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GAS PIPING
The gas piping material shall be Corrugated Stainless Steel Semi-rigid
pipe Kitemarked to British Standard BS 7838 and installed in accordance
with British Standards BS 6891, (2nd family gases), or BS 5482:Part 1,
(3rd
family gases),
in domestic premises, or in accordance with the Institution of Gas Engineers
publication IGE/UP/2 in other premises.
The stainless steel tubing should not be annealed after forming to ensure
maximum crush resistance, and the attachment fittings must have a metal-to-metal
seat to accomplish gas sealing. Elastomer seal rings or fibre gaskets
are not permitted in the tubing to fittings sealing mechanism.
A non-metallic jacket, coloured yellow ochre, and marked ‘GAS’,
of non-halogenated, fire and smoke retardant polyethylene shall be used.
Polyvinyl chloride (PVC) is not permitted as a jacket material.
Where piping penetrates floor slabs evidence of a minimum 2 hour fire
rating is required for the gas piping material.
The gas piping material shall satisfy the requirements in BS 6891 for
sleeved pipe, such that the piping can pass through unventilated voids,
without joins, whilst maintaining its sleeved integrity.
For timber frame housing, (refer to IGE/UP/7), the sleeving must be maintained,
as above, without joins, where the pipework passes through unventilated
voids in the construction.
(Type TracPipe semi-rigid gas piping, available from
OmegaFlex Limited,
Kildare House, Wildmere Road, Banbury, Oxon, OX16 3JU, United Kingdom
Tel: 0870 286 85 85, or approved equivalent.)
FGP-076 UK March 2004
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