1.API 5L spiral steel pipe/ERW pipe/welded ... 5L spiral steel pipe1)Standards: SY/T5037-2001 GB/T9711.1 API 5L ASTM DIN2)Material :PSL1 A \B \ X42 \ ... welded steel pipe for municipal heat supplySteel Grade1>GB/T 13793, GB/T 6728, GB 15831, SY/T 5040,CJ/T 3022Q195 ... >Wall Thickness 3.2 mm - 40mm3>Length 6mtr-18mtrTest 1>Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield ...