China astm a53 grade a / b erw steel pipe manufacturer landee provides erw pipe made by astm a53, a106, a519, a213, api 5l, apl 5ct, 1.8 to 20mm wt. Keywords: erw, astm a53 gr b steel pipe, astm a53 gr a steel pipe. Length: srl, drl, specified length as required. Outer diameter: 21.3 to 219 mm. Thickness: 1.8 to 20 mm. Standard: api 5l, apl 5ct. Material: astm a53, astm a106, astm a519 and astm a213/a213m.