Founded in 1994, UNIFLEX®  is a manufacturer of high quality HDPE pipes. Our promoters possess vast experience in diverse industries such as construction, agriculture and mining. Our strong technical capabilities and insightful market analysis has always been a driving force to our innovative product range.

When we first started out, there was a dire need for HDPE pipes of high quality and purity at affordable rates. One of our earliest products UNIFLEX®  Pe-pipes in pure white colour, the first of its kind in Indian market, was launched to meet this long-standing demand and successfully fulfilled the needs of the plumbing industry for quality HDPE pipes. Over the years, our capabilities in large diameter and solid wall High Density Polyethylene (HDPE) pipe have earned us a respectable stature in the world of HDPE pipes.

UNIFLEX®  has a state-of-the-art manufacturing plant one at HPSIDC, Industrial Area, Himachal Pradesh and second one at MIDC Butibori, Nagpur, operated by a pool of skilled technical manpower and driven by German technology. And a strict quality control system is in place to ensure that the products confirm to international quality norms. Every product is manufactured from special, high strength resins with complete quality control maintained from raw material to finished pipe product.

Initially it was G I Pipes, then PVC & Copper Pipes being used extensively for domestic water distribution system. Industry is witness today that these both systems with their limitations left an un impressive remark on users and there always existed a debate whether metal or plastics should be used for piping system.

The Year 1996 marked a beginning of special era in Plumbing Industry when Uniflex Industries an ISO 9001 company, ventured into Technology Transfer Arrangement with its German Counterpart and started manufacturing revolutionary piping system popularly known as “Uniflex Pe Al Pe Composite Pressure Pipes” for Plumbing & Gas Lines.

The State of Art PE AL PE Aluminum Composite Extrusion Line from Germany gave Uniflex that Technical Edge making it the most favorite Plumbing System of Builders, Plumbing Consultants, Engineers, Architects, House Owners & Plumbers throughout India. The concept of Uniflex Pe Al Pe Aluminum Composite Pressure Pipe as a total plumbing system offered  an economic yet a robust solution as it eliminated the Disadvantages of Metal & Plastic Pipes while retaining the Advantages of Both.

Quality Policy : 

We at Uniflex Industries are dedicated to manufacture Piping System of best quality at affordable prices to our customers’ Fullest Satisfaction in Piping / Plumbing of Domestic, Commercial & Industrial, sectors is achieved, through continuous improvement and Product Innovation.  It shall be the duty of each Employee and Channel Partner to achieve customer satisfaction through Highest Quality Products & Services.

Quality Control :

The Technical Dept is manned by several engineers having rich experience. Senior and middle level engineers, managers are responsible to ensure technical compliance. A centralized laboratory supports Incoming Raw Material Testing, In-Process Testing, Finished Goods Testing, as well as internal & external inspection. Pipes are periodically Type Tested in-house & at Independent laboratories for design compliance. The company lays emphasis on investing in latest test and measuring equipments and training its personnel.

Our Mission

“To Provide Best In Class Plumbing Systems & Solutions that compliments the ever Innovative Building & Construction Industry.”


Fresh Water Plumbing pipes are most be important in every building. Variety of piping materials are available for building water supply piping. These can be classified into – A) Metal pipes and B) Plastic pipes. Following piping materials are used in these categories:

  • Metal Pipes :GI Pipes, Copper Pipes, SS Pipes.
  • Plastic Pipes :PVC pipes, CPVC pipes, HDPE pipes, PPR pipes, Polybutylene Pipes
  • Composite pipes :Metal & Plastic combination Uniflex Pipes.

Metal pipes and Plastic pipes have their own advantages. Also, they have some disadvantages. This led to the invention of Composite pipes – eliminating all the disadvantages of both while retaining advantages and strengths of both Plastic & Metal.

A brief study of various plumbing pipe materials and parameters gives some insights into the technical demands of pipe systems essential for any kind of project / buildings.
Given below are various parameters and working requirements for sound plumbing.

1. Impact of Water Quality

The plumbing system must be capable of handling hard as well as soft water.

Metallic pipes like G.I. Pipes are susceptible to corrosion. Copper pipes also corrode when used for soft acidic water. In case of hard water, scale deposition in GI pipes leads to unsatisfactory flow over the life span of the pipe caused by incrustations (salt deposits in inner walls of pipe). Frequently the pipe has to be replaced imposing extra maintenance costs upon house owners.

Plastic pipes are unaffected by water quality issue. Multi Layer Composite pipes, with inner and outer plastic (PE) layer, have no effect of water quality and are suitable for hard as well as soft water. PE (Polyethylene) being chemically inert in nature.

2. Health

The reaction of water with the piping material is a crucial factor, usually neglected. The pipe raw materials, has some effect on the pipe during its working duration. Some of the aspects to consider are:

  • Taste & Odor of water.
  • Visual Appearance of water
  • Growth of aquatic micro-organisms.
  • Extraction of substances (Leaching) that may be of concern to public health.

On account of corrosion, metallic pipes, especially GI pipes, are to be rejected on this ground. The lead content in GI pipes further reduces the suitability for this application. In case of copper pipes solder joints and fluxes (weld material) have lead content that causes worries to one and all equally.

Composite pipes do not have this adversity to effects due to water property.

3 Thermal Strength Properties

Every pipe raw material, should have resistance to raised temperatures making them suitable for use in Hot Water distribution systems.  

Metal pipes, GI as well as Copper, have strong resistance to raised temperature applications.

Whereas in plastic piping systems, the raised temperature resistance depends upon the operating pressure, and also defines the life spanof piping system.

Thus PVC pipes are recommended only for cold water applications.

Comparing with PVC pipes CPVC pipes possess better temperature resistance, however life span needs checking.

Because of Polyethylene and Aluminum combine Composite pipes have these properties of raised temperature and life span balanced .

4. UV Resistance

Effect of UV radiation is a major criterion particularly in case of plastic pipes. Metal pipes do not have any effect of UV radiation.

PVC pipes are not supposed to be used for external piping due to the effect of UV rays.

CPVC contains TiO2, which is not as good a UV stabilizer as carbon black. Hence, these pipes cannot be recommended for outdoor installations. Painting of pipes for UV resistance is recommended but cannot be considered as fool proof method for UV stabilization over a long, maintenance free life span.

However, PE as well as Composite pipes does not have any effect of UV radiation if a proper UV stabilizer, such as carbon black is used. With the use of carbon black, PE pipes as well as composite pipes can be safely used for external installations.

5. Thermal Expansion

High coefficient of thermal expansion leads to thermal stresses. These stresses lead to unwanted stresses on supports provided for the piping. Thus, in case of concealed piping, thermal stresses may lead to cracking of the tiles if the pipes with high thermal expansion coefficient are used. In case of hot water, the amount of thermal stresses developed is further higher.

Metal pipes, copper as well as GI have very low coefficient of thermal expansion. CPVC, HDPE, PVC pipes are having high coefficient of thermal expansion.

Composite pipes, because of aluminium layer, have coefficient of thermal expansion approximately equivalent to copper pipes.

Comparative values for thermal expansion for CPVC, HDPE and Composite pipes are as follows:

  • Coefficient of Linear Expansion:
  • Composite pipes: 1.3 x 10°5 meter/meter / oF
  • CPVC: 3.4 x 10-5 meter./meter/ oF
  • HDPE: 12 x 10-5 meter./meter/ oF

Composite pipe has a low coefficient of linear expansion, similar to copper tubing, and is far superior to alternate plastic pipe such as CPVC/HDPE/PP. This eliminates the need of installation “offsets” and the concern about abrading pipe due to constant movement as a result of temperature changes. Straight runs are always attainable with Composite


  • 100 meter of Composite pipe with a 36o F (20oCentigrade) rise in temperature will expand 4.7 cms.
  • 100 meter of CPVC pipe expands 12.3 cms. in the same situation.
  • 100 meter of HDPE pipe expands 43.1 cms. in the same situation.

6. Effect of sub-zero Temperature

Freezing of water at sub-zero temperature leads to failure of rigid pipes. Hence, most of the metal pipes are not recommended to be used at sub-zero temperature. Copper pipes also cannot withstand multiple freezing cycles.

PVC and CPVC pipes are also rigid and not recommended to be used for sub-zero temperature.

PE pipes, being flexible, do not have any effect of multiple freezing cycles.

Composite pipes, when tested for multiple freezing cycles at following parameters, have passed the test for stipulated 5 cycles.

Internal pressure :10 bar.

Temperature : Ranging from -5 to –40 deg. c.

Minimum duration for sub-zero temperature 18 hours.

 7. Ease in installation: 

This property is generally governed by type of joints and time required for jointing, flexibility of the pipe and allowable bending radius, ease in handling (light weight) and availability of pipe lengths.

7.1 Type of joints: 

GI pipes are always used with threaded joints. These joints may lead to failure over the time period because of corrosion. Failure of joint due to faulty jointing can also not be ruled out. Also when these joints get corroded they pose near to impossible situation during maintenance and repairs.

Copper pipes are safer, in case of solder as well as ferule joints. However solder joint cannot be done at the place of installation, particularly in case of concealed piping. Hence, the piping has to be completed outside and then fitted in the wall. In such cases, addition of a fitting or maintenance of piping becomes very difficult.

PVC pipes can be joined by solvent cement, which is quite easy. However the time required for jointing is quite high if the jointing quality is required to be good. Threaded PVC pipes carry the same disadvantages as GI pipes.

CPVC pipes are joined by solvent cement Jointing.

Shelf life of solvent cement is an area where precautions are necessary to avoid the use of ‘expired’ solvent cement as it is having shelf life less than 6 months.

PE pipes, with butt fusion joint carry the same disadvantages as soldered copper pipes.

Composite pipes are generally joined by compression fittings. Ease in achieving closer manufacturing tolerances facilitates the use of compression fittings. These joints are very easy, fast as well as safe against leakages.

7.2 Flexibility of pipe and allowable bending radius:

GI, CPVC and PVC pipes are rigid and hence cannot be bent. Use of elbows is essential. This leads to increase in number of joints and preparation of the ends for elbows in case of threaded joints, which ultimately leads to higher installation time.

Copper pipes can be bent with mechanical benders. PE pipes can be bent to a radius of 25 times the diameter of the pipe. However, due to spring back property bent pipe is required to be rigidly clamped to keep the pipe in position.

Composite pipes can be safely bent by hand when used with protective support springs to a radius of 5 times the diameter of pipe. This facilitates the elimination of elbow joints at most of the places. Composite pipe has a unique property of “Stays in shape”. Once the pipe is bent it will remain in the same form without any spring back.

7.3 Ease in handling and availability of pipe lengths:

GI as well as copper pipes are comparatively heavier and hence handling is more difficult as compared to light weight PVC, CPVC, PE and composite pipes.

GI, CPVC and PVC pipes are available in standard straight lengths. This leads to wastages as well as/or increase in number of joints.

PE and Composite pipes are available in straight as well as coil lengths up to 100 meters and above. This facilitates easier handling as well as lesser number of joints with no wastage, with properly planned piping installation.

8. Flow properties for friction loss 

Pipe’s internal surface finish directly governs the flow properties of the pipe. GI pipe, because of rough surface have very poor flow properties.

Flow properties of copper, PVC, CPVC, PE and Composite pipes are more or less same.

9. Permeability

Air ingress can cause rapid corrosion of metallic components of plumbing system. In case of metal pipes, ingress can be via improperly made joints.

Plastic pipes are permeable to oxygen from air, thus providing a path for oxygen into the system water causing increase in corrosion. Tests on commercially available plastic pipes have shown that the permeability to oxygen is sufficiently high to promote unacceptable corrosion of components in internal plumbing system.

Composite pipe with aluminium barrier layer would appear to be best option as an alternative to other plastic pipes to reduce the corrosion of system components caused because of permeability of pipe.