20#/A53 Gr.B Spiral Carbon Welded Steel Pipe
Spiral welded pipe is manufactured using continuous spiral forming and submerged arc welding processes, offering exceptional structural integrity and uniform stress distribution. Ideal for large-diameter applications, it excels in high-pressure fluid transmission, structural piling, and long-distance pipeline systems, fully compliant with international standards such as API, ASTM, and EN.
Our fully automated production line implements comprehensive quality control from raw materials to finished products, ensuring on-time order delivery. Leveraging a standardized production management system, we commit to providing customers with reliable and stable delivery schedules, fully supporting the smooth progress of various infrastructure construction projects.
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.
Q: Are You Manufacture or Trade Company?
A: We are the professional manufacturer of pipeline products located in Tianjin，China. Welcome to contact us and visit our factory before you place orders.
Q: How do you guarantee the quality?
A: We can send free samples to you, we can accept third-party testing.
We also have test certificate, every batch goods will be testing before shipment, and the testing report will delivery to you with your goods.
Q: Can I get free samples?
A: Of course you can. We can produce according to your samples or technical drawings. Contact us by whatsapp or email to get free samples and you will get the sample after 3-7 working days.
Q: What is the MOQ?
A: If you are scheduling to place a small quantity order or trial order, feel free to contact us, we can meet your requirements.
Q: Can you OEM or ODM?
A: Yes, we have a strong developing team. The products can be made according to your request