BS 1387:1985(1998) Specification for Screwed and socketed steel tubes and tubulars and for plain end steel tubes suitable for welding or for screwing to BS 21 pipe threads
2004BS EN 10255:2004 Non-alloy steel tubes suitable for welding and threading. Technical delivery conditions
1985BS 1387:1985 Specification for screwed and socketed steel tubes and tubulars and for plain end steel tubes suitable for welding or for screwing to BS 21 pipe threads