The Design, Supply and Installation of Concrete Block Valve Lids, External Locking Mechanism and 90° Output Gearboxes (vertical Drive) as Part of the Modification of the Existing Gearboxes

TPL/2024/03/0004/59257/RFP

2025-08-27 10:00

Tender Closed on: 2025-09-17 14:00

Transnet SOC Ltd

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Title: CONCRETE BLOCK VALVE LIDS, EXTERNAL LOCKING MECHANISM AND 90° OUTPUT GEARBOXES (VERTICAL DRIVE)
Tender Number: TPL/2024/03/0004/59257/RFP
Description: The design, supply and installation of Concrete Block Valve Lids, External Locking Mechanism and 90° output gearboxes (vertical drive) as part of the modification of the existing gearboxes
Closing Date: 2025-09-17 14:00
Briefing Date: 2025-08-27 10:00
Briefing Date Details: A Non-Compulsory Tender Clarification Meeting will be conducted on Microsoft Teams on the 27th of August 2025, at 10:00 am for a period of ± 2 hours. The briefing session will start punctually, and information will not be repeated for the benefit of Respondents arriving late. Bidders are required to confirm their attendance and to send their contact details to the following email address: [email protected] Bidders may use meeting details below to login. Meeting Details Meeting ID: 377 747 196 017 7 Passcode: bA3gH7uw
Tender Type: RFP
Contact Person: Hlekane Maringa Transnet Pipelines Durban
Contact Person Email: [email protected]
Location Of Service: Nation Wide
Name Of Institution: TPL
Tender Category: Goods & Services

Tender Summary

Objectives

The primary objective of this tender is to design, supply, and install reinforced concrete valve lids, external locking mechanisms, and modify gearboxes with 90° output drives (vertical drive) for existing block valve chambers. The project aims to enhance security, safety, and operational accessibility of pipeline block valve chambers by preventing unauthorized access, enabling external valve operation, and ensuring compliance with safety standards.

Scope

The scope encompasses multiple phases and detailed activities, including:

  • Phase 1A: Design, fabrication, and installation of reinforced concrete slabs within existing lids, modification of lids to accommodate external locking mechanisms, ensuring resistance against forced entry and intrusions.
  • Phase 1B: Design, fabrication, and installation of external locking mechanisms with removable keys, based on latest market technology, to allow remote locking/unlocking from outside chambers.
  • Phases 2A & 2B: Removal of existing steel lids, design and installation of new reinforced concrete lids with built-in locking mechanisms, and modification of gearboxes with 90° output drives, extended spindles, and universal T-piece keys for external operation.
  • Design and installation of hatch covers with specified dimensions, corrosion resistance, and locking features.
  • Site inspections, measurements, and safety compliance activities across pipeline sites, with phased implementation over an 18-month period.

Technical Requirements

The technical requirements include:

  • Use of materials complying with latest SABS standards, with concrete strength of at least 35 MPa for slabs and 60 MPa for hatch castings.
  • Design of reinforced concrete slabs to fit within existing lids, with precise measurements and structural integrity.
  • External locking mechanisms designed with the latest technology, corrosion-resistant, lockable from outside, and operable without entering chambers.
  • Gearbox modifications featuring 90° vertical drives, with 1:1 ratio, extended spindles, API 6D rating, and universal T-piece keys for external valve operation.
  • Use of certified lifting equipment (e.g., 13.5-ton truck-mounted cranes) operated by certified personnel for installation activities.
  • Compliance with relevant standards including SANS 10100, 10160, 10144, 1200, and safety regulations.
  • Provision of detailed design, fabrication, installation, testing, and certification documentation, including as-built drawings and safety certificates.
  • Implementation of safety, health, and environmental management plans, including fire standby services and confined space procedures.
  • Phased project schedule with completion targeted within 18 months, including detailed activity and risk management plans.
This summary is AI generated. Download the tender documents for all the information.

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