Galles & West Utilities Slash Pipe Wastage With New 500metre Coil Trailers

The move is part of WWU’s on-going agenda of reducing pipe wastage and maximising the benefits of insertion techniques as part of the Mains Replacement programme . The company worked with one of its key suppliers, Steve Vick Internazionale, on the development of the new trailer.

“Using traditional 120m coils we were experiencing a pipe wastage rate of 20% all'anno, which is average for the industry”, says Andrew. The wastage of PE pipe, particolarmente nei diametri 63 millimetri, 75mm e 90 millimetri, is the result of left-over pipe on the coil being of insufficient length for insertion purposes. “Now, being able to use 500 metre coils”, he continues, “has enabled us to cut pipe wastage from 20% a 7% which represents a very considerable improvement on the bottom line”.

Although longer coils are not new to the Gas industry, historically trailers have struggled to handle them effectively. Nigel Tonge, Account Manager of Radius Systems who supplied the 500m coils, comments on WWU’s pioneering investment in the 90/500 rimorchi, saying, “It’s clear to see there is great potential in working with 500m coils. We look forward to supplying further networks in the near future and collectively assisting in a more cost effective and economic way of working for the industry”

Other cost savings of using 500 metre coils and the new trailer include the time saved in not having to fuse pipe together on long pushes. Fewer pipe fittings are used and less excavation is required for connection pits. Also, the cost of collecting coils from the manufacturer and delivering them to site is reduced as fewer trips are required and time is saved in loading and testing coils.

New hexagonal drum frame
Called the 90/500, this trailer is a completely new design from Steve Vick International, the company which began manufacturing pipe coil trailers in the 1980s and is now acknowledged as the UK’s leading producer. Con una struttura tamburo esagonale, il tamburo centrale viene spostato tra il carico, trasporti e le posizioni di erogazione da parte idraulica, consentendo uno operante per effettuare queste procedure. Il metodo di rimozione e sostituzione delle barre tamburo (ci sono sei – due in meno rispetto a precedenti rimorchi Steve Vick) per caricare la serpentina è stata semplificata ed è ora anche un solo operatore.

The new trailer has a number of key advantages besides its cost-saving 500 metre capacity. A causa della configurazione migliorata tamburo centrale, tubo viene erogato più veloce, più veloce e più fluido rispetto a rimorchi senza tamburo centrale. Unused pipe is easily re-coiled for use on another project. Quando la bobina è completamente supportato dal tamburo esagonale, ri-avvolgimento è un processo con una sola mano.

Con la sicurezza di primaria importanza, Le operazioni di carico e di erogazione sono effettuate da terra con questo trailer evitando la necessità di agenti di salire sul telaio o mettere le mani all'interno dell'area tamburo rotante. Una volta caricato sul tamburo, un 500 coil metro di tubo in PE può essere facilmente ruotato manualmente per consentire il posizionamento del bordo anteriore prima erogazione.

Un disco di freno a tamburo centrale, quale è applicato meccanicamente, è stato montato per controllare l'energia immagazzinata nella bobina ed evitare la rotazione libera del tamburo durante l'erogazione e ribobinatura e durante il caricamento tamburo bar.

Lightweight and easy to tow
Nonostante la sua grande capacità, Steve Vick 90/500 trailer weighs only 1900kg fully laden enabling it to be towed by a typical long wheelbase transit vehicle. La combinazione del suo peso leggero e singola axel rendere il trailer altamente manovrabile. The trailer is fully compliant with GIS E49.

Summing up the introduction of the new trailers, which will soon be available in each of the six Western Gas Alliance depots, Paul Breakey, Deputy Operations Manager, dice, “We are keen to maximize the use of insertion techniques in our mains replacement programme, particularly using 63mm, 75mm and 90mm PE. We were purchasing coiled pipe in predominantly 120 metre coils although this is not a convenient length for most insertions. On the majority of projects, the unused section of pipe was discarded as it was not suitable to use on the next insertion.

“Taking delivery of the new trailers”, continues Paul, “and using the extended length coils will not only reduce pipe wastage but bring other cost savings in terms of increased productivity. As we are planning to step up the abandonment of small diameter mains during 2012, there will be even further opportunities to cut wastage”.

90 500 Trailer - website_5481

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