PVC (Polyvinyl Chloride)
PVC is the most frequently specified of all plastic piping materials. It has been used successfully for over 60 years. PVC is characterized by distinctive physical properties, and is resistant to corrosion and chemical attack by acids, alkalies, salt solutions and many other chemicals. It is attacked, however, by polar solvents such as ketones and aromatics. Of the various types and grades of PVC used in plastic piping, Type 1, Grade 1 PVC (Cell Classification 12454-B) conforming to ASTM D1784, is the most common. The maximum service temperature for PVC is 140°F. With a design stress of 2,000 psi, PVC has the highest long-term hydrostatic strength (73°F) of any other major thermoplastic material used for piping. PVC piping is joined by solvent cementing, threading, flanging, grooved or gasketed joints.
BENEFITS OF PLASTICS
Polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC), polypropylene (PP), polyvinylidene fluoride (PVDF), fibreglass piping and dual laminate (DL) are designed to meet the temperature, pressure and size requirements for piping systems used in chemical processes and other industry applications. Our plastic piping offers the unique combination of light weight, flexibility, durability and exceptional corrosion resistance. Substantial savings in both initial installation costs and ongoing maintenance costs are achieved through the selection and use of these quality engineered materials.
The following details the benefits of thermoplastic and thermoset materials.
Lower Installation Costs
In addition to lower material price of plastics versus metal and other conventional materials, plastic pipe can reduce labour and transportation costs on a typical installation significantly. The reason? Plastics are easily handled, stored, cut and joined. And, heavy equipment used to install metallic and other piping systems are not required, thereby reducing job costs.
Plastics are fundamentally ageless and impervious to normal weather conditions. Plastic piping systems in uninterrupted service and in a variety of demanding industrial applications have operated successfully for over 40 years. During maintenance or revisions, examinations of the original plastic materials showed excellent physical and hydraulic characteristics.
Once properly selected for your application and correctly installed, plastics provide years of maintenance-free service. Our materials will not rust, pit, scale or corrode on either interior or exterior surfaces. Unlike other types of piping, plastic systems are not adversely affected by aggressive soil or atmospheric conditions.
Exceptional Chemical Resistance
Outstanding resistance to a wide range of chemicals such as most acids, alcohols, alkalies, salt solutions, halogens and many others. However, chemical resistance is a function of concentration, pressure and temperature.
Plastic materials are immune to damage from naturally corrosive soil conditions as well as electrochemical and galvanic corrosion. This is particularly advantageous in underground installations where galvanic reaction often causes damage to metal piping products. Plastic's noncorroding properties ensure improved flow, lower maintenance costs and longer performance life.
PVC piping has a substantially lower Roughness Factor than metal and other materials, and since plastic does not rust, pit, scale or corrode, the interior walls remain smooth in virtually any service. This high carrying capacity may result in the use of flatter grades or in the use of smaller diameter pipe.
Polyvinyl chloride (PVC) and chlorinated polyvinyl chloride (CPVC) are suitable for use with potable water as listed with the National Sanitation Foundation (NSF) and Canadian Standards Association (CSA).
PVC has a recommended maximum service temperature of 140°F; CPVC, PP, and DL have a maximum service temperature of 210°F, and PVDF and Fibreglass Piping perform dependably beyond 210°F.
Lower Thermal Conductivity
With a dramatically lower thermal conductivity factor as compared to metal, plastic systems have less heat loss or gain, and sustain the temperature of the service with less variation than metal piping. As a result, pipe insulation is often not required.
With energy conservation a prime topic of the day, plastic piping materials requires less than half the energy needed to produce the equivalent size of carbon steel or steel alloy materials.
As building materials, both PVC and CPVC offer outstanding fire performance characteristics. Fire performance is rated in such categories as resistance to ignition, flame spread, fuel contribution and smoke characteristics.
One of the outstanding characteristics of PVC is its resistance to ignition. This is demonstrated by its flash ignition of 850°F, compared to 500°F for pine. Also, PVC will not burn unless an external flame source is applied, and will not sustain ignition once the flame source is removed.
In addition, PVC has a low flame-spread rate. This is an extremely important characteristic when considering building code restrictions for combustible pipe. Tests performed in accordance to CAN 4 S102.2 (The Standard Method of Test for Surface Burning Characteristics of Flooring, Floor Covering and Miscellaneous Materials), show a flamespread rating of under 15. This rating meets requirement 18.104.22.168. (5) of the National Building Code regarding the use of combustible pipe with a flame spread of less than 25 in noncombustible building types. Tests also show PVC has a fuel contribution of 0.