Applications & Jointing # 1995 Edinburgh
At this Conference, the main focus is on the pipe : hardly surprising since this forms a large part of the material cost of a sewer, water, gas or fuel line. However, the pipe is often only a small part of the total cost of a pipeline installation. It is the jointing of the pipes to each other and to valves and pumps etc., using a variety of jointing methods, together with the installation that converts the pipes into a usable pipeline system and network.
There are a number of matters that must be considered when designing or selecting the components for a pipeline system :
- material type;
- fluid being carried;
- jointing system;
- type of installation;
- economics of the installation.
Each of these issues will be briefly discussed
Author(s) : Stokes, Potter, Muhl, Acland
Research indicates that the scoring of polyethylene pipes that can occur during directional drilling operations in clay soils will not exceed the specification of 10% pipe wall scoring depth. However, a higher level of damage may occur in different types of soils from these operations. Further investigations from...
Author(s) : Stokes, Potter, Metcalfe, Bowman, Graham
The response of three different forms of polyvinyl chloride (PVC) pipe has been explored when the pipes had attached to them ferrule straps. Pipes were subjected to fluctuating internal pressure (fatigue) loading at 20°C, and the lifetimes, location of any failures and the types of failures recorded. Tests were made...
Author(s) : Stokes, Edwards
The paper examines the business and regulatory background to the infrastructure investments anticipated in the next few years, from the point of view of a major UK Water Company. Past performance of the use of plastic pipes for sewers and water mains are examined. Shortcomings of the products are identified and...
Author(s) : Morris, Cant
In the UK, jetting of drains and sewers is undertaken mainly for emergency clearance of blockages, rather than planned cleaning as in some other countries. Jetting equipment has been constantly upgraded to produce higher pressures in order to provide a quicker service to customers and better return on...
Author(s) : Morris, Gill
The introduction of a new grade of polyethylene for pressure pipes has presented a challenge to the UK Water Industry. Some aspects of the performance of the pipe itself are claimed to be significantly better than those of existing MDPE grades which would offer significant economic and operational benefits. However,...