What about the specification and size of PPR pipe and fitting?

What about the specification and size of PPR pipe and fitting?

The specification of PPR pipes and fittings is a seemingly simple problem, but not everyone can make it clear. Because there are different types of pipes in the water pipe industry, the characteristics of such pipes are different, so the meaning of specification parameters describing them is also different. The specification parameters of PPR water pipe are mainly the pipe diameter specification and wall thickness, so let’s talk about it in detail.

PPR pipe diameter specification

First of all, three concepts should be clarified: nominal outer diameter Φ, nominal diameter DN, and English unit.

The nominal outer diameter of the pipe is the outer diameter of the pipe. It is usually marked with DN in lowercase, that is, the number after Φ marked on the pipe.

The nominal diameter DN is the average outer diameter of the pipe, which is generally a round integer and a reference value, which is different from the actual pipe size.

British units are worth what people often call four, six and one inch.

The wall thickness of the metal pipe is generally thin, so the average diameter of the outer diameter and the inner diameter is almost equal to the outer diameter, i.e. DN = Φ. However, for PPR pipes, due to the thick wall thickness, the difference between the nominal outer diameter DN and the actual outer diameter of the pipe is still large, so it needs to be distinguished.

In PPR water pipe, there are the following relations among the British unit, nominal diameter and actual outer diameter:

In the domestic piping, the common outer diameter specifications of PPR water pipe are 20mm, 25mm and 32mm.

PPR Tube series: S

For the wall thickness property of PPR pipe, there are two parameters, pipe series s is one of them.

By definition, pipe series s is a dimensionless number related to the nominal outer diameter and nominal wall thickness, which is used to guide the selection of pipe specifications. It is a set of round integers after calculation.

In GB / T 18742.2-2017 polypropylene piping system for hot and cold water part 2: pipes, the specific specification parameters of ppr pipe and fitting series s are as follows, as shown in the table below:

When the nominal outer diameter of PPR pipe is fixed, the larger the pipe series s is, the thinner the wall thickness of water pipe is, and the smaller the pipe series s is, the thicker the wall thickness of water pipe is.

Standard size ratio: SDR

Standard size ratio is another parameter related to the wall thickness of PPR pipes. According to the SDR value of standard size ratio, PPR pipes are divided into five series: sdr11, SDR9, sdr7.4, sdr6 and sDR5.

The standard size ratio SDR is the ratio of the nominal outer diameter of PPR pipe to the nominal wall thickness. The relationship between SDR and PPR tube series s is: SDR = 2S + 1.

The same as the pipe series, when the nominal outer diameter of PPR pipe must be, the larger the standard size is than SDR, the thinner the wall thickness of water pipe, and the smaller the standard size is than SDR, the thicker the wall thickness of water pipe.

Specification of PPR pipe fittings

The nominal outer diameter DN of PPR pipe fittings is always consistent with the nominal outer diameter DN of PPR pipes connected with it, and is often marked on the PPR pipe fittings.

The wall thickness of PPR pipe fittings shall not be less than that of PPR pipes of the same PPR pipe series s. Most enterprises only have a series of PPR pipe fittings of the highest standard S2, which are all applicable to hot and cold water.

For pipe fittings with thread, i.e. threaded parts, the specification of thread is commonly used in two types, 1 / 2 and 3 / 4, i.e. the difference between 4 points and 6 points. The corresponding nominal diameter of thread is 15mm and 20mm respectively.

The nominal outer diameter of PPR fitting 45 ° elbow is 25 mm, that is to say, the pipe with the nominal outer diameter of 25 mm is connected.

Shijiazhuang xingyin import and export trade Co., Ltd. is the PPR pipe fittings manufacturer,PPR pipe fittings supplier. We are one of the best factories in China. Our products are of reliable quality and can be used by families and wholesalers. We can provide a variety of color PPR pipe fittings. We can provide national standard goods, non-national standard goods, according to the requirements of the production of PPR pipe fittings.
http://www.pvcpipefitting.com/what-about-the-specification-and-size-of-ppr-pipe-and-fitting/

PPR water pipe installation steps and process

PPR water pipe installation steps and process

The advantages of PPR water pipe, such as non-toxic, corrosion-resistant and heat-resistant, long service life, have become the primary choice of home decoration. The installation of PPR water pipe is a more important part of concealed works, which must not be sloppy. What is the installation of PPR water pipe? What are the specific steps?

Installation method

Concealed PPR pipe

PPR pipes embedded in walls, floors, etc. can prevent expansion. Both the pressure and the tensile stress are absorbed without damaging the various materials. If the pipeline has isolation materials (to meet the standards), these isolation materials can allow more expansion.

External pipe network

When the PPR pipeline is installed outside, the compensation of linear expansion shall be considered. The basic requirements are: first, natural compensation shall be used as much as possible; second, expansion ring compensation shall be used, and then fixed support and free hanger shall be used for compensation. When installing the anchor, pay attention to separate the PPR pipe into various parts, so that the expansion force is directed in the required direction.

Pipe installation in shaft

If an anchor is installed near the two branch pipes of the main pipe, the main riser can expand or contract vertically between the two floors. The distance between two anchor points in the shaft shall not exceed 3M. Other methods can also be used to compensate for expansion. For example, install “expansion branch pipe” from the branch pipe of the main pipe.

Generally, PPR pipes and pipe fittings are connected by hot melting or electric melting. When connecting, the PPR pipes and pipe fittings are heated to critical melting at the same time. Then, the pipes are immediately inserted into the PPR pipe fittings in a straight line. The welded pipes have good contact performance and high success rate.

Welding procedure

1. A self-adjusting hot-melt welding machine is used to weld the PPR pipe and the pipe fittings, and the temperature is 260 ℃. Connect the machine to the power supply (220 V), when the green light flashes, it indicates that the welding temperature has been reached, and start to work; if the ambient temperature is lower than 5 ℃, the heating time will be extended by 50%.

2. Due to the light weight and flexibility of the material, all welding must be carried out on the workbench. Based on this advantage, man hours are saved.

3. Sometimes, some connections should be made in the wall. It should be noted that there is enough operation space at the joint location, which can be operated accurately.

Use special scissors to cut PPR pipe, and the cut shall be smooth without burr.

Clean the welding parts of PPR pipes and pipe fittings to avoid sand, dust and other damage to the joint quality.

The heating head matched with the size of the PPR pipe to be welded is used to assemble the fuser, which is heated to 260 ℃.

Mark the welding depth on the PPR pipe with a marking pen.

At the same time, insert the PPR pipe and pipe fittings into the welding device, and heat them according to the specified time.

After heating, push the pipe and pipe vertically and maintain for more than 5 seconds. Do not use too much force to prevent bending.

However, attention should be paid to the welding, not to shake left and right, and the time should not be too long. The specification of pipes and fittings shall be unified. In addition, the welding equipment should have constant temperature control. If the temperature is too high, the welding can not be fully penetrated. It is easy to leak water. If the temperature is too low, the welding speed is slow and time-consuming.

PPR water pipe can also use the hot-melt socket connection method, the pipe and the pipe fittings are completely integrated, the strength of the joint even exceeds the strength of the pipe body, as long as the construction is proper, after the completion of the pressure test, the reliability is very high.

Construction specification

1. Before the installation and construction of the pipeline, the construction drawings and other technical documents shall be complete, and the technical disclosure of drawings has been carried out to meet the construction requirements; meanwhile, the scheme, technology, materials, machines and tools can ensure the normal construction; finally, the construction personnel shall receive the professional technical training of the pipeline installation.

2. The pipes and pipe fittings provided shall meet the design requirements, and shall be attached with product instructions and quality certificates.

3. Materials with signs of damage shall not be used. If any abnormality is found in the pipeline quality, it shall be rechecked before use.

4. In the process of pipeline installation, the opening shall be blocked in time to avoid pipeline blockage and pollution.

5. During the construction and installation, the cold and hot water pipes shall be rechecked for their grades and use occasions; the pipe surface shall be marked outward in a conspicuous position.

Shijiazhuang xingyin import and export trade Co., Ltd. is the PPR pipe fittings manufacturer,PPR pipe fittings supplier. We are one of the best factories in China. Our products are of reliable quality and can be used by families and wholesalers. We can provide a variety of color PPR pipe fittings. We can provide national standard goods, non-national standard goods, according to the requirements of the production of PPR pipe fittings.

http://www.pvcpipefitting.com/ppr-water-pipe-installation-steps-and-process/

What meaning does S5 and S4 represent on PPR pipe

1. What meaning does S5 and S4 represent on PPR pipe?

PPR pipes are divided into five series of S5, S4, S3.2, S2.5 and S2, and the corresponding pressure classes are different according to the total utilization coefficient C of the pipeline system:

When C=1.25, corresponding nominal pressure 1.25,1.6,2.0,2.5,3.2MPa;

When C=1.5, it corresponds to the nominal pressure of 1.0,1.25,1.6,2.0 and 2.5MPa respectively.

These five series of cold and hot water pipes can be used, but as a result of PPR pipe in the case of higher temperature service life will be greatly reduced, so in the selection of hot water pipe than cold water pipe to choose a higher pressure level.

According to the national standard, the pipe series of pipe fitting is the same as the pipe, but due to the variety of pipe fitting is too many, many manufacturers only produce one or two S series. Please use the S2 sent to you by the manufacturer, the highest grade. And the pipe fitting pressure class higher is better.

Pp-r pipes have four series of pipes, S5, S4, S3.2 and S2.5, etc. Generally there are two series of pipes for hot water pipes, S3.2 and S2.5, and three series of pipes for cold water pipe system, S5, S4 and S3.2. In piping design, the safety factor may be 1.25 or 1.5 according to different requirements.

Generally, s5 and s4 are used for cold water pipe, s3.2 and s2.5 are used for hot water pipe.

PPR tube specification S5 series –1.25 mpa (12.5 kg)

PPR tube specification S4 series –1.6 mpa (16 kg)

PPR tube specification S3.2 series –2.0 mpa (20 kg)

PPR tube S2 series –2.5 mpa (25 kg)

2. Technical answer of PPR tube

What is the technical name of PPR?

PPR pipe officially known as random copolymer polypropylene pipe, is currently the most used in the home installation of a water supply pipeline.

Why do PPR pipes have different colors?

This is due to the difference in the raw material PPR particles. So the pyelsa pipe is white and the white butterfly is gray, which does not represent the quality level of the product.

PPR water pipes are divided into cold water pipes and hot water pipes.

PPR pipe is divided into cold water pipe and hot water pipe, the difference is that the cold water pipe has blue marking line, hot water pipe is red line.

What are the characteristics of PPR water connection technology?

The interface of PPR pipe adopts hot melt technology, and the pipes are fully integrated, so once the installation pressure test passes, water will never leak again, and the reliability is very high.

What are the disadvantages of PPR water pipes?

The main defects of PPR water pipe are: high temperature resistance, pressure resistance is slightly worse, long-term working temperature can not exceed 70℃; Each section is of limited length and cannot be bent. If the distance of pipe laying is long or the corner is too much, a large number of joints will be used in the construction. Pipes are cheap but fittings are relatively expensive. Nevertheless, from comprehensive can go up tell, PPR tube is the tube material with higher cost performance at present, become the first choice material that the home installs conduit to transform so. Relative to other several kinds of pipe: galvanized iron pipe because of numerous shortcomings, the ministry of construction has been banned in 2000; Although aluminum-plastic pipe has good high temperature resistance and convenient construction, when it is used as hot water pipe, its wall will be misaligned due to long-term thermal expansion and cold contraction, resulting in leakage. Copper pipe is durable and environmentally friendly, but not widely used due to high price and high construction requirements.

How are the specifications of PPR water pipes classified?

There are two main indicators:

The pipe diameter of PPR tube can be from 16mm to 160mm, the main thing that is used in domestic outfit is 20mm, 25mm two kinds (commonly known as 4 in charge, 6 in charge respectively), among which 4 in charge use more.

the wall thickness is 2.8mm and 3.4mm.

The dealer will say that the latter bearing capacity is larger than the former, this group does not think so, since the manufacturer produces 2.8 wall thickness, must be through an experiment certification, its can withstand the water pressure must reach the national standard, since 2.8 can do why to produce 3.4, kill chicken with cattle knife; At the same time, the thicker the pipe wall, the smaller the inner diameter of the pipe, the water flow will be smaller.

What other components do PPR pipes have besides water fittings?

There are 4 kinds of common PPR pipe joints, which are generally welded to the water pipe:

A. ppr fitting coupling: used to connect two pipes when the pipe is not long enough.

B. ppr fitting Elbow: divided into right Angle bend and 45 bend, used when the pipe needs to corner.

C. ppr fitting Tee: water pipe connecting three directions.

D. PPR Reducing coupling: connect two water pipes with different diameters, and the above mentioned beam joints, elbow and tee have corresponding size heads, which are rarely used in home decoration.

PPR FITTING MALE COUPLING, PPR FITTING FEMALE COUPLING: connect bibcock, water meter, other kind of type conduit is used, what most USES in domestic outfit is inside silk piece. Inner wire and outer wire connections are more expensive, a wire connection is more expensive than even a meter of water pipe

Ppr fitting over bend: when two pipes meet on the same plane but not in connection.

end cap: also call PLUG, after the pipe is installed to temporarily close the outlet, when the installation of bibcock off.

How does PPR conduit quality judge?

First look at the appearance, the quality of the tube surface smooth, complete logo, accessories also have brand name; Inferior products cannot do this. Because the high-quality pipe USES 100% imported PPR raw materials, the inferior pipe only USES part of PPR raw materials, both in the performance aspect has the very big difference.

Toughness: good quality PPR pipe toughness, can be easily bent into a circle without breaking, and poor quality pipe is more fragile, a bend is broken.

Expansion of heat and contraction of cold: good water pipe in the high water temperature can still retain the hardness, and inferior pipe is in 60 degrees of water temperature was softened.

Service life: quality product warranty 50 years, quality products can only 5-6 years.

Shijiazhuang xingyin import and export trade Co., Ltd. is the PPR pipe fittings manufacturer,PPR pipe fittings supplier. We are one of the best factories in China. Our products are of reliable quality and can be used by families and wholesalers. We can provide a variety of color PPR pipe fittings. We can provide national standard goods, non-national standard goods, according to the requirements of the production of PPR pipe fittings.

http://www.pvcpipefitting.com/product-category/ppr-fitting/

http://www.pvcpipefitting.com/what-meaning-does-s5-and-s4-represent-on-ppr-pipe/

The difference between PPR pipe and PE pipe

The difference between PPR pipe and PE pipe

PPR pipe and PE pipe can be used as drinking water pipes, here is to compare the advantages of the two kinds of pipe. In drinking water, PE generally do cold water pipe; PPR (special hot water material) can be used as hot water pipe. What want to say above all is PPR tube and PE to give conduit can serve as drinkable conduit, basically compare the superiority of two kinds of tube material respectively here. In drinking water, PE generally do cold water pipe; PPR (special hot water material) can be used as hot water pipe; PPR (cold water material) can also be used as cold water pipe; If you want to make hot water pipes, of course, PPR is good; (if be in the drinking water pipe in domestic outfit, that need not distinguish, it is to use PPR to compare PE basically more), with the improvement of current economic condition, ignore cold hot water to use PPR hot water pipe directly on a lot of projects.

If used for cold water transmission, please refer to the following differences:

1. Elastic modulus

The elastic modulus of PPR water pipe is 850MPa, PE water pipe belongs to medium density polyethylene, the elastic modulus is only about 550MPa, good flexibility, stiffness is insufficient, used in the field of building water supply, pipeline flatness is not good, easy to bend, easy to deform, the pipeline is not beautiful.

Thermal conductivity: PPR water pipe for 0.24, PE water pipe for 0.42, nearly doubled, if used in floor heating, this is its strength, heat dissipation good thermal radiation effect is better, but used in hot water pipeline is its weakness, good heat dissipation, heat loss is large, pipe surface temperature is also higher, easy perm.

2. Temperature resistance: the maximum stable temperature of PE water pipe is 70℃ and the minimum temperature is -30℃ under normal use. The maximum stable temperature of PPR water pipeline is 70℃ and the minimum temperature is -10℃ under normal service condition. PE water pipe and PPR water pipe have the same high temperature resistance. But PE pipe is better than PPR pipe in low temperature performance.

3. Welding: although both PPR tube and PE tube can be hot-welded, PPR tube is easier to operate. The flanging of PPR tube is round, while the flanging of PE tube is irregular and easy to be blocked; The welding temperature is also different, the PPR tube is 260℃, the PE tube is 230℃.

4. Low temperature impact strength: speaking from the indicators is the strength of PE water pipe material, PPR water pipe is stronger than PE water pipe, PE water pipe is more flexible than PPR water pipe.

5. Size and specification: the maximum size of PE pipes and fittings can be made is dn1000, and the maximum size of PPR is dn160. Therefore, more PE pipes are used for drainage pipes, and the water supply pipes are generally PPR.

However, we can draw the following conclusions:

1.PE tube has good low temperature resistance and can be used as a pipeline; The thermal conductivity of PPR tube is small, which can be used as cold water pipe or hot water pipe.

2.PE pipe has a larger specification and a wider range of use. PPR pipe has relatively small specification parameters and is suitable for home decoration. Therefore, PE pipe is often used as drainage pipeline, PPR pipe is more suitable for water supply pipeline.

3. There are more types of PE pipes, which can be widely used in large facilities such as municipal engineering, and PPR pipes are used for family use.

4.PPR pipe fitting installation is easier and more convenient, while PE pipe fitting installation and connection have higher technical requirements

Shijiazhuang xingyin import and export trade Co., Ltd. is the PPR pipe fittings manufacturer,PPR pipe fittings supplier. We are one of the best factories in China. Our products are of reliable quality and can be used by families and wholesalers. We can provide a variety of color PPR pipe fittings. We can provide national standard goods, non-national standard goods, according to the requirements of the production of PPR pipe fittings.

http://www.pvcpipefitting.com/the-difference-between-ppr-pipe-and-pe-pipe/

How to connect PE pipe to PPR pipe?

How to connect PE pipe and PPR pipe and melt them directly? What’s more, the specifications and models of the two pipes are the same?

The PPR pipe and PE pipe should not be connected by hot melt. The PPR Female Adapter should be directly connected with the PPR Male Adapter.

 

The wall thickness of PE tube is different from that of PP-R tube. The bonding strength of the two materials cannot meet the requirements. PE is connected with pp-r after being introduced into the room, and the small pipe diameter is converted to metal and the large pipe diameter is converted to flange. Cast iron pipe and steel pipe in the outdoor flange conversion, flange shaft with soft repair easy to replace.

The PPR tube can be connected by hot melt, but not by hot melt. If you want to connect them together, you can add a pipe joint in the middle to connect the two pipes.

The correct method of connection is to use flange for connection, and small diameter pipe can also be connected with toothed accessories, so as to effectively guarantee the connection strength and ensure the engineering quality.

Flange connection is to fix two tubes, fittings or equipment, respectively on a flange, and then add a flange pad between the two flanges, and finally bolt the two flanges tension so that it closely together a removable joint.

Flange connection is mainly used for the connection of cast iron pipe, rubber liner, non-ferrous metal pipe and flange valve, etc.

PE pipe and PPR pipe connection is reliable: the PE pipe system is connected by electric hot melt, the strength of the joint is higher than the strength of the pipe body. PE tube has better impact resistance than PPR tube: the low temperature embrittlement temperature of polyethylene is very low, which can be used safely in the temperature range of -60-60℃. During winter construction, due to the good impact resistance of the material, the pipe will not crack. The stress cracking resistance of PE tube is better than that of PPR tube: HDPE has low notch sensitivity, high shear strength and excellent scratch resistance, and excellent environmental stress cracking resistance. PE pipe is more resistant to chemical corrosion than PPR pipe: HDPE pipe is resistant to a variety of chemical medium corrosion, the presence of chemicals in the soil will not cause any degradation of the pipe. Polyethylene is an electrical insulator, so it will not decay, rust or electrochemical corrosion; Nor does it promote growth of algae, bacteria or fungi.

Shijiazhuang xingyin import and export trade Co., Ltd. is the PPR pipe fittings manufacturer,PPR pipe fittings supplier. We are one of the best factories in China. Our products are of reliable quality and can be used by families and wholesalers. We can provide a variety of color PPR pipe fittings. We can provide national standard goods, non-national standard goods, according to the requirements of the production of PPR pipe fittings.

How to distinguish PVC drain pipe quality？

How to distinguish PVC drain pipe quality？

Distinguish PVC drainage pipe quality is good or bad a total of three points:

1. choose and buy PVC drain pipe, the color is even, the inside and outside wall is smooth have toughness to feel had better, the PVC drain pipe color that almost is either snow-white, or some yellow, texture is harder, color is uneven, some outside wall is smooth, the inner wall is coarse, have needle or small hole.

2.PVC drainage pipe toughness is a key indicator in the purchase. How to determine, when we saw it into narrow strips, try to fold 180, a fold broken, indicating that the toughness is very poor, brittleness indicates that the quality of PVC pipe; It is difficult to break, indicating toughness, and the more effort required to break the tube, high strength, toughness is good quality PVC pipe.

3. According to the judgment of the broken stubble of PVC drainage pipe, the stubble is delicate, indicating that the better the homogenization, strength and toughness of the pipe, the better the quality of the pipe; If the port is rough and has a sandy texture, the quality of the pipe is average. Average quality; Break very hard, show to have tenacity, and the tube material that needs to break more when fold, strength is tall, toughness is big drain conduit of good quality.

Application:

1. Tap water piping engineering (including indoor and outdoor municipal water pipe of water supply), because UPVC plastic pipe with acid and alkali resistance, corrosion resistance, rust, scale, water quality protection, prevent water quality of secondary pollution, the advantages of the strongly advocated in the production of environmentally friendly products today, as a kind of ideal “green building materials” to protect human health, has been widely applied by China and the world.

2. Water-saving irrigation piping project. Compared with ordinary irrigation, the UPVC drip irrigation system can save 50%-70% water, save the use of fertilizers and pesticides, and increase the crop yield by 30%-80%. Nowadays, China is short of water resources and backward in agricultural irrigation methods, which has great social benefits for promoting the development of water-saving agricultural production in China.

3. Construction piping works.

4.UPVC plastic pipe has excellent insulating ability and is widely used as cable conduit for posts and telecommunications.

5.UPVC plastic pipe is resistant to acid, alkali and corrosion. Many chemical plants are used for infusion piping. Other also used in sinking engineering, medicine piping engineering, mineral brine transport piping engineering, electrical piping engineering.

http://www.pvcpipefitting.com/how-to-distinguish-pvc-drain-pipe-quality%EF%BC%9F/

What inspection shall be carried out for the welding of IPS(PPH) pipe and fitting

What inspection shall be carried out for the welding of IPS(PPH) pipe and fitting

IPS(PPH) pipe and fittings hot melt socket welding construction inspection mainly for the appearance inspection, including the following:

1. Whether the socket and socket are aligned;

2. Whether the extruded molten material between socket and socket is consistent on the whole outer circumference;

3. Peel off the contact surface and observe whether there are impurities, shrinkage holes, cracks or other injuries in the welding area;

4. Observe whether there are tube wall collapse, excessive flanging or improper shape caused by excessive welding temperature and welding pressure.

IPS(PPH) tube hot melt saddle welding construction inspection

The construction inspection of hot melt saddle welding is mainly for appearance inspection, including the following contents:

1. After welding the hot-melt saddle-shaped IPS(PPH) fittings with the IPS(PPH) pipe, the flanges shall be smooth and symmetrical along the entire outer circumference, with uniform, full and round dimensions. Flanges shall not have incisions or notched defects, shall not have obvious spongy scum, no obvious pores;

2. The hot-melt saddle-shaped IPS(PPH) pipe fitting shall be perpendicular to the axial direction of the IPS(PPH) pipe;

3. There shall be scratch marks around the welding of saddle IPS(PPH) pipe fittings.

Construction inspection of IPS(PPH) pipes and fittings welding

The construction inspection of electric welding is mainly for appearance inspection. Including the following:

1. Electric melting IPS(PPH) pipe fittings shall be intact without deformation or discolor;

2. Solute with protruding observation holes should not be in the shape of flowing and should not change color; There shall be no molten material on the welding surface;

3. The socket of welding IPS(PPH) pipe fittings shall be coaxial to the welded pipe;

4. After welding of IPS(PPH) pipe fittings. Check IPS(PPH) tube circumference for scratch marks. There shall be marked marks for insertion and marked marks for scraping off the oxide skin.

Shijiazhuang xingyin import and export trade Co., Ltd. is the ips（pph)  pipe fitting manufacturer, ips（pph) pipe fittings supplier. We are one of the best factories in China. Our products are of reliable quality and can be used by families and wholesalers. We can provide a variety of color ips（pph) pipe fittings. We can provide national standard goods, non-national standard goods, according to the requirements of the production of ips（pph) pipe fittings.

http://www.pvcpipefitting.com/what-inspection-shall-be-carried-out-for-the-welding-of-pph-pipe-and-fitting/

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3 step hot welding of IPS(PPH) pipes and fittings

3 step hot welding of IPS(PPH) pipes and fittings

1. Welding machines and tools

IPS(PPH) pipe and fittings welding for hot welding, using various specifications of hydraulic or manual plastic pipe hot welding machine. Taking the hot-melt welding machine of hydraulic plastic pipe as an example, welding is mainly divided into three parts: welding control platform, welding operation platform and tool placement rack.

2. Prepare for welding

For the pipe cutter (pipe cutter), acetone and clean cloth matching the IPS(PPH) pipe model, the surrounding environment should be kept clean and dust-free, and the ambient temperature should not be lower than 0℃.

3. Hot melt welding

Welding is divided into seven steps: blanking, preheating, mating, heating, welding, cooling and inspection.

A,

Use special cutter to cut IPS(PPH) pipes to required size. When cutting the pipe, be careful not to run the line and slowly screw into the blade. Do not push too fast, which may damage the blade. When the cutter is difficult to rotate, should reverse rotation cutter, remove the blade, run again.

B, preheating

Use IPS(PPH) pipe and fitting hydraulic regulators to adjust the preheating pressure to the welding required pressure. Adjusting method: lock the pressure relief valve, push the hydraulic lever forward, and watch the pressure gauge to show the pressure. When the pressure does not reach the required pressure, loosen the heating pressure relief valve, make the pressure gauge display drop to zero, re-adjust the hydraulic control valve, and then lock the heating pressure relief valve until the pressure gauge reaches the required pressure.

The temperature setting panel on the control platform is used to set the temperature of hot-melt welding and control the temperature of the heating plate to match the melting of the welding surface. Red shows the set temperature, green shows the current temperature, and when the red light on the panel jumps to green, the hot melt welding is ready. The hot melt temperature of PPH is generally set between 195℃ and 205℃.

C,

Select the appropriate mold, with a wrench welding IPS(PPH) pipe and pipe fittings fixed on the operating platform;

Note: during fixing, screw the fastening screws at both ends of the fixture one by one to avoid uneven IPS(PPH) pipe segment; When the two pipe sections in the hydraulic operating lever back to a larger distance shall not be less than the thickness of the electric cutting machine; The welding surface of each IPS(PPH) pipe segment should highlight the fixture when the 40-50mm pipe segment is longer, pay attention to the overall level.

(2) the hydraulic operating lever to promote the larger, the two pipe segment. Visually check the wrong joint of the welding surface, and for the lower half, touch by hand so that both joints are level. If it fails to meet the requirements, the welding seam shall be level by adjusting both ends of the fastening screw so that there is no wrong opening.

(3) visually inspect the joint of the two welding surfaces to reach the joint without obvious gap; If yes, use an electric cutting machine to grind the hole. Put the cutting machine on the operating frame, start the cutting machine, and then another person controls the hydraulic propulsive rod, the pipe section to set the pressure against the cutting machine; Visually cut the weld surface until it is flush. Step back the hydraulic fixture, take out the cutting machine and put it back on the tool rack;

Note: back after the hydraulic fixture, do not hurry to stop the cutting machine, let the cutting machine turn a few times before taking out. Can make the welding surface more smooth, to prevent the occurrence of cross section.

Clean the welding surface, with a clean cloth dipped in a small amount of acetone to clean the welding surface.

D, heating

Remove the heating plate that has reached the required temperature from the IPS(PPH) pipe and fitting tool holder. Put it on the operation rack and push the hydraulic fixture against the side of the welding surface to make the pressure reach the required welding pressure. When the hot melt flanging of the welding surface reaches 1mm, release the heating pressure relief valve and remove the heating pressure. After waiting for a period of time, the requirements of hot melt butt of the welding surface are met.

Note: the heating plate must be placed vertically.

Shijiazhuang xingyin import and export trade Co., Ltd. is the ips（pph)  pipe fitting manufacturer, ips（pph) pipe fittings supplier. We are one of the best factories in China. Our products are of reliable quality and can be used by families and wholesalers. We can provide a variety of color pvc pipe fittings. We can provide national standard goods, non-national standard goods, according to the requirements of the production of pvc pipe fittings.

http://www.pvcpipefitting.com/3-step-hot-welding-of-ipspph-pipes-and-fittings/

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