API(American Petroleum Institute),API 5L Line Pipe,API 5D

The American Petroleum Institute, commonly referred to as API, is the largest U.S trade association for the oil and natural gas industry.[......]

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API oil pipes

OTCG pipes for conveying gas, water and petroleum
The American Petroleum Institute, commonly referred to as API, is the largest U.S trade association for the oil and natural gas industry. It claims to represent about 400 corporations involved in production, refinement, distribution, and many other aspects of the petroleum industry.[......]

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