... /300/400 series tig welded stainless steel round or circular pipes for handrails decoration and construction in ... than 15 years experience in stainless steel market,a professional manufacturer.3)We completely produce the pipes ... ISO 9001:2008,ISO 14001:2004. 4.Standard: ASTM,AISI,JIS,DIN,EN,SUS,GB 5.Type:TIG ... Welded. 6.Steel Grade:201,202,301,304,316,304L,316L,430. 7.SurfaceTreatment:180grit,240grit ...