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JE201908 PPR pipe production line

price Negotiable

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PPR is the abbreviation of tripropylene polypropylene, also known as random copolymer polypropylene pipe. It adopts heat welding method, has special welding and cutting tools, and has high plasticity. The price is also very economical. With the added insulation layer, the insulation performance is better, and the pipe wall is very smooth, excluding the joints of the inner and outer wires. It is generally used for embedded walls or deep well embedded pipes. PPR pipe is moderate in price, stable in performance, heat-resistant and heat-resistant, corrosion-resistant, smooth and non-scaled on the inner wall, safe and reliable piping system, non-penetrating, and can be used for up to 50 years. However, the construction technology is high, and special tools and professionals are required to carry out the construction to ensure the safety of the system.

specification:

PPR pipe specifications are expressed by pipe series S, nominal outer diameter dn × nominal wall thickness en

Example: PPR pipe series S5, PPR nominal outer diameter dn25mm, PPR nominal wall thickness en2.5mm

Expressed as S5, dn25 × en2.5mm

PPR pipe series S: It is a dimensionless numerical series used to indicate the specifications of ppr pipes. It has the following relationship S = (dn-en) / 2 en

Where: dn——PPR nominal diameter (inner diameter), unit is mm

en——PPR nominal wall thickness, unit is mm

Generally used PP-R pipe specifications are 5, 4, 3.2, 2.5, 2 five series

PPR pipe specifications PPR pipes are divided into five series of 11, 9, 7.4, 6, 5 according to the standard size ratio SDR value.

PPR pipe specifications PPR standard size ratio SDR: is the ratio of the nominal outer diameter dn of the PPR pipe to the nominal wall thickness en.

The relationship between the SPR and the PPR tube series is as follows: SDR = 2S + 1

Representation of PPR pipe fitting specifications:

The nominal outside diameter dn of the PPR pipe fitting refers to the nominal outside diameter of the PPR pipe connected to the PPR pipe fitting. The wall thickness of the PPR pipe fittings shall not be less than the wall thickness of the PPR pipe of the same PPR pipe series S.

Most companies' PPR fittings only have a standard S2 series, and both hot and cold water are applicable.

PPR tube specification S5 series -------------- 1.25 MPa (12.5 kg)

PPR tube specification S4 series -------------- 1.6 MPa (16 kg)

PPR pipe specification S3.2 series ------------ 2.0 MPa (20 kg)

PPR pipe specification S2.5 series -------------- 2.5 MPa (25 kg)

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Industrial production process:

Traditionally, polypropylene has been produced by the three most representative methods in the manufacturing process. Hydrocarbon slurry or suspension is a liquid inert hydrocarbon diluent used in the reactor in order to transfer propylene to the catalyst, remove heat from the system, deactivate / remove the catalyst, and dissolve the atactic polymer. The range in which grades can be produced is very limited. (This technique is no longer used).

Bulk (or bulk pulp): Use liquid propylene instead of liquid inert hydrocarbon diluent. The polymer is insoluble in diluents and rides on liquid propylene. The formed polymer was withdrawn and any unreacted monomer was flashed off.

Gas phase: Use gaseous propylene in contact with a solid catalyst, resulting in a fluidized bed medium.

Application areas:

1. The building's cold and hot water systems, including central heating systems;

2. Heating systems in buildings, including floor, siding and radiant heating systems;

3. Drinkable pure water supply system;

4. Central (centralized) air-conditioning system;

5. Pipeline systems for transporting or discharging chemical media.

Precautions:

1. PPR pipes and fittings are connected by hot-melt, but can not be directly threaded on the pipes and fittings. Flange connection can be used when connecting to metal pipes. When connecting with water appliances, pipe fittings with metal inserts must be used ;

2. Be sure to use reliable quality hot-melt equipment in the process of hot-melt connection, which can ensure the welding quality;

3.When using special scissors to cut the PPR pipe vertically, make sure that the cut remains flat and free of burrs;

4.The welding parts of PPR pipes and fittings must be clean to prevent sand and dust from damaging the quality of the joint;

焊接 时,设备必须进行按照指定的时间加热的管材和管件; 5.Insert the pipes and fittings that are heated according to the specified time during the welding ;

[1] 6. Wait until the heating is completed to take out the pipes and fittings for connection. If these two positions are found to be wrong, then you can adjust accordingly at a certain time; [1]

7. After the connection of the agent PPR pipe, you must hold the pipe and fittings firmly with both hands to maintain sufficient cooling time. After cooling to a certain extent, you can let go and install the pipe. The white PPR pipe should be colored on the wall or floor after the connection is completed. The paint marks the exact location of the pipeline to avoid damaging the fittings again.


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