Steel-lined PTFE pipes – Issues regarding the determination of pressure pipe inspection grades

2012-01-06View Original

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Steel-lined PTFE pipe, sodium hypochlorite solution, pressure of 0.3 MPa, normal temperature. A steel-lined PTFE pipe is used; this pipe is classified as a GC2 pressure pipe, with a pressure pipe inspection grade of IV. But the problem now is that some radiographic testing methods specified for Grade IV seem not to be applicable to steel-lined PTFE pipes with flange connections; so how should their pressure pipeline inspection grade be defined?

Reply #22012-04-18

Wow, the manufacturing process of steel-lined PTFE pipes follows the standards for pressure pipeline components; once installed, it’s sufficient to provide relevant documentation, and no on-site inspection is required

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Steel-lined PTFE pipes – Issues regarding the determination of pressure pipe inspection grades

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