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 / 
British Standards Institution. 
 - 1 volume (unnumbered pages) :  British Standards Institution,   33cm. 
 - British standard ;  BS 1387 : 1985 .
 - British standard ;  BS 1387 : 1985 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Steel--Welding--Great Britain.<br/>Steelwork. Steelwork