Machines and Tools for PE Jointing

Apart from the right process, you need to use the correct machines and tools to achieve reliable joints. Following is a list of the required equipment: 1. Good quality and calibrated welding machines, such as Electrofusion or Butt welders. Always ensure your machines are regularly serviced, calibrated and in good condition. 2. Good quality mechanical peeling tools for the essential removal of the oxide layer on the PE pipe. Make sure that you are peeling the pipe to a minimum depth of 0.2 – 0.4mm and refrain from using “paint scrapers”. 3. Good quality and high concentration alcohol wipes to clean the fusion area surface. It is recommended that you use a minimum of 80% concentration alcohol wipes. Clean only the peeled area and avoid contact with the unpeeled pipe surface. 4. Good quality and robust pipe support clamps are essential for the welding process and to achieve a stress free joint. These tools help make the jointing process easier and totally leak free if the recommended and correct procedures are used. If you are not using the correct equipment you risk a polyethylene joint failure due to improper installation...

Dealing with sodium hypochlorite

Traditionally, most piping systems have some form of air relief valve or venting system to deal with the gas that is released by sodium hypochlorite during hot climatic conditions. Without some form of venting system, the trapped gas could cause an explosion. To help provide extra safety in UPVC piping systems that use sodium hypochlorite Georg Fischer has released a vented ball valve option using the existing and well-known T546 ball valve from 15mm to 100mm. The vented ball valve incorporates a modified ball. The vent is designed as a hole through the side of the ball. When turned to the closed position, the hole allows any liquid or gas in the ball to flow freely out of the ball. The direction of the valve is to be installed,  as to the arrow marking with the liquid direction of the fluid , so when the valves is closed it simply vents away upstream. If you are installing a piping system for use with sodium hypochlorite, install only hard pipes. Schedule 80 UPVC pipes and fittings with a dytex jointed cement system are recommended. Refrain from threading the joints as these will have a tendency to leak over time and reduce the structural integrity of the system. If you are using metal in any part of the construction, i.e. instrumentation flow meters etc, only use titanium or tantalum...