We are constructing a pipeline which will operate at around 1000 psig. The gas will contain 1000 ppm to 4000 ppm H2S in natural gas. I have a chart that indicates the line should be constructed to NACE Plus. What is NACE Plus? I have done plant construction to NACE. However, I have not done pipeline construction to the extent of stress relieving welds. Is stress relieving typical for pipelines. Can X-42 pipe conform to NACE MR-0175?
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