Can you use PPR for radiator buried pipe? It turned out to be a PB tube.

Polybutene (PB) is an inert polymer, and its density is within the range of other thermoplastics such as PE or PP. PB is polymerized from butene (C4H8), so it is an ecological carbohydrate. It has high temperature resistance, durability, chemical stability and plasticity, and is odorless, nontoxic and odorless. It is one of the most advanced chemical materials in the world at present. PB pipeline system, the most economical pipeline for greenhouse and floor radiant heating, is the most advanced water supply system in the world today. It has been widely used in many countries in the world. The temperature range is-10oC to +90oC, and its excellent performance is being welcomed by more and more people. Polybutene pipe is formed by isotactic polymerization of 1- butene monomer. The performance of the pipe is similar to that of crosslinked polyethylene pipe, but the relative strength is higher, the creep resistance and performance retention rate at high temperature are higher, the thermal conductivity is 0.24 W/m·k, and the thermal insulation performance is good. Under long-term continuous working pressure, the conveying water temperature can reach 95℃. For example, the American Plastic Pipe Fitting Research Institute estimates that the design water pressure of PB pipe is 6.9MPa at room temperature, so PB pipe is widely used in more developed countries in the world. However, due to the shortage of bonded butene resin manufacturers worldwide and tight supply, PB pipes are expensive. Polybutene is an inert polymer. Polybutylene pipe has the characteristics of high temperature resistance, cold resistance, frost resistance, good chemical stability, strong plasticity, tasteless and non-toxic, and various connection methods (thermal bonding joint welding, thermal spiral field welding, mechanical clamping connection). It is an ideal new pipe for small-diameter water supply pipeline, which has been widely used in Europe, America and Asia. There are products in China, but the raw materials are domestic pipes. The specifications are usually φ 16 ~ φ 63, and the pressure grade is 1.0 ~ 3.2 MPa. It is suggested that the hot water pipe system should be made of pipes with pressure grade not less than 2.0MPa, and the connection mode is the same as that of PP-R pipe, which is hot melt connection. Polybutylene pipeline (PB) is a high-quality and high-performance material with good flexibility, creep resistance, high temperature resistance, high pressure resistance, environmental protection, and the most safe and reliable. Polybutylene pipeline (PB) is a high-quality and high-performance material with good flexibility, creep resistance, high temperature resistance, high pressure resistance, environmental protection, and the most safe and reliable.

Use of polybutylene lead pipe

1, water supply (sanitary pipe) and hot water pipe

Among the tap water and hot water pipes, Xingjilong polybutylene pipe is recognized as the most durable, non-toxic and tasteless pipe material in the world.

2. Gardening tubes for agriculture

Because of its strong corrosion resistance, flexibility and anti-ultraviolet ability, it is used for irrigation, watering of golf courses, underground heating of farms and pipelines for spraying drugs.

3. Road heating for snow removal

It has semi-permanent service life and strong impact resistance, and is especially suitable for snow removal pipelines in roads, parking lots and playgrounds.

4. Pipe for automatic fire sprinkler system.

It passed the UL specification of the United States for the first time in nonmetallic pipelines and passed the FM certification. It is widely used as the pipeline of automatic sprinkler system in developed countries.

5. Heating pipes

Because of its good thermal insulation, construction and semi-permanent durability, it is most suitable for building fan coil units and under-floor heating pipeline systems.

6. Industrial pipelines

Because of its strong corrosion resistance (acid resistance, alkali resistance, salt resistance), non-toxic and tasteless, it is the best pipe for chemical industry, food processing engineering, general hospitals, industrial water and so on.

7. Hot spring tube

Outstanding heat resistance and pressure resistance, will not produce rust and scale, as a hot spring pipe has unparalleled effect.

8. Take the hot water pipe of solar greenhouse as an example.

Because Xingjilong PB pipe has excellent thermal insulation performance, it has played a prominent role in the warm water anti-heating system of solar heating houses.

9. Radiator

10, central air conditioning

1 1, direct drinking water project

PE-X

Materials BIDYCODE, a world-famous chemical materials laboratory, only recognized two qualified PE-RT raw material manufacturers: SK Company of South Korea and Dow Company of the United States. The international and domestic chemical materials testing authorities have not certified PE-X raw material manufacturers (the quality of imported raw materials and domestic raw materials is uneven).

Product quality stability: molecular structure stability during PERT production. From the delivery of raw materials to the production process and finished products, the molecular structure of raw materials has not changed. PEX raw material PE and crosslinking agent cross-linked in production, which changed the molecular structure of PE raw material.

The molecular structure of PERT is stable during installation and use. The molecular structure of the product has not changed during installation. During the installation and use of PEX, when the water temperature exceeds 70℃, the inner wall of the pipeline will be cross-linked twice, which will make the molecular structure of the pipeline uneven.

Stability of product quality: the stability and uniformity of molecular structure make product quality have strong stability. The change and inhomogeneity of PEX molecular structure make the product quality unstable.

Inspection and quality control: PERT has perfect incoming inspection of raw materials, in-process inspection during production and ex-factory inspection of products. Each pipe and fitting contains a finished product with complete production information. Before leaving the factory, each tube must undergo a pressure test far higher than the service conditions to ensure foolproof. Shaanxi Xingjilong Pipeline Co., Ltd. adheres to the management principle of "it must be done, it must be recorded and the records must be traceable", and specially formulated the enterprise standard far higher than the national standard of PE-RT pipes. Each enterprise tests according to its own testing method.

Product characteristics PERT: 1. The raw material is a kind of medium density polyethylene with very stable mechanical properties, which is composed of octene and ethylene. 2. Excellent impact resistance and temperature resistance. 3. Excellent low-temperature embrittlement resistance. PEX: 1, the molecular structures of raw materials and finished products are different, and the mechanical properties are unstable; 2. Excellent impact resistance and temperature resistance. 3. Low temperature embrittlement resistance is poor.

Product use: PERT can be repaired, which meets the national requirements that concealed pipes are not allowed to have joints. There is no repairability, once there is a problem, the tubing of the whole system must be replaced.

Installation and construction restrictions PE-RT has excellent low temperature resistance, and can be installed freely even at -20℃ without installation restrictions. PE-X has poor brittleness resistance at low temperature. When the ambient temperature is lower than 5℃, it must be heated before installation, so it cannot be constructed freely and has installation limitations.

Construction difficulty: PE-RT has excellent flexibility, the bending radius is 5 times of the diameter, and the stress in the bending part can be relaxed quickly without rebounding. The construction difficulty is small. PEX bending radius ≥200mm has poor flexibility, and the stress at the bend of the pipeline is relatively concentrated, which is easy to cause the pipeline to crack at the bend due to stress concentration, and the construction is difficult.

Environmental protection. PERT can be recycled, which meets the national environmental protection requirements. PEX cannot be recycled, which pollutes the environment and does not meet the national environmental protection requirements.

PP-R:

The product quality of domestic raw material enterprises is uneven, and everyone claims that Nordic raw materials can't produce the corresponding qualification documents and import declaration procedures.

PP-R adds a lot of antioxidants to prevent polypropylene degradation, and the antioxidants are extracted into the water trapped in the pipeline, which is easy to cause water pollution.

The molecular structure of the product has not changed during installation.

The molecular chain structure of PP-R-(-CH2-CH-)n- contains a lot of unstable tertiary carbon, which is more susceptible to aging by light, oxygen and impurities (such as copper and iron ions) than PE. Therefore, the PPR product manual generally stipulates that the open-air stacking time shall not exceed half a year. Due to the microstructure of PP-R itself, PP-R pipe can not resist rapid cracking, so it is forbidden to be used for gas supply in Europe.

Each enterprise tests according to its own testing method.

1, poor resistance to rapid stress cracking. 2, the linear expansion coefficient is large, and the cold and hot deformation is large. 3, poor low temperature resistance, cold brittleness, not suitable for winter construction. 4. Poor impact resistance

Repairable.

1, welding time and pressure are not easy to master, and the process is random. In hot-melt push-joining, it is easy to pile up and shrink, forming irregular defect areas at welding points, resulting in stress concentration, which affects the long-term performance of PPR pipeline system. 2. The low temperature resistance is poor, and the construction temperature is required to be above 5℃, and the brittleness temperature is -5℃- 10℃, which is not suitable for winter construction. The pipe wall is thick, bending construction is easy to produce stress concentration and fracture, and the creep resistance is poor, so it is not suitable for floor heating pipes.

Can't bend, consume joints, increase costs, increase hidden dangers, and the construction is difficult.

Can be recycled and meets the national environmental protection requirements.

The above information is for reference only.