DN-10 Dead Service Insertion

• Conducted on

  Date

• Prepared by

• Location
  Address

• Operative being assessed

• DN-10 - Dead service insertion

• o = Observed K = Knowledge S = Simulated

• Actions on site

• Carries out a visual inspection of the existing steel service to check for severe corrosion

  Yes

  No

  N/A

• Confirms excavations have been made at the connection point of the main or a minimum distance of 2m from the building line for insertion into the building using a compression fitting

  Yes

  No

  N/A

• Confirms the service has been decommissioned and the service purged to 0% GIA using a purge hose

  Yes

  No

  N/A

• Removes the ECV and checks for any elbows or partial blockages of the existing service pipe by inserting a flexible rod down the standpipe

  Yes

  No

  N/A

• Measures the length of the existing service and calculates the properties gas load requirements

  Yes

  No

  N/A

• Calculates the diameter of the replacement service and confirms that the diameter of the existing service is suitable for dead insertion in order to determine the maximum pressure drop allowable for the complete length of the service pipe

  Yes

  No

  N/A

• Ensures the existing service pipe has no debris or restriction inside thus preventing insertion

  Pass

  Fail

  N/A

• Question - What can be done to clear any debris or restrictions inside the existing service pipe?

• Answer: Remove any restriction (bends etc.) and/or clear the pipe by using a wire brush or by introducing air from inside to the outside

• Plugs the leading end of the PE using a bullet type nose cone to assist insertion and preventing debris from entering the pipe

  Yes

  No

  N/A

• Checks an effective form of communication is established before undertaking starting the insertion process

  Yes

  No

  N/A

• Inserts the pipe using a pipe pushing machine or by hand, takes care when pushing through bends to ensure that the PE pipe does not kink or become trapped

  Yes

  No

  N/A

• Ensures that at least 1 metre of PE pipe is visible beyond the standpipe and carries out a visual inspection for damage

  Yes

  No

  N/A

• Question - At what percentage of scoring of the wall thickness must the PE not be used?

• Answer - Greater than 10%

• Cuts back sufficient pipe and fits service head adaptor in accordance with manufacturer’s instructions

  Yes

  No

  N/A

• Ensures that there is an IECV or insulation joint fitted to the service head adaptor, if required

  Yes

  No

  N/A

• Connects the PE service pipe to the main or live inserted PE pipe within the garden

  Yes

  No

  N/A

• Carries out a pressure test in accordance with current SGN procedures

  Yes

  No

  N/A

• Commissions / purges the services in accordance with current SGN procedures and tests all untested <br>joints using approved leak detection fluid

  Yes

  No

  N/A

• Seals the end of the old service using an approved method and fills the annulus with correct quantities <br>of approved annular sealant in accordance with the manufacturer’s instructions

  Yes

  No

  N/A

• Fits any electrical insulation onto the steel pipe as per current SGN procedures

  Yes

  No

  N/A

• Completes service information label and attaches it to the ECV

  Yes

  No

  N/A

Sign off

• Name of assessor

  Yes

  No

  N/A

• Pass or refer for additional training

  Pass

  Fail

  N/A