E- m ai l（M -S -N）:haichengqiu@hotmail.com Wang Haicheng+86- 158 3377 5527 SALE ASTM A106 GR.B SEAMLESS STEEL PIPE china Technical Standard:API 5LB,ASTM A 106 GR.B,ASTM A53 GR.B;High-pressure boiler pipe GB5310-1995,Special pipe for fertilizer making GB6479-2000,pipe for petroleum cracking GB9948-2000,low-and-medium-pressurre boiler pipe GB3087-1999,Fluid pipe GB/t8163-1999,structural pipe GBT8162-1999 and hydraulic support pipe
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