20#/A53 Gr.B Spiral Carbon Welded Steel Pipe
Large Diameter Production Capability: Can produce pipes with diameters ranging from 219mm to 3500mm, meeting the needs of large-scale projects.
Uniform Structural Strength: The spiral weld ensures more even stress distribution, providing excellent bending and compression resistance.
Cost-Effective Production: Compared to straight seam welded pipes, it offers higher material utilization, making it suitable for bulk supply of long-distance pipelines.
Comprehensive Standard Compliance: Meets international standards such as API 5L, EN 10217, and GB/T 9711.
Suitable for oil and gas transportation, water treatment pipelines, pile pipes, structural supports, and municipal pipeline networks. We support custom lengths, beveling, anti-corrosion coatings, third-party inspections, and provide complete quality documentation and export-related services.
Our spiral welded pipes are manufactured using high-frequency welding technology, delivering exceptional structural strength and pressure resistance for large-diameter applications. The continuous spiral seam design ensures uniform stress distribution, making these pipes ideal for long-distance fluid transmission and structural piling. Available in various grades including Q235, Q345, and X42-X70, etc. with anti-corrosion coatings (FBE, 3PE) optional. Widely used in water transmission, oil and gas pipelines, and construction foundation projects.
We operate multiple advanced production lines equipped with precision uncoiling systems, edge milling machines, and CNC forming units. High-frequency welding technology combined with real-time seam tracking ensures consistent weld quality, supported by comprehensive online inspection including ultrasonic testing and X-ray examination. Hydraulic expansion is applied to improve roundness and straightness, while automated cutting and beveling operations guarantee dimensional accuracy. The entire manufacturing process complies with international standards such as API 5L, EN 10219, and GB/T 9711.
In order to ensure product quality, we will arrange professional personnel to check product quality, packaging, weight, hardness, etc., according to customer requirements of product specifications, looking for high-quality and cheap cooperative factories in China, to provide customers with one-stop procurement services and quality assurance.
Excellent packaging: waterproof paper and plastic film + iron cover + at least three strapping straps + strapping straps fixed on iron or wood pallets can effectively protect products from corrosion and various climate changes during transportation. Generally speaking, we ship from Shanghai, Tianjin, Qingdao and Ningbo ports. We have worked with many experienced shipping companies for a long time to find the most suitable mode of transportation for you.