Audel Plumbers Pocket Manual by unknow

Author:unknow
Language: eng
Format: epub
Published: 2008-05-28T04:18:00+00:00

Part II

Plumbing Systems

13. PLASTIC PIPE AND FITTINGS

Plastic drain, waste, and vent (DWV) piping has been approved by local and state codes including the Building Officials Conference of America, Southern Building Code Congress, International Association of Plumbing and Mechanical Officials, and Federal Housing Administration (FHA). Following are some types of plastic pipe:

• Polyvinyl chloride (PVC)-Type-1 polyvinyl chloride is strong, rigid, and economical. It resists a wide range of acids and bases but may be damaged by some solvents and chlorinated hydrocarbons. The maximum service temperature is 140°F (60°C). PVC is better suited to pressure piping.

• Acrylonitrile-butadiene-styrene (ABS)-Usage of ABS has almost doubled compared with PVC in DWV piping systems. However, it is limited to 160°F (71.1°C) water temperatures at lower pressures, which is considered adequate for DWV use.

• Chlorinated polyvinyl chloride (CPVC)-This meets national standards for piping 180°F (82.2°C) water at pressures of up to 100 psi (689 kPa). It can withstand 200°F (93.3°C) water temperature for limited periods. CPVC is similar to PVC in strength and overall chemical resistance.

• Polyethylene (PE)-This is a flexible pipe for pressure systems. Like PVC, it cannot be used for hot-water systems.

• Polybutylene (PB)-This is flexible and can be used for either hot-water or cold-water pressure systems. Since no method has been found to chemically bond PB, solvent-weld joints cannot be used. Compressiontype joints are used instead.

• Polypropylene-This is a very lightweight material suitable for lower-pressure applications up to 180°F (82.2°C). It is used widely for industrial and laboratory drainage acids, bases, and many solvents.

• Kem-Temp polyvinylidene fluoride (PVDF)-This is a strong, tough, and abrasive-resistant fluorocarbon material. It has excellent chemical resistance to most acids, bases, and organic solvents and is ideally suited for handling wet or dry chloride, bromine, and other halogens. It can be used in temperatures of up to 280°F (138°C).

• Fiberglass-reinforced plastic (FRP) epoxy-This is a fiberglass-reinforced thermoset plastic with high strength and good chemical resistance up to 220°F (104.4°C).

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