Supply of manual and actuated valves for NW plasma gas air-purification system project

Not explicitly stated in the provided document. Typically for Necsa nuclear-related procurements: valid South African supplier registration, ISO 9001 quality management, nuclear industry experience preferred, ability to provide material test certificates (EN 10204 3.1), compliance with ASME/ASME B16.5 standards, and capability to meet nuclear facility supply chain requirements. Suppliers must demonstrate technical capability for actuated valve assemblies with pneumatic/solenoid actuators.

The tender is for the supply of manual and actuated valves for a plasma gas air-purification system. The technical specifications are detailed in a valve list table. Key points include:

• Valves must meet specific design conditions: pressure up to 1965 kPa(g) and temperatures up to 38°C.
• Materials of construction are specified, including ASTM A105/A216 WCB carbon steel bodies and ASTM 316 stainless steel trim.
• Flange specifications include RF (Raised Face) type with 150# rating, conforming to ASME B16.5.
• Valve types include ball valves and globe valves in sizes from 15 mm to 40 mm.
• Some valves are shared between the NW PlasGas and CWOPG facilities (indicated by 'Y' in the shared column).
• Actuated valves are specified with pneumatic or solenoid actuators.
• The scrubbing solution and off-gas compositions change over time due to chemical reactions in the scrubber, which may affect valve selection.
• Process ventilation pipeline and valve sizes are to be determined during HVAC system design.

The scrubbing solution composition changes over time due to chemical reactions in the scrubber. At the end of phase 1, the composition (by weight) is approximately 67.67% water, 1.05% KCl, and 30.78% K2CO3.

The scrubber off-gas composition also changes: starting with 1.3% CO2, 0.1% HCl, 51.9% O2, and 46.7% N2; later shifting to higher CO2 concentrations.

Valves are designated as shared ('Y') between the NW PlasGas and CWOPG facilities, or used only in NW PlasGas ('N').

One valve is shared due to a centralized instrument air supply system servicing all plasma gasification facilities in the V-H2 building.

The valve list includes safety classifications:

• Some valves are designated for non-nuclear and non-chemical safety classes.
• Operating conditions include ambient temperatures and specific pressure ratings.
• Actuators are specified as pneumatic or solenoid for fail-safe operation.

• Closing Date: 24 July 2026.
• Closing Time: 17:00.
• Site Briefing: Not compulsory, but can be arranged if more information is required.
• Quotation Validity: 90 days from the closing date.

• Contact Person: Catherine Matima.
• Email for submissions and queries: [email protected].
• Important: All queries must be in writing to this email only. Do not approach any other Necsa employee.

• Submit quotation by the closing date and time: 24 July 2026 at 17:00.
• Submission method: Email response to [email protected].
• Quotation must be complete; incomplete quotes may be disqualified.
• Orders above R30,000 will be evaluated under PPPFA 80/20-point system and functionality scorecard.
• Orders above R1 million will undergo a full tender process.
• Necsa reserves the right to cancel or reject any quote, not award to the lowest bidder, award parts to different bidders, or not award at all.
• Do not approach any Necsa employee other than the designated contact; doing so may result in disqualification.
• No goods or services should be delivered without an official Necsa purchase order.

Suppliers must hold ISO 9001:2015 certification (or source from ISO 9001 certified OEM), provide technical data sheets for each valve model, meet lead time requirements, submit valid B-BBEE certification for preference points, and comply with Necsa's General Conditions of Purchase, PPPFA 2022 Regulations, and GCC. Non-compliant B-BBEE status scores 0 preference points.

• Scope: Supply system manual valves for the Low-Level Waste Plasma Gasification (NW Plasma Gas) Demonstration Project.
• Deliverables: As per attached Air Purification System Manual and Actuated Valve List [01] and P&ID [02].
• Specific valve list (11 items):

1. AP17-196 CB-40 fc
2. AP17-179 CB-40 NO
3. AI17-183 CG-40 NC
4. AI17-180 CB-40 NO
5. AI17-177 CB-25 NO
6. AI17-195 CB-15 NC
7. AI17-154 CB-15 NO
8. AI17-190 CB-15 NO
9. AI17-191 CB-15 fc
10. AI17-175 CB-15 fc
11. AI17-176 CB-15 fc

• Notes:

• 'Y' indicates valve shared between NW PlasGas and CWOPG facilities.
• 'N' indicates valve used only in NW PlasGas facility.

• Key attachments:

• ENS-NWPVR-LST-24002, Rev.5: Valve List.
• ENS-NWPVR-PID-24014: P&ID Diagram for Compressed Air Supply to LAB 02 150 & LAB 131.

• Supplier must provide product data sheets and curves documents.

• All queries must be submitted in writing to the designated contact email.
• Do not approach any other Necsa employee; doing so may lead to disqualification.
• No goods or services should be delivered without an official Necsa purchase order.

• Necsa commits to compliance with ISO 14001, OHSAS 18001, RD 0034, ISO 9001, and ISO 17025.
• For bid evaluation: Supplier must provide ISO 9001:2015 (or latest) accreditation as a supplier of the required products, or ISO 9001 accreditation of the OEM.

• Prices must be quoted inclusive of all applicable taxes.
• Prices must be fixed and firm.
• Quoted price must include all additional costs: freight, insurance until acceptance, duty (if applicable), disbursements.
• Payment terms: According to Necsa's General Conditions of Purchase.
• Quotation must be completed in full; incomplete quotes may be disqualified.

• Mandatory documents to submit:

• Valid Tax Clearance Certificate (Tax PIN issued by SARS).
• Declaration of Interest (SBD 4).
• B-BBEE Certificate or applicable affidavit if classified as an EME.
• Letter of Good Standing (Compensation for Occupational Injuries and Diseases Act) if applicable due to nature of work.
• Any other document or certification requested in the RFQ.
• Supply pump data sheet and curves documents.

• B-BBEE: Failure to submit proof of B-BBEE status level will be interpreted as not claiming preference points.
• The purchaser reserves the right to require substantiation of B-BBEE claims at any time.
• The RFQ is subject to Necsa's General Conditions of Purchase, PPPFA 2000, Preferential Procurement Regulations 2022, General Conditions of Contract (GCC), and other applicable legislation.

• Submit a Letter of Good Standing (COID) if applicable due to the nature of the work.
• Ensure compliance with all health and safety requirements as per Necsa's policies and relevant regulations.

• The project involves a plasma gasification demonstration facility to reduce combustible waste into CO2, water, and melted metals.
• Refer to attached valve list and P&ID for specific system requirements.

• Prices are fixed, firm, and inclusive of all taxes and additional costs (freight, insurance, duty).
• Payment will be according to Necsa's General Conditions of Purchase.
• Supplier must not offer any gifts, payments, or inducements to Necsa employees; doing so constitutes a material breach and allows immediate termination.
• By responding, the bidder acknowledges and agrees to comply with Necsa's General Conditions of Purchase, PPPFA 2000, Preferential Procurement Regulations 2022, GCC, and attached technical specifications.

• Quotation must be submitted by the closing date and time.
• Orders above R30,000 evaluated under PPPFA 80/20 system and functionality scorecard.
• Orders above R1 million undergo tender process.
• Necsa reserves the right to cancel, reject, or not award the RFQ.