8.1.5 Gas services
Gas service installations shall be adequate and comply with the gas safety regulations and be in accordance with relevant standards and codes to ensure safe and satisfactory operation. Gas service installations should take into account:
- gas service installation
- corrugated stainless steel tube.
8.1.5.1 Gas service installations#
Gas service installations should ensure:
- service pipework up to and including the emergency control valve and meter is in accordance with the requirements of the gas transporter, gas supplier and primary meter owner
- installation of pipework and appliances complies with relevant standards and codes including those published by the Institution of Gas Engineers and Managers (IGEM), British Standards Institute (BSI) or Gas Safe Register (GSR)
- where there is a gas supply to the home, a gas point at the cooker space should be provided. This is not required where an electric hob is provided
- where gas pipework is to be installed in timber frame, allowance is made for differential movement
- installation of gas pipes will not impair the structural stability, fire/smoke resistance, damp proof course, radon barrier, hazardous ground membrane, thermal or sound insulation of the building
- gas installation pipes are not over bent, stressed, or installed where subject to mechanical damage. See figure 5-9.
Figure 5: Masonry brick and block plastered
Figure 6: Dry lined walls on batons
Figure 7: Dry lined walls on dabs
Figure 8: Timber-frame or light steel construction wall
Figure 9: Installed in a timber frame or light steel construction wall
8.1.5.2 Gas pipe installations incorporating Corrugated Stainless Steel Tube (CSST)#
Gas pipe installations Incorporating Corrugated Stainless Steel Tube (CSST):
- conform to the corrugated stainless steel tube benchmark scheme with secondary cover for use as a secondary containment or BSI PP1644 flexible ventilated ducting for corrugated stainless steel tubing
- be certified by a UKAS accredited test body and tested in accordance with BS EN ISO 13823 and BS EN ISO 11925- 2 and classified in accordance with BS EN 13501-1 and achieve B-s1, d0 or better
- be adequately supported in line with manufacturer’s recommendations
- not be mixed with other proprietary brands of CSST or fittings
- not be buried in concrete floors, unless it is appropriate for the application, and confirmation from the manufacturer confirms it is suitable for this purpose.
CSST tubing without ducting shall meet the “tightness in case of fire requirements” of BS EN 15266, test method BS EN 1775 Annex A procedure A.
Where any pipe ducting used that is intended to be fire resistant it should be at least the same level as fire resistance as the protected area it is installed in. The fire resistance of the ducting shall be tested, evaluated and fire rated to the relevant parts of BS 476-24.
Last updated: 2nd January 2024