BS 6173:2020 pdf download – Installation and maintenance of gas‑fired catering appliances for use in all types of catering establishments (2nd and 3rd family gases) — Specification

BS 6173:2020 pdf download – Installation and maintenance of gas‑fired catering appliances for use in all types of catering establishments (2nd and 3rd family gases) — Specification 7.1.3To prevent corrosion, the pipework, associated fittings and supports installed shall be corrosion-resistant or painted with a finish impervious to greases and cleaning chemicals. 7.1.4 Where pipework passes through a sleeve to enter the catering area, the sleeve shall protrude not less than 25 mm from the finished surface of the wall or floor where water or chemical cleaning materialscould be used. 7.1.5 Sleeves shall be sealed with a flexible sealant at the kitchen side to avoid corrosive cleaning substances building up inside the sleeve. NOTE Any corrosion protection applied to pipework should not prevent the pipework being identified as carryinga fuel gas (see 7.1.6). 7.1.6 Pipework shall be clearly identified as carrying a fuel gas by painting the pipework yellow ochre in accordance with BS 4800:201108C35 or primrose yellow in accordance with BS 4800:201110E53,or, alternatively, by applying a “Gas” marker tape at suitable intervals along the pipework. NOTE Further information on identifying gas pipework can be found in IGEM/UP/2[N5] or TechnicalBulletin 031 [29]. 7.1.7 Pipework shall be installed with a minimum of 25 mm between the pipework and an adjacent surface(such as a wall) to enable the pipework and the surface behind it to be cleaned. NOTE Metallic pipe supports are advised to achieve the 25 mm clearance. 7.1.8 Semi-rigid corrugated stainless-steel tube (CSST) shall not be used as the final gas appliance connections. 7.1.9 Any copper pipework fitted to a flexible connection shall be supported to prevent damage to the pipework when any appliance is moved. 7.1.10 LPG cylinder systems shall prevent the gas supply from being interrupted in normal use, e.g.by the use of automatic changeover valves. 7.2Valves 7.2.1General All valves shall be installed in accordance with IGEM/UP/2 [N5] or BS 6891, as appropriate.LPGinstallations shall be in accordance with UKLPGCoP 22 [N6] or CoP 24 Part 3[N1]as appropriate. 7.2.2 Manual isolation valves 7.2.2.1 A manual isolation valve shall be installed on the installation pipework to each catering area. NOTE The isolation valve is fitted to provide isolation for routine maintenance/alterations, testing and purgingof the downstream installation. 7.2.2.2 The manual valve shall be sited as near as practicable to the exit in a readily accessible location. 7.2.2.3 A pressure test point shall be installed within 300 mm downstream of the manual...