BS 6400-1:2016

This standard BS 6400-1:2016 Specification for installation, exchange, relocation, maintenance and removal of gas meters with a maximum capacity not exceeding 6 m³/h is classified in these ICS categories:

• 91.140.40 Gas supply systems

This British Standard 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.

NOTE 1 For the purposes of this British Standard, installation includes design, inspection and commissioning. It is recognized that each of these tasks can be performed by the same person.

This part of BS 6400 is applicable to primary and secondary meter installations:

1. 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;

2. fitted downstream of the emergency control valve;

3. that utilize a primary meter regulator downstream of the emergency control valve;

4. where the operating pressure at the outlet of the meter is nominally 21 mbar. ¹⁾

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 [18].

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 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 [N7].