Objectives

The primary objective is to supply and install fully functional wastewater pump systems at the Alrode and Witbank Transnet Pipelines facilities. The project aims to safely and efficiently discharge wastewater from spill basins and oil separators into municipal sewer lines, replacing outdated or temporary installations with compliant, durable, and integrated mechanical, electrical, and civil systems that meet strict safety and environmental standards.

Scope of Work

The contractor will manage the end-to-end execution of the installation, encompassing procurement, fabrication, factory testing, delivery, excavation, welding, installation, commissioning, and quality assurance. Key deliverables include:

• Alrode Station: Install a new pump and motor set on an existing skid, route approximately 200 metres of 3-inch piping to a municipal sewer manhole, modify or relocate site obstructions (vehicle/pedestrian gates, fire emergency boxes, clear-view fencing), construct load-bearing drainage channels with heavy-duty grating, and connect via underground HDPE piping.
• Witbank Station: Replace a temporary flexible piping setup with permanent galvanised steel piping, construct a new reinforced concrete manhole with HDPE lining and sewer tie-ins, cast new bund floors and walls, and install a new pump set targeting a flow rate of approximately 20 m³/h.
• Electrical & Instrumentation: Upgrade motor controls, install explosion-proof motors, implement local start-stop stations, conduct pressure and functional testing, and issue supplementary electrical compliance documentation.

Technical Requirements

The project demands strict adherence to multi-disciplinary engineering standards and integrated execution:

• Piping & Mechanical: Smallbore galvanised steel piping with screwed, flanged, or threaded joints; cantilever wall supports; isolation, check, and gate valves; and HDPE-to-steel transition adaptors. All piping must undergo pressure testing and comply with ASME B31.3 and API standards.
• Electrical: Motors must be Ex ‘d’ (explosion-proof), IP55 rated, T4 temperature class, powered via direct online control using existing Low Voltage Motor Control Centre (LV MCC) buckets. Cable sizing, earthing, and bonding must comply with SANS 10142-1 and SANS 60079-14. Factory and Site Acceptance Tests (FAT/SAT) are mandatory.
• Civil & Structural: Excavation, G5 soil compaction, reinforced concrete foundations (25 MPa strength), HDPE waterproofing liners, cementitious slurry application, and casting of bund structures capable of supporting heavy vehicle loads.
• Quality & Compliance: Implementation of a Quality Control Plan (QCP), Non-Destructive Testing (NDT) where specified, post-installation inspections, and full compliance with the Occupational Health and Safety Act, Water Services Act, municipal by-laws, and Transnet Pipelines internal engineering standards.

Skills & Experience Requirements

Contractors must demonstrate proven capability in complex industrial installations within active petroleum storage environments. Required competencies include:

• Qualified mechanical, electrical, and civil engineers with experience in smallbore piping, pump systems, and hazardous area classifications.
• Certified welders and fabricators proficient in galvanised steel and HDPE joining techniques.
• Electrical specialists experienced in Ex ‘d’ motor installations, LV MCC integration, and SANS-compliant cabling and certification.
• Project management expertise covering procurement, site logistics, SHE compliance, and commissioning protocols.
• Familiarity with API, ASME, SANS, and Transnet Pipelines technical standards.

Key Technical Terms Explained

• Ex ‘d’ Rated Motor: An explosion-proof electric motor designed to contain internal ignitions and prevent external flammable vapours from entering, essential for petroleum facility safety.
• FAT / SAT: Factory and Site Acceptance Tests—formal verification procedures to confirm equipment performance and installation integrity before handover.
• Supplementary CoC: A legally mandated Certificate of Compliance for low-voltage electrical installations, certifying adherence to SANS 10142-1 safety standards.
• G5 Compaction: A standardized earthworks compaction method ensuring stable, load-bearing ground conditions for structural elements like grating channels.
• HDPE Moulded Flange Adaptor: A precision-engineered connector that securely joins dissimilar pipe materials (e.g., steel to HDPE) while maintaining a leak-proof seal.