Spiral submerged arc welded steel pipes for pressure - bearing fluid transportation SY5036 - 83 are mainly used for pipelines for transporting petroleum and natural gas; Spiral seam high - frequency welded steel pipes for pressure - bearing fluid transportation SY5038 - 83 are spiral seam high - frequency welded steel pipes for pressure - bearing fluid transportation welded by the high - frequency lap welding method. These steel pipes have strong pressure - bearing capacity, good plasticity, and are convenient for welding and processing and forming; General spiral submerged arc welded steel pipes for low - pressure fluid transportation SY5037 - 83 are submerged arc welded steel pipes for general low - pressure fluid transportation such as water, gas, air, and steam, which are made by double - sided automatic submerged arc welding or single - sided welding method.
The common standards for spiral steel pipes are generally divided into: SY/T5037 - 2000 (ministry standard, also called spiral submerged arc welded steel pipes for ordinary fluid transportation pipelines), GB/T9711.1 - 1997 (national standard, also called Technical Conditions for Delivery of Steel Pipes for Petroleum and Natural Gas Industry - Part 1: Grade A Steel Pipes (there are more strict requirements for GB/T9711.2 Grade B Steel Pipes)), API - 5L (American Petroleum Institute, also called pipeline steel pipes; which are divided into two levels of PSL1 and PSL2), SY/T5040 - 92 (spiral submerged arc welded steel pipes for piles)
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Time：2024-07-23
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