Galvanized ERW Steel Pipe

Galvanized ERW Steel Pipe is made from high-quality carbon steel strip coils, formed by high-frequency resistance welding (ERW), and then hot-dip galvanized (HDG) or pre-galvanized. It is widely used in construction, transportation, and structural engineering.

Superior Corrosion Resistance: A uniform zinc coating is formed using hot-dip galvanizing or pre-galvanizing processes.

Stable and Reliable Weld Quality: High-frequency ERW welding is employed, with online weld heat treatment and internal burr removal capabilities.

Precise Dimensional Control: Automated forming, sizing, and straightening equipment ensures strict control over outer diameter, wall thickness, and straightness.

Diverse Product Specifications: Supports various steel grades, zinc coating thicknesses, lengths, and pipe end processing.

Raw Material Inspection: Chemical composition, mechanical properties, and surface quality are tested on the steel strip to ensure compliance with production standards.

Cold Bending Forming: Continuous roll forming is used to process the steel strip into round tubes, ensuring dimensional stability.

ERW High-Frequency Welding: Welding is completed using high-frequency resistance welding. Heat treatment and internal burr removal can be performed as required to improve weld quality.

Sizing and Straightening: Outer diameter, wall thickness, and straightness are controlled using sizing and straightening equipment to improve product consistency.

Non-Destructive Testing: Hydrostatic testing, eddy current testing (ECT), or ultrasonic testing (UT) are performed according to product standards to ensure product quality.

Zincing Treatment: Hot-dip galvanizing or pre-galvanizing processes are used to control the zinc layer thickness and improve corrosion resistance.

Finished Product Packaging: After dimensional, appearance, and zinc layer inspections, protective packaging is performed according to export standards.

Size Customization: Customization of outer diameter, wall thickness, length, and special specifications is supported.

Pipe End Processing: Supports flat end, beveling, threading, grooving, and other processing methods.

Surface Treatment: Supports hot-dip galvanizing, pre-galvanizing, painting, and other surface treatments.

Custom Marking: Supports inkjet printing, steel stamping, laser marking, and OEM branding.

Custom Packaging: Supports export bundling, waterproof packaging, custom labels, and OEM packaging.

Q195: Suitable for light structures, fencing, and general civil engineering.

Q235: Excellent overall performance, widely used in building structures and general engineering.

Q355: Higher strength, suitable for heavy-duty structures and large-scale engineering projects.

ASTM A53 Gr.B: Suitable for fluid transportation, building, and industrial piping.

S235JR / S355JR: Meets European standards, suitable for structural and mechanical manufacturing.

Standards Supported: Supports standards such as ASTM A53, ASTM A795, ASTM A252, EN 10219, BS 1387, JIS, and GB/T 3091.

Testing Documents: Mill Test Certificates (EN 10204 3.1) and third-party testing services are available (upon customer request).

Export Packaging: Utilizes steel strapping, plastic caps, and waterproof packaging to minimize the risk of collision and moisture damage during transport.

Container Loading & Shipping: Optimizes container loading plans based on product specifications to improve loading efficiency and reduce transportation costs.

1. Advanced Production Equipment
We operate multiple high-frequency welded (HFW) pipe production lines capable of manufacturing round, square, and rectangular steel pipes. We are also equipped with cold-roll forming units for producing custom-profile sections. Downstream processing capabilities include precision cutting-to-length, punching, straightening, and surface treatment systems.

2. Guaranteed Quality
We supply certified products that meet standards such as EN 10219, ASTM A500, and ISO 1461 to engineering contractors and end-users.

3. Comprehensive Standards and Documentation
We manufacture products in accordance with ASTM, EN, DIN, JIS, and GB standards. We provide MTCs and EN 10204 3.1 certificates, and support third-party inspections by agencies such as SGS, BV, and TÜV.