# 1995 Edinburgh
The utilisation of underpressure electro-fusion Branch Saddles in gas and water distribution mains is well known and documented. To date the largest known Branch Saddles have been used for offtakes not greater than 125 mm . The advent of much larger underpressure Branching Saddles has enabled the industry to significantly reduce the cost of providing services when compared with the traditional methods of introducing a tee section by cutting into existing mains, operating by-passes and having to contend with large excavation, necessitating additional re-instatement costs. This paper provides the information that indicates the savings to be made by employing the new Large Diameter Branching techniques.
Author(s) : Lonnie Corley, Dane Chang, Harvey Svetlik, Matt Brandes, Thomas Musto, Frank Schaaf, David Fink
This paper presents a brief overview of a challenging project at the Callaway Nuclear Power Plant where HDPE was utilized to replace degraded steel buried piping in a Safety Related water system. Callaway was the first Nuclear Power plant to obtain NRC approval and successfully place the HDPE piping system into...
Author(s) : Bircumshaw, Orchard, Kenworthy, Stafford
Funded by a UK government “SMART” award, the authors have explored the design options and practical solutions for installing large diameter multiple pipe ducts over very long distances. The work has involved consideration of the groundwork problems of microtunnelling or directional drilling at up to 1.5m (60ins)...