we are an ISO9001:2000,CE/PED,ABS,DNV,KR,LR,GL, GOST certified leading maunfacture .Duplex stainless steel pipe we are an ISO9001:2000,CE/PED,ABS,DNV,KR,LR,GL, GOST certified leading maunfacture .Duplex stainless steel pipeStandards:ASTM A312,ASTM A213,ASTM A269 , ASTM A789,DIN17456,DIN17458, EN10216-5Steel Grade: 304, 304L, 310S, 316,316L , 317L, 321,904,S31803,S31500,S32750 Outside Diametre:6mm ...