FEN Publications

These procedures relate to Flow Weighted Average Calorific Value (FWACV) at GDN Biomethane Entry Points. This note is intended for biomethane operators to advise on the correct procedure for the exchange of gas calibration bottle, both the daily and Ofgem test gases attached to the Ofgem Official CVDD unit.

Our gas network is one of the best developed in the world, providing safe, secure, affordable energy to homes and businesses across the UK. To meet the biggest energy challenge of our generation – making deep cuts to carbon emissions by 2050 – we need to embrace new technology which builds on these strengths and delivers the integrated, flexible network of the future.

Gas Transporter Documents in a .zip file

The graphic illustrates the location of connected and accepted generation sites across the four GDNs by size of MW output.

This document has been put together to summarise work done during early 2021 via the ENA Entry Customer Forum (ENCF) to review processes associated with Calorific Value (CV) target setting and monitoring for Gas Distribution Network (GDN) connected biomethane sites.

This Gas Industry Standard specifies requirements for the production of distribution pipe fittings cast in grey cast iron (grades 14, 17 and 20 as specified in BS EN 1561). They are intended for supply to the gas industry for use up to 7 bar maximum operating pressure.

This Gas Industry Standard specifies performance requirements and test methods for distribution pipe fittings, cast in ductile iron, for use up to 7 bar operating pressures. It covers fittings in the DN 40 to DN 600 size range and applies to fittings which are manufactured with socketed, flanged or spigot ends for jointing by means of various types of gaskets, which are not within the scope of this standard

This Gas Industry Standard specifies requirements for distribution split tee and collar pipe fittings cast in grey or ductile iron for use up to 7 bar maximum operating pressures. This standard does not specify wrap-around steel fittings.

Historically the gas industry in the UK has made use of a variety of cold applied tapes and tape systems for corrosion protection of areas such as field joints, tees, bends, valves and service fittings.

This Gas Industry Standard specifies requirements for buried steel pipes and components for the transmission and distribution of gas, at all pressure ranges, and specifies the procedures for the surface preparation and field applied external coatings that provide corrosion protection to buried pipework and all associated buried components.

This specification specifies fusion bonded epoxy powders and multi-component liquid materials for use as anti-corrosion coatings on steel line pipe and fittings (tees and bends) used for the transmission and distribution of natural or manufactured gas as defined in ISO 13623.

This Specification is a supplementary to ISO 21809-5 and applies to bare steel pipes for use in pipeline transportation systems for the transmission and distribution of natural gas as defined in ISO 13623.

This Standard gives guidance on the use of aluminium based light metals and paints in potentially hazardous areas. This Standard is applicable to Gas Transporter installations that are zoned in accordance with the requirements of IGEM/SR/25 and BS EN 60079. 

This Gas Industry Standard specifies requirements for Thermal Cut Off valves for use with natural gas at pressures of up to and including 75 mbar. The requirements are based on those set out in DIN 3586, Thermally Activated Shutting-Off Devices for Gas.

This Gas Industry Standard specifies requirements for excess flow valves for use with natural gas at pressures of up to and including 75 mbar and diameters of up to and including 50mm. The requirements are based on those set out in DIN 30652-1, Excess flow valves - Part 1: Excess flow valves for gas installation.

This Gas Industry Standard (GIS) specifies the requirements for gas filters of nominal sizes 80 mm and above suitable for use at ambient temperatures in the range –20 ºC to 60ºC and in the nominal pressure range: a) above 75 mbar and not exceeding 2 bar; b) above 2 bar and not exceeding 7 bar. It is for use by manufacturers and suppliers of gas filters.

This Gas Industry Standard specifies requirements for pressure-rated insulation joints of all sizes operating on natural gas at pressures not greater than 7 bar and normally in the temperature range -20 °C to 50 °C.

This Gas Industry Standard specifies the design, performance and material requirements for inflatable bags for use in the primary (iris supported) position of an iris stop system. Special requirements for bags larger than 36 in are specified in Annex A and test procedures are specified in Annexes B to F.

This Gas Industry Standard specifies performance requirements for combined drilling, tapping and service fitting insertion machines. They are intended primarily for the drilling and tapping of grey and ductile cast iron gas mains and steel pipe of a suitable wall thickness, and for the insertion of service connections into the tapped holes, at pressures up to 2 bar.