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The purpose of this specification is to provide standards for pipe suitable for use in conveying gas, water, and oil in both the oil and natural gas industries. This specification covers welded steel line pipe. It includes plain-end, threaded-end, and belled-end pipe, as well as through-the-flow line (TFL) pipe and pipe with ends prepared for use with special couplings. Although the plain-end line pipe meeting the specification is primarily intended for field makeup by circumferential welding, the manufacturer will not assume responsibility for field welding.

This International Standards specifies requirement for the manufacturing of two product specification levels (PSL 1 and PSL 2) of seamless and welded steel pipes for use in pipeline transportation systems in the petroleum and natural gas industries. This International Standard is not applicable to cast pipe.

This International Standard specifies the technical delivery conditions for steel pipes (casing, tubing, plain-end casing liners and pup joints), coupling stock and accessories and establish requirement for two Product Specification Levels (PSL – 1 & PSL – 2). These steel pipes are use as casing or tubing for well in the petroleum and natural gas industries.

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