DN-25 Double squeeze off up to 63mm

• Site conducted

• Conducted on

  Date

• Prepared by

• Location
  Address

• Operative being assessed

• 1 DN-25 - Single / Double squeeze-off (PE) up to 63mm

• O = Observed K = Knowledge S Simulated

• Actions on site

• Checks diameter, Standard Dimension Ratio (SDR), material type and the pipe for roundness

  Yes

  No

  N/A

• Re-rounds if necessary

  Yes

  No

  N/A

• Question - Whereabouts on the PE pipe can this information be found?

• Answer - It is printed along the length of the pipe at 1metre intervals on each side of the pipe

• Cleans the service where the squeeze-off will take place

  Yes

  No

  N/A

• Ensures the correct distance is maintained from the existing fittings, joints, squeeze-off applied locations and any proposed future joints used for connection purposes in accordance with current SGN procedures

  Yes

  No

  N/A

• Establish network pressure

• Establishes the network pressure

  Yes

  No

  N/A

• Question - What is the maximum pressure and diameter of PE where a single squeeze-off can be used?

• Answer - 2bar and a maximum service diameter of 63mm

• Sets the stops to the correct pipe size and SDR

  Yes

  No

  N/A

• Question - What action is to be taken with the squeeze-off tool if it is not possible to identify the SDR of the pipe and what action is to be taken if the squeeze-off fails and gas passes?

• Answer - Set the stops to the size of the pipe and checks that there is no gas passing. If this fails release the squeeze-off sufficiently to adjust stops to next smallest size

• Places squeeze-off(s) on the service at the correct position

  Yes

  No

  N/A

• Slowly operates squeeze-off until it reaches the safety stops

  Yes

  No

  N/A

• Releases pressure downstream of the squeeze-off(s) and confirms that gas is not passing

  Yes

  No

  N/A

• Carries out necessary work operation

  Yes

  No

  N/A

Sign off

• Name of assessor

  Yes

  No

  N/A

• Pass or refer for additional training

  Pass

  Fail

  N/A