1 Scope

This document specifies the following materials for the pressure parts of shell boilers and equipment of shell boilers (e.g. valves), subjected to internal and external pressure including integral attachments:

• flat products (plate) and parts formed from flat products (e.g. shell, furnace, dished ends);

• tubes and parts formed from tubes (e.g. tube bends, elbows, reducers, fittings);

• forgings and cast products;

• bolting materials;

• welding consumables.