This European Standard specifies the following materials for the pressure bearing parts of shell boilers and equipment of shell boilers (e.g. valves), subjected to internal and external pressure including integral attachments (non pressure bearing parts):
flat products (plate) and parts formed from flat products (e.g. shell, furnace, dished ends);
tubes and parts formed from tubes (e.g. bending, elbows, reducers, fittings);
forgings and cast products ;
bolting materials;
welding consumables.
