... , KR, ABS, GL, NK, LR, GOST,ISO9001:2000, PED97/23/EC and AD 2000-Merkblattwo We are a quality stainless steel tube ... thicknessGrade includes: most 300 series, like 304/L/H,316/L/LN/Ti,321/H,347/H,317/L,310S,904L,duplex 31803,32205,31500,Super ...