Spiral steel pipe

Processing and welding of spiral welded pipes: Prior to welding, remove rust, oil, water, paint, and any other contaminants that could adversely affect the weld. Select electrodes appropriate for the steel grade. The inter‑spot‑welding time interval should be shorter than that for carbon steel; therefore, use a spiral‑welded‑pipe brush when removing slag. After welding, to prevent localized corrosion or loss of strength, grind or clean the surface.

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Spiral steel pipe

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Product Description

　　Processing and welding of spiral welded pipes: Prior to welding, remove rust, oil, water, paint, and any other contaminants that could adversely affect the weld. Select electrodes appropriate for the steel grade. The inter‑spot‑welding time interval should be shorter than that used for carbon steel; therefore, a brush designed for spiral welded pipes should be employed when removing slag. After welding, to prevent localized corrosion or loss of strength, the surface should be ground or cleaned.
　　Cutting and Stamping: Spiral-welded pipes are stronger than conventional materials, requiring higher pressures for stamping and shearing. The clearance between the cutting tools must be precise to prevent shear‑induced work hardening. Plasma or laser cutting is preferred. When gas cutting or arc cutting is necessary, the heat-affected zone should be ground down and subjected to appropriate heat treatment.

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Smart Manufacturing Capacity Advantage

13 automated pipe‑making lines and 4 anti‑corrosion production lines, with an annual output of one million tons of steel pipes; all large‑diameter sizes are produced in‑house, ensuring stable lead times for bulk deliveries.

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Comprehensive nondestructive testing conducted by an independent laboratory, with dual certification under API and national standards; a long-term approved supplier for central state-owned enterprises, and fully qualified to bid on engineering projects.

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Customized solutions covering the entire oil & gas, municipal, and water‑conservation sectors, offering end‑to‑end support from conceptual design through logistics and after‑sales service, with capabilities for both domestic and international trade exports.