... -824×2-100 Casing pipe J55 N80, P110API SPEC 5CT-- oil pipe for oil well, Coupling Cylinder60-630 ... ×1.53-40 Low and medium pressure boiler tube 10,20GB3087-1999- for ... ×1.5-36 high-pressure seamless pipe for chemical fertilizer equipment 20,16Mn,Q345GB6479-2000Fertilizer ... pipe 5L GR.B, X52,X60 API-for petroleum,natural gas, industrial dilivery(gas,water,oil ...