Inert gas systems components: UK21/F022

Adopted EU recommendation FIRE-069. UK approved recommendation on the clarification of inert gas system components.

From:
Maritime and Coastguard Agency
Published
19 July 2023
Category:
Fire protection equipment
Year adopted:
2021
Reference number:
UK21/F022
Keyword:
FIRE-069

Question

Resolution MSC.367(93) gives detailed requirements for nitrogen generator systems. Should N2-compressors be considered equal to IGG-blowers with regards to certification? Which components should be covered and certified under UK/3.42 (inert gas systems components)?

Recommendation

N2-compressors and other IG-equipment shall be delivered with a UK approval certificate.

Equipment that should be regarded as 바카라 사이트œInert gas systems components바카라 사이트 under UK/3.42

Number Component FSS Code Chapter 15 (section) Testing standard
1 Inert gas fans/blowers 2.3.1.4 (MSC/Circ.353 items 3.4, 3.5 and 9.3)
2 Inert gas generators 2.3.1.1 Functional testing incl. control, monitoring and alarm.
3 Inert gas scrubbers 2.3.1.1 (MSC/Circ.353 items 3.2, 3.3 and 9.2)
4 Sea water pumps for scrubber 2.3.1.3 Pressure testing of pump housing. Capacity testing based on head-capacity curve.
5 Nitrogen generators (being equivalent to IGG) 2.4; 2.4.1.3 Functional testing incl. control, monitoring and alarm. O2-content and max capacity. [footnote 1]
6 Nitrogen air compressor (equivalent to blowers) 2.4.1.1; 2.4.1.3 Certification is required when serving an Inert gas plant required by SOLAS. See certification requirements separately at the bottom of this document. [footnote 2]
7 Inert gas control and monitoring system (to include DBB-arrangement, if fitted) 2.2.4.5; 2.4.2 Functional testing and alarms. Ref. 9.7.
8 Any pressure vessels (p*v>1.5) 2.4.1.4 Pressure testing. NDT. Functional testing.
9 Double block and bleed valve arrangement (being equivalent to deck water seal) 2.2.2.6; 2.2.3.1.2 Functional testing and alarms. Ref. 9.7.
10 Pressure/Vacuum-breaker 2.2.3.2.4 Capacity and activation pressures at various heels and trim.
11 Deck water seal 2.2.3.1.2 (MSC/Circ.353 items 3.6.2. and 9.4)
12 Sea water pumps for deck water seal 2.2.3.1.4 Pressure testing of pump housing. Capacity testing based on head-capacity curve.
13 Cooling water pumps for compressors (normally air cooled) Ā  Pressure testing of pump housing. Capacity testing based on head-capacity curve.
14 Non-return valves 2.2.3.1.3 (MSC/Circ.353 items 3.7 and 9.5)
15 Gas regulating valve 2.3.1.2 (MSC/Circ.353 items 3.10 and 9.7)
Object Certificate type Issued by Certification standard Additional description
Compressor PC Society Ā  Ā 
Crankshaft MC Manufacturer Ā  Ā 
Connecting rod TR Manufacturer Ā  Material
Cylinder with head TR Manufacturer Ā  Material
Rotors MC Manufacturer Ā  Ā 
Rotor casing Manufacturer Ā  Ā 

References

  • MSN 1874 as amended
  • The Merchant Shipping (Marine Equipment) Regulations 2016 as amended
  • MSC.367(93)

Items affected

  • UK/3.42, Inert gas systems

More information

Maritime and Coastguard Agency
Bay 2/21
Spring Place
105 Commercial Road
Southampton
SO15 1EG

Telephone: +44 (0) 203 817 2000

Email: MEQA@mcga.gov.uk

Website: www.gov.uk/mca

  1. Minimum one N2 generator with capacity from the upper quantile and with capacity from the lower quantile should be tested.Ā ā†©

  2. Certification requirements for compressors serving an inert gas plant required by SOLAS.Ā ā†©

Updates to this page

Published 19 July 2023
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