Spiral seam submerged arc welded steel pipe SY5036-83 for pressurized fluid transportation is mainly used for pipelines for transporting oil and natural gas; spiral seam high frequency welded steel pipe SY5038-83 for pressurized fluid transportation is welded by high frequency lap welding. Spiral seam high frequency welded steel pipe for pressurized fluid transportation. The steel pipe has strong pressure bearing capacity and good plasticity, which is convenient for welding and processing. Generally, the spiral seam submerged arc welded steel pipe SY5037-83 for low-pressure fluid transportation is made of double-sided automatic submerged arc welding or single-sided welding for water, gas, Submerged arc welded steel pipes for general low pressure fluid transportation such as air and steam.
The commonly used standards for spiral steel pipes are generally divided into: SY/T5037-2000 (Ministry Standard, also known as spiral seam submerged arc welded steel pipes for ordinary fluid pipelines), GB/T9711.1-1997 (National Standard, also known as oil and gas industry transportation steel pipes) The first part of technical delivery conditions: Grade A steel pipes (GB/T9711.2 Grade B steel pipes are strictly required), API-5L (American Petroleum Institute, also known as pipeline steel pipes; which are divided into PSL1 and PSL2 grades), SY/T5040-92 (spiral seam submerged arc welded steel pipe for piles).
