... -temperature resistant,Low temperature-resistant, corrosion-resistant Seamless pipe for Petroleum, chemical, electric power,Boiler industry16-824 ... exchanger tube- Pipeline seamless pipe10-530×1.5-36 high-pressure seamless pipe for chemical fertilizer equipment 20,16Mn ... 2002 Structure, decoration, construction20*20-500*500 ductile iron pipe-ironGB/T13295-2003 ISO2531/2003- Public works, mining, ...