1. Type:
Round pipe, Square pipe, Rectangular pipe

2. Name:
HFW steel pipe, ERW black pipe, Straight seam welded pipe

3. Characteristic:
    High frequency welding have good tube shape, uniform wall thickness, the inside and outside burr produced by welding slick by corresponding cutters, use nondestructive testing (NDT) methods to control of welding quality through leveling online , high degree of automation, low production cost. But wall thickness not more than 12 mm, tube diameter is generally not more than 610 mm; it is especially suitable for making pipe frame structure.

4. ERW Steel Pipe Product Specification:
O.D.: ?21.3mm-?660mm
Length: 3m-12m
W.T.: 1.5mm-17.75mm
Material: Q235A,Q235B,Q235C,Q345(16Mn)
Product standards: API-5L/ASTMA53/ASTMA106/GB/T3091-2001
Annual output: 100000MT