What is in a Chemical Chart?

From our last Blog we had a large interest in Chemical Resistance. GFPS has set up on the Chemical Resistance Guide which provides general information regarding chemical resistance. The chart/guide should be regarded as a valuable tool for finding the most suitable material for a given application. Any statement quoted in our chemical resistance list should be regarded as a guiding value. In particular, we would like to emphasize that such a list -by nature – cannot supply the following information: All relevant details of the respective experiment that has been the source for a given set of data Possible influence of dynamic effects Long-term effects Possible influence due to the method of processing, the thermal history as well as the exact formulation of the respective samples Behaviour of mixtures of different media or effects based on discontinuous service (Detailed) characterisation of the corrosion phenomenon / deterioration observed Derivation of the max. applicable service pressure Consideration of all chemicals To view the guide, it suggested to always refer to the online guide. The online guide is always the most informed as it will contain the latest facts. Go to www.georgfischer.com.au click into Support/ Calculation Tools/ Chemical Resistance Guide OR go directly to the guide...

Selecting your pipe material – Chemical resistance

Plastic materials are now widely used in pipeline construction. Pipes made from plastics are used not only for drinking water, water for general use and waste water, but also for the conveyance of aggressive liquids and gases. Expensive pipe materials such as lined metal, ceramic or glass, have largely been replaced by plastic pipes. It is, however, important that the most suitable plastic material is selected for each application. The chemical resistance chart from Georg Fischer Piping Systems contains all the plastics and elastomers in the GF product range which can come into direct contact with the media. The information is based on experiments, immersion and, when available, on data from tests which include temperature and pressure as stress factors. The results achieved in immersion experiments cannot be applied without reservation to pipes under stress, i.e. internal pressure, as the factor stress corrosion cracking is often not taken into consideration. In certain cases it can be of advantage to test the suitability under the planned working conditions. The tests referred to have been carried out partly by GF and partly by the Internal Standardisation Organisation (ISO) or national standards...

Hot and Cold Water Applications

Water services in buildings are complex, requiring both experience and careful material selection. The goal is to design and produce a piping system for hot and cold water supply that is easy to install and have a long, trouble free service life. PP-R (Polypropylene Random Copolymer) was developed over thirty years ago, and, today, is widely used in hot and cold water systems around the world. Its comprehensive technical performance balanced against its low cost is the main reason for its success. PP-R is suitable for all sanitary and potable water applications, as well as compressed air. Polypropylene random copolymers are thermoplastic resins produced through the polymerization of propylene, with ethylene links introduced in the polymer chain. The resins possess a broad range of characteristics and are used in a wide range of applications. Considerable growth in the use of PP-R pipe systems in new buildings has resulted in a surging demand for PPR material in expanding markets across Eastern Europe, North Africa, and Asia. It has been popular in Australia for over 10 years. PP-R offers significant benefits over traditional systems including being corrosion free and reduction in noise transmission. As long as the following considerations are allowed for, then trouble free installations should result. Allowing for expansion/contraction through expansion loops and correct bracketing Avoiding excessively high temperatures for extended periods of time Protection from UV light PP-R systems offer long-term improvements in water quality and in the reliability of sanitary systems. Simply PPR should be given serious consideration for drinking water...