X65 Steel Pipe Successfully Laid In China Deepwater Gas Area

Offshore, polar, and deepwater oil and also gas areas face rough solution problems such as wave, present, as well as salt water rust, which call for higher quality needs than onshore pipelines, and also subsea oil and also gas pipelines generally have solution durations of greater than two decades, calling for the use of high-performance pipe steel. DNV-OS-F101 Seabed Pipe Requirements has rigorous needs on the transverse strength, longitudinal strength, low-temperature dynamic tear resistance, weldability, strain resistance and also acid tool corrosion resistance of submarine pipeline steel.

offshore pipeline laying

The lengthiest offshore pipeline on the planet is the Langeled gas pipe, which was laid between Norway and also Causation from 2004 to 2007, with a size of 1173km and also the inmost point is 2775m. right here are overseas pipeline design in recent years:

On May 23, 2020, the sea pipe of the Lingshui 17-2 task, China's first deepwater gas field, was successfully laid at 1,532 meters, damaging China's brand-new document for sea pipe laying and the very first procedure at 1,500 meters of "ultra-deepwater". The task utilized greater than 10,000 lots of undersea steel pipe from Henggang, Hunan district. The simulation experiments of the outside stress of these deep-sea pipes reveal that the steel tube can withstand 35Mpa and also can be made use of for exterior stress above 35m water deepness.

The wldsteel inc. deepwater steel pipe is defined by huge wall density about outer size ratio, high dimensional precision, etc. This is since the submarine pipe has been in solution in the marine setting of low temperature, high stress and strong deterioration for a long time. It not just bears a lots of interior as well as external stress, axial force and also bending minute however also bears the vibrant tons of rotating external pressure, wave and current. The toughness, wall surface density, and also measurement satiation of steel pipe are specifically important to avoid pipeline damage. Meanwhile, with the continuous rise of pipe laying depth and also conveying pressure, high steel grade, huge pipeline size, and huge wall surface density are the growth fad for the overseas pipe.