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Shijiazhuang Faith Machinery Co., Ltd operates within a well-established network of China-based ERW tube mill suppliers, catering to global demands for high-frequency welded pipe production. The Chinese manufacturing sector for ERW equipment is characterized by integration of automated technologies and adherence to international standards such as API, ASTM, and EN .
Technical Specifications and Customization
Suppliers typically offer machines producing pipes with diameters ranging from 4mm to 720mm and wall thicknesses of 0.2mm to 22mm . Customization is a key focus, with engineers using software like COPRA® for roll design to optimize material flow during forming . Shijiazhuang Faith Machinery emphasizes flexibility, providing solutions for round, square, and rectangular profiles based on client requirements.
Production Line Components
A complete ERW line includes:
Uncoiler: Supports and feeds steel coils into the system .
Forming Section: Gradual shaping of strips via sequenced rollers .
HF Welder: Utilizes solid-state high-frequency units (100–400 kW) for seamless welding .
Sizing Unit: Ensures dimensional accuracy through driven stands and side rolls .
Flying Saw: Cuts pipes to lengths of 6–12 meters with ±3mm tolerance .
Quality and Compliance
Chinese suppliers often hold ISO 9001 and CE certifications . Quality control involves inline hydrostatic testing and eddy current/ultrasonic inspection to detect defects ≥0.2mm . Shijiazhuang Faith Machinery’s designs incorporate PLC-controlled monitoring for real-time adjustment of parameters like welding speed (20–120 m/min) and tension .
Global Supply Chain
Equipment delivery typically requires 3–6 months, with shipping via FOB or CIF terms . Post-sale services include installation support, operator training, and annual capacity planning for 10,000–180,000 tons .
