2. What is plastic pipe ?
Types of plastic piping
Why plastic pipe ?
Plastic pipe and fittings
PVC (why pvc is so common)
Cutting and joining
3. What is mean by plastic pipe ?
Pipe formed from a material that contains one or more organic polymeric
Plastic pipework is used for the conveyance of drinking water, waste
water, chemicals, heating fluid and cooling fluids, foodstuffs, ultra-
pure liquids, slurries, gases, compressed air and vacuum system
The first PVC pipes were introduced in the 1930’s for use in sanitary drainage
systems. Polyethylene was developed in 1933 and one of its first applications was
cable protection for radar insulation during WW2
The 1950’s saw the first pressurised plastic drinking water pipes installed in the
Netherlands and production of the first plastic valve.
During the 1960’s rain water pipes, guttering and down pipes using plastic
materials were introduced into the housing development market.
The 1970’s also saw the introduction of plastic pipes being used in highway
drainage, the introduction of plastic cable ducts and the introduction of the first
yellow HDPE pressure pipe for gas supply introduced in conjunction with British
The 1980’s saw the introduction of HDPE pressure pipes for water and the use of
blue pigmented MDPE material for potable water for the UK water industry.
In the 1990’s plastic plumbing pipework was first used in underfloor heating
In 2001, 7% of new domestic properties were built using plastic pipework for the
hot and cold plumbing systems and by 2007, this had increased to 90%. The plastic
pipe industry heavily invested in making plastic pipework products sustainable and
reducing their carbon footprint.
6. Types of plastic piping
Solid wall pipe
Extruded pipes consisting of one layer of a homogeneous matrix of thermoplastic
material which is ready for use in a pipeline
Structured wall pipe
Structured-wall pipes and fittings are products which have an optimized design with
regard to material usage to achieve the physical, mechanical and performance
requirements. Structured Wall Pipes are tailor made solutions of piping systems, for a
variety of applications and in most cases developed in cooperation with users
Pipe incorporating a flexible metallic layer as the middle of three bonded layers.
7. Types of plastic pipe (material)
ECTFE (Ethylene Chloro TriFluoroEthylene)
9. Why use plastic pipe systems ?
Long Life Time
Ease of Installation & Repair
10. Plastic pipe and fittings
Plastic pipe may be flexible or semi-rigid. It is available in 100 foot coils or 10 and
20 foot lengths, 3/8 inch to 16 inches in diameter.
Plastic pipe grades are schedule 40, pressure pipe, and non-code pipe.
Schedule 40 is plastic pipe manufactured to the same standard shapes and sizes as
steel pipe with fittings to be used for DWV and some water lines.
Pressure-rated pipe has the maximum pressure marked on it and is used for water
Non-code pipe is lightweight pipe used for septic tank leach fields and outside
why pvc has become so common ?
light in weight as compared with other pipe materials (handling)
easy to work with and join together
comes in stock lengths like 10 or 20 ft.
Widely accepted by codes
13. PVC pipe markings
The outside of PVC pipe must be labelled as follows:
Manufacturer's name or trademark (e.g. PPFA)
Standard to which it conforms (ASTM)
Material designation code
Pressure rating if for pressure
SDR number or schedule number
If the pipe is for potable water, a laboratory seal or mark attesting to suitability for potable
For those standards that cover several products, there must be additional markings to indicate
the pipe stiffness number, the SDR, the EB or DB number. A certifier's mark may also be on the
14. Cuting and joining of plastic pipe
Unique way to cut plastic pipe
Joining of pipe
Low resistance against high pressure
Low resistance against high temperature
Poor fire resistance
The susceptibility to change as a result
of prolonged exposure to sunlight.