§ 29 Passive fire protection
Where passive fire protection is used, this shall be designed such that it provides relevant structures and equipment with sufficient fire resistance as regards load capacity, integrity and insulation properties.
When designing passive fire protection, the cooling effect from fire-fighting equipment shall not be considered.
Section last changed: 01 January 2015
For determination of fire loads according to the first subsection, see Section 11.
Adequate fire resistance as mentioned in the first subsection, should be determined in relation to recognised standards or calculation models. When stipulating fire resistance for load-bearing structures, varying material utilisation can be taken into account.
To determine the fire resistance, the test methods in standards ISO 834, ISO 3008, ISO 3009 and NS-EN 13381 Parts 4 and 8 should be used. For pool fires, the hydrocarbon curve described in the standard NS-EN 1363-2, should be used. To determine the ability of passive fire protection materials to withstand jet fires, the ISO 22899-1 standard Part 1 General requirements should be used. If structures, pipes and equipment can be exposed to fire loads beyond what is covered in the mentioned standards, the ability to withstand this should be documented.
In order to fulfil the requirements for loadbearing properties, integrity and insulation properties as mentioned in the first subsection, the NORSOK S-001 standard Chapter 20 should be used, with the following addition: for gas and liquid-filled vessels and pipe sections, the passive fire protection should be sufficient to prevent an unacceptable rupture. Chapter 18.104.22.168 of NORSOK S-001 should be used in defining an unacceptable rupture.