The main–pressure-bearing parts are the parts,
- which constitute the envelope under pressure, and
- the parts which are essential for the integrity of the pressure equipment.
Examples of these parts are shells, ends, main body flanges, tube sheets of exchangers, tube bundles.
The materials for these main-pressure-bearing parts of equipment of categories II to IV shall have a certificate of specific product control (3.1 EN 10204).
Remark: A bolt is not considered to be a main pressure bearing part unless its failure would result in a sudden discharge of pressure energy.
Read More
What are pressure-bearing components?
EN 13445: Requirements of material used for non-pressure parts