... Standard:GB /STM/ASME/JIS/DIN/EN.etc. stainless tubes and fittingsO.D.:38mm-325mmW.T.:1mm-110mmStandard: ... or wooden cases or according the customersstainless steel tube: Grade: 304,304L,316,316L,316Ti,310s.312stainless steel ... tube:Grade304, 304L, 316, 316L,316Ti, 310S, 321 ect. ... food machinery, water supply, boiler heat exchangers etc. Stainless tube