Hidden Engineering - PPR Pipe Installation and Construction Instructions

Hidden project water supply - PPR pipe installation and construction specification (note to users)

Customer attention before construction:

A: Confirmation of Water Pipes and Positioning of Water Equipment

The customer should determine the direction of the water pipe according to the decoration design drawing and the room type structure. The direction of the water pipe can be divided into ceiling arrangement, wall slot arrangement, ground arrangement and open pipe installation. Which arrangement method is selected to negotiate with the decoration team.

Positioning with water equipment: For example: Pre-filter, booster pump or wall-mounted faucet in the piping system, before installing the water pipe, and determine the placement position, otherwise the construction will be affected.

II: Whether the wall slot is well opened and the old pipe was removed

All the places that need to install water-discharging equipment, such as: water heaters, basins, toilets, bathtubs, etc., the height and depth of the wall groove are up to the standard (the width of the wall groove, single groove is 4cm, double groove is 10cm, and the wall groove depth is 3-4cm ), The height of the wall groove is based on the different equipment used.

Three: through the wall hole

For example, if the diameter of the wall hole for a single pipe is 6 cm, take a wall hole with two pipes and a diameter of 10 cm or hit two wall grooves with a diameter of 6 cm.

Hot melt tool

Hot melt cross section (bad) Hot melt cross section (good)

Construction Guide:

One: Check before installation

1: Whether the tow plate, wires, plugs and sockets are in good condition, whether the thermal container is loose or damaged, and whether the special reduction tube is in good condition.

2: The pipe and fittings are the same brand.

Two: The regular manufacturers of hot-melt machines generally have red and green lights, red light on behalf of heating, green light represents constant temperature, the first green light can not be used, must be the second time to use green light, hot melt temperature At 260°C-280°C. Below or above this temperature, the joints will not be fully fused, leaving potential for seepage.

figure 1

figure 2

Three: The two ends of each pipe should be inspected for damage before construction to prevent damage to the pipe during transportation. If there is damage or uncertainty, the port should be subtracted 4-5cm when the pipe is installed. It is not available. A hammer or heavy object knocks on the water pipe to prevent the pipe from bursting, which increases the service life. (see picture 1)

Four: Cutting the pipe must make the end face perpendicular to the pipe axis. Pipe cutting should use a special pipe cutter. (See Figure 2)

Five: When heating: the end of the tube is introduced into the heating die cap without rotation, and is inserted into the marked depth. At the same time, the pipe is pushed onto the heating die without rotating to reach the specified mark. The heating time should be performed in the table specification in the following figure.

Six: After the heating time is reached, the pipe fittings are removed from the heating mold at the same time. The wire is inserted into the hot melted wire immediately without rotation, so that a uniform flange is formed at the joint, and it is necessary to control the rebound after insertion. .

Seven: In the processing time stipulated in the above table, the just-welded joint can also be corrected, and it can be rotated in small amounts, but after the processing time is over, forced correction is strictly prohibited. Note: The connected pipes and fittings must not be tilted. The basic level should be vertical and horizontal. Avoid the wrong angle when installing the mixer and it cannot be installed normally.

Eight: In the cooling time specified in the above table, it is forbidden to let the newly-processed joint withstand external force.

image 3

Installation Precautions:

1: When using PP-R fittings with metal threads, the white raw tape must be tightly sealed to avoid water leakage from the threads. (See Figure 3)

2: When over-tightening a PP-R pipe fitting with a metal thread, the pipe may be cracked to cause water leakage.

3: Precautions for installing wall tops, wall slots, and ground pipelines are as follows:

Install wall top pipe

1: The distance between the cold water pipe clamps is 50±5cm, and the hot water pipe clamp spacing is 35±5cm. If the pipe clamps are not in place, it will cause the water pipes to shake and cause noise.

2: The direction of the water pipe should be horizontal and vertical (under the premise that the groove is horizontal and vertical) to avoid pulling or twisting the water pipe, causing the water outlet and the wall not to be parallel, affecting the appearance and installation of the mixing faucet.

3: If two pipes run parallel, the distance between the two pipes should be 10±15cm. Otherwise, the pipes are too close to generate condensate under the condition of no ventilation. Cause wall mold.

Install wall channels

1: The construction party (decoration company) should slot according to the standard, otherwise it will ring the correct positioning of the water outlet, leading to difficult installation of the faucet or valve.

2: Water pipe spacing 3-5cm.

Install the ground pipe

1: The pipe is horizontal and vertical, and the outlet is perpendicular to the wall.

2: After the installation of the pipeline, pay attention to the protection of the finished product. The water pipes running on the ground should be filled with cement and yellow sand, and should avoid direct foot pressure or heavy pressure.

3: Pipes and fittings directly exposed to direct sunlight or ultraviolet radiation without any protection will break the molecular structure of polypropylene and shorten its service life. Therefore, a UV-resistant foam hose must be put on the outside of the pipe (contribution) Insulation kit).

Pipeline inspection and acceptance:

1: In the pressure test, a pressure gauge with a measurement accuracy of 0.1 Pa must be used, and the pressure gauge should be installed as far as possible at the lowest point of the entire piping system.

2: After the pipeline is filled with water, the air in the pipeline is eliminated, and then the water meter main valve is closed, and the test can be started.

3: The test pressure is the maximum possible working pressure 1.5 paternity (8-10 kg water pressure usually speaking), if the pipe and the PVC connection must be connected to the PVC connector for about 5 hours before the pressure test and the maximum pressure should not exceed 6 kg . General PP-R pipe pressure measurement and maintenance time is 30 minutes, such as the entire system in the plug without leakage, etc., the pressure indicator fell to 0.5 kg is a normal range. The reason is: the pipeline is caused by the expansion of internal pressure, but for the sake of installation, the entire pipeline system must be checked again.

Note: It is forbidden to use electric pump boost. For example, leakage occurs in the welding system during the piping system and during use, which can be caused by the following reasons:

1: The temperature of the fuser is high or low.

2: The mold is seriously worn, aged, and the welding surface is not smooth.

3: In the welding process, the weld point has a water mark and an oil mark, which will cause the contact surface not to be welded.

4: The technicians have not been properly trained and operated improperly.

5: The decoration team has human factors damage during the construction process, such as heavy objects hitting water pipes or nails and breaking water pipes.

6: Pipes and fittings are not the same brand, raw materials are different and cannot be welded.

If the pipe bursts or bulges due to leakage:

1: Non-professionals change the water pipes privately.

2: The pipe wall thickness is not uniform (counterfeit or defective product), causing the pipe burst.

3: The temperature of the water heater or boiler is out of control or tempering, resulting in steam, temperature, or high, resulting in water pipe burst accidents.

4: The pipe was dropped due to human factors. It was not found during installation.

Tips: Because the installation of non-formal construction personnel can not guarantee the matching reliability of welding tools and joints, and some bad loading horizontal companies and small foremen use fake goods to deceive users, seek for profits, harm the interests of users, and the poor quality of the pipeline in the short term Unrecognized. For the health of you and your family and the safety of your room decoration, please use the PPR pipes and fittings made by regular manufacturers and order from the regular channels, and choose the regular factory installation.

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