... power,Boiler industry16-824×2-100 Casing pipe J55 N80, P110API SPEC 5CT-- oil pipe for oil well, Coupling Cylinder60-630×1.53 ... seamless pipe10-530×1.5-36 high-pressure seamless pipe for chemical fertilizer equipment 20,16Mn,Q345GB6479-2000Fertilizer Equipment- ... T6278-2002 Structure, decoration, construction20*20-500*500 ductile iron pipe-ironGB/T13295-2003 ISO2531/2003- Public works, mining, textile ...