... 4.Application:boiler,oil transportation, struction 5.Cert.: ISO -------------------------------------------1.stainless steel pipe2.O.D.:6mm~2220mm3.W.T.:0 ... .3mm~80mm4.Application:boiler,oil transportation, struction5.Cert.: ISO ... , A213, A333, DIN1629, DIN17175, Russian standard, Franch stan.)2. stainless steel pipe (304, 316, 316L, 304L, 321, 410, 444 ...