PPR Pipe Home Heating Construction Scheme: High Temperature Adaptation and Pipe Fixing

with the improvement of pipe durability and safety requirements for home heating systems, PPR pipes have become a popular choice for home heating pipes due to their strong heat resistance and high cost performance. However, the heating system has been operating at high temperatures (usually 60-80 ° C) for a long time, and the high temperature adaptation ability of PPR pipes and the stability of pipe fixing directly affect the life of the system. This article will explain the PPR pipe home heating construction plan in detail from the two core dimensions of high temperature adaptation technology and pipe fixing method.

1. PPR pipe high temperature adaptation: the whole process from pipe to connection

High temperature adaptation is the basis for the safe operation of PPR pipes in heating systems.

1. High-temperature PPR pipe selection

Heating system needs to choose PPR pipe with temperature resistance grade 95 ° C (such as S5 grade, S4 grade), the thickness of the pipe wall needs to be matched according to the heating pressure (generally 0.3-0 MPa), it is recommended that the main pipe choose DN25 and above specifications, branch pipe with DN20 to ensure water flow and heat dissipation efficiency. When purchasing, check the pipe logo and confirm the words "for hot and cold water" or "special for heating" to avoid misuse of normal temperature PPR pipe resulting in later deformation and leakage.

2. Hot melt connection: control temperature and interface quality

The connection quality of PPR pipe directly affects the high temperature sealing. The temperature of the hot melt machine needs to be set at 26010 ° C. The heating time is adjusted according to the pipe specifications (dn20 pipe is heated for 5 seconds, dn25 pipe is heated for 7 seconds). After insertion, maintain a stable pressure for 3-5 seconds to ensure that the interface is free of bubbles and skew. After connection, it needs to be cooled naturally. Forced cooling or immediate force is prohibited to avoid embrittlement of the interface. Special attention: the same interface can be hot melted up to 2 times. Multiple hot melts will cause the pipe to shrink and affect the water flow.

3. System stress testing

After the pipe connection is completed, a pressure test is required: turn off the heating equipment, fill the pipe with water to drain the air, slowly raise the pressure to 0.8-1 MPa (1.5 times the working pressure), hold the pressure for 30 minutes, and the pressure drop of 0.05MPa is qualified to ensure that there is no risk of leakage during high temperature operation.

Second, PPR pipe fixation: the stability skills of surface-mounted and concealed pipes

Improper fixing of pipes can easily lead to pipeline displacement, abnormal noise or even rupture under high temperature. It is necessary to choose a scientific fixing plan according to the surface-mounted/concealed scene.

1. Pipe card selection and spacing setting

Pipe card is the core component of fixed pipes. The heating system needs to choose high-temperature and load-bearing metal pipe cards (such as galvanized steel cards or copper cards) to avoid high-temperature deformation of plastic cards. Fixed spacing should strictly follow the specifications: horizontal pipe dn20 pipe card spacing is 0.6 meters, dn25 pipe spacing is 0.8 meters; vertical pipe spacing is 1.0 meters, and 1 pipe card should be set within 30cm before and after the turn to prevent the pipe from sagging due to gravity. It is recommended to use pipe clips with insulation layer for concealed pipelines to reduce heat loss while avoiding friction between pipelines and walls.

2. Special position fixing treatment

- Turn: use "L-shaped" or "T-shaped" pipe clips, with diagonal braces fixed to enhance torque resistance;

- Wall/floor: need to install casing (1-2 larger than the pipeline), both ends of the casing are filled with sealant to prevent rigid contact between the pipeline and the wall;

- Pipe in the ceiling: use the hanger to fix, the hanger spacing is 20% shorter than the surface installation, and add anti-fall tokens under the pipeline to deal with ceiling vibration.

3. Expansion compensation: to deal with high temperature displacement

PPR pipe will produce linear expansion (about 0.1mm/℃ per meter) at a temperature difference of 60-80 ° C. Expansion joints or natural compensation bends (such as "Ω-type" bends) need to be installed in long-distance straight pipe sections. The compensation amount is calculated according to the length of the pipeline (12mm compensation space needs to be reserved for 10-meter straight pipes) to avoid cracking the pipeline due to expansion stress.

3. Acceptance after construction: details determine the life of the system

Key inspections are required during acceptance: ① Whether the pipe card is firm and the wrench is not loose; ② Whether there are water stains or discoloration at the interface (high temperature leakage will cause the pipe to change color); ③ Whether the pipeline is horizontal and vertical without obvious bending; ④ Whether the expansion compensation measures are in place. It is necessary to observe 2-3 heating cycles in the early stage of operation. If there is abnormal noise or local overheating, it is necessary to adjust the fixed position or add the pipe card in time.

PPR pipe home heating construction, high temperature adaptation is "lining", and pipe fixing is "face". Both are indispensable. Through scientific selection, standardized connection, and precise fixing, PPR pipes can be ensured to operate safely in long-term high temperature environments, providing durable protection for home heating systems. During construction, it is recommended to operate by a certified plumber to avoid affecting the life of the system due to omissions in details. SEO keywords: PPR pipe home heating construction, PPR pipe high temperature adaptation, PPR pipe fixing method, home heating PPR pipe installation, PPR pipe hot melt connection skills

1, PPR pipe high temperature adaptation: from the pipe to the connection of the whole process control

high temperature adaptation is the basis for the safe operation of PPR pipe in the heating system, from the pipe selection, hot melt connection to stress testing layer by layer check.

1. High temperature PPR pipe selection

heating system needs to choose temperature grade 95 ℃ PPR pipe (such as S5, S4), the thickness of the pipe wall according to the heating pressure (generally 0.3-0 MPa) match, it is recommended that the main pipe with DN25 and above specifications, branch pipe with DN20, to ensure water flow and heat dissipation efficiency. When purchasing, you need to check the pipe logo and confirm the words "for hot and cold water" or "special for heating" to avoid misuse of normal temperature PPR pipe resulting in later deformation and leakage.

2. Hot melt connection: control the temperature and interface quality

The connection quality of the PPR pipe directly affects the high temperature sealing. The temperature of the hot melt machine needs to be set at 26010 ° C. The heating time is adjusted according to the pipe specifications (dn20 pipe is heated for 5 seconds, dn25 pipe is heated for 7 seconds). After insertion, maintain a stable pressure for 3-5 seconds to ensure that the interface is free of bubbles and skew. After connection, it needs to be cooled naturally. Forced cooling or immediate force is prohibited to avoid the embrittlement of the interface. Special attention: the same interface can be hot melted up to 2 times. Multiple hot melts will cause the pipe to shrink and affect the water flow.

3. System stress testing

After the pipeline connection is completed, the pressure test needs to be carried out: turn off the heating equipment, fill the pipeline with water to drain the air, slowly raise the pressure to 0.8-1 MPa (1.5 times the working pressure), hold the pressure for 30 minutes, the pressure drop of 0.05MPa is qualified, to ensure that there is no risk of leakage during high temperature operation.

Second, PPR pipe fixing: Stability skills of surface installation and concealed installation

Improper pipe fixing can easily lead to pipeline displacement, abnormal noise or even rupture under high temperature, and scientific fixing scheme should be selected according to the surface installation/concealed installation scene.

1. Pipe card selection and spacing setting

Pipe card is the core component of fixed pipeline, heating system needs to choose high temperature resistant and load-bearing metal pipe card (such as galvanized steel card or copper card) to avoid high temperature deformation of plastic card. Fixed spacing should strictly follow the specifications: horizontal pipeline DN20 pipe card spacing 0.6 meters, DN25 pipe 0.8 meters; vertical pipe spacing 1.0 meters, before and after the turn 30cm each need to set a pipe card to prevent the pipeline due to gravity sagging. It is recommended to use pipe cards with insulation layer for concealed pipelines to reduce heat loss and avoid friction between pipelines and walls.

2. Special position fixing treatment

- Turn: use "L-type" or "T-type" pipe card, with diagonal brace fixing, enhance the anti-torque ability;

- through the wall/through the floor: need to install casing (1-2 larger than the pipe), both ends of the casing are filled with sealant to prevent rigid contact between the pipe and the wall;

- Pipe in the ceiling: use the hanger to fix, the hanger spacing is 20% shorter than the surface, and the anti-fall card is added under the pipe to deal with the ceiling vibration.

3. Expansion compensation: to deal with high temperature displacement

PPR pipe will produce linear expansion (about 0.1mm/℃ per meter) at a temperature difference of 60-80 ° C. Expansion joints or natural compensation bends (such as "Ω-type" bends) need to be installed in long-distance straight pipe sections. The compensation amount is calculated according to the length of the pipeline (12mm compensation space needs to be reserved for 10-meter straight pipes) to avoid cracking the pipeline due to expansion stress.

3. Acceptance after construction: details determine the life of the system

Key inspections are required during acceptance: ① Whether the pipe card is firm and the wrench is not loose; ② Whether there are water stains or discoloration at the interface (high temperature leakage will cause the pipe to change color); ③ Whether the pipeline is horizontal and vertical without obvious bending; ④ Whether the expansion compensation measures are in place. In the early stage of operation, it is necessary to observe 2-3 heating cycles. If there is abnormal noise or local overheating, it is necessary to adjust the fixed position or increase the pipe card in time.

PPR pipe home heating construction, high temperature adaptation is "lining", and pipe fixation is "face". Both are indispensable. Through scientific selection, standardized connection and precise fixing, PPR pipes can be ensured to operate safely in long-term high temperature environments, providing durable protection for home heating systems. It is recommended to operate by a certified plumber during construction to avoid the life of the system due to omissions in details.