Application: Used for transporting low pressure liquid, gas and heating.Specification: OD: 21.3mm ~ 610mm WT: 0.5mm ~ 20mm LENGTH: 0.3mtr ~ 18mtr, Ramdon Length, Fixed Length, SRL, DRLStandard and Grade: GB/T 3091 Q195/Q215/Q235/Q345, BS 1387, EN 39,