Product API 5L ANTI-CORROSION SPIRAL STEEL PIPE MANUFACTURER Technique SSAW(spiral submerged arc weld) WITH LINCOLN ELECTRIC WELDING MACHINE Standard API 5L,API 5CT,ASTM A53-2007,A106-2006,A252-1998,A1020-2002, BS 1387,BS EN 10217,BS EN 10219,DIN 17175,DIN EN 10217-1-2005, GB3091-2001,GB 9711.1-1997 Material of Foreign Grade API J55,K55,N80,L80,P110,A53(A,B),A106(B,C) ST37-2,ST35.8 S185,S235JR, ...