Hebei Senhai Pipeline Co.,Ltd. is the most professional manufacturer and exporter the following products: 1.SAWL / LSAW / ERW / EFW WELDED STEEL PIPES;GOST 10704-91,GOST 10705-80 LONGITUDINALLY WELDING STEEL TUBES, GOST 20295-85 ELECTRICALLY WELDED STEEL LINE-END TUBES WITH 3PE,3PP,EPOXY,FBE,CEMENT ANTICORROSION;OD406mm~1422.4mm,WT 5mm-80mm. GOST 10704-91,GOST 10705-80, ASTM A36,ASTM A53 GR B,API 5L GR B,ST.52.3,ST.37.2,ST.20#,SS400,ASTM A671, ASTM A672 CL11-23,S235JR,S355J2H,S355JOH,Q235B,16MN ,PSL1,PSL2 X42,X46,X52,X60,X65,X70 etc. 2. HSAW / SAWH / SSAW / SAW / SPIRAL WELDED STEEL PIPES;GOST 8696-74 ELECTRICALLY WELDED SPIRAL SEAM STEEL PIPES WITH 3PE,3PP,EPOXY,FBE,CEMENT ANTICORROSION ; OD219mm~3620mm,WT 5mm-26mm. GOST 8696-74,ASTM A36,ASTM A53 GR B,API 5L GR B,ST.52.3,ST.37.2,ST.20#,SS400,S235JR,S355J2H,S355JOH,Q235B,16MN ,PSL1 X42,X46,X52,X60,X65,X70 etc. 3.HOT ROLLED SEAMLESS STEEL PIPES;GOST 8731-74,GOST 8732-78 SEAMLESS STEEL PIPES WITH 3PE,3PP,EPOXY,PITCH,ZINCRICH ,FBE,CEMENT ANTICORROSION;OD 21.3-820mm.WT:2MM-50mm GOST 8731-74,GOST 8732-78, ASTM A36,ASTM A53 GR B,API 5L GR B,ST.52.3,ST.37.2,ST.20#,SS400,S235JR,S355J2H,S355JOH,Q235B,16MN ,PSL1,PSL2 X42,X46,X52,X60,X65,X70 etc. 4.SHS SQUARE HOLLOW SECTIONS,RHS RECTANGULAR HOLLOW SECTIONS; OD20X20mm~600X600mm,WT 0.8~50mm. GOST 8639-82,GOST 8645-68,GOST 8644-68,ASTM A500 GR B, SS400, ASTM A36,ASTM A53 GR B,API 5L GR B,ST.52.3,ST.37.2,ST.20#,SS400,S235JR,S355J2H,S355JOH,Q235B,16MN etc. MORE DETAILS,PLEASE KINDLY CONTACT WITH US. Sincerely Yours, Teddy Shi (Mr.) General Manager Hebei Senhai Pipeline Co.,Ltd. Add.:No.7 Beihai Rd.,Economic & Technological Development Zone, Cangzhou City, Hebei Province, China T.e.l: +86-317-2180586; F.a.x: +86-317-3172336; C.P: +86-13231768661 sales(at)senhaipipeline(dot)com 3w(dot)senhaipipeline(dot)com M..S.N: spnisthebest(at)hotmail(dot)com S.k.y.p.e: hl-pipefitting Ya.hoo Me.ssen.ger: spnisthebest(at)yahoo(dot)com Goo.gle Tal.k: spnisthebest(at)gmail(dot)com I.C.Q:677631155 Q..Q:137950903