ips Selection of materials PVC-U: Unplasticised Polyvinyl Chloride General properties of PVC-U

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1 Selection of aterials Unplasticised Polyvinylchloride (PVC-U) is one of the oldest and ost widely used plastics for piping systes worldwide. It is a highly versatile aterial that is used for both pressure and drainage piping systes for above and below ground applications. It is an aorphous theroplastic aterial with good tensile, flexural and echanical strength, low oisture absorption, good flaability characteristics, and exceptional diensional stability. General properties of PVC-U PVC-U has excellent cheical resistance across its operating teperature range of 0 C to 60 C, with a broad band of operating pressures. In addition, because of its long ter strength characteristics, high stiffness and cost effectiveness, PVC-U systes typically account for a large proportion of theroplastic piping installations. Consequently, PVC-U systes feature the widest range of pipe sizes, fitting configurations, valves choices and ancillary ites copared to all other theroplastic piping aterials. PVC-U piping systes are joined by solvent ceent welding, whilst transition joints can be ade using flanges, threaded connections, echanical fittings, and copression fittings. PVC-U piping systes are available fro IPS in both inch and etric diensions, according to BS, ASTM and ISO standards. Systes are available in inch sizes up to 24, and etric sizes up to 630. Pipes, fittings and valves are available in grey, white and clear PVC-U. PVC-U exhibits theral stability in the teperature range 0 C to 60 C, however at low teperatures the ipact strength of PVC- U decreases. It is therefore not recoended for use at very low teperatures unless there is no likelihood of the piping aterials being disturbed or subjected to ipact daage. PVC- U is free fro toxic etals thus ensuring that it is physiologically harless for drinking water and foodstuffs applications. Soe iportant advantages of PVC-U are: - Extensive choice of coponent parts - Wide range of applications - Good cheical and corrosion resistance - Safe for potable water applications - Low friction loss - Self extinguishing - High echanical strength - Siplified installation techniques using solvent ceent welding - Approved for potable water applications IPS Flow Systes l Seaha Grange Industrial Estate l Seaha l SR7 0PT l England l Tel: l

2 Selection of aterials Materials PVC-U piping systes are produced without plasticizers and fillers, however for injection oulding purposes lubricants are added to assist in the production of coplex parts, and to cobat the effects of UV light, stabilisers are added. PVC-U is produced by the polyerisation of vinylchloride, a gaseous onoer. Technical products anufactured fro PVC-U can have a onoer content of 0.1pp, which is considerably less than the specified liits. Owing to the high chlorine content of PVC-U, it does not support cobustion after reoval of a flae, and thus PVC-U falls into the class V-0 according to UL94. Properties of PVC-U (Average values) Property Value Unit Density 1.38 g/c 3 Tensile Strength 55 N/ 2 Elongation at Break > 30 % Ipact Strength No crack kj/ 2 (23 C) Modulus of Elasticity (Young s Modulus) 3000 N/ 2 Coefficient of Linear Expansion 0.08 / C Maxiu Operating Teperature 60 C Miniu Operating Teperature 0 C Vicat Softening Point > 76 C(VST/B 50) Water Absorption < 4 g/c 3 Surface Resistance Approx Ω Theral Conductivity W/ K Flaability V-0 UL94 Colour 7011 Dark Grey RAL Cheical resistance PVC-U displays excellent cheical resistance to a wide variety of coonly encountered industrial cheicals, such as acids, bases and salt solutions. Resistance to sodiu hypochlorite solutions is also very good. PVC-U is not resistant to aroatic and chlorinated hydrocarbons, solvents, esters and ketones. The cheical resistance of PVC-U should be checked with our technical departent for applications involving varnish, oils or fats, and PVC-U is not recoended for use with copressed air or gases. For guidance on the suitability of PVC-U for your application, consult the cheical resistance tables or our technical departent. Weathering resistance With the use of additives such as ultraviolet absorbers, PVC-U systes display excellent weathering resistance to the long-ter effects of sunlight, wind and rain. Over tie, grey PVC-U will lose soe of its colour because of exposure to UV light, and it will have slightly reduced ipact strength. In extree cases, the use of insulation or an application of a UV absorbent coating such as AGRU Coat, or the use of a water or latex based paint will help to iniise the effects of solar radiation. Solvent based paints should not be used on PVC-U piping. For outdoor installations, or where the aesthetic appearance of the piping syste is iportant, a fully atched syste of UV stabilised white PVC pipes and fittings is also available. Electrical characteristics PVC-U is non-conductive, therefore systes will reain free fro electrolytic corrosion. Precautions should be taken to avoid static discharge should any part of a PVC-U piping syste pass through an area where explosive gases ay be present. Physiological characteristics PVC-U piping systes fro IPS are free fro lead, cadiu or other poisonous heavy etals. They are suitable for use in contact with cold potable water, and are WRAS listed for this application. IPS Flow Systes l Seaha Grange Industrial Estate l Seaha l SR7 0PT l England l Tel: l

3 Selection of aterials Pressure ratings for PVC-U pipe, fittings and valves For guidance, the following table gives an indication of the pressure ratings for PVC-U pipes, fittings and valves. The pressure rating of individual ites should always be verified with our technical departent before installation. Product Size Pressure Rating at 20 C PVC-U Pipes Class C bar PVC-U Pipes Class D 1 1 / bar PVC-U Pipes Class E 3/ bar PVC-U Pipes Sch 40 1/ bar bar * PVC-U Pipes Sch 80 1/ bar bar * PVC-U Pipes PN bar PVC-U Pipes PN bar PVC-U Standard Inch Fittings 3/ bar bar * PVC-U Industrial Inch Fittings 1/ bar bar * PVC-U Standard Metric Fittings bar bar * PVC-U Industrial Metric Fittings bar bar * PVC-U Ball Valves 3/8 /16-6 / bar bar PVC-U Diaphrag Valves 1/8 /20-8 / bar bar PVC-U Butterfly Valves 1 1 /2 /50-12 / bar 16 * Pressure rating dependant on diaeter Pressure ratings for theroplastic pipes are deterined in a water environent at a teperature of 20 C. As the teperature of the edia (and/or the piping environent) increases, the theroplastic aterial becoes ore ductile, causing a decrease in the tensile strength. Because of this, the pressure rating of the syste ust be reduced as the teperature rises to allow for safe operation. The application liits for PVC-U piping aterials are shown in the following diagra: Application liits of pipes and fittings ade of PVC-U (25 years of operation with design factor of 2.5 for etric and 2.1 for iperial incorporated) 15 CLASS E CLASS D PN10 9 CLASS C P PN16 3 PN10 CLASS E 2 CLASS D 1 CLASS C P - Perissible pressure in bar T - Teperature in C PN16 T IPS Flow Systes l Seaha Grange Industrial Estate l Seaha l SR7 0PT l England l Tel: l

4 1 /8" 1 /4" 3 /8" 1 /2" 3 /4" 1" 11/4" 11/2" 2" 21/2" 3" 31/2" 4" 5" 6" 8" 10" 12" 14" 16" 18" 20" 24" PVC-U pipe availability: inch sizes ASTM D 2241 ASTM D 1785 BS 3505 BS EN 1452 Class SDR 41 SDR 26 SDR 21 SDR 13.5 Sch 40 Sch 80 Sch 120 Class B Class C Class D Class E Class 7 PN9 PN12 PN15 Colour White White White White Wh&Grey Grey Grey Grey Grey Grey Grey Grey Grey Grey Grey O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () * 75.0* Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () * 140.0* 140.0* 140.0* Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) * DIN 8061/2 IPS Flow Systes l Seaha Grange Industrial Estate l Seaha l SR7 0PT l England l Tel: l

5 PVC-U pipe availability: sizes EN 1452 DIN 8061/ Type PN 6 PN 7.5 PN10 PN 12.5 PN 16 PN 20 PN 4 PN 6 PN 10 PN 16 PN 20 O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Weight/ (kg) O.D. () Wall () Weight/ (kg) O.D. () Wall () Weight/ (kg) O.D. () Wall () Weight/ (kg) O.D. () Wall () Weight/ (kg) O.D. () Wall () Weight/ (kg) O.D. () Wall () Weight/ (kg) O.D. () Wall () Weight/ (kg) O.D. () Wall () Weight/ (kg) O.D. () Wall () Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) O.D. () Wall () Max WP (bar) Weight/ (kg) IPS Flow Systes l Seaha Grange Industrial Estate l Seaha l SR7 0PT l England l Tel: l