PVC Pipe Manufacturing: Article: Page 242

PVC Pipe

PVC Pipe Manufacturing:

PVC stands for Poly Vinyl Chloride. You can start this as small
and medium scale basis. PVC pipe nowadays a widely used material
in electrical, irrigation and construction industry.

Use of PVC pipes as electrical conduits is well accepted in the
household and industrial activities. PVC pipes have wider
acceptance for water supply.

Such as light-weight, low cost, easy installation, non-corrosiveness,
high tensile strength to withstand high fluid pressure etc.

Registration & License:
Register your business with ROC. Obtain Trade License from
Municipal authority. Apply for Factory License according to
your state rules. Obtain Vat registration. Apply for Udyog
Aadhaar MSME online registration. Apply for a ‘No Objection
Certificate’ from the state’s Pollution Control Board. Obtain
BIS certification for Quality Control. Protect your brand by
Trademark Registration. You can also apply for ISO Certification.

Following machinery are required:
High-speed Mixer, non shell type cap.50 kg. Per batch/hr.
filled with complete controls and cooling arrangement.
65 mm/18 V PVC rigid pipe extrusion plant consisting of twin
screw extruder, vacuum sizing unit, cooling tank, haul off the
unit and cutting device complete with controls and motor, etc.

Dies size 20, 25, 45, 63, 75, 90, 110 mm and mandrel size
2.5 kg/cm2, 4 kg/cm2, 6 kg/cm2, 10 kg/cm2.
Scraper, grinder, heavy duty fitted with electric Motor.

Weighing balance, heavy type industrial model with moderate
accuracy. Overhead water tank and recycling Pump units

Specific gravity lead and tin estimation (in ppm), Lab.
Equipment consisting of capacity testing apparatus, Impact
tests, compressive strength, Hydraulic pressure (long term,
short term) apparatus.

Pipe storage, racks, maintenance of small hand tools,
greasing, oiling equipment, etc.

Chemical testing laboratory equipment, Chemical balance,
oven and equipment with testing equipment, apparatus for
testing bulk density.

Raw Materials: The required major raw materials are PVC resin,
DOP, Stabilizers, Processing acids, Lubricants, Colours, Fillers.
Major utilities required are electricity and water.

PVC Pipe Manufacturing Process Flow Chart: In the manufacturing
process, various steps are taken as follows

1. Extrusion
PVC uncompounded resin, To confer the required processing and
end instability, it is necessary to mix additives with the PVC
resin. Following are some of the additives which are generally
used for the manufacture of rigid PVC pipes.

Plasticizers: plasticizer in use is DOP, DIOP, DBP, DOA, DEP,

Stabilizers: The common stabilizers are lead, barium, cadmium, tin,
stearate etc. Lubricants: Widely used lubricants are Buty-Stearate,
Glycerol Moni-Stearate, Epoxidised Monoester of oleic acid,
stearic acid etc. Fillers: Fillers are also used for producing

Plasticizers: Plasticizer in use are DOP, DIOP, DBP, DOA, DEP,
Reoplast, Paraplexetc.Stabilizers: The common stabilizers are
lead, barium, cadmium.

Fillers: Fillers are also used for producing the special
quality product (e.g. calcined clay is used to improve the
electrical properties of cable compounds).

PVC resin is to be compounded with plasticizers, stabilizers,
lubricants and fillers to improve process ability and improve
the ensure stability. PVC resin is compounded with other
ingredients in a high-speed mixer.

The compound resin is fed to the double screw extruder where
the inserts and die body for the required pipe diameter are
fitted. The PVC compounds are then passed through a heated
chamber and they get melted under the compression of the
screw and temperature of the barrel. Pipe is done at the
time of extrusion.

2. Traction: Tube traction unit is required for continuous
haulage of the pipes being extruded by the extruder.

3. Sizing: The pipes coming out from the extruder is cooled
in the sizing operation. Two types of sizing used for
manufacturing of pipes, Pressure sizing, Vacuum sizing.

4. Cutting: The last operation needed is cutting. Basically
two cutting techniques for rigid PVC pipes viz. manual and
automatic. The pipes are then tested for ISI marks.
The last step of PVC pipe manufacturing is the transport.

Wishing you all the best,