Broad-Based Black Economic Empowerment Act (B-BBEE Act)
Act 53 of 2003
Provides the empowerment-compliance context often used in public-sector supplier evaluation.
Relevant because this is a South African public-sector procurement opportunity.
Documents available on tender detail page
Tender Type
Request for Bid(Open-Tender)
Delivery Location
Duinzicht Avenue - MOSSEL BAY - Mossel Bay -
Organization Type
GOVERNMENT
Published
03 Jun 2026
OCDS Reference
ocds-9t57fa-157977
This tender invites bids for the supply and delivery of a two-cylinder lpg gas compressor to petrosa's refinery in mossel bay, western cape. IT is an open-tender request for bid targeting suppliers capable of meeting professional service and equipment delivery standards.
Returnable Documents: Not specified in the provided text.
Returnable Documents: Not specified in the provided text.
Returnable Documents: Not specified in the provided text.
Returnable Documents:
A complete, skid-mounted, electrically driven LPG reciprocating compressor
package for LPG offloading from road tankers. The package shall include the
compressor, driver, all ancillary systems, and a fully integrated control panel with
motor starting and control systems interface, pressure safety valve and air cooler.
The package shall be fully assembled, wired, tested, and ready for connection to
site power, process piping, and the main plant control system.
In addition to supply, the vendor shall include Instrument Function testing,
commissioning, Training (Maintenance and Operator) and Site Acceptance testing
(SAT). Maintenance of compressor should be handed over to PetroSA maintenance
team. The compressor maximum discharge flow to be 50m3/hr.
Final approval is required prior to procurement of any major equipment
(compressor, motor, panel, instruments).
The successful vendor is responsible for ensuring the entire package meets all
stated South African regulatory and certification standards.
2. Applicable standards
Please ensure that the compressor package proposed for offloading LPG (Liquefied
Petroleum Gas) from a road tanker into a storage tank complies with the following
mandatory standards and certifications.:
handling flammable gases.
selection, installation, inspection, and maintenance of Ex-certified equipment).
Required Certifications (to be supplied with the package):
IECEx / IA certificate).
relevant pressure equipment certification in accordance with SANS 347 (if
applicable).
package.
3. Hazardous area classification requirements
All electrical and instrumentation equipment, including the compressor skid, control
panel, junction boxes, cable glands, and switches, shall be certified and suitable for
use in a Zone 2 hazardous area. The selected Ex protection types shall be clearly
stated and certified by an approved body. All equipment must comply with IEC
60079 series and relevant SANS standards.
The complete package must possess valid Certificates of Conformity from a South
African Accredited Inspection Authority (IA).
IA certification is a condition for delivery and final payment.
Vendor to verify applicable ratings for the specific motor / instrumentation /
compressor system configuration.
Area Classification: Zone 2
Gas Group: IIA
Temperature Class: T2
4. Electrical / control systems requirements
4.1 Basic Electrical Design Data
Service: LPG Vapour Recovery / Tanker Offloading
Drive: Electric Motor with V-belt Drive
Power Supply: 525V AC, 3-Phase, 50Hz
Bidders are requested to indicate:
PetroSA will provide 525 Vac, 50 Hz power supply to the LPG compressor skid.
require any additional or alternative auxiliary power supplies (e.g., 230 V AC, 110
V AC, 24 V DC, etc.) beyond the 525 V AC input.
whether these will be derived within the vendor’s scope or to be provided by
PetroSA.
range includes 525Vac.
phase or 3 phase + neutral arrangement.
4.2 Electric Motor Technical specifications
environment.
show the hazardous area certification mark.
Certificate. Ex Certification documentation is mandatory.
specified electric induction motor via a V-belt drive system.
ensure reliable starting of the compressor under unloaded conditions (with the
compressor's unloading mechanism, e.g., the four-way valve, in the unload
position) across the full specified range of suction pressures and gas
compositions.
accumulation of static electricity and shall be certified as suitable for use in the
specified Zone 2 hazardous area. Belt material and construction shall be oil-
resistant where exposed to the environment.
be constructed of non-sparking material (e.g., painted mild steel, aluminum with
non-sparking coating) and designed to allow for safe ventilation while preventing
access to moving parts during operation. The guard shall be easily removable for
maintenance.
4.3 Local Control Panel (Motor Starter Panel Section)
powder coat finish. Material selection is subject to final approval based on
corrosion resistance requirements.
arrangement shall be certified for a Zone 2 installation.
Certificate. Ex Certification documentation is mandatory.
Components (as a minimum):
o Main Isolator: A lockable, load-breaking isolator switch, rated for the full load
current (FLC) and short-circuit capacity.
o Motor Starter: Direct-On-Line (DOL) as required by motor size. Starter shall
include:
▪ Contactor: Rated for frequent LPG duty.
▪ Overload Relay: Solid-state, adjustable, with phase loss protection. Set
point adjustable from 100-125% of motor FLC.
▪ Short-Circuit Protection: Current-limiting circuit breakers
o Control Devices:
▪ Start/Stop Pushbuttons: Guarded or flush-mounted as appropriate.
▪ Trip Reset Button.
o Indications: LED pilot lights with engraved legends:
▪ Green: Power On
▪ Green: Motor Running
▪ Red: Motor Stopped
▪ Amber: Motor Tripped
o Internal Wiring: All wiring shall be numbered, routed in trunking, and use
tinned copper conductors. Separate compartments or segregation shall be
provided for AC power, DC instrument power, and signal wiring.
o Termination: External power and signal cables shall terminate in certified ex-
rated cable glands. Internal terminal blocks shall have 20% spare capacity. A
dedicated, labelled earthing bar shall be provided.
4.4 Local Control PaneI (Instrumentation & Control System Interface
section)
powered from 24V DC.
20mA, All binary (discrete) signals shall be volt-free contacts (dry contacts) for
outputs.
PLC. Note: PetroSA has standardized on Rockwell PLC systems.
mounted on the skid for all external signals to the plant DCS/ESD. This JB shall
be the demarcation point between package and plant cabling. Internal wiring
from the control panel to this JB is within the vendor's scope.
1⁄2” npt.
PetroSA Control Systems:
o Binary Output to PetroSA – Compressor Running Status (51ML3020)
o Binary Output to PetroSA – General Trip (51XA3022)
o Binary Input from PetroSA – ESD Status (51XL3011). External Interlock:
One common permissive signal -System Ready (External Interlocks
Cleared), Loss of 24V DC = Trip/Prevent Start.
The ESD Status signal (tag 51XL3011) shall be indicated on the local control
panel via a green LED-type pilot light. The pilot light shall be fitted with an
engraved legend clearly identifying the function.
Green: ESD Healthy
Red: ESD Tripped
Control Systems:
o Compressor Suction Pressure (51PT3001)
o Suction K.O Drum Level (51LT3001)
o Compressor Discharge Pressure (51PT3002)
o Compressor Discharge Temperature (51TT3001)
(Note: If transmitters are not supplied by vendor, the required tapping points in the
process lines should be provided. Final approval shall be obtained before the
procurement of any instruments associated with the package.
o Compressor Suction Pressure
o Compressor Discharge Pressure
The compressor control system shall monitor and provide alarms/trips for the
following via the local control panel including LED pilot lights (amber) with
engraved legends, audible horn, and control buttons.:
o Lube Oil Pressure Low (Alarm & Trip)
o Cooling Water Pressure Low (Alarm & Trip)
o Cooling Water Temperature High (Alarm)
o Liquid Level in Knock-Out Pot High (Alarm & Trip)
o Gas Suction Pressure Low (Alarm & Trip)
o Gas Discharge Pressure High (Alarm & Trip)
o Gas Discharge Temperature High (Alarm & Trip)
o Motor overload (Alarm & Tripped)
To DCS To DCS
51Pt3001
51Lt3001 51pg3002
H l
Ll
51Pxsll3003
51Pg3002
51Pxshh3004 51txshh3002
51Lxshh3002
Local Panel: (Signals To/From ESD)
51-KR101
51Ml3020
Comp Run
Status
Hh 51xa3022
51-VD301 H H Comp Gen Trip
Alarm to ESD32
51Pt3002 51tt3001
Pos 1 Pos 2 51PXSLL3005 To DCS To DCS ESD3251XL3011TRIP LTG Trnf
Vap Trnf
(Comp Rdy to
Strt)
51Hv3018
To/From To/From
Sphere Truck
51Ov3013 51ov3012 51hxv1707
51 esd 30
Control System Schematic
5. Mechanical requirements and specifications
5.1 Knock-Out Drum (Suction Pot)
A knock-out drum shall be provided as an integral part of the compressor skid. The
purpose is to prevent liquid LPG carry-over from entering the compressor.
Design and Construction:
Parameter Requirement
Service LPG vapour with possible liquid carry-over
Design pressure 2400 kPa (min) / Vendor to state
Design temperature -45°C to 65°C (min range)
Carbon steel (ASTM A516 Gr 70 or equivalent) suitable
Material of construction
for LPG service
Corrosion allowance 3 mm (minimum)
To be sized for adequate liquid holdup (vendor to
Internal volume calculate based on expected liquid carry-over). Minimum
50 litres recommended.
Drain connection 1" NB valve at bottom (manual drain valve supplied)
Inspection openings Manway or blind flange for internal inspection
Hydrostatic test Per design code – certificate required
The knock-out drum to be designed for full vacuum service.
Design Code: The knock-out drum shall be designed, manufactured, tested, and
stamped in accordance with:
PetroSA.
Approved Inspection Authority (AIA) shall be provided for the vessel.
5.2 Piping within skid:
appropriate
(316L/graphite) and B7 studs/2H nuts
6. Civil works requirements (petrosa responsibility)
The skid package shall be designed to allow installation on a simple reinforced concrete
foundation to be provided by PetroSA. To enable PetroSA’s civil engineer to design the
foundation, the vendor shall provide the following information as part of the tender
submission (preliminary) and final detailed submission after order placement:
Required data (preliminary with tender):
Item Data Required
Overall skid dimensions (L × W × H) millimetres (mm)
Total operating weight (including all equipment, piping, oil,
kilograms (kg)
gas, but excluding foundation)
Item Data Required
Total erection weight (max lifting weight during installation) kilograms (kg)
Number and location of support points (skid feet) drawing or sketch
Anchor bolt diameter, length, projection, and material (if
millimetres / grade
supplied by vendor)
Anchor bolt hole sizes and locations (centre-to-centre
millimetres / tolerance
dimensions)
Maximum static load per support point (operating and
kN
erection)
Maximum dynamic load (if any – e.g., from compressor kN or statement of
reciprocating forces) negligible
Vibration isolation requirement (anti-vibration pads, spring vendor to state if
mounts, etc.) required
MPa or “E” concrete
Minimum foundation strength requirement (if known)
grade
Skid top of steel elevation (distance from bottom of skid
millimetres
feet to top of skid beams)
Utility connection points (electrical, instrument, process)
millimetres
and their approximate distances from skid edge
Civil scope split:
provide levelling shims (if required), indicate any grouting requirements.
provide anchor bolt embedded templates if bolts are not supplied loose, prepare
foundation surface, grout skid after alignment.
The vendor shall ensure the skid can be aligned and levelled using standard jacking
screws or shims on a flat concrete foundation with anchor bolts cast in.
7. Drawings and documentation
The vendor shall submit for approval and supply as-built copies of all listed documents,
including but not limited to:
Termination Diagrams, Panel Layout, Interconnection Diagrams.
Sheets.
certificates,
Procedures & Reports.
spares
o Confirm whether spare parts are held locally within South Africa (e.g.,
Johannesburg, Cape Town, Durban).
o Provide details of any authorized local representative or agent, including:
➢ Company name
➢ Contact person
➢ Contact details
➢ Scope of support (spares, maintenance, technical support, etc.)
o If not available locally:
➢ Provide contact details of authorized agents and expected lead times for
delivery to site
Documentation to be supplied by vendor for the knock-out drum:
Spare Parts Interchangeability Record (SPIR): The vendor shall provide a
complete SPIR listing all mechanical, electrical, and instrument components with:
spares)
8. Tender documentation deliverables
all equipment, piping (with line sizes and materials), valves, instrumentation (with
tag numbers), and control loops. This must be submitted with the tender.
compressor skid package.
Datasheet provided and submit it as part of the tender documentation.
Datasheet provided and submit it as part of the tender documentation.
Bidders are required to submit a formal declaration regarding compliance with all
the technical specifications stipulated, where the Bidders proposal deviates from
the technical specifications provided:
o A detailed, itemized list of deviations, including:
➢ Description of each deviation
➢ Technical justification
➢ Proposed alternative solution
o Normal delivery (weeks from order)
o Expedited delivery (weeks from order, with additional cost if any)
9. Site establishment
Bidders are to make allowance for the following site requirements:
hazardous area work.
10. Commissioning
The Bidder shall provide commissioning and site start-up support for the complete LPG
reciprocating compressor package, including verification of mechanical, electrical,
instrumentation, and control system performance.
10.1 Commissioning scope (minimum)
Commissioning support shall include (as applicable):
10.2 Commissioning deliverables
forms
11. Training
The vendor shall provide training to PetroSA personnel to ensure safe operation, routine
maintenance, and troubleshooting of the compressor package and its control system.
11.1 Training scope
Training shall cover at minimum:
reset/acknowledgement logic
water pressure/temp, suction/discharge pressure/temp, liquid level knock-out,
overload/trip, if applicable)
mapping)
inspection/replacement guidance)
12. Commissioning & training as tender pricing items
PetroSA requires that bidders clearly price for the following in addition to supply of the
LPG compressor package:
13. Commercial requirements
A mandatory bid clarification meeting will be held (date and time to be advised
separately). All bidders are required to attend to raise technical and commercial queries
regarding this specification.
To assist procurement, vendors shall provide the following commercial breakdown:
Amount (ZAR excl
Item Description
VAT)
1 Compressor skid (complete as per scope)
2 Commissioning spares
Site commissioning & training (3 days incl.
travel/accommodation)
Optional: expedited delivery (if different from
normal)
5 Total (excl VAT)
No specific requirements found
{"name":null,"email":null,"phone":null,"department":null,"address":"Control Devices"}
A complete, skid-mounted, electrically driven LPG reciprocating compressor
package for LPG offloading from road tankers. The package shall include the
compressor, driver, all ancillary systems, and a fully integrated control panel with
motor starting and control systems interface, pressure safety valve and air cooler.
The package shall be fully assembled, wired, tested, and ready for connection to
site power, process piping, and the main plant control system.
In addition to supply, the vendor shall include Instrument Function testing,
commissioning, Training (Maintenance and Operator) and Site Acceptance testing
(SAT). Maintenance of compressor should be handed over to PetroSA maintenance
team. The compressor maximum discharge flow to be 50m3/hr.
Final approval is required prior to procurement of any major equipment
(compressor, motor, panel, instruments).
The successful vendor is responsible for ensuring the entire package meets all
stated South African regulatory and certification standards.
2. Applicable standards
Please ensure that the compressor package proposed for offloading LPG (Liquefied
Petroleum Gas) from a road tanker into a storage tank complies with the following
mandatory standards and certifications.:
handling flammable gases.
selection, installation, inspection, and maintenance of Ex-certified equipment).
Required Certifications (to be supplied with the package):
IECEx / IA certificate).
relevant pressure equipment certification in accordance with SANS 347 (if
applicable).
package.
3. Hazardous area classification requirements
All electrical and instrumentation equipment, including the compressor skid, control
panel, junction boxes, cable glands, and switches, shall be certified and suitable for
use in a Zone 2 hazardous area. The selected Ex protection types shall be clearly
stated and certified by an approved body. All equipment must comply with IEC
60079 series and relevant SANS standards.
The complete package must possess valid Certificates of Conformity from a South
African Accredited Inspection Authority (IA).
IA certification is a condition for delivery and final payment.
Vendor to verify applicable ratings for the specific motor / instrumentation /
compressor system configuration.
Area Classification: Zone 2
Gas Group: IIA
Temperature Class: T2
4. Electrical / control systems requirements
4.1 Basic Electrical Design Data
Service: LPG Vapour Recovery / Tanker Offloading
Drive: Electric Motor with V-belt Drive
Power Supply: 525V AC, 3-Phase, 50Hz
Bidders are requested to indicate:
PetroSA will provide 525 Vac, 50 Hz power supply to the LPG compressor skid.
require any additional or alternative auxiliary power supplies (e.g., 230 V AC, 110
V AC, 24 V DC, etc.) beyond the 525 V AC input.
whether these will be derived within the vendor’s scope or to be provided by
PetroSA.
range includes 525Vac.
phase or 3 phase + neutral arrangement.
4.2 Electric Motor Technical specifications
environment.
show the hazardous area certification mark.
Certificate. Ex Certification documentation is mandatory.
specified electric induction motor via a V-belt drive system.
ensure reliable starting of the compressor under unloaded conditions (with the
compressor's unloading mechanism, e.g., the four-way valve, in the unload
position) across the full specified range of suction pressures and gas
compositions.
accumulation of static electricity and shall be certified as suitable for use in the
specified Zone 2 hazardous area. Belt material and construction shall be oil-
resistant where exposed to the environment.
be constructed of non-sparking material (e.g., painted mild steel, aluminum with
non-sparking coating) and designed to allow for safe ventilation while preventing
access to moving parts during operation. The guard shall be easily removable for
maintenance.
4.3 Local Control Panel (Motor Starter Panel Section)
powder coat finish. Material selection is subject to final approval based on
corrosion resistance requirements.
arrangement shall be certified for a Zone 2 installation.
Certificate. Ex Certification documentation is mandatory.
Components (as a minimum):
o Main Isolator: A lockable, load-breaking isolator switch, rated for the full load
current (FLC) and short-circuit capacity.
o Motor Starter: Direct-On-Line (DOL) as required by motor size. Starter shall
include:
▪ Contactor: Rated for frequent LPG duty.
▪ Overload Relay: Solid-state, adjustable, with phase loss protection. Set
point adjustable from 100-125% of motor FLC.
▪ Short-Circuit Protection: Current-limiting circuit breakers
o Control Devices:
▪ Start/Stop Pushbuttons: Guarded or flush-mounted as appropriate.
▪ Trip Reset Button.
o Indications: LED pilot lights with engraved legends:
▪ Green: Power On
▪ Green: Motor Running
▪ Red: Motor Stopped
▪ Amber: Motor Tripped
o Internal Wiring: All wiring shall be numbered, routed in trunking, and use
tinned copper conductors. Separate compartments or segregation shall be
provided for AC power, DC instrument power, and signal wiring.
o Termination: External power and signal cables shall terminate in certified ex-
rated cable glands. Internal terminal blocks shall have 20% spare capacity. A
dedicated, labelled earthing bar shall be provided.
4.4 Local Control PaneI (Instrumentation & Control System Interface
section)
powered from 24V DC.
20mA, All binary (discrete) signals shall be volt-free contacts (dry contacts) for
outputs.
PLC. Note: PetroSA has standardized on Rockwell PLC systems.
mounted on the skid for all external signals to the plant DCS/ESD. This JB shall
be the demarcation point between package and plant cabling. Internal wiring
from the control panel to this JB is within the vendor's scope.
1⁄2” npt.
PetroSA Control Systems:
o Binary Output to PetroSA – Compressor Running Status (51ML3020)
o Binary Output to PetroSA – General Trip (51XA3022)
o Binary Input from PetroSA – ESD Status (51XL3011). External Interlock:
One common permissive signal -System Ready (External Interlocks
Cleared), Loss of 24V DC = Trip/Prevent Start.
The ESD Status signal (tag 51XL3011) shall be indicated on the local control
panel via a green LED-type pilot light. The pilot light shall be fitted with an
engraved legend clearly identifying the function.
Green: ESD Healthy
Red: ESD Tripped
Control Systems:
o Compressor Suction Pressure (51PT3001)
o Suction K.O Drum Level (51LT3001)
o Compressor Discharge Pressure (51PT3002)
o Compressor Discharge Temperature (51TT3001)
(Note: If transmitters are not supplied by vendor, the required tapping points in the
process lines should be provided. Final approval shall be obtained before the
procurement of any instruments associated with the package.
o Compressor Suction Pressure
o Compressor Discharge Pressure
The compressor control system shall monitor and provide alarms/trips for the
following via the local control panel including LED pilot lights (amber) with
engraved legends, audible horn, and control buttons.:
o Lube Oil Pressure Low (Alarm & Trip)
o Cooling Water Pressure Low (Alarm & Trip)
o Cooling Water Temperature High (Alarm)
o Liquid Level in Knock-Out Pot High (Alarm & Trip)
o Gas Suction Pressure Low (Alarm & Trip)
o Gas Discharge Pressure High (Alarm & Trip)
o Gas Discharge Temperature High (Alarm & Trip)
o Motor overload (Alarm & Tripped)
To DCS To DCS
51Pt3001
51Lt3001 51pg3002
H l
Ll
51Pxsll3003
51Pg3002
51Pxshh3004 51txshh3002
51Lxshh3002
Local Panel: (Signals To/From ESD)
51-KR101
51Ml3020
Comp Run
Status
Hh 51xa3022
51-VD301 H H Comp Gen Trip
Alarm to ESD32
51Pt3002 51tt3001
Pos 1 Pos 2 51PXSLL3005 To DCS To DCS ESD3251XL3011TRIP LTG Trnf
Vap Trnf
(Comp Rdy to
Strt)
51Hv3018
To/From To/From
Sphere Truck
51Ov3013 51ov3012 51hxv1707
51 esd 30
Control System Schematic
5. Mechanical requirements and specifications
5.1 Knock-Out Drum (Suction Pot)
A knock-out drum shall be provided as an integral part of the compressor skid. The
purpose is to prevent liquid LPG carry-over from entering the compressor.
Design and Construction:
Parameter Requirement
Service LPG vapour with possible liquid carry-over
Design pressure 2400 kPa (min) / Vendor to state
Design temperature -45°C to 65°C (min range)
Carbon steel (ASTM A516 Gr 70 or equivalent) suitable
Material of construction
for LPG service
Corrosion allowance 3 mm (minimum)
To be sized for adequate liquid holdup (vendor to
Internal volume calculate based on expected liquid carry-over). Minimum
50 litres recommended.
Drain connection 1" NB valve at bottom (manual drain valve supplied)
Inspection openings Manway or blind flange for internal inspection
Hydrostatic test Per design code – certificate required
The knock-out drum to be designed for full vacuum service.
Design Code: The knock-out drum shall be designed, manufactured, tested, and
stamped in accordance with:
PetroSA.
Approved Inspection Authority (AIA) shall be provided for the vessel.
5.2 Piping within skid:
appropriate
(316L/graphite) and B7 studs/2H nuts
6. Civil works requirements (petrosa responsibility)
The skid package shall be designed to allow installation on a simple reinforced concrete
foundation to be provided by PetroSA. To enable PetroSA’s civil engineer to design the
foundation, the vendor shall provide the following information as part of the tender
submission (preliminary) and final detailed submission after order placement:
Required data (preliminary with tender):
Item Data Required
Overall skid dimensions (L × W × H) millimetres (mm)
Total operating weight (including all equipment, piping, oil,
kilograms (kg)
gas, but excluding foundation)
Item Data Required
Total erection weight (max lifting weight during installation) kilograms (kg)
Number and location of support points (skid feet) drawing or sketch
Anchor bolt diameter, length, projection, and material (if
millimetres / grade
supplied by vendor)
Anchor bolt hole sizes and locations (centre-to-centre
millimetres / tolerance
dimensions)
Maximum static load per support point (operating and
kN
erection)
Maximum dynamic load (if any – e.g., from compressor kN or statement of
reciprocating forces) negligible
Vibration isolation requirement (anti-vibration pads, spring vendor to state if
mounts, etc.) required
MPa or “E” concrete
Minimum foundation strength requirement (if known)
grade
Skid top of steel elevation (distance from bottom of skid
millimetres
feet to top of skid beams)
Utility connection points (electrical, instrument, process)
millimetres
and their approximate distances from skid edge
Civil scope split:
provide levelling shims (if required), indicate any grouting requirements.
provide anchor bolt embedded templates if bolts are not supplied loose, prepare
foundation surface, grout skid after alignment.
The vendor shall ensure the skid can be aligned and levelled using standard jacking
screws or shims on a flat concrete foundation with anchor bolts cast in.
7. Drawings and documentation
The vendor shall submit for approval and supply as-built copies of all listed documents,
including but not limited to:
Termination Diagrams, Panel Layout, Interconnection Diagrams.
Sheets.
certificates,
Procedures & Reports.
spares
o Confirm whether spare parts are held locally within South Africa (e.g.,
Johannesburg, Cape Town, Durban).
o Provide details of any authorized local representative or agent, including:
➢ Company name
➢ Contact person
➢ Contact details
➢ Scope of support (spares, maintenance, technical support, etc.)
o If not available locally:
➢ Provide contact details of authorized agents and expected lead times for
delivery to site
Documentation to be supplied by vendor for the knock-out drum:
Spare Parts Interchangeability Record (SPIR): The vendor shall provide a
complete SPIR listing all mechanical, electrical, and instrument components with:
spares)
8. Tender documentation deliverables
all equipment, piping (with line sizes and materials), valves, instrumentation (with
tag numbers), and control loops. This must be submitted with the tender.
compressor skid package.
Datasheet provided and submit it as part of the tender documentation.
Datasheet provided and submit it as part of the tender documentation.
Bidders are required to submit a formal declaration regarding compliance with all
the technical specifications stipulated, where the Bidders proposal deviates from
the technical specifications provided:
o A detailed, itemized list of deviations, including:
➢ Description of each deviation
➢ Technical justification
➢ Proposed alternative solution
o Normal delivery (weeks from order)
o Expedited delivery (weeks from order, with additional cost if any)
9. Site establishment
Bidders are to make allowance for the following site requirements:
hazardous area work.
10. Commissioning
The Bidder shall provide commissioning and site start-up support for the complete LPG
reciprocating compressor package, including verification of mechanical, electrical,
instrumentation, and control system performance.
10.1 Commissioning scope (minimum)
Commissioning support shall include (as applicable):
10.2 Commissioning deliverables
forms
11. Training
The vendor shall provide training to PetroSA personnel to ensure safe operation, routine
maintenance, and troubleshooting of the compressor package and its control system.
11.1 Training scope
Training shall cover at minimum:
reset/acknowledgement logic
water pressure/temp, suction/discharge pressure/temp, liquid level knock-out,
overload/trip, if applicable)
mapping)
inspection/replacement guidance)
12. Commissioning & training as tender pricing items
PetroSA requires that bidders clearly price for the following in addition to supply of the
LPG compressor package:
13. Commercial requirements
A mandatory bid clarification meeting will be held (date and time to be advised
separately). All bidders are required to attend to raise technical and commercial queries
regarding this specification.
To assist procurement, vendors shall provide the following commercial breakdown:
Amount (ZAR excl
Item Description
VAT)
1 Compressor skid (complete as per scope)
2 Commissioning spares
Site commissioning & training (3 days incl.
travel/accommodation)
Optional: expedited delivery (if different from
normal)
5 Total (excl VAT)
Scope clarification meeting: 29 May 2026 at 13H00 via Microsoft Teams. Suppliers must confirm attendance by 28 May 2026 at 12H00 by submitting names and email addresses of attendees. Non-attendance will not disqualify tenderers.
Hendson Moleli, Procurement Consultant, Group Supply Chain Management Services, PetroSA. Phone: +27 44 601 2384. Email: [email protected]. Physical Address: Duinzicht Avenue, Mossel Bay 6500, Western Cape. Website: www.petrosa.co.za
Supply and delivery of an LPG gas compressor (two-cylinder) to PetroSA Refinery in Mossel Bay, Western Cape. Suppliers are advised to attend the scope clarification meeting to acquaint themselves with the nature of the supply required and local conditions, as no claims will be entertained once the tender is awarded.
Scope clarification meeting: 29 May 2026 at 13H00 via Microsoft Teams. Suppliers must confirm attendance by 28 May 2026 at 12H00 by submitting names and email addresses of attendees. Purpose: Clarify tender documentation and local conditions. Non-attendance will not disqualify tenderers.
Hendson Moleli, Procurement Consultant, Group Supply Chain Management Services, PetroSA. Phone: +27 44 601 2384. Email: [email protected]. Physical Address: Duinzicht Avenue, Mossel Bay 6500, Western Cape. Website: www.petrosa.co.za
1. A complete copy of the attached sb 4 annexure is required 2. The attached data sheet declarations must be completed and submitted (motor and compressor) 3. A datasheet outlining the brand specification offer must provided, the bid may be eliminated for technical evaluation if the above (2 and 3) are not submitted 4. Technical questions: mr. Bilal ahad at [email protected]
Categories
Request for Bid(Open-Tender)
Duinzicht Avenue - MOSSEL BAY - Mossel Bay -
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Act 53 of 2003
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Relevant because this is a South African public-sector procurement opportunity.
Act 108 of 1996 (s217)
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BULETIN 1.1 AHT0000026799 SUPPLY AND DELIVERY OF LPG GAS COMPRESSOR TWO-CYLINDER TO PETROSA REFINERY IN MOSSELBAY.pdf
PetroSA invites tenders for the supply and delivery of a two-cylinder LPG gas compressor to its refinery in Mossel Bay, Western Cape. A scope clarification meeting is scheduled for May 29, 2026, via Microsoft Teams, and attendance is recommended but not mandatory.
TECHNICAL SPECIFICATION-SCOPE FOR SUPPLY OF COMPRESSOR PACKAGE FOR LPG OFFLOADING.pdf
PetroSA is seeking the supply and delivery of a skid-mounted, electrically driven LPG reciprocating compressor package for LPG offloading at its Mossel Bay refinery. The package must include the compressor, driver, ancillary systems, control panel, and safety features, fully assembled, tested, and ready for site integration. The vendor must also provide commissioning, training, and documentation, with compliance to South African regulatory and certification standards (e.g., SANS, Ex, PER). The compressor must handle a maximum discharge flow of 50m³/hr and meet hazardous area (Zone 2) requirements.
COMPRESSOR PACKAGE DATASHEET.pdf
Electrical Datasheet Low Voltage Motor 51kr101A002.pdf
COMPRESSOR MASTER SPECIFICATION (1).pdf
To download these documents and access AI-powered analysis, visit the main tender page.
Date & Time
Wednesday, 10 June 2026 - 12:00
Venue
null
03 Jun
2026
Tender Published
Tender was published
10 Jun
2026
Closing Date
Tender closing date
PetroSA is South Africa's national oil company, engaged in gas and petroleum exploration and production.
Matched by category & region
Components (as a minimum):
o Main Isolator: A lockable, load-breaking isolator switch, rated for the full load
current (FLC) and short-circuit capacity.
o Motor Starter: Direct-On-Line (DOL) as required by motor size. Starter shall
include:
▪ Contactor: Rated for frequent LPG duty.
▪ Overload Relay: Solid-state, adjustable, with phase loss protection. Set
point adjustable from 100-125% of motor FLC.
▪ Short-Circuit Protection: Current-limiting circuit breakers
o Control Devices:
▪ Start/Stop Pushbuttons: Guarded or flush-mounted as appropriate.
▪ Trip Reset Button.
o Indications: LED pilot lights with engraved legends:
▪ Green: Power On
▪ Green: Motor Running
▪ Red: Motor Stopped
▪ Amber: Motor Tripped
o Internal Wiring: All wiring shall be numbered, routed in trunking, and use
tinned copper conductors. Separate compartments or segregation shall be
provided for AC power, DC instrument power, and signal wiring.
o Termination: External power and signal cables shall terminate in certified ex-
rated cable glands. Internal terminal blocks shall have 20% spare capacity. A
dedicated, labelled earthing bar shall be provided.
4.4 Local Control PaneI (Instrumentation & Control System Interface
section)
powered from 24V DC.
20mA, All binary (discrete) signals shall be volt-free contacts (dry contacts) for
outputs.
PLC. Note: PetroSA has standardized on Rockwell PLC systems.
mounted on the skid for all external signals to the plant DCS/ESD. This JB shall
be the demarcation point between package and plant cabling. Internal wiring
from the control panel to this JB is within the vendor's scope.
1⁄2” npt.
commissioning, Training (Maintenance and Operator) and Site Acceptance testing
(SAT). Maintenance of compressor should be handed over to PetroSA maintenance
team. The compressor maximum discharge flow to be 50m3/hr.
African Accredited Inspection Authority (IA).
range includes 525Vac.
phase or 3 phase + neutral arrangement.
4.2 Electric Motor Technical specifications
environment.
show the hazardous area certification mark.
specified electric induction motor via a V-belt drive system.
ensure reliable starting of the compressor under unloaded conditions (with the
compressor's unloading mechanism, e.g., the four-way valve, in the unload
position) across the full specified range of suction pressures and gas
compositions.
accumulation of static electricity and shall be certified as suitable for use in the
specified Zone 2 hazardous area. Belt material and construction shall be oil-
resistant where exposed to the environment.
be constructed of non-sparking material (e.g., painted mild steel, aluminum with
non-sparking coating) and designed to allow for safe ventilation while preventing
access to moving parts during operation. The guard shall be easily removable for
maintenance.
4.3 Local Control Panel (Motor Starter Panel Section)
powder coat finish. Material selection is subject to final approval based on
corrosion resistance requirements.
arrangement shall be certified for a Zone 2 installation.
Approved Inspection Authority (AIA) shall be provided for the vessel.
5.2 Piping within skid:
appropriate
(316L/graphite) and B7 studs/2H nuts
6. Civil works requirements (petrosa responsibility)
reciprocating compressor package, including verification of mechanical, electrical,
instrumentation, and control system performance.
10.1 Commissioning scope (minimum)
Commissioning support shall include (as applicable):
10.2 Commissioning deliverables
forms
reset/acknowledgement logic
water pressure/temp, suction/discharge pressure/temp, liquid level knock-out,
overload/trip, if applicable)
mapping)
inspection/replacement guidance)
Table of Contents ......................................................................................................... 1
1. Scope of supply ............................................................................................. 2
2. Applicable standards .................................................................................. 2
3. Hazardous area classification requirements.................................... 3
4. Electrical / control systems requirements ...................................... 3
5. Mechanical requirements and specifications .................................... 9
6. Civil works requirements (petrosa responsibility) ....................... 10
7. Drawings and documentation ................................................................. 12
8. Tender documentation deliverables ................................................... 13
9. Site establishment ...................................................................................... 14
10. Commissioning ........................................................................................... 14
11. Training ....................................................................................................... 15
12. Commissioning & training as tender pricing items ....................... 15
13. Commercial requirements ................................................................... 16
14. Appendix ...................................................................................................... 17
1. Scope of supply
package for LPG offloading from road tankers. The package shall include the
compressor, driver, all ancillary systems, and a fully integrated control panel with
motor starting and control systems interface, pressure safety valve and air cooler.
Please ensure that the compressor package proposed for offloading LPG (Liquefied
Petroleum Gas) from a road tanker into a storage tank complies with the following
mandatory standards and certifications.:
handling flammable gases.
selection, installation, inspection, and maintenance of Ex-certified equipment).
Required Certifications (to be supplied with the package):
IECEx / IA certificate).
relevant pressure equipment certification in accordance with SANS 347 (if
applicable).
package.
panel, junction boxes, cable glands, and switches, shall be certified and suitable for
use in a Zone 2 hazardous area. The selected Ex protection types shall be clearly
stated and certified by an approved body. All equipment must comply with IEC
60079 series and relevant SANS standards.
o Binary Output to PetroSA – Compressor Running Status (51ML3020)
o Binary Output to PetroSA – General Trip (51XA3022)
o Binary Input from PetroSA – ESD Status (51XL3011). External Interlock:
One common permissive signal -System Ready (External Interlocks
Cleared), Loss of 24V DC = Trip/Prevent Start.
The ESD Status signal (tag 51XL3011) shall be indicated on the local control
panel via a green LED-type pilot light. The pilot light shall be fitted with an
engraved legend clearly identifying the function.
Green: ESD Healthy
Red: ESD Tripped
following via the local control panel including LED pilot lights (amber) with
engraved legends, audible horn, and control buttons.:
o Lube Oil Pressure Low (Alarm & Trip)
o Cooling Water Pressure Low (Alarm & Trip)
o Cooling Water Temperature High (Alarm)
o Liquid Level in Knock-Out Pot High (Alarm & Trip)
o Gas Suction Pressure Low (Alarm & Trip)
o Gas Discharge Pressure High (Alarm & Trip)
o Gas Discharge Temperature High (Alarm & Trip)
o Motor overload (Alarm & Tripped)
Spare Parts Interchangeability Record (SPIR): The vendor shall provide a
complete SPIR listing all mechanical, electrical, and instrument components with:
spares)
all equipment, piping (with line sizes and materials), valves, instrumentation (with
tag numbers), and control loops. This must be submitted with the tender.
compressor skid package.
hazardous area work.
site power, process piping, and the main plant control system.
stated South African regulatory and certification standards.
Area Classification: Zone 2 Gas Group: IIA Temperature Class: T2
4.1 Basic Electrical Design Data Service: LPG Vapour Recovery / Tanker Offloading Drive: Electric Motor with V-belt Drive Power Supply: 525V AC, 3-Phase, 50Hz PetroSA will provide 525 Vac, 50 Hz power supply to the LPG compressor skid.
o Compressor Suction Pressure (51PT3001) o Suction K.O Drum Level (51LT3001) o Compressor Discharge Pressure (51PT3002) o Compressor Discharge Temperature (51TT3001) (Note: If transmitters are not supplied by vendor, the required tapping points in the process lines should be provided. Final approval shall be obtained before the procurement of any instruments associated with the package.
51PT3001 51LT3001 51PG3002 51PXSLL3003 51PG3002 51PXSHH3004 51TXSHH3002 51LXSHH3002 Local Panel: (Signals To/From ESD) 51-KR101 51ML3020 HH 51XA3022 51-VD301 H H Comp Gen Trip Alarm to ESD32 51PT3002 51TT3001 Pos 1 Pos 2 51PXSLL3005 To DCS To DCS ESD3251XL3011TRIP LTG Trnf (Comp Rdy to Strt) 51HV3018 51OV3013 51OV3012 51HXV1707 51 ESD 30
5.1 Knock-Out Drum (Suction Pot) purpose is to prevent liquid LPG carry-over from entering the compressor. Design pressure 2400 kPa (min) / Vendor to state Design temperature -45°C to 65°C (min range) Carbon steel (ASTM A516 Gr 70 or equivalent) suitable for LPG service Corrosion allowance 3 mm (minimum) To be sized for adequate liquid holdup (vendor to Internal volume calculate based on expected liquid carry-over). Minimum 50 litres recommended. Drain connection 1" NB valve at bottom (manual drain valve supplied) Hydrostatic test Per design code – certificate required
Design Code: The knock-out drum shall be designed, manufactured, tested, and stamped in accordance with:
foundation to be provided by PetroSA. To enable PetroSA’s civil engineer to design the foundation, the vendor shall provide the following information as part of the tender submission (preliminary) and final detailed submission after order placement: Required data (preliminary with tender): Overall skid dimensions (L × W × H) millimetres (mm) Total operating weight (including all equipment, piping, oil, kilograms (kg) gas, but excluding foundation) Total erection weight (max lifting weight during installation) kilograms (kg) Number and location of support points (skid feet) drawing or sketch Anchor bolt diameter, length, projection, and material (if millimetres / grade supplied by vendor) Anchor bolt hole sizes and locations (centre-to-centre millimetres / tolerance dimensions) Maximum static load per support point (operating and kN erection) Maximum dynamic load (if any – e.g., from compressor kN or statement of reciprocating forces) negligible Vibration isolation requirement (anti-vibration pads, spring vendor to state if mounts, etc.) required MPa or “E” concrete Minimum foundation strength requirement (if known) grade Skid top of steel elevation (distance from bottom of skid millimetres feet to top of skid beams) Utility connection points (electrical, instrument, process) millimetres and their approximate distances from skid edge
including but not limited to:
the technical specifications stipulated, where the Bidders proposal deviates from the technical specifications provided: o A detailed, itemized list of deviations, including: ➢ Description of each deviation ➢ Technical justification ➢ Proposed alternative solution
maintenance, and troubleshooting of the compressor package and its control system.
A mandatory bid clarification meeting will be held (date and time to be advised separately). All bidders are required to attend to raise technical and commercial queries regarding this specification.
VAT) 1 Compressor skid (complete as per scope) Site commissioning & training (3 days incl. travel/accommodation) Optional: expedited delivery (if different from normal) 5 Total (excl VAT)
Sets the constitutional standard for fair, equitable, transparent, competitive and cost-effective public procurement.
Relevant because this is a South African public-sector procurement opportunity.
Act 5 of 2000
Covers preferential procurement and preference-point systems used in public tenders.
Relevant because this is a South African public-sector procurement opportunity.
Act 12 of 2004
Supports anti-corruption controls and supplier integrity in procurement processes.
Relevant because this is a South African public-sector procurement opportunity.
Act 28 of 2024
Provides the national framework for public procurement across government.
Relevant because this is a South African public-sector procurement opportunity.
Act 2 of 2000
Supports access to tender records, award decisions and public-sector procurement information.
Relevant because this is a South African public-sector procurement opportunity.
Act 3 of 2000
Supports lawful, reasonable and procedurally fair administrative tender decisions.
Relevant because this is a South African public-sector procurement opportunity.
Address
Duinzicht Avenue - MOSSEL BAY - Mossel Bay -
Source confidence
High source confidence
Official source
eTenders.gov.za
Documents found
5
Last checked
03 Jun 2026
AI status
Enhanced
Data conflicts
None detected
This tender has strong source evidence, including source metadata and supporting tender information synced from the government tender portal.
Tenders SA is not the issuing authority. All tenders are automatically synced from the official government tender portal. Always confirm final submission details, closing dates, briefing sessions, eligibility requirements, and documents on the official government portal before applying.
Key Personnel
Provinces Active
Industries
Median Estimate
R 462 218
Range
Based on 10 comparable awarded tenders. Companies with similar profiles typically bid near the median.
* Estimates are based on historical data and do not guarantee actual award values.
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