Supporting the gas industry since 1863
Sign In

IGEM/UP/1B

Tightness testing and direct purging of small Liquefied Petroleum Gas/Air, Natural Gas and Liquefied Petroleum Gas installations

This Standard covers tightness testing and direct purging of pipework containing either LPG/Air, NG or LPG and applies to any section of pipework, including meters, having the following:

  • MOP at the outlet of the emergency control valve not exceeding 2 bar for NG and LPG/Air and
  • A nominal bore of not greater than 35 mm and
  • A maximum badged capacity through the primary meter of not exceeding 16 m3 h-1 and
  • A maximum installation volume supplying an individual dwelling or non domestic premises of 0.035 m3 and
  • LPG/Air Installations - OP at the outlet of the primary meter and any point in the section to be tested not exceeding 21 mbar or
  • NG Installations - OP at the outlet of the primary meter and any point in the section to be test not exceeding 21 mbar or
  • LPG Installations - OP at the outlet of the final stage regulator and any point in the section to be tested not exceeding 37 mbar.

They apply to tightness testing in the following circumstances:

  • New pipework
  • Alteration to, replacement of, re-use of, or uprating existing pipework
  • New extensions to existing pipework
  • Prior to any work on existing pipework
  • Where there is a known or suspected gas leak in pipework
  • Where there has been a complete loss of pressure for any reason
  • Routine testing of existing pipework
  • Immediately before purging pipework (except when taking pipework permanently out of service)

And to direct purging in the following circumstances:

  • New pipework
  • Alteration to, replacement of or re-use of, existing pipework
  • New extensions to existing pipework
  • Where there has been a complete loss of pressure for any reason
  • Where there is the possibility of air being present in pipework
  • Where pipework is to be taken out of service temporarily or permanently

 

Follow Us on:

Follow us on FacebookFollow us on TwitterFollow us on LinkedInFind us on YouTubeFind us on Flickr