TPi September 2013

plast ic pipes and tubes

PVC and CPVC double containment Certain environments demand fail-safe systems: no leaks, no risk. Recognising the complexity of design and installation for demanding double containment applications, IPEX has a division dedicated to the design, production and installation of double containment systems. The IPEX family of double containment systems includes Guardian TM PVC and CPVC, and Clear-Guard TM PVC pressure and drainage systems, CustomGuard ® FRP and metal pressure systems, Encase TM PolyPro drainage systems, and Centra-Guard TM and PAL-AT leak detection systems. Safety and environmental concerns are priorities on today’s industrial agenda. Reduction of emissions, energy conservation and prevention of ground water contamination are some of the areas where regulations are increasingly defining an important line between utilisation and exploitation of resources. For most common chemical- waste or process applications, IPEX

A cut-away view of a component from the Guardian double containment system range

offers systems that are simple, but use advanced technologies. These systems utilise pre-assembled components that ensure reliability, ease of installation, fewer joints, and quick delivery. With material choices that include Xirtec ® 140 PVC, Corzan ® CPVC, flame and non-

flame retardant PP, the Guardian and Encase systems can handle the majority of applications.

IPEX, Inc – Canada export@ipexinc.com www.ipexinc.com

Triple wall PP pipe Italiana Corrugati SpA has developed TECH3, a triple wall polypropylene pipe with high mechanical characteristics and high reliability of sealing joints. This technique has been implemented in order to meet the needs of an increased tolerance concerning negligence in laying and operating efficiency in presence of groundwater.

layer, and smooth inside and outside. This structure allows rigidity, increasing both axial and annular (≥18kN/m 2 ). It safeguards the pipeline from lying with any point loading on the outer surface (stones and rocks), and from accidental shocks (falls, picks, etc), and the smooth surface interacts uniformly with the soil around the pipe. Junctions are realised by a socket (or coupling on request), and the socket is equipped with two pre-installed gaskets. Each seal is equipped with an internal anti-upsetting rigid ring, capable of preventing seal leakage from the seat during the insertion of the spigot. When the junction is complete there will be a volume of air between the two gaskets. A rubber valve fitted to the

socket and the device (manual pump) makes it possible to quickly and easily pre-test the tightness of the connection, by blowing air in pressure between the two seals, before backfilling. TECH3 pipe sockets are longer than the minimum values required by the standard, because they are designed to ensure greater tightness capacity and also the absorption of linear thermal expansion of the 6m pipe length when installed externally (eg under bridges), for temperatures from -10 to +40°C. This enables better performance regarding the tightness value in case of ring deformation of the socket up to 8-9 per cent.

PP belongs to the family of polyolefins – a material that is not composed by chlorine molecule and is recyclable without harm to the environment. Polyolefins are advantageous in terms of durability (abrasion and chemical resistance) and impact resistance. The construction and testing standard of TECH3 pipes is in compliance with EN 13476-2. The wall structure is triple-

Italiana Corrugati SpA – Italy www.tubi.net

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September 2013 Tube Products International