... Pipe with High Quality 1.WT:4-70mm OD:25-370mm 2.Certification:API 3.Professional manufacturer ASTM A106 GR.B Carbon Steel Pipe ... pipe A5L GR.B, X52,X60 API-for petroleum,natural gas, industrial dilivery(gas,water,oil)60-630×1.53-40 Rectangular ... TubeQ195,Q235,Q345,20#GB/T6278-2002 Structure, decoration, construction20*20-500*500 ductile iron pipe-ironGB/T13295 ...