Technical - Gas Measurement Series Standards

• IGE/GM/4 - Flowmetering practices (> 38 bar and < 100 bar)

  • specification, design, installation and operation of meter installations for high accuracy flow measurement of piped Natural Gas operating within the pressure range exceeding 38 bar and not exceeding 100 bar.
  • cover orifice meters, turbine meters and ultrasonic meters (USMs).

  View the full Introduction and Scope in the Shop. 

• IGEM/GM/5 - Gas meter volume conversion systems

  • gives guidance and applies to installed meters of maximum operating pressure (MOP) not exceeding 100 bar
  • covers subsequent monitoring and maintenance of gas volume conversion systems.

  View the full Introduction and Scope in the Shop. 

• IGEM/GM/6 - Non-domestic meter installations. Standard designs

  • covers standard designs for either a diaphragm or rotary displacement (RD) meter installations with meters of badged capacity exceeding 6m³/h and not exceeding 1076 m³/h, with a maximum operating pressure (upstream) not exceeding 75mbar (within its Scope) and is a standard means of complying with IGE/GM/8.
  • IGEM/GM/6 is a pre-requisite for complying with MAMCoP (Category 3) and/or Ofgem (formally Ofgas) CoP/1b.

  View the full Introduction and Scope in the Shop. 

• IGEM/GM/7A - Gas meter electrical connections

  • provides requirements for ensuring thatelectrical equipment will not be a source of ignition
  • assist in compliance with DSEAR and the ATEX Directives
  • ensures electrical equipment can be safely connected
  • outlines requirements for the differing levels of competency when working on various types of gas installation, no matter what type of work is being carried out.

  View the full Introduction and Scope in the Shop. 

• IGEM/GM/7B - Gas meter hazardous area classification

  • complements the Office of Gas Supply (OFGAS) Codes of Practice (CoPs), the Office of Gas and Electricity Markets (Ofgem) MAMCoP and the Dangerous Substances and Explosive Atmospheres Regulations (DSEAR) 
  • covers meter installations of maximum operating pressure (MOP) not exceeding 75 bar.
  • applies to installations containing Natural Gas (a 2nd family gas as defined by BS EN 437) in the gaseous state.
  • covers primary and secondary meter installations and associated volume conversion equipment and all associated electrical equipment and connections, in industrial and commercial premises and which have been installed to BS 6400-1, BS 6400-2, IGE/GM/4, IGEM/GM/6, IGE/GM/8 and IGEM/GM/5, as appropriate.

  View the full Introduction and Scope in the Shop.

• IGE/GM/8 - Non-domestic meter installations

  • this Standard is for installations that are wholly downstream of the outlet of the emergency control valve (ECV) as recommended in IGEM/G/1, and not part of the Network. In consequence, the owner or user of the installation is not a conveyor of gas and would not be subject to the general duties of the Gas Safety (Management) Regulations (GS(M)R).
  • For clarity and ease of use IGE/GM/8 is published in 5 parts:
    • Part 1 covering design
    • Part 2 covering locations, housings and compounds
    • Part 3 covering installation and commissioning
    • Part 4 covering operation and maintenance
    • Part 5 covering notices and labels.