carbon steel erw pipe welded steel pipe in two forms, AC and DC welding pipe.
AC welding is divided according to the different frequencies of the low-frequency welding, frequency welding, welding and high frequency welding ultra-IF. Mainly used for high-frequency welding or general thickness of thin-walled steel pipe production, high-frequency welding is divided into contact welding and induction welding.
DC welding is generally used for small-diameter steel pipe.
So, overall speaking, high-frequency welded pipe contained in the carbon steel erw pipe, ERW pipe is a high-frequency welding process of production. carbon steel erw pipe is advanced in the field of oil and gas storage and transportation of product performance, quality leadership, more economical pipe.
carbon steel erw pipe products perform API SPEC 5L, 5CT, GB / T9711.2, SY / T5037, GB / T8163, GB / T8162 standards.