Industry Standard Update 114

IGEM/GM/6 Edition 3 Non-domestic meter installations. Standard designs Date issued: 3 November 2022

This Industry Standard Update provides an overview of the key areas of change arising from the revision of IGEM/GM/6 Ed 3, Non-domestic meter installations, Standard designs.

Introduction

The Institute of Gas Engineers and Managers (IGEM) has published a revision of IGEM/GM/6 Edition 2 Non-domestic meter installations, Standard designs(1) (communication 1750). The new standard, IGEM/GM/6 Edition 3(2) (communication 1864), replaces the previous edition of this standard which is now withdrawn.

To allow registered businesses time to carry out internal update training to reflect the technical requirements of the amended standard, Gas Safe Register will inspect to the new requirements of this standard from 1 January 2023.

However, this should not restrict businesses from applying the specification sooner.

The following is a brief overview of the amendments made to IGEM/G/6 Edition 3.

General

In section 3: Legal and Allied Considerations, the subsection 3.15.5 now details the requirements of new meter design and their compliance with the Measuring Instruments (Gas Meters) Regulations.

Section 7.2 states the requirement for meters to be fire-resistant when located within premises with no readily accessible service valve.

The comments on the sealing of regulators have been removed from section 9.2.6. However, this is stated in note 3 of 6.1.1 and throughout the standard.

Table 6 now includes standards required for thermal mass and ultrasonic meters.

The guidance for pipe supports, section 11.2, has been significantly increased, with greater explanation of the requirements.

Section 14.5.13, Location, now includes a comment that doors or gates should not open on to a public thoroughfare and cause a hazard.

Note 1 of 15.1.6 comments on the requirements for meter exchanges and the existing ECV, when a not normally acceptable valve may be accepted when it meets certain specifications.

Installing requirements in section 15.2 have been amended to include guidance on pressure losses through the meter design and the alignment of flange bolt holes (Figure 8).

Labels

An improved example of a Composite Notice is given in Figure 12 to assist engineers.

Additional labels have been included in section 18.3.2.2 and 20.13; where it is found that a Gas Transporter (GT) has not fitted an ECV label, a substitute label as shown in Figure 17 must be completed and fitted. If metering equipment is to be removed from site with no intent of replacing, then the label shown in Figure 32 shall be installed.

Summary As previously stated, this Industry Standard Update is only a brief overview of the information contained in the amended standard. Registered businesses should be aware that they have a responsibility to ensure that they are fully apprised of all the requirements of the whole published standard and their practical application.

Bibliography

(1) IGEM/GM/6 Ed 2 Non-domestic meter installations. Standard designs (Communication 1750) (2) IGEM/GM/6 Ed 3 Non-domestic meter installations. Standard designs (Communication 1864)