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This Gas Industry Standard specifies the minimum requirements for standard weld end preparations for steel pipe, valves, fittings and pipe pups. This standard does not preclude the use of other weld end preparations for specific situations if permitted by the codes and standards which are applicable at the time.

This part of GIS/PL2 specifies requirements for squeeze-off tools and equipment used in the maintenance of polyethylene systems constructed from pipe of nominal size 16 mm to 800 mm inclusive and conforming to GIS/PL2-2 and GIS/PL2-8.

This GIS specifies requirements for rotary type compressors be used for ‘within grid gas compression’, owned and operated by Gas Distribution Networks.

This Gas Industry Standard* sets out requirements for Pig traps, Insulation Joints (IJs), Test ends and Pigs for use on steel pipeline systems operating on natural gas pressures greater than 7 bar and normally in the temperature range -20°C to 50°C. *Hereinafter referred to as 'this specification'.

This GIS specifies requirements for on-package equipment requirement and design of gas compression machinery to be used for ‘within grid gas compression’, and owned and operated by Gas Distribution Networks.

This GIS outlines the general requirements and scope of supply for off-package equipment for gas compression machinery to be owned and operated by Gas Distribution Networks.

This GIS specifies requirements for Low Speed Reciprocating Piston Compression Package requirements to be used for ‘within grid gas compression’, and owned and operated by Gas Distribution Networks.

This GIS specifies requirements for High Speed Reciprocating Compression Packages to be used for ‘within grid gas compression’, and owned and operated by Gas Distribution Networks.

Note: This is an interim specification which is still under development. Fittings may continue to be assessed against, and certified for conformance with, either GIS/F7: 2006 or GIS/F7:2021 until a replacement specification for both documents is published.

This Gas Industry Standard specifies requirements for the components used in external press fit stainless steel network riser systems supplying multiple occupancy premises with natural gas in accordance with IGEM/G/5 at pressures up to and including 75 mbar and diameters up to 108mm.

This Gas Industry Standard (GIS) specifies the requirements for new unfired pressure vessels, manufactured from carbon, ferritic alloy and austenitic stainless steels.

This GIS specifies additional and modified requirements for the manufacture of pipe to BS EN ISO 3183 PSL 2, for maximum operating pressures up to 7 bar and in the standard sizes specified

This Gas Industry Standard (GIS) defines the characteristics of, and performance requirements for, single or twin ferrule compression fittings made of stainless steel. The ferruled connectors in this standard are suitable for use with fully annealed stainless steel tubing in conformance with ASTM A269.

This part of GIS/PL2 specifies requirements for polyethylene pipes, with a strength classification of PE100 1) in the nominal size range 16 mm to 800 mm inclusive for use at operating pressures not greater than 7.0 bar and operating temperatures in the range of 0 °C to 40 °C.

This Gas Industry Standard (GIS) specifies general design, materials, and performance testing of spring-operated diaphragm slamshut valves of both stand-alone and integral types with inlet pressures greater than 75 mbar up to and including 100 bar, and temperatures in the range –20 ºC to 60 ºC inclusive.

This specification contains the requirements for the welding of carbon, carbon manganese and low alloy steels used in the construction of onshore natural gas installations designed to operate at pressures greater than 7 bar in accordance with the recommendations given in IGEM/TD/1 and IGEM/TD/13 in the UK or IS 328 in the Republic of Ireland.

This Gas Industry Standard specifies requirements for the performance of leak repair systems applicable to all grades of Polyethylene (PE) gas mains operating at pressures up to 2 bar in the UK, and up to 4 bar in Ireland. The specification is for the repair of PE pipe sizes 63 mm up to 355 mm (all pipe SDRs) within the installation temperature range of -5°C to 30°C.

This Gas Industry Standard (GIS) specifies the requirements for plastics bodied polyethylene valves of sizes up to and including 180 mm for use at operating pressures not exceeding 5.5 bar and operating temperatures in the range -20 °C to 40 °C, capable of connection to the polyethylene pipe system by electrofusion jointing over a temperature range of -5 °C to 30 °C. It is applicable to valves that are to be buried.

This GIS consists of the following parts and sections relating to bolting, threading, fasteners and gaskets for all pressure retaining joints on the Gas Transporter Network. The Specification covers joints, typically flanges, which includes Class, Pressure Nominal (PN) and legacy designations for both new and replacement plant.