This European Standard specifies requirements for steel butt-welding fittings (elbows and return bends,concentric and eccentric reducers, equal and reduci ng tees, dished ends and caps) made of wroughtcarbon steel and delivered without specific inspection.
EN 10253-1:1999 history
1999EN 10253-1:1999 Butt-welding pipe fittings - Part 1: Wrought carbon steel for general use and without specific inspection requirements