SUMMARY
Replacement is undertaken from a remote location (10m - 13m) to where it intersects its parent pipeline, usually from a side road into the main carriageway.
The principal of the operation is to insert the new polyethylene (PE) pipe into the old iron main. All activities associated with the live transfer process are accessed through a 'glanding box' that enables a gas controlled operation. A two-part nose cone is installed onto the leading end of the PE pipe. The outer part of the nose cone is used to decommission the iron main as the new PE pipe is inserted to its required location. The primary gas seal is achieved by the introduction of an annular sealant. The new PE pipe is commissioned by the withdrawal of the inner section of the nose cone.
| Applications:
- Approved to UK gas industry standards for use up to 75mbar operating pressure.
- Replacement diameters: 55mm in 3'', 75mm in 4'' and 125mm in 6'' metallic pipes.
- Maximum insertion length 13m.
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Benefits:
- Significantly reduces excavation, reinstatement and associated activities.
- Significantly reduces the use of traffic management systems.
- Reduces inconvenience to the road user.
- Reduces working in higher risk locations.
- Reduces the time consumers are without gas.
- Reduces operational cost.
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Sealback® is offered with a complete product support package including contract service.