DN-07d – Test & purge LP service (≤ 2”/ 63mm)

• Conducted on

  Date

• Prepared by

• Location
  Address

• Operative being assessed

  Yes

  No

  N/A

• Test of LP service

• Securely caps off the opposite end of the service from the test position

  Yes

  No

  N/A

• Slowly pressurises the service using a hand pump to a minimum of 100 mbar at either the main or ECV

  Yes

  No

  N/A

• Question - How long is the stabilisation period, how long must the test be applied for and how much pressure loss is permissible?

• Answer - No stabilisation period is required and be applied for 5 minutes with no pressure loss

• Carries out the test in accordance with current SGN procedures

  Yes

  No

  N/A

• Tests all exposed joints using SGN approved leak detection fluid

  Yes

  No

  N/A

• If test is applied from main<br>Opens the ECV and checks the cap for leakage using SGN approved leak detection fluid then closes the <br>ECV. Or,<br>If test is applied from ECV (Providing there is no let-by)<br>Closes the ECV and disconnects the pressure gauge to reduce the readings to zero and applies SGN <br>approved leak detection fluid to the bore of the valve. Fits a cap to the ECV, slowly opens the valve and <br>checks for leakage then closes the ECV

  Yes

  No

  N/A

• Closes the inlet valve on the boundary service regulator or ECV on completion of a satisfactory test

  Yes

  No

  N/A

• Releases the test pressure from the opposite end from the test apparatus ensuring there is no danger of injury to themselves and any member of the public

  Select Yes No N/A

  • Yes
  • No
  • N/A

• Question - Why is it necessary to release the pressure from the opposite end from the test apparatus?

  Yes

  No

  N/A

• Answer - To ensure the whole length of the service has been tested and free from blockage
  

• Records the test result immediately in the test record book, Tablet or service job card

  Yes

  No

  N/A

Purge and commission LP service

• Attaches a flexible purge hose with a flame trap to the inlet valve of the boundary service regulator or <br>ECV and ensures the flame trap is away from any openings into the premise and away from any <br>potential sources of ignition

  Yes

  No

  N/A

• Ensures there is a means of communication between both operatives during the purge process

  Yes

  No

  N/A

• Fully opens the ECV to allow the gas purge to be undertaken<br>

  Yes

  No

  N/A

• Commissions the service by either:-<br>1. PE connection – drills the main with the integral cutter and withdraws it into the top of the <br>tapping tee<br>2. Metallic connection – withdraws the integral plug into the top of the service tee

  Yes

  No

  N/A

• Purges the service to atmosphere as per current SGN procedures

  Yes

  No

  N/A

• Question - At what point can the purge be stopped?

• Answer - Two successful tests confirming 90% gas in air at the outlet of the purge hose using a Gascoseeker or by purging
  with natural gas at a rate of one second per metre for a service pipe <32mm or four seconds per metre for up
  to 63mm diameter

• Closes the ECV, removes the purge hose and caps the ECV

  Yes

  No

  N/A

• Tightens and tests the cap/plug on the tapping tee using SGN approved leak detection fluid

  Yes

  No

  N/A

• Completes the service information label and attaches to the ECV, if required

  Yes

  No

  N/A

• Question - What action should be taken if a dual service is to be purged?

  Yes

  No

  N/A

• Answer - The purging operation must be carried out individually to ensure both services are fully purged

Sign off

• Name of assessor

• Pass or refer for additional training

  Pass

  Fail

  N/A