Manufacturer produces spiral steel pipes, water supply coated spiral steel pipes, 3pe anti-corrosion spiral steel pipes

Description :

　　 Execution standard for spiral tube: 1. Spiral seam submerged arc welded steel pipe (SY5036-83) for pressurized fluid transportation is a spiral seam steel pipe made of hot-rolled steel strip coil as the pipe blank, formed by constant temperature spiral, welded by double-sided submerged arc welding method, and used for pressurized fluid transportation. Steel pipes have strong pressure bearing capacity and good welding performance. After various rigorous scientific inspections and tests, they are safe and reliable to use. The steel pipe has a large diameter, high conveying efficiency, and can save investment in laying pipelines. Mainly used for pipelines transporting oil and natural gas. 2. Spiral seam high-frequency welded steel pipe for pressurized fluid transportation (SY5038-83) is a spiral seam high-frequency welded steel pipe used for pressurized fluid transportation, which is made of hot-rolled steel strip coil as the pipe blank, formed by constant temperature spiral forming, and welded by high-frequency lap welding method. Steel pipes have strong pressure bearing capacity, good plasticity, and are easy to weld and process into shapes; After various strict and scientific inspections and tests, it is safe and reliable to use, with large steel pipe diameters, high conveying efficiency, and can save investment in laying pipelines. Mainly used for laying pipelines for transporting oil, natural gas, etc. 3. Spiral seam submerged arc welded steel pipes (SY5037-2000) for general low-pressure fluid transportation are made of hot-rolled steel strip coils as pipe blanks, spiral formed at high temperatures, and made using double-sided automatic submerged arc welding or single-sided welding methods. They are used for submerged arc welded steel pipes for general low-pressure fluid transportation such as water, gas, air, and steam. Spiral steel pipe is a spiral seam steel pipe made of strip steel coil as raw material, often formed by warm extrusion, and welded by automatic double wire double-sided submerged arc welding process Main production process (1) Raw materials include strip steel coils, welding wire, and flux. Strict physical and chemical tests must be conducted before investment. (2) The head and tail of the strip steel are connected by single or double wire submerged arc welding, and automatic submerged arc welding is used for repair welding after being rolled into a steel pipe. (3) Before forming, the strip steel undergoes leveling, trimming, planing, surface cleaning, conveying, and pre bending treatment.

　　 Spiral pipe, also known as spiral steel pipe or spiral welded pipe, is made by rolling low-carbon structural steel or low-alloy structural steel strip into a pipe blank at a certain angle of the spiral line (called forming angle), and then welding the pipe seam together. It can produce large-diameter steel pipes with narrower strip steel.

　　Common standards for spiral pipes: SY/T5037-2000 (departmental standard, also known as spiral seam submerged arc welded steel pipes for ordinary fluid transportation pipelines), GB/T9711.1-1997 (national standard, also known as technical delivery conditions for oil and gas industry transportation steel pipes: Grade A steel pipes (GB/T9711.2 Grade B steel pipes with strict requirements)), API-5L (American Petroleum Institute, also known as pipeline steel pipes); It is divided into two levels: PSL1 and PSL2. SY/T5040-92 (spiral seam submerged arc welded steel pipes for piles).

　　Spiral seam submerged arc welded pipe for pressurized fluid transportation: mainly used for pipelines transporting oil and natural gas. Steel pipes have strong pressure bearing capacity, good plasticity, and are easy to weld and process into shapes; Spiral seam submerged arc welded steel pipes for general low-pressure fluid transportation: Submerged arc welded steel pipes made by double-sided automatic submerged arc welding or single-sided welding method for general low-pressure fluid transportation such as water, gas, air, and steam.

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• Coated spiral steel pipe