http://www.ec21.com/ec-market/j55 steel pipe.html http://tjsdtl.en.ec21.com/Oil_Casing_Steel_Pipe_J55--3760849_3948456.html oil casing steel pipe J55/K55/N80/L80 1) Sizes: OD 4-1/2"~13-3/8" 2) main Grade: J55, K55, N80, L80 3) Type of thre20091118 http://amchina01.en.ec21.com/Welding_Pipe--2539378_3849310.html Type Electric Resistance Weld, Electric Fusion Welding, Spiral ERW Steel Pipe, Spiral Submerged Arc Welding Steel 20100106 http://ritia.en.ec21.com/Casing_Pipe_Oil_Casing_Pipe--3418353_3418409.htmlJ55, K55, N80, P110, api 5ct pipe/api casing pipe/seamless pipe/oil steel pipe/casing pipe/oil casing pipe keywords:Ca20100107 http://kwksteel.en.ec21.com/Casing_Pipe_API_SPEC_5CT--3723479_3724314.html Casing Pipe API SPEC 5CT ISO 11960:2004,Petroleum and natural gas industries-Steel pipes for use as casing or tubing f20091228 http://honrysuri.en.ec21.com/API_5L_GR.B_Casing_Pipe--3848002_3906043.htmlJ55, K55, N80, P110, api 5ct pipe/api casing pipe/seamless pipe/oil steel pipe/casing pipe/oil casing pipe keyword:oil 20091119 http://lilina84117.en.ec21.com/Steel_Pipe--3940099_3838192.htmlsteel pipe, standard API 5L, API 5CT, steel grade A25, A25P, A, B, X42, X46, X52, X56, X60, X65, X70, X80, H40, J55, K520100107 http://happybar.en.ec21.com/EWR_Steel_Pipe--3907729_3907788.html EWR steel pipe We can produce Seamless Steel Pipes, stainless steel pipe, welded pipes and galvanized pipes. 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