System Maintenance & Performance # 2004 Milan
The United Kingdom has one of the oldest and most developed gas transportation systems in the world. Today, its policy is to use polyethylene (PE) as the preferred material for the safe and efficient transportation of natural gas for operating pressures up to 7 Bar. Transco are the largest gas transporter in the UK with 258,000 kilometres of distribution gas pipeline (up to 7bar operating pressure) comprising of 130,000 kilometres of PE and 128,000 kilometres of iron and steel pipelines (mains). The distribution system provides gas to 20 million service installations. In a liberalised gas market the replacement of iron mains is subject to strict regulation that provides a business strategy to reduce costs, maximise asset value and increase system integrity. The use of PE pipe in conjunction with ‘no-dig’ technologies has significantly contributed to this strategy over the past decade. Sealback™ is a remote live transfer technique that has been developed for the rehabilitation of low-pressure iron gas mains that are situated in locations which have restricted access. Illustration of the ‘Sealback™’ system This paper describes the Sealback™ system, which has been successfully developed in the UK and provides an update of Serviflex™ – A flexible solution for the renovation of small diameter service pipes, first reported at PPX, Gothenburg in 1998.
Author(s) : Morgan, Hill
Transco, part of the Lattice Group, is the largest Public Gas Transporter in Great Britain. It currently operates a Distribution system of some 250,000 kilometers. Developments in polyethylene pipe technology have led to an ongoing increase in the size of pipe being laid in the U.K. Currently, pipes up to 630 mm...
Author(s) : Morgan, Muckle, Scott
A three way partnership has resulted in the development of a new solution to the refurbishment of old iron and steel gas service pipes. The solution which has been developed allows a flexible polyethylene replacement pipe to be inserted into the old pipe system. This avoids the need for the costly excavations or...
Author(s) : Morgan
During talks with personnel from Redlands Reinforced Piastics Ltd. (part of the Redland Group of Companies), the process of machining plastic reinforced pipe end-forms was discussed with a view to improving manufacturing efficiency. Traditionally Redlands manufacture 65% to 70% glass reinforced plastic pipes which are...