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):
DS/EN 12953-2:2012 history
2012DS/EN 12953-2:2012 Shell boilers - Part 2: Materials for pressure parts of boilers and accessories
1999DS/EN ISO 14644-1:1999 Cleanrooms and associated controlled environments - Part 1: Classification of air cleanliness