Confined fluid transport, using spiral submerged arc welded steel pipe SY5036-2000, mainly used to transport oil and natural gas pipelines;
Spiral seam high-frequency welded steel pipe SY5038-2000 for pressure fluid conveying, spiral high-frequency welded steel pipe for high-pressure lap welding. The steel pipe has strong pressure bearing capacity and good plasticity, which is convenient for welding and processing;
General low-pressure fluid transportation, submerged arc welded steel pipe for general low-pressure fluid transportation such as water, gas, air and steam, which is made by double-sided automatic submerged arc welding or single-side welding using spiral submerged arc welded steel pipe SY5037-2000.
The common standards for spiral steel pipes are generally divided into: SY/T5037-2008 (partial standard, also called spiral seam submerged arc welded steel pipe for ordinary fluid conveying pipeline), GB/T9711.1-2008 (national standard, also called oil and gas industry transportation) Technical requirements for steel pipe delivery Part I: Class A steel pipe (to the current strict requirements GB/T9711.2 Class B steel pipe)), API-5L (American Petroleum Institute, also called pipeline steel pipe; which is divided into PSL1 and PSL2 Level), SY/T5040-2008 (spiral welded steel pipe for piles).
SY/T5037-2008 is the standard set by the Ministry of Petroleum.
GB/T9711.1-2008 National Spiral Pipe, Oil and Gas Industry Transportation Steel Pipe, Class A
Generally, spiral high-frequency welded steel pipe (SY5039-2000) for low-pressure fluid transportation is a hot-rolled steel strip coil for tube blank, which is often spiral-formed by high-frequency lap welding and used for high-pressure fluid conveying. Frequency welded steel pipe.
Spiral welded steel pipe for piles (SY5040-2000) is made of hot-rolled steel strip coils, often spiral-formed by double-sided submerged arc welding or high-frequency welding, used for civil engineering structures, wharfs and bridges. Steel pipes for foundation piles.
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