1.Uniform wall thickness
2.High roundness accuracy
3.Three-layer welding to ensure excellent weld performance
4.Good insulation performance
5.Strong waterproof ability
6.High impact resistance under low temperature conditions to be directly buried in frozen ground
7.30-50 years service life
GK erw black steel tubes are available in different sizes and shapes or customized by clients. GK carries out a strict production and inspection rules to ensure all pipe quality meeting requirements. And ach seam welded pipe will be conducted X-ray inspection to meet international standards. All erw black pipe are produced in accordance with ASTM/IS/BS and various other international specifications under the instruction of our customers.
Erw black steel pipe is available in a variety of dimensions and used in field that does not requires galvanized steels. The strengths of erw black tubes have a good performance for transporting gas and water in urban and rural areas and also for conduits that protect electrical wiring and for delivering high pressure air and steams.
1. Composition and Mechanical properties of commonly used carbon steel alloy steel.
2. Seemless steel pipe, welded pipe, etc.
3. A series international universal series, domestic series.