criteria (designated sectors, CIDB skills development) are conditions for contract award; failure may lead to the second-ranked tenderer being recommended for award.

Scope: Provision of maintenance services for air and flue gas ducts and metallic expansion joints at Tutuka Power Station.

Duration: 5 years.

Location: Tutuka Power Station, Mpumalanga.

SDL&I objectives (commitments become contractual obligations):

• Local procurement content: Eskom target 100%.
• Procurement from black-owned enterprises (minimum 51% black ownership): Eskom target 10%.
• Jobs: submit proposals for type and number of jobs created and retained in South Africa.
• Skills development: submit proposals for developing skills of unemployed candidates. Required learners:
• 3 Mechanical Technicians (S1 or S2, National Diploma Mechanical)
• 3 Welders (N3 or equivalent, Trade Test Certificate)
• 2 Riggers (N3 or equivalent, Trade Test Certificate)
• Total 10 learners.
• Tenderers bear full cost; Eskom makes no financial contribution.

Skills development methodology: Tenderers must participate directly and through their supply network in developing skills. SETA-accredited training providers may be approached to participate. Skills development targets exclude Eskom employees and registered learners. Tenderers bear full cost; Eskom makes no financial contribution. Tenderers are advised to approach relevant SETAs for grants, subsidies, and incentives, and SARS for tax rebates earmarked for skills development initiatives.

Pricing: Tender response must be separated into components as per the Price Schedule included with the tender documents. Local procurement content is total spending minus the imported component.

SDL&I penalty and performance security:

• Penalty of 2.5% of contract value for failure to meet SDL&I obligations.
• Eskom retains 2.5% of every invoice (excluding VAT) as security for SDL&I obligations, released only upon full fulfilment.

NIPP: Applicable for contracts with foreign content of USD 5 million or more. Winning bidder must negotiate and enter into a NIPP obligation agreement with the dtic before signing the contract with Eskom.

B-bbee:

• Valid B-BBEE certificate (SANAS accredited) or sworn affidavit/CIPS affidavit is a condition for contract award.
• Revenue up to R10 million (EME): may submit a sworn affidavit.
• Revenue up to R50 million (QSE): must comply with all elements of the QSE scorecard relevant to the sector, unless at least 51% black-owned, in which case a sworn affidavit is required.
• Revenue above R50 million: must submit a valid B-BBEE certificate.
• B-BBEE improvement or retention plan must be submitted within 30 days of contract signing.
• Level 4 bidders must achieve Level 3 by end of first year of contract.
• Level 5 to 8 or non-compliant bidders must achieve Level 4 by end of first year, then improve one level each subsequent year.

CIDB:

• Compulsory training required; Construction Skills Development Goal (CSDG) is 0.25%. Failure to meet this mandatory % renders the tender non-responsive.

Designated sectors:

• This commodity is not a designated sector; SBD 6.2 and Annex C are returnable if applicable.

Sworn affidavit validity requirements:

• Must include deponent's name as per ID, identity number, designation (director/owner/member), enterprise name and address, percentage of black ownership and designated group, total revenue and basis, financial year end, B-BBEE status level, empowering supplier status.
• Deponent and Commissioner of Oaths must sign on the same date.
• Commissioner of Oaths cannot be an employee or ex officio of the enterprise.

Specific goals: maximum 10 points for B-BBEE status level under 90/10 system (Level 1: 10, Level 2: 9, Level 3: 6, Level 4: 5, Level 5: 4, Level 6: 3, Level 7: 2, Level 8: 1, non-compliant: 0). Documents required to claim preference points: valid B-BBEE certificate from SANAS accredited agency or sworn affidavit/CIPS affidavit, proof of ownership/shareholding (CIPC), certified ID copies of shareholders, proof of disability where applicable, and consolidated B-BBEE certificate for trusts/consortia/JVs. Tenderers failing to provide documentation may only score out of 90 for price and 0 for specific goals.

SDL&I objectives: Transformation - B-BBEE improvement or retention plan. Tenderers must submit a B-BBEE improvement or retention plan within 30 days of contract signing. Level 4 tenderers must achieve Level 3 by end of first year; Level 5-8 or non-compliant must achieve Level 4 by end of first year and improve one level each subsequent year. Valid B-BBEE certificate or sworn affidavit is a condition for contract award.

Local procurement content: refers to value added in South Africa; tenderers must submit proposals in the provided table. Eskom target is 100%.

Procurement spend on entities with minimum 51% black ownership: winning tenderer encouraged to procure from designated groups for indirect expenses and direct subcontractor spend. Eskom target for black-owned enterprises is 10%.

Jobs: tenderers must submit proposals for type and number of jobs created and retained in South Africa as a result of the contract.

Skills development: tenderers must submit proposals for developing skills of unemployed candidates. Required learners: 3 Mechanical Technicians (S1 or S2, National Diploma Mechanical), 3 Welders (N3 or equivalent, Trade Test Certificate), 2 Riggers (N3 or equivalent, Trade Test Certificate), total 10. Tenderers bear full cost; Eskom makes no financial contribution.

National Industrial Participation Programme (NIPP): applicable for contracts with foreign content of USD 5 million or more. Winning bidder must negotiate and enter into a NIPP obligation agreement with the dtic before signing the contract with Eskom.

SDL&I penalty and performance security: Eskom will apply a penalty of 2.5% of contract value for failure to meet SDL&I obligations. Eskom will retain 2.5% of every invoice (excluding VAT) as security, released only upon fulfilment of all SDL&I obligations.

Reporting and monitoring: suppliers must submit quarterly reports on SDL&I compliance; Eskom reviews within 30 days; corrective measures required if obligations not met; SDL&I Implementation Schedule must be completed and returned within 28 days after contract award.

Objective criteria: Designated sectors - this commodity is not a designated sector; SBD 6.2 and Annex C are returnable if applicable. CIDB skills development: compulsory training required, Construction Skills Development Goal % is 0.25%; failure to meet this mandatory % renders tender non-responsive.

Market research: Current suppliers providing the services: None; potential suppliers: Open market.

Validity of sworn affidavits: Affidavits must include deponent's name as per ID, identity number, designation (director/owner/member), enterprise name and address, percentage of black ownership and designated group, total revenue and basis, financial year end, B-BBEE status level, empowering supplier status, same signature date for deponent and Commissioner of Oath, and Commissioner cannot be an employee or ex officio of the enterprise.

Section 1: Specific Goals - A maximum of 10 points may be awarded to a tenderer for the specific goal specified for the tender. The points scored for the specific goal must be added to the points scored for price and the total must be rounded off to the nearest two decimal places. Subject to section 2(1)(f) of the Preferential Procurement Policy Framework Act, the contract must be awarded to the tenderer scoring the highest points. Tenderer failing to provide documentation for the allocation of preference points will not be disqualified, but may only score point out of 90 for price and scores 0 points out of 10 for specific goals.

The OHS Specification outlines the minimum occupational health and safety requirements for the maintenance of boiler air and flue gas ducts, including casings/walls, turning vanes, dampers, bracings, protection channels/angle iron, covers, metallic compensators, and metallic expansion joints during philosophy outages (IN, IR, and GO outages) at Tutuka Power Station. The flue gas ducts run from the boiler flue gas hoods to the smokestacks, and the air ducts from the FD fan suctions to the secondary air dampers and to the hot air mills for the primary air.

Eskom Contract's Manager

• Name: Chris Ndlovu

Eskom Health and Safety Manager

• Name: Nomfundo Kumako

Eskom Safety Officer

• Name: Njabulo Mkhwanazi

Mandatory requirements:

• Company must be accredited to at least SANS 3834 Part 3.
• All welders and welding supervisors must be ISO and/or IIW qualified.
• Contractor must sign a Section 37(2) agreement with Eskom.
• Contractor must develop and implement an OHS plan compliant with the OHS specification and all relevant legislation.
• Contractor must hold a valid Letter of Good Standing (COID) and comply with tax and other legal requirements as per the OHS Act.
• Contractor must have a full-time health and safety officer.
• Contractor must comply with Eskom's Life-Saving Rules and substance abuse procedures.
• Contractor must provide medical surveillance for employees as required by the OHS specification.

Scope of work:

• Maintenance of boiler air and flue gas ducts, including casings/walls, turning vanes, dampers, bracings, protection channels/angle iron, covers, metallic compensators, and metallic expansion joints.
• Work performed during philosophy outages (IN, IR, and GO outages) at Tutuka Power Station.
• Flue gas ducts run from boiler flue gas hoods to smokestacks; air ducts from FD fan suctions to secondary air dampers and to hot air mills for primary air.
• Repair/maintenance mainly involves cutting, weld preparation, and welding.

Specific tasks include:

• Opening and closing access doors for inspection/repairs.
• Removing bottom 3 turning vanes on first set of turning vanes on air heater flue gas outlet ducts for scaffolding access.
• Window patching of eroded duct walls, turning vanes, and baffle plates.
• Weld build-up of grooved areas of duct walls.
• Repair of air heater flue gas outlet damper blades, support structures, and pillars.
• Replacement of flue gas damper blade bottom guide stub shafts.
• Installation of protective sleeves on damper blade shafts.
• Fabrication of new damper blades where cost-effective.
• Replacement of small turning vanes and repair of large turning vanes.
• Closing troughs outside flue gas ducts above turning vanes on precipitator inlet ducts.
• Repair of deflector/baffle plates in precipitator inlet slopes.
• Replacement or repair of eroded stays, protecting channels/angle irons/flat bars.
• Fabrication of stay pipes with protecting channels.
• Replacement of gussets, cover plates, and access doors.
• Opening expansion joint sleeves/cover plates for inspection and cleaning ash.
• Repair of expansion joints and sleeves/covers by installing inserts.
• Replacement or repair of oxygen probe support channels and saddles.
• Replacement of access door seals.
• Replacement of dog brackets on expansion joint sleeves/covers.
• Replacement of eroded cat ladder rungs and protecting plates.

Method statement:

• Cut out erosion/corrosion damaged areas per inspection reports and repair instructions.
• Prepare surfaces for welding by grinding to 30° bevel.
• Fit and tack weld components/inserts, then notify inspector for fit-up check per QCPs/ITPs.
• Weld according to approved welding procedures.
• Clean new welds for NDT and inform inspector of welds to be tested.

Key personnel qualifications:

• All welders and welding supervisors must be ISO and/or IIW qualified.
• Submit welders' and welding supervisors' CVs and qualifications for approval by Eskom and the Third-Party Inspection Authority before starting any welding.
• Contractor must have a full-time health and safety officer.

Welding requirements:

• Company must be accredited to at least SANS 3834 Part 3.
• All welding must comply with the Standard for Welding Requirements on Eskom Plants (240-56241933).
• Welding must be performed according to approved EN BS ISO welding procedures; submit procedures for approval by Eskom and the Third-Party Inspection Authority before starting.
• All welders and welding supervisors must be ISO and/or IIW qualified; submit CVs and qualifications for approval.
• All welding must be done per approved Inspection and Test Plans (ITPs).
• A data book must be delivered to Eskom on completion, containing approved scope of work, repair instructions, signed QCPs, welding procedures, welder qualification records, material and electrode certificates, updated drawings (weld map), NDT reports, final release certificate/certificate of completion, and any other relevant information.

Quality requirements:

• Submit ITPs/QCPs before any work commences.
• All inspections must be conducted as per approved ITPs.
• All new materials supplied by the contractor must be delivered with material certificates.
• NDT will be carried out by Eskom partner; contractor must request NDT per approved ITP at least 24 hours in advance in writing.

Legal compliance:

• Contractor must comply with Section 37(2) of the OHS Act by signing an agreement with Eskom, included in the OHS file.
• Hazardous work by children is prohibited; child labour must not be used.
• Contractor must comply with the OHS Act and all applicable regulations, and ensure employees have access to these regulations.
• Contractor must comply with all relevant SANS standards.

Life-Saving Rules:

• All contractors and employees must adhere to Eskom's Life-Saving Rules; violations may lead to disciplinary action, including dismissal.
• Key rules include: no work on live plant above 1000V without proper authorization; no person under influence of intoxicating liquor or drugs while on duty; no work without required permit to work where authorization limitation exists; adherence to live work principles as per High Voltage Live Working Standard.

Substance abuse:

• Contractor must implement a substance abuse testing program on a regular basis; test results marked 'Confidential' and kept in employee's personal file; testing before commencement of work.
• Allowable alcohol and drug level is 0%.

Organisational structure:

• Main contractor must provide an organisational organogram on company letterhead, showing all levels from CE down to supervisors, with names, positions, and legal appointments, signed by the company's 16(1) or 16(2) appointee.
• Copies kept and submitted with OHS plan; updated when appointments change.
• Appointed contractors must also provide their organograms, signed off similarly.

Roles and responsibilities:

• Main contractor must carry out duties per sections 8, 9, and 10 of the OHS Act and other regulations.
• Ensure appointed contractors comply with OHS requirements; maintain list of employees with induction dates, skills, and licenses.
• Provide valid Letter of Good Standing from Compensation Commissioner before work commences and keep renewals on record.
• Evaluate and assess appointed contractors' OHS files; only appoint competent contractors.
• Conduct risk assessments before starting any new task; maintain contract OHS file; be involved in incident investigations.

Contractor site supervisor:

• Ensure compliance with Eskom standards and specifications; report manpower numbers and incident statistics.
• Ensure workers are competent for assigned tasks; list documentary and supervisory controls; submit documents to Eskom project manager representative for approval.

Roof work:

• All roof-related activities must comply with Eskom's Working at Heights Procedure (32-418).

Fire equipment:

• All firefighting equipment must be clearly labelled, numbered, entered in a register, inspected monthly by a competent person, and tested/serviced every 12 months.

Flammable liquids and hazardous chemical agents:

• Any hazardous chemical agent used, handled, or stored must be correctly labelled as per GHS requirements.

First aid:

• First aiders must be trained to level 2; training provider registered per section 26(1) of Skills Development Amendment Act.
• First aid boxes must be available and accessible; contact details of first aider displayed; provision for incidents after working hours.

OHS communication:

• Statutory health and safety committees established per Section 19(2)(a) of OHS Act; records of recommendations kept.

Risk assessment:

• Conduct risk assessments per Eskom's Risk Assessment Procedure (32-520).

Safe work procedures / method statements:

• Develop and implement safe work procedures and method statements for all tasks.

Site establishment:

• Establish site per Eskom requirements, including site roads, vehicle management, housekeeping, stacking/storage, signage, tools/equipment, ladders, scaffolding.

Auditing:

• Main contractor's OHS plan must be approved; Eskom will conduct OHS audits; contractor must also conduct own audits.

Smoking:

• Smoking only in designated areas.

Cellular phones:

• Use restricted in certain areas; must comply with Eskom policies.

Occupational health, hygiene and rehabilitation:

• Conduct Occupational Hygiene Hazard Identification and Risk Assessment (HIRA); implement medical surveillance programs; provide information and training to employees.

Working at heights:

• Follow general requirements, including fall protection plans and compliance with Eskom's Working at Heights Procedure (32-418).

PPE:

• Provide and ensure use of appropriate PPE as per risk assessment and Eskom requirements.

Incident investigation:

• Investigate incidents per Eskom's OHS Incident Management Procedure (32-95) and applicable regulations.

Emergency management:

• Have an emergency management plan in place and comply with Eskom's emergency procedures.

Non-conformance and compliance:

• Report and correct non-conformances; comply with all Eskom requirements and applicable legislation.

OHS files:

• Maintain an OHS file as per OHS Act and Eskom requirements, containing all relevant documentation.

Work stoppage:

• Eskom has the right to stop work if there is imminent danger or non-compliance with OHS requirements.

Hours of work:

• Normal work hours, night work, and overtime must comply with Basic Conditions of Employment Act and Eskom requirements.

Omissions:

• Any omissions from safety and health requirements specification must be brought to Eskom's attention for resolution.

Contractor performance monitoring:

• Contractor's OHS performance will be monitored by Eskom throughout the contract.

Contract sign off:

• Contract signed off upon completion, subject to compliance with all OHS requirements.

Right to terminate:

• Eskom reserves the right to terminate the contract if contractor fails to comply with OHS requirements.

Barricading:

• Ensure proper barricading of work areas to prevent unauthorized access and ensure safety.

The air and flue gas ducts at Tutuka Power Station erode during operation. The flue gas ducts from the flue gas hoods to the precipitator inlet ducts suffer erosion of walls/casings, stays/bracings, turning vanes, dampers, protecting channels/angle irons, cover plates and expansion joint sleeves/covers. The precipitator flue gas outlet ducts to the smoke stack have minor erosion but may corrode. Air duct walls erode around control air dampers, especially hot air recirculating and secondary air dampers. Metallic expansion joints are subject to cracking, corrosion and erosion of sleeves. Failure of ducts leads to fan capacity issues, high motor currents, load losses, and potential unit shutdowns. Maintenance is contracted out through open tender, performed during outages.

Minimum weighted technical score to be considered: 70%.

Qualitative criteria (total 100%):

1. Compliance to Eskom welding standard 240-106628253 (30%):

• ISO3834 Part 3 accreditation (70% of this criterion): 5 points for certificate; 2 points for letter from assessment body confirming requirements met but certificate pending; 0 for none.
• Qualified Welding Procedure Specification (WPS) for 15Mo3 plate up to 20mm and pipes up to 300mm diameter (30%): 5 points for both plate and pipe certificates; 4 for plate only; 2 for pipe only; 0 for none.

2. Verifiable reference list of similar work (duct repair or fabrication) within Eskom or other industry in last 5 years (20%): 5 points for 4+ references; 4 for 3; 2 for 1-2; 0 for none.
3. Staff experience and qualifications for maintenance work at Eskom power plants or other industry (20%):

• Management (20% of this criterion): 5 points for 5+ years; 4 for 4 years; 2 for 2-3 years; 0 for 0-1 year.
• Supervisors (at least 3 covering welding, pipe fitting, boiler-making) (40%): 5 points for 3 supervisors with 3+ years; 4 for 2 years; 2 for 1 year; 0 for none.
• Artisans/technicians (boilermakers, pipe fitters, quality inspectors, riggers etc.) (40%): 5 points for 4 different disciplines; 4 for 3; 2 for 2; 0 for none.

4. List of welders qualified to the WPS (10%): 5 points for 5+ welders; 4 for 4; 2 for 3 or fewer; 0 for none.
5. Approved general Inspection Test Plans (ITPs) for window patch, stay pipe, protecting channel, multi-convoluted metallic expansion joint, gusset repairs and weld build-up (20%): 5 points for 5 ITPs; 4 for 4; 2 for 2-3; 0 for 0-1.

Scoring scale: 5 = 100% compliant; 4 = 80% compliant with acceptable risks/exceptions/conditions; 2 = 40% non-compliant; 0 = 0% totally deficient or non-responsive. Scores of 1 and 3 are not used.

Acceptable technical risks:

• ISO3834 Part 3 certificate (Parts 1 and 2 accepted).
• Welding procedure certificate for plate only.
• Reference list with 3 or 4 references.
• Manager with 4 years experience.
• Supervisor with 2 years experience.
• List with 3 different artisan/technician disciplines.
• List with 4 welders.
• Approved ITPs (4 off).

Unacceptable technical risks:

• No ISO3834 certificate.
• Welding procedure for pipes only.
• Reference list with 1 or 2 references.
• Manager with 2-3 years experience.
• Supervisor with 1 year experience.
• List with 2 different artisan/technician disciplines.
• List with 2 welders.
• Approved ITPs (2-3 off).

Acceptable exceptions/conditions:

• Verifiable references of currently active projects included in the list.
• Staff have no relevant Eskom power plant outage work but have experience on similar scope outside Eskom.
• ITPs demonstrate a good understanding of the scope.

Unacceptable exceptions/conditions:

• No verifiable references for projects completed at Eskom power plant outages or oil refinery plant maintenance shutdowns.
• No relevant experience on Eskom power plant outages or other industry, or no certified copies of qualifications submitted.
• ITPs do not show a good understanding of the scope.

Scope: Maintenance of air and flue gas ducts and metallic expansion joints at Tutuka Power Station.

Areas subject to erosion/corrosion:

• Flue gas ducts from flue gas hoods to precipitator inlet ducts: walls/casings, stays/bracings, turning vanes, dampers, protecting channels/angle irons, cover plates, expansion joint sleeves/covers.
• Precipitator flue gas outlet ducts to smoke stack: minor erosion, possible corrosion.
• Air duct walls around control air dampers, especially hot air recirculating and secondary air dampers.
• Metallic expansion joints: cracking, corrosion (low temperature flue gas ducts), erosion of sleeves.

Consequences of duct failure:

• Eroded damper sealing surfaces cause dampers to pass, leading to secondary air leaks, FD/PA fans running out of capacity, high motor currents, and mill load losses.
• Holes in flue gas ducts cause air ingress, ID fans running out of capacity, high motor currents, RVCs opening fully, positive furnace pressure, and partial load losses.
• Eroded turning vanes fail to direct flue gas, causing high velocities and accelerated erosion.
• Eroded damper blades fail to stop flue gas flow when one draught group is out of service.
• Eroded stays/bracings fail to keep ducts rigid; fallen bracings can get stuck in air heaters, requiring unit shutdown.

Maintenance is contracted out through open tender/enquiry, performed during outages.

Related documents:

• 240-48929482: Tender Technical Evaluation Procedure
• 15ENG STR 001: Draught Plant Maintenance Execution Strategy
• 15ENG GEN-1438: Scope of Work for Maintenance of Air and Flue Gas Ducts
• ISO 9001 (informative reference)

Staff experience and qualifications are evaluated as follows:

• Management: CV and copies of qualifications; at least 5 years relevant experience for full points.
• Supervisors: at least 3 supervisors covering welding, pipe fitting and boiler-making; CVs and qualifications; at least 3 years experience for full points.
• Artisans/technicians: boilermakers, pipe fitters, quality inspectors, riggers etc.; list of personnel with CVs and qualifications; 4 different disciplines for full points.
• Welders: list of welders qualified to the WPS, with CVs and qualifications; at least 5 welders for full points.

Acceptable exception: staff have no relevant Eskom power plant outage work but have experience on similar scope outside Eskom.

Unacceptable exception: no relevant experience on Eskom power plant outages or other industry, or no certified copies of qualifications submitted.

Bidders must submit approved general Inspection Test Plans (ITPs) covering window patch, stay pipe, protecting channel, multi-convoluted metallic expansion joint, gusset repairs and weld build-up. The ITPs must demonstrate a good understanding of the scope of work. ISO 9001 is listed as an informative reference.

Minimum weighted technical score to be considered: 70%. Qualitative criteria as detailed in the main evaluation section. No mandatory technical evaluation criteria are listed (Table 2 is N/A).

Closing date: 04 June 2026

Returnable documents:

• Form A (Tender & Contract Quality Requirements): complete, sign and submit to acknowledge and accept Eskom Supplier Quality Requirements per specification 240-105658000 and ISO 9001.
• Indicate applicability of each clause with an X (applicable) or - (not applicable).
• Select only one pre-contract award quality category; Category 1 applies.
• Provide the tenderer's Quality Representative name, designation, date and signature.

The tenderer must complete and sign Form A to acknowledge and accept Eskom Supplier Quality Requirements. The tenderer must indicate applicability of each clause with an X or -. The tenderer must select only one pre-contract award quality category (Category 1 applies). The tenderer must provide its Quality Representative's name, designation, date, and signature.

ISO 9001 clauses and quality principles apply, including context of the organisation, leadership, planning, support, operation, performance evaluation, and improvement.

Quality requirements per specification 240-105658000 and ISO 9001 apply. Post-contract award conditions include contract execution, supplier quality performance monitoring, Eskom rights of access and information, preservation, quality audits, management of nonconformities, and special processes. The tenderer must complete and sign Form A to acknowledge and accept these requirements.

No specific requirements found