Gazprom expects deepwater firsts for Black Sea gas pipeline

Gazprom has held a meeting with Russian pipe manufacturers concerning requirements for the South Stream pipeline project.

Offshore staff

MOSCOW – Gazprom has held a meeting with Russian pipe manufacturers concerning requirements for the South Stream pipeline project.

This will provide a new route for supplies of Russian gas to Europe, with part of the pipeline crossing the southern part of the Black Sea.

According to Gazprom,South Stream will be the first offshore gas pipeline construction project anywhere to feature pipes with a 39-mm (1.5-in) wall thickness designed for an operating pressure of 27.73 MPa (4,022 psi). Additionally, it claims, the water depth of up to 2,250 m (7,382 ft) will be a record for installation of 32-in. diameter pipes.

Participants at the meeting discussed results of tests on experimental large diameter pipe batches designed for South Stream’s offshore section. The results and production specifications were verified by DNV, confirming the feasibility of their production and application during the offshore pipelay.

There were further discussions on the possibilities of creating large-diameter Х100-Х120 pipes to withstand operating pressure more than 11.8 MPa (1,711 psi) with reduced metal consumption; threaded pipes with leak-proof thread for offshore and onshore gas production; and pipeline fasteners of up to 56-in. diameter for operating pressure of up to 28.45 MPa (4,126 psi).

1/25/2013

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