Application of New Type High Temperature and Pressure Submarine Flexible Pipe
In the process of conveying medium,the internal pressure sheath of the submarine flexible pipe is directly in contact with the conveying medium,and its performance is one of the key factors affecting the life and service performance of the whole hose.For submarine hoses that need to transport high temperature medium,the internal pressure sheath using conventional high-density polyethylene(HDPE)material can not guarantee the safety of the pipeline,and polyvinylidene fluoride(PVDF)plastic has high temperature resistance,but its expensive.In response to this situation,cross-linked polyethylene(XLPE)was firstly used as the internal pressure sheath for submarine flexible pipes in China to solve the problem of high temperature and pressure(design temperature 90℃,design pressure 18.4 MPa),and was successfully applied in a development project of a block of Kenli Oilfield.Compared with conventional HDPE,XLPE internal pressure sheath has achieved excellent effects in improving temperature resistance,comprehensive performance and saving project costs of submarine flexible pipes.
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