The PetroSA South Coast Development Project was sub-contracted to one of the world’s largest subsea engineering and construction contractors – Subsea 7 – and Belmet Marine secured the contract for the fabrication of, amonst other items, seven subsea manifold structures.

The seven structures were fabricated to EEMUA 158, BS 4515-1, BS 4515-2 and BSEN 1435 specifications with 100% Ultra Sound Testing on all primary structure welds.  The welds defect percentage was 0.067% for the Structural fabrication, 0.031% for Duplex HP piping and 3.0% for small diameter Carbon steel HP piping which is well below international standards.  The tight delivery of the structures to Cape Town harbour for load-out to Mossel Bay was easily achieved with the CNC Pipe Cutting machine being utilized to cut all structural pipes to AWS D1.1 fit-ups and weld bevels, including all intersections for exact fit-up, thereby ensuring a constant flow of material to the shop floor.  The structures were transported from Bellville directly to the harbour during November 2006 to await the load-out that commenced in mid-January 2007.  The project was completed without injury and within the budget.

As the project progressed and Subsea 7 identified with Belmet Marine’s sound fabrication capabilities, further fabrication work was awarded to Belmet – this included Tie-In Spool pre-fabrication of Tee Protection Structures and on-site fabrication (metrology) of Tie-In Spools in Mossel Bay.

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