we are professional in seamless steel pipe /welded steel pipe uesed for structure,petroleum line pipe manufacture and export trading,such as GB20#,45#seamless steel pipe;GBQ235,Q345,Q195 weldded stee pipe.also we sell the stainless steel pipe as per ASTM A312/213 TP304,TP316,etc. if you have any requirement pl let me know.Tks for your cooperation!