How to pick and install PPR hose

The use of PPR hot melt pipes has become the preferred choice for home decoration. It should be noted that the current PPR water pipe is already mature technology, and the quality performance of similar manufacturers should not be much different (there are GB production standards). What should you pay attention to when purchasing PPR water pipes?

example 1:
1, according to the current tap water pressure to select the degree of pressure, generally 1.6MPA, 2.0MPA, the pipe wall has 2.3,2.8,3.5,4.4MM and other thick, not the higher the pressure the greater the thickness is like, in fact, enough That's it. Because we currently know that tap water pressure is the factory pressure, it really goes to your home, this pressure will be greatly reduced.

PP-R Pipe Installation and Acceptance 1. General Requirements 1 Before installing the pipeline, it should meet the following conditions:
Construction drawings and other technical documents are complete, and technical drawings have been submitted to meet the construction requirements;
The construction plan, construction technology, and supply of materials and tools can ensure constant construction.
The construction personnel should be trained in the installation of PP-R pipelines for building water supply.
2 The pipes and fittings provided shall meet the design requirements and be accompanied by product specifications and quality certificates.
3 Do not use materials that show signs of damage. If there is any abnormality in the quality of the pipeline, technical qualification or re-inspection should be performed before use.
4 The openings in the piping system installation should be closed in time.
5 Check the cold and hot water pipe pressure rating and use occasions during construction and installation. The pipe markings should face outwards in a prominent position.
2. Pipe laying 1 When the pipeline is concealed in the wall, it should be matched with the retaining groove of the civil construction. When the size design is not specified, the depth of the wall depth of the embedded wall is De+20mm and the width is De+40~60mm. The surface of the groove must be flat and there must be no protrusions such as sharp corners. After the pipe passes the pressure test, the wall groove is filled with M7.5 cement mortar.
2 The pipeline shall be buried in the floor surface and shall be carried out according to the position of the design drawings. If the site construction changes, there should be a pictorial record.
3 When the pipeline is installed, there must be no axial distortion. When the wall is crossed or when the building is reversed, forced correction is not suitable. When the water supply PP-R pipe is laid parallel to other metal pipes, it should have a certain protection distance. The net distance should not be less than 100mm, and the PP-R pipe should be inside the metal pipe.
4 The interior surface mounted pipeline should be carried out after the completion of the civil construction powder. Before installation, the correct pre-hole or pre-embedded casing should be matched with the civil construction.
5 Pipes shall be provided with steel casing when they pass through the floor. The casing is 50mm above the ground and has waterproof measures. When pipes cross the roof, strict waterproof measures should be taken. Through the front end should be set fixed bracket.
6 When hot water pipes pass through the walls, the steel casing shall be installed in conjunction with the civil construction. When the cold water pipes pass through the wall, holes may be reserved, and the size of the openings is 50 mm larger than the pipe outer diameter.
7 Pipes buried directly in the floor surface and in the wall should be checked and checked before the sealing.
8 Requirements for the laying of buried pipes and buried pipes in buildings are as follows:
I. Pipeline laying below ±0.00 in indoor floor should be divided into two sections. The construction of the outer wall of the foundation wall shall be performed within ±0.00 of the floor first; after the completion of the civil construction, the outdoor connection pipe shall be laid;
II. The laying of pipes above the indoor floor shall be re-excavated after the backfill of the civil works is compacted. It is forbidden to lay the soil before or in the unconsolidated soil.
III. The bottom of the laying pipe should be flat and there must be no protruding sharp objects. The particle diameter of the soil should not be greater than 12mm, if necessary, a 100mm thick sand cushion can be laid;
IV. When buried pipes are backfilled, the backfill shall not be in contact with the pipe wall. Should be first filled with sand or soil with a particle diameter of not more than 12mm to 300mm above the top of the pipe. After compaction, the original soil can be backfilled. The buried depth of underground pipelines should not be less than 300mm.
V. Pipes shall be provided at the floor of the pipeline and the height shall be 100mm higher than the floor;
VI. Pipes should be provided with metal sleeves when they pass through the foundation wall. The clearance height above the reserved hole in the casing and foundation wall shall not be less than 100mm if no design is specified;
VII. When the pipeline is passing through the neighborhood road and the thickness of the soil covering is less than 700mm, strict protection measures shall be adopted.
3. Pipe connection 1 Between the PP-R pipe and pipe fittings of the same kind of material, hot melt connection should be used, and special hot-melt tools should be used for installation. The pipes in the dark wall and floor surface shall not be threaded or flanged.
2 PP-R pipes for water supply and metal fittings shall be connected using PP-R pipe fittings with metal inserts as the transition. The pipe fittings and PP-R pipe are connected with hot melt and connected with metal pipe fittings or sanitary fitting hardware fittings.
3PP-R pipes and other material pipes can also be flanged.
4 hot melt connection should be carried out according to the following steps:
I. After the hot-melt tool is turned on, the operating temperature indicator lights up to start operation;
II. Cutting the pipe must use the end face perpendicular to the pipe axis. Pipe cutting is generally used pipe cutter or pipe cutting machine, if necessary, can use sharp hacksaw, but after cutting the pipe section should remove flash and burr;
III. The connecting surface of pipe and pipe must be clean, dry and free of oil stains;

Note: If the ambient temperature is less than 5 °C, the heating time should be extended by 50%: "Adjustment" refers to the pipe, pipe fittings after heating, socket, you can immediately correct the connection angle slightly, so that the pipe joints are horizontal and vertical.
V, welding elbow or tees, according to the requirements of the design drawings, should pay attention to the direction, in the axial direction of pipe fittings and pipe, with the auxiliary signs marked its position;
VI. When connected, the end of the tube is introduced into the heating jacket without rotation and inserted into the marked depth. At the same time, the tube is pushed onto the heating head without rotation to reach the specified mark. The heating time should meet the requirements of Table 12 (it can also be specified by the manufacturer of hot melt tools);
VII. Immediately after the heating time is reached, the pipe and fittings are removed from the heating jacket and the heating head at the same time. The real wire is inserted into the marked depth without rotation and the uniform flange is formed at the joint. Avoid excessively inserting the pipe into the pipe fittings to prevent the molten material from clogging the inner hole and affecting the flow of water. During the fusion and cooling process, the pipes and fittings shall not be moved or rotated, and no external force may be applied to the connection.
4. Supports and hangers 1 Pipes must be installed with different pipe diameters and requirements to install pipe clamps or hangers. The position should be accurate, the installation should be firm, and the embedment should be smooth. The pipe clamps should be in close contact with the pipes, but the pipe surface must not be damaged.
2 When using metal pipe clamps or hangers, plastic strips or rubber or other soft material spacers should be used between the metal pipe clamps and the pipes. In the connection between the metal pipe fittings and the water supply PP-R pipe, the pipe clamp should be located at one end of the metal pipe fitting.
3 The spacing between the riser and the horizontal pipe hanger shall not be greater than that specified in Table 13.

1000-1500mm can be used.
When the 4 pipe hangers are used for anti-expansion measures, they shall be constructed at fixed points. The pipeline shall be provided with reliable fixed measures at each water distribution point, force point, and branch pipe branch node.
5. Pipeline Pressure Test Install a pressure gauge at the lowest point of the piping system.
1 Cold water pipe test pressure shall be 1.5 times the working pressure of the pipeline system, but not less than 1.0 MPa.
2 The test pressure of the hot water pipe should be 2.0 times the working pressure of the pipe system, but not less than 1.5 MPa.
3 pipeline hydrostatic test should meet the following requirements:
I hot melt connection pipe, hydraulic pressure test time should be carried out after the connection is completed 24 hours;
Before the hydrostatic test, the pipeline shall be fixed and the joints shall be exposed;
III Inject water slowly into the pipeline. After filling with water, discharge the air in the pipeline first to check the water tightness.
IV pressure should be used manually pump, boost time of not less than 10 minutes, the pressure accuracy of the measuring instrument should not be less than 0.01MPa to the specified test pressure, pressure 1 hour, the test pressure drop shall not exceed 0.06MPa;
V is 1.5 times the working pressure, the voltage is regulated for 2 hours, and the pressure drop must not exceed 0.03 MPa. At the same time, check the connections and do not leak.
(4) Pipes buried directly in the floor surface and walls shall be tested before they are poured or plugged. After the pressure test is completed, the civil works can continue construction.
6. Pipe Cleaning and Disinfection 1 The water supply piping system shall be flushed before acceptance. Rinse water flow rate should be greater than 2m/s, no dead angle should be left, each water distribution point faucet should be opened, the lowest point of the system should be set to the water outlet, the cleaning time is controlled at the flushing outlet, the drainage water quality is equivalent to the influent water.
2 After the drinking water system has been washed, it is also filled with water containing 20 to 30 mg/l of free chlorine. Chlorine-containing water should stay in the pipe for more than 24 hours.
3 After pipelines are sterilized, rinse them with drinking water and sampled and inspected by the health supervision and administration department. After the water quality complies with the current national standard “Sanitary Standard for Drinking Water”, they can be delivered for use.
7. Safe construction 1 Pipeline connection When using hot-melt tools, comply with the safety regulations for electrical tools and pay attention to moisture and dirt contamination.
2 There shall be no open fire on the site of operation. It is forbidden to open the PP-R pipe for open-boiled fire, and it may be heated and heated to bend the pipe.
3 The water supply PP-R pipe shall not be used as pulls or hangers.
4 After the buried pipe is sealed, the position and direction of the pipe should be marked on the wall or on the ground. It is strictly forbidden to strike or nail the metal nail or other sharp objects on the pipe.
8. Pipeline Acceptance 1. Upon completion acceptance, a certificate of conformity or test report shall be issued for the pipe or fittings.
2 concealed pipe installation should be concealed inspection. Check whether the groove is flat and has no sharp corners. The pressure level can meet the design requirements. For pipelines in ceilings and tube wells, check whether measures to overcome the expansion are set.
3 When the installation and acceptance of open pipes is inspected, it shall be checked whether the spacing and type of support and hanger meet the design and construction requirements.
4 completion acceptance

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