IGEM/UP/1 Edition 2 +A: 2005 - Hard copy
These procedures cover strength and tightness testing, and direct purging, of pipework not exceeding MOP of 16 bar and apply to any section of pipework including any appliance/plant pipework:
- For Natural Gas, from the outlet of the ECV (fitted on the end of the gas service that is owned by the GT)
- For Liquefied Petroleum Gas, from the outlet of the bulk storage vessel or cylinder valve
- For other gases on customers’ premises, from the outlet of the isolation point from a distribution point.
They apply to strength and tightness testing in the following circumstances:
- New pipework
- Alteration to, replacement of, reuse of, or upgrading existing pipework
- New extensions to existing pipework
- Prior to any work on existing pipework
- Where there is a known or suspected gas leak in the 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 reuse 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 the pipework
- Where pipework is to be taken out of service temporarily or permanently.
Certificate pads
The following blank triplicate certificates (in pads of 25) are available to purchase:
StT/UP/1 - Certificate of strength testing for IGE/UP/1
TT/UP/1 - Certificate of tightness testing for IGE/UP/1
DP/UP/1 - Certificate of direct purging for IGE/UP/1