... JIS ASTM 3.thickness:2-60mm 4.OD:20-667mm 5.material:15-45#,etc. we can supply seamless steel pipe ... , DIN ST 42-2, st 45-4, st52.4 (5) Usage: boiler use, water transport, building, machinery, traffic, aviation, oil development etc ... price will be lower.(10) Tolerate: OD +/-1%Thickness +12.5% / -10% length +/-2 cm