Seamless steel pipes for low and medium pressure Steel Grade: 10, 20, Q345ect. Dimension: 10-426mm*2-40mm Standard: GB3087-1999 Usage: Low-middle boiler deating using, Boiling water pipe, Locomotive big or small smoke pipe We can supply all kinds of seamless steel pipes,steel bars,steel coil,U-ahannel and Angle steel.Please contact me if you have any requirements in this line of the products. I will give you the offer in the first time.