... 3.Excellent quality. 4.Various size. 1.NameStainless steel rectangular pipe2.Standard: GB14976-2002, GB13296-2007, JIS, AISI, ... Length As required 6.Section Shape:Round square and rectangular 7.Material:304,304L,310S,321,321H,316, ... . 13.Certification:ISO,QMS,DNV,KR,ABS,TUV,Lloyd's Register,BV.14.Application:Mechanism, Heat exchanger, boiler, ... quality.4.Various size. Stainless steel rectangular pipe