1.Seamless pipe professor 2.MTC,ISO,API certificate 3.ASTM,DIN,BS,JIS 4.On time delivery 5.Big store,excellent package. Liaocheng Tongyun Pipe Industry Co.,Ltd-- Seamless Steel Pipe Professor1.Our pipe size OD: 1/8'' to 12'', nomical thickness :Sch5s to XXS OD 14mm to 325mm, wall thickness: 2mm to 30mm Also we can produce expand pipe from 20'' to 24''2.Our pipe including: ASTM A106 seamless ...