... percent good price long term cooperation 201# 1.52mm50*50mm stainless steel square pipe,stainless steel tubestandard nickle percentgood pricelong term cooperationStandard ... ,GB13296-2007,ASTM A269,ASTM A312,JIS G3459,DIN17458 stainless square pipeApplication:oil, chemical, boiler industry, high temperature resistance,resistant corrosion ...