... temperature resistant,Low temperature-resistant, corrosion-resistant Seamless pipe for Petroleum, chemical, electric power,Boiler industry16-824× ... -530×1.5-36 high-pressure seamless pipe for chemical fertilizer equipment 20,16Mn,Q345GB6479-2000Fertilizer Equipment ... 500 ductile iron pipe-ironGB/T13295-2003 ISO2531/2003- Public works, mining, textile, electric power, boilers, drinking water, machinery ...