Dear colleagues in the offshore oil industry, I would like to ask some questions regarding the classification of industrial pipelines.
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The main natural gas pipeline is classified as GC2 grade, and the diameter of its branch pipes is <50 mm. Do these branch pipes also belong to the GC2 grade, or do they not qualify as pressure pipelines? Please help, thank you!
Those with branch pipe diameters < 50 mm are not included
The first isolation valve of the branch pipe connected to the main pipe is closed. That is, the section of the branch pipe located before the valve, where it connects to the main pipe, falls under the scope of supervision for pressure pipelines.