European Welding Standards
Harmonised Standards
Not all EN Standards are Harmonised, only those that are considered to satisfy relevant
ESRs in product directives. Harmonised standards contain an appendix Z, which
defines which directives and ESRs the standard meets. For example:- EN ISO 15614 will
be harmonised, but other routes for weld procedure approval may not be, such as EN
ISO 15610, EN ISO 15611, EN ISO 15612 etc.
ISO Standards
There is a Gentleman’s agreement that attempts to make all EN standards into ISO
standards and vice versa, but this does not work for all standards.
Application Standards
EN 13445 : Pressure Vessels ( BS 5500)
EN 12952 : Water Tube Boilers ( BS 1113)
EN 12953 : Shell Boilers ( BS 2790)
EN 13480 : Piping ( BS 806, Not BS 2640, BS 2971)
