Get to Know About PPR Pipe

Oct. 25, 2021


PPR pipe as a common pipeline water supply system is widely used in various construction industries, including residential domestic piping systems, hotels and shopping mall plumbing projects, etc...

So how much do you know the PPR pipe you are using? How do you select the best PPR pipe or fitting for your project? Through this article, let get to know about PPR pipe!

RIFENG PP-R Plumbing Systems

What's PPR pipe?

PPR pipes are a new type of environmentally friendly pipes, which also represent the development direction of drainage pipes in the future.

So what is PPR means? PPR is a random co-polymer polypropylene, which is formed by random co-polymerization of propensity monomer and a small amount of ethylene monomer under the action of heat, pressure and catalyst.

The ethylene monomer is randomly distributed in the long chain of propensity, and the ethylene monomer is generally controlled between 3-5%. The ethylene content and the polymerization method of ethylene and propensity determine its cold brittleness.

Therefore, in winter, the flexibility of the PPR pipe will decrease, while rigidity will increase and flatten. If the pipe is impacted by an external force, the surface of the pipe will crack more seriously.

Types of PPR pipe

RIFENG as a global piping supplier and manufacturer, devoted to improving product quality and practicality. To meet the needs of global piping solutions, RIFENG has also developed the following new products, such as Basalt Fiber PPR Pipe, Anti-freeze PPR Pipe, etc... which can be used in each piping application.

Do you know these types of PPR pipes?  Keep reading!


#Glass Fiber Composite PPR Pipe

RIFENG/RIIFO Glass Fiber Composite PPR Pipe consists of PPR inner and outer layers and a special mixture of Glass Fiber (GF) and PPR in the middle layer. It increases the rigidity of the pipe, improves the strength of the pipe, and reduces the linear expansion coefficient of the pipe.

Advantage of Glass Fiber Composite PPR pipe:
     - Low linear expansion coefficient (0,05mm/mK), long-term high-temperature operation without fear of deformation.
     - Three-layer structure design, stable and reliable, strongly isolate light to ensure clean water.
     - Excellent resistance to oxidation & corrosion, extraordinary chemical stability.
     - Upgraded temperature and pressure resistance, the strength of the pipe exceeds the standard value by 80%, and the instantaneous working temperature up to 95℃.

#Antibacterial Ceramic PPR pipe

RIFENG's Antibacterial Ceramic PPR pipe, combined with ceramics to efficiently improve the smoothness of the inner wall. Compared with ordinary PPR pipes, the smoothness of the inner wall is improved by 100%.  Work with high-efficiency nano-antibacterial technology, which can ensure that the antibacterial rate in the wall is as high as 99.99%, to better offer a healthy water solution.

Advantage of Antibacterial Ceramic PPR pipe:

     - Smooth inner walls reduce the accumulation of scale.
     - Effective nano-technology effectively improves antibacterial performance, with an antibacterial rate as high as 99.99%.
     - Effectively block the optical fiber, avoid moss growth in the tube, and ensure clean water quality.  

#Double layer PPR pipe

RIFENG double-layer PPR piping system, made from the latest scientific formula with high-quality polypropylene random copolymer, it’s non-toxic, ensuring people safe drinking water, which  can be applied in both residential and commercial buildings. RIFENG keeps the outer layer white and the inner is green, which effectively helps prevent the permeation of oxygen and light, providing people with clean water.


Advantage of double-layer PPR pipe:
     - With double layer helical flow-channel structure, and BM shielding helix and IKV forced feed system, PP-R could be crystallized in a more homogeneous and regular way.
     - It contributes to enhancing the creep and pressure resistance of the pipes.
     - Highly stable quality is insured and the outstanding durability will secure our PP-R pipe work well for 50 years.  

#Basalt Fiber PPR Pipe

Basalt Fiber is a new type of inorganic, environmentally friendly and high-performance fiber material. It is one of the most representative materials in the field of aerospace science and technology. With excellent rigidity, super pressure-bearing capacity and environmental protection, it is an ideal solution for hot water.

Advantage of Basalt Fiber PPR pipe:

     - Using aerospace industrial-grade basalt fiber, environmental protection and low energy consumption, which can be 100% recyclable;
     - Super pressure resistance, the pressure resistance strength is increased by 25% compared with ordinary PPR;
     - Low linear expansion coefficient (0,05mm/mK), long-term high-temperature operation without fear of deformation.
     - Composite pipe, focusing on the advantages of three layers of materials, excellent performance, stable and reliability.
     - Properties of basalt fiber significantly exceed glass fiber, in which tensile strength is higher by up to 20%.

#Anti-freeze PPR Pipe

The PPR anti-freeze pipe adopts the integrated moulding technology of inner PERT and outer PPR to provide a strong defence against low temperature and cold brittleness, prevent the pipe from freezing and cracking, completely bid farewell to low-temperature anti-freezing trivial measures, easily deal with sub-zero temperatures, and extend the service life of pipes.
Advantage of Anti-freeze PPR pipe:

     - Ultra-low temperature resistance, frost resistance test at -15℃, can easily cope with the ultimate pressure of 3.0MPa, and the frost resistance capacity is increased by 95%.
     - Roughness of the inner surface is as low as 0.1um, smooth and non-scaling, healthy and hygienic, with low resistance and smoother water flow.
     - High impact resistance, can withstand the impact of a drop hammer of 1kg at a height of 1m under the condition of -5℃, the pipe remains intact, and the impact resistance is increased by 1.5 times.  

How is PPR pipe in an application?
In most construction project cases, PPR pipes have a big range of applications, the most common areas can be used for:
       # Distribution for cool and hot water
       # Pipes to connect kinds of low temperature heating system
       # Chilled water piping for air conditioners
       # Pipes for heating and cooling settings in solar energy system

In case application, PPR pipe will be used in:
       # Residential apartments, condominiums, public housing
       # Commercial shopping centres, office buildings
       # Industrial plants dealing with chemicals, food processing
       # Hospitals
       # Schools, laboratories and chemical sewerage
       # Hotels and resorts

Is ppr pipe suitable for hot water?

In some cases, PPR pipe would be also used for hot water supply, and some people may also confuse about is ppr pipe suitable for hot water?  And the answer is: Yes!

Let’s tell you why!

PPR pipe has better heat resistance. The Vicat softening point of the PPR pipies is 131.5°C. The maximum working temperature can reach 95℃, which can meet the requirements of the hot water system in the building water supply and drainage code.

With long-lasting performance, RIFENG’s PPR pipes bear different working pressures according to different working temperatures:
S5-12.9Bars, S4-16.2Bars
S3.2-20.2Bars, S2.5-25.9Bars


What is the difference between pex and ppr pipes?

When we talk about water supply systems,  except PPR pipes, what kinds of material come first on your mind? Some peole may pex and PPR pipes? Here we go ~

PEX pipes are very different from PP-R pipes. Most importantly, PEX pipes are engineered and used for very different applications.

PPR is a polypropylene random copolymer pipe. They are suitable for cold and hot water pressurized plumbing and mechanical systems.
PEX is a form of polyethylene with cross-links. It is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping.

PEX pipes are manufactured in smaller dimensions for use in plumbing, residential fire safety, and radiant heating and cooling systems. PEX piping is flexible, which allows it to flex around corners and weave through tight spaces. It’s a highly useful material for certain projects. However, PEX pipes are not designed to handle the larger diameters and high pressure that PP-R piping systems are engineered for.

PP-R piping systems are large, rigid and durable, ideal for large-scale plumbing, HVAC, and mechanical applications that PEX pipes are simply not designed to handle.
*Part of information refernce from


As a high-quality complete PPR piping system, PPR connection fitting accessories also play an important role. To increase the utilisation rate of PPR pipes, various conversion fittings were designed to meet the PPR piping needs. How much do you know about these accessories? Let’s take a look!

Types of PPR pipes connection fittings


 - Reducing 50% of the water resistance
 - Reliable structure with a strengthening rib
 - Easier assembly with the directional mark



 - Reducing 50% of the water resistance,with twice the arc,the water flow impact pressure wave is scattered and disappeared by the curved surface. Meanwhile it avoids striking the fitting directly and causing damages.



 - New U-profile tap elbow perfectly fits into hygience oriented and water flow rate optimized installations using different loop installation methods.
 - Improved profile design allowing better flow rate
 - Simpler and more flexible installation


 - Full diameter,water flow increases by 200%
 - Three NBR seal rings to prevent leakage
 - High-quality brass of the valve spool,which makes it more durable

Nowadays, ppr pipe fittings are becoming more and more popular in society, involving water supply, sewage, irrigation, gas transmission and other uses. Due to its own advantages and characteristics, it can stand out in the pipeline market and occupy a very important position.

After we talk about the types of PPR fitting, the next question you may want to ask is: how to choose the suitable PPR fitting? No worries, let’s keep reading!

The selected ppr pipe fittings and pipes should first have the quality inspection report of the quality inspection department, and the ppr pipe fittings used for drinking water should also have the sanitary performance inspection report of the sanitary inspection department.

How to choose the suitable PPR pipe fitting?

 #The appearance of ppr pipe fittings

The colour of ppr pipe fittings and pipes should be basically the same. The inner and outer surfaces of ppr pipe fittings and pipes should be smooth and flat without dents, bubbles and other surface defects that affect performance. PPR pipe fittings and pipes should not contain visible impurities; the surface of ppr pipe fittings should be smooth, flat, and not Defects such as cracks, bubbles, peeling and obvious impurities, severe shrinkage, uneven color, decomposition and discolouration are allowed.

 #The opacity of ppr pipe fittings

Ppr pipe fittings and pipes should be opaque.

 #Pipe diameter and wall thickness of ppr pipe fittings

According to GB/T18742.2-2002 national standard, ppr pipe fittings are divided into five series according to size: S5, S4, S3.2, S2.5, and S2. There is a corresponding relationship between ppr pipe fittings and pipe series S and nominal pressure. The specifications of ppr pipe fittings are represented by pipe series S and nominal outer diameter dn* nominal wall thickness en. Ppr pipe fittings mainly inspect the nominal outer diameter, average outer diameter and The corresponding wall thickness of the pipe series, the socket size of the pipe fitting and the corresponding nominal outer diameter.

 #Physical and mechanical properties and chemical properties of ppr pipe fittings

Whether the hydrostatic test of ppr pipe fittings, the mass flow rate of melt, the thermal stability test under hydrostatic state, the longitudinal shrinkage rate of the pipe, and the impact test of simple beams meet the national standards, the inspection of materials for ppr pipe fittings can be checked. The content of the report and the retest report.

 #Whether the sanitary performance of ppr pipe fittings meets the national standards

Ppr pipe fittings and pipes This item can be used to check the sanitary performance inspection reports of ppr pipe fittings and pipes by the health inspection department.

#Applicability of ppr pipe fittings and pipe systems

After the ppr pipe is connected to the pipe, it should pass the combined test of 8760 hours of internal pressure and 5000 thermal cycles.


We’re your best partner of PPR fitting manufacturer

Reliable manufacturer supplier is the main factors to make sure the quality of your project!  Believing that innovation is the key to go beyond the ordinary, RIFENG has founded two world-class labs recognized and certified by CNAS & Intertek Satellite. Over 600 innovation talents have spared no effort to challenge industrial boundaries, achieving 923 patents and 20 technology awards.  

And this innovative passion has perfectly presented on high quality products and keep continu develop product innovation. RIFENG PPR fitting, upgraded design to improve installation efficiency by 50%!


How to install ppr pipe? 

It’s completely to install ppr pipe? With RIFENG piping tools, can efficienly save your time on installation! Follow the below 5 steps:
Step 1: Cut the pipe vertically

Step 2: Remove the burr, clean the rough selvedge. Use a pencil and RIFENG marker to mark the according melting depth on the surface of pipe ends.

Step 3: Push and insert the pipe and fitting simultaneously into the melding heads on the device. Push the fitting as far as possible; Push the pipe to the marked position.
*If pushing over the marked position or heating over specified time, the pipe may be constricted or clogged. Specified time in right table.

Step 4: When the heating time is passed, pull out the pipe and fitting from the adaptors quickly, then link the pipe and fitting together coaxially.

Step 5: Then hold the pipe and fitting following the connecting time until the welding is completed.



In this article, we systematically talk about the various types and common scenarios of PPR pipe, which can better help you choose and use the pipe more suitable and help to improve the efficiency of project engineering.

In addition, the fittings of pipes are also very important. Different pipe fittings can be used with different scenarios to maximize the use efficiency of pipes. In the article, we also shared quick 5-step installation guidelines to help you effectively increase the utilization rate of PPR pipes and reduce time costs!

Are you still looking for a reliable pipe supplier? RIFENG can help you!

Established in 1996, Rifeng Enterprise Group Co., Ltd. has been committed to developing high-quality and environmental-friendly piping products that cover the plumbing, indoor climate, drainage, and gas fields etc. Rifeng first introduced the most advanced piping technologies and facilities from Europe in the 1990s, since then it has been pioneering China's plastic piping industry and has changed the customers' mindset of taking galvanized pipes for plumbing. Rifeng is passionate to provide customers with more hygienic and secure piping products all the time.


ppr pipe