Strength The system is suitable for use in working applications up to 12 bar / 20 degrees centigrade (6 bar / 90 degrees centrigrade). Pipes are suitable for bending to a radius of 12 x diameter when unsupported or 8 x diameter when supported. Connections and fittings are tested too BS 7291: Class S for thermal cycling test, long term pressure tests, rapid pressure test and pull-out strength. System Malfunction Temperature Polyplumb pipes and fittings are tested to BS 7291@ Parts 1 and 2, which incorporates a pressurised thermal cycling test and a test regime at temperatures of 114 degrees centigrade and 3.5 bar pressure for 1,000 cycles at a duration of 30 minutes per cycle. Gases The polyplumb system is not suitable for the transportation of gases. Standard Polyplumb pipe is Oxygen permeable and is suitable for all domestic water and heating installations. Polypipe recommends that corrosion inhitors are introduced to, and maintained in, all heating systems, whether they use standard
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