Manufacturer of L290 gas anti-corrosion spiral steel pipe for drainage pipeline

Description :

　　 Spiral steel pipe products use Lincoln welding machines from the United States for fully automatic double-sided submerged arc welding. The spiral steel pipes produced comply with international GB/T9711 and oil and gas industry standards SY/T5037 and SY/T5040. The national oil and gas industry standard produces various steel grades of double-sided submerged arc welded spiral steel pipes with diameters ranging from 159mm to 3620mm and wall thicknesses ranging from 3.5mm to 25mm, as well as straight seam welded steel pipes with diameters ranging from 57mm to 630mm and wall thicknesses ranging from 3-16mm. Each spiral steel pipe production line is equipped with X-ray, ultrasonic, and static water pressure for full line automatic detection. Spiral steel pipes are widely used in water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, and urban construction. Spiral pipe materials: Q235A，Q235B,Q345B,L245，L360，X70，X800Cr13、1Cr17、00Cr19Ni11、1Cr18Ni9、0Cr18Ni11Nb、Q345、L245、L290、X42、X46、X70、X80. Spiral pipe types: dredging spiral steel pipe, mud conveying spiral steel pipe, gas conveying spiral steel pipe, oil conveying spiral steel pipe, well drilling spiral steel pipe, pile driving spiral steel pipe, column spiral steel pipe, well drilling spiral steel pipe, flower pipe, advertising board column spiral steel pipe, water gas conveying spiral steel pipe, anti-corrosion and insulation spiral steel pipe, chemical spiral steel pipe, etc. For the convenience of customers, we can process steel pipe anti-corrosion, steel pipe insulation, pipe end flange welding and other services locally. The forming process of thick walled spiral steel pipes adopts advanced double-sided submerged arc welding technology, which can achieve welding in position and is not prone to defects such as misalignment, welding deviation, and incomplete penetration. It is easy to control the welding quality and position. Spiral steel pipes adopt special welding processes, which can achieve welding at the welding position without any errors or defects, ensuring the qualification and quality of spiral steel pipes.

　　 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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• Spiral steel pipe for drainage pipeline