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NSAI has launched the public consultation for the draft revision of I.S. 329 – Gas distribution mains (Edition 4).

Public consultation period: From 31st August 2023 until 13th October 2023, inclusive.

This Standard specifies the minimum requirements for the design, construction, commissioning, operation, maintenance and alteration of mains, for the distribution of 1st, 2nd and 3rd family gases, natural gas and substitute natural gas, (e.g. Bio-methane gas) as classified in I.S. EN 437 at pressures up to and including 16 bar, and decommissioning.

The distribution mains is the network of pipes which transports gas from the natural gas transmission system (see I.S. 328), LPG storage system or a gas manufacturing plant to the gas service pipes. This Standard does not apply to the installation of transmission systems, (see I.S. 328), LPG storage systems (see I.S 3216) or gas manufacturing plants. This Standard does not apply to the installation of gas service pipes, which is addressed in (see S.R. 12007-5 and I.S. EN 12007-5). All pressures quoted in this Standard are gauge pressures.

View the draft and submit comments:
All interested parties are invited to comment on the draft revision of I.S. 329 through the NSAI “Your Standards Your Say” (YSYS) forum here.