... name-main material-standard-usessize range(mm)stainless steel pipe 0Cr18Ni9 (304),00Cr19Ni10 (304L),00Cr17Ni14MO2(316L),00Cr17Ni12MO2(316 ... temperature resistant,Low temperature-resistant, corrosion-resistant Seamless pipe for Petroleum, chemical, electric power,Boiler industry16-824 ... ,20#GB/T6278-2002 Structure, decoration, construction20*20-500*500 ductile iron pipe-ironGB/T13295-2003 ISO2531/2003 ...