PVC stand for Polyvinyl Chloride. This type has a wide variety of plumbing uses from drainage pipe to water mains. It is most commonly used for irrigation piping, home, and building supply piping. PVC is also very common in pool and spa systems. PVC is often white but it can also come in a wide variety of colours. You can often tell what it is used for by the colours and marking on the pipe. PVC also comes in a variety of thicknesses called schedules. Schedules 40 being the most common for water distribution. PVC Pipe should always be clearly labelled if it is used for both potable (drinkable) and non-potable water in the same building. PVC joins are made by using a primer that softens the PVC and then applying PVC glue that melts the joints and pipe together.
They are ideal for agriculture, industries, construction and domestic applications. Years of experience in PVC processing and ensures total quality of the products and satisfaction to the users. Wide range of pipes and fittings make a complete PVC Pressure and SWR pipe systems supplier. Pipes are produced out of extrusion process while injection moulded as well as fabricated fittings are available.
| Operating temperature | 0 - 60 degrees Centigrade (32 - 140oF) |
| Connection | Solvent cement and threading |
| Abrasion resistance | Good |
| Rigidity | Rigid - little or no flexibility esp. in larger sizes |
| Chemical resistance profile | Good with most acids, alkalis and salts. Poor with aromatic & chlorinated hydrocarbons For more information click the link below: Chemical compatibility table for PVC and Polypropylene Pipe and Fittings |
| Toxicity | Non-toxic and taint free |
Polypropylene is one of the most common, fastest growing and versatile thermoplastics currently used. Each year many tons of this material are converted into diverse products ranging from plastic bags through automobile parts to tanks and chemical piping systems.
PP is suitable for working use at temperatures up to 90ºC, and withstand short term use at a maximum 110ºC.
Waste– Over a period of many years, polypropylene has become a preferred material for handling many different types of liquid waste. This material’s wide range of chemical resistance makes it very suitable for handling the wide range of different chemicals and mixtures that are found in different waste streams. The unsuitability of polypropylene for use with concentrated oxidizing acids is generally not a problem because these acids will usually be diluted before they are disposed of. The high resistance of polypropylene to solvents is particularly important, because many solvents do not mix in water and often end up floating in a concentrated form near the top of the pipe. Thus, even though a waste stream may contain only 1% of a solvent, it is often not possible to regard this dilution because most of the solvent will often float to the top of the pipe. The material’s high temperature
capabilities are also important in enabling it to handle any exothermic reactions that may occur when different chemicals mix.
Deionized Water – Large volumes of distilled or deionized water are used by a wide range of different industries. This water is often used for diluting chemicals, washing and rinsing. Polypropylene is commonly used as a piping material for conveying this water. Polypropylene piping systems are able to maintain the purity required in all but the most demanding installations. Fusion joining gives fast reliable joining without the use of hazardous and noxious solvents that may contaminate the water. The total quantity of added lubricants and organic materials in polypropylene is far less than found in many other plastic piping materials. The use of a pigmented material is recommended to reduce degradation of the pipe material from ultraviolet light. The pigmented pipe wall will prevent the transmission of ambient light into the pipe material.
This prevents possible degradation of the pipe wall and corresponding participation of plastic into the water stream.
Caustic Solutions- The chemical resistance of polypropylene to caustic solutions such as potassium hydroxide and sodium hydroxide is very good. The fusion joining method gives strong joints that are resistant to attack by these strongly caustic solutions. This contrasts to solvent cemented joints which may be attacked by some caustic solutions.
For these reasons polypropylene is often used to transport caustic soda used for neutralizing acidic waste streams.
