Submerged arc welded steel pipe and its standard classification: spiral submerged arc welded steel pipe (SY5036-83) for pressure fluid transportation is mainly used for conveying oil and natural gas pipelines; spiral high frequency welded steel pipe for pressure fluid transportation (SY5038-83) ), spiral high-frequency welded steel pipe welded by high-frequency lap welding for pressure fluid transportation. The steel pipe has strong pressure bearing capacity and good plasticity, which is convenient for welding and processing. Generally, the spiral submerged arc welded steel pipe (SY5037-83) for low-pressure fluid transportation is made of water by double-sided automatic submerged arc welding or single-sided welding. Submerged arc welded steel pipe for general low pressure fluid transportation such as gas, air and steam.
The common standards for submerged arc welded steel pipes are generally divided into: SY/T5037-2000 (partial standard, also called spiral seam submerged arc welded steel pipe for ordinary fluid conveying pipeline), GB/T9711.1-1997 (national standard, also called oil and gas) Industrial conveying steel pipe delivery technical conditions Part I: Class A steel pipe (to the current strict requirements GB/T9711.2 Class B steel pipe)), API-5L (American Petroleum Institute, also known as pipeline steel pipe; which is divided into PSL1 and PSL2 Two grades), SY/T5040-92 (spiral submerged arc welded steel pipe for piles).
The common standards for submerged arc welded steel pipes are generally divided into: SY/T5037-2000 (partial standard, also called spiral seam submerged arc welded steel pipe for ordinary fluid conveying pipeline), GB/T9711.1-1997 (national standard, also called oil and gas) Industrial conveying steel pipe delivery technical conditions Part I: Class A steel pipe (to the current strict requirements GB/T9711.2 Class B steel pipe)), API-5L (American Petroleum Institute, also known as pipeline steel pipe; which is divided into PSL1 and PSL2 Two grades), SY/T5040-92 (spiral submerged arc welded steel pipe for piles).
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