... 2.Wall Thickness:1.8mm-22mm 3.High quality and exciting price ASTM A53 ERW steel pipe1.Competitive in price2.Superior in ... Co.,Ltd,as a leading ERW and SSAW steel pipe manufacturerin China. All these steel pipes are suitable for the industries of ... ,gas,oil,oil drilling and machinery manufacturing,etcStandardAPI 5L, API 5CT,ASTMA53,EN10217,DIN2458,IS3589,JIS G3452,BS1387TypeERW,EFWOuter diameter21 ...