What is this standard about?
This standard’s purpose is to help gas meter installers meet the requirements of 16 UK and European regulations, including the Gas Safety (Installation and Use) Regulations.
Who is this standard for?
It will be used by gas meter installers and a range of other professionals within the gas industry, including:
- Training establishments providing gas industry courses
- Consultants
- Architects
- Specifiers
- Meter and meter installation component manufacturers
- Housebuilders
Why should you use this standard?
It specifies requirements for the installation, exchange, relocation, maintenance and removal of credit or prepayment diaphragm and ultrasonic gas meters with a maximum capacity not exceeding 6 m³/h.
This part of BS 6400 applies to primary and secondary meter installations:
- Supplied with 2nd family gases from low pressure gas distribution systems with a maximum operating pressure not exceeding 75 mbar, a design minimum pressure of 19 mbar and a design maximum incidental pressure of 200 mbar
- Fitted downstream of the emergency control valve
- That utilize a primary meter regulator downstream of the emergency control valve
- Where the operating pressure at the outlet of the meter is nominally 21 mbar
NOTE 1: For the purposes of this standard, installation includes design, inspection and commissioning. It is recognized that each of these tasks can be performed by the same person.
What’s changed since the last update?
- The standard was revised to:
- Meet the agreed GSE/30 format of adding a section to cover maintenance activities
- Incorporate publications such as BS 8499
- Support document COP/1a, the Ofgas Code of practice for low pressure meter installations with capacities not exceeding 6 m³/h. Consequently, the 2016 version includes:
- Updated commentary to Clause 12.1
- Amendments to Clause 13, covering the resisting of the equipotential bondo
- Amendments to Clause 15, adding that the records should be held for a primary meter
NOTE 2: Low pressure gas networks in Great Britain operate with a maximum operating pressure not exceeding 75 mbar, a design minimum pressure of 19 mbar and a design maximum incidental pressure of 200 mbar.
NOTE 3: Installation pipework is specified in BS 6891.
NOTE 4: Service pipes (including the emergency control valve) are specified in the Institution of Gas Engineers and Managers’ publication on gas services, IGE/TD/4.
NOTE 5: All pressures quoted in this standard are gauge pressures and all pressure absorption values are for natural gas unless otherwise specified.
NOTE 6: Additional guidance on domestic gas systems can be found in the European functional standards BS EN 1775, BS EN 1776 and BS EN 12279. NOTE 7: Additional guidance on gas installations in multi-occupancy buildings is given in IGEM/G/5.
