OD 20mm - 273mm WT 1.5mm - 16mm welded steel pipe, Features and specifications:1) High-frequency welded2) Outer diameter: 15-323mm3) Thickness: 0.5-10mm 4)Steel grade: SPHC, 08AL, 08F, HG5, DF08, Q195-235, M85)Standards: ASTM, API, JIS, DIN, EN, BS, GBMp: steel pipe