Comprehensive analysis of the types and advantages and disadvantages of water supply pipes

Update:25-09-2018
Summary:

The laying of water pipes in household projects is the […]

The laying of water pipes in household projects is the top priority of concealed works. If the water pipes leak, it means knocking the walls and damaging the tiles, and all the decorative effects are lost! Nowadays, there are many kinds of water pipes on the market, and many consumers are very upset. Let's analyze how to buy durable water pipes.

First, understand the material and difference of the water pipe:

The safety and durability required for the purchase of water pipes means that the water pipes are stable and reliable over the service life, and there are no incidents such as water leakage or bursting that endanger family property. To ensure long-term use, this requires the water pipe to be resistant to corrosion, high temperature, frost resistance, good mechanical properties, and no deformation and cracking. At present, there are many kinds of water pipes on the market, such as PPR water pipes, aluminum-plastic PPR composite pipes, aluminum-plastic composite pipes, PE-RT pipes, all-round pipes, stainless steel pipes, etc. Below we look at the characteristics of various water pipes:

Aluminum-plastic composite pipe

Product features: Aluminum-plastic composite pipe is generally divided into cold water pipe (white), hot water pipe (red) and gas pipe (yellow) according to different pressure and pressure. The production process is based on the intermediate layer thin-walled aluminum tube, and the inner and outer layers are made of high- and medium-density high-quality polyethylene (PE), which are bonded by hot-melt glue and co-extruded in one step. Therefore, the aluminum-plastic composite pipe has chemical conditions that never scale, never rust, and is not easy to age. The long-term temperature resistance of aluminum-plastic composite pipe can reach -10 °C ~ 90 °C, and the pressure resistance is also relatively strong. Moreover, it has excellent environmental performance and is hygienic, non-toxic and corrosion-resistant. The construction is quick and time-saving, and the professional trained installation personnel use the special crimping tool to crimp, and can be equipped with special stainless steel splitter to match water. The water points required for each room are connected one to one through each branch aluminum-plastic pipe. Any joints that form an indoor water supply line that does not interfere with each other.

Inadequate product:

(1) The pipe should be divided into cold water pipes and hot water pipes according to the temperature and pressure.

(2) Inconvenient operation, non-professional trained installation personnel are prone to water leakage accidents.

(3) The inner diameter of the pipe of each branch is small, and hot water cannot be used during the dry season.

(4) The metal pipe fittings and the plastic pipe are crimped together during construction. Due to the long-term thermal expansion and contraction, the expansion coefficients of the two materials are different, which will cause the water-blocking silicone rubber ring to age rapidly. After losing the elasticity, the water can not be blocked. The connecting portion of the pipe fitting is deformed and displaced to cause leakage.

(5) If special stainless steel splitter is used, it will lead to more water leakage points. [Every wire mesh interface with raw material tape and water blocking is a potential leaking point. A fully equipped stainless steel splitter has at least More than ten leaks! ], maintenance in the future is very troublesome.

(6) Using the water distribution system of the stainless steel splitter, the pipe must be laid in a large amount, and the price of the pipe of the same specification is 1.5 times that of the PPR pipe. The price of the pipe fitting of the same specification is 2 to 10 times that of the PPR pipe fitting, and the cost is very high.

(7) At the time of installation, the pressure test will not leak water, but after a long time, the hot water joint will first leak due to thermal expansion and contraction, which has become a headache for consumers who have used aluminum-plastic composite pipes.

Summary: After a long time of use by countless consumers, it has been proved that the aluminum-plastic composite pipe is only suitable for the surface installation, which is convenient for maintenance or replacement after the joint is in trouble. If buried in the wall, the hot water will basically go out after 3 or 4 years. However, aluminum-plastic composite pipe has excellent corrosion resistance, and is very suitable for gas pipelines with stable pressure and no temperature difference, central air conditioning pipelines and compressed air pipelines.

PPR tube

Product Features: PPR tube appearance is white, gray and green. The inner and outer walls of the high-grade PPR pipe are clean and smooth, free from bubbles, dents, impurities and mottling. PPR pipe has excellent environmental performance, is non-toxic and corrosion-resistant, and belongs to green building materials. The construction is simple and convenient, and any professional plumber has hot melt tools and rich installation experience to complete the operation. The interface is connected by hot-melt technology, and the molecules and molecules between the pipe and the pipe of the same material are completely integrated into the whole in a few seconds, which solves the problem of water leakage in the pipe connection where the water supply industry has been plagued for a long time, so once the installation is completed, the test water is passed. There will never be a leak. Moreover, PPR pipes have chemical conditions that never scale, never rust, and never leak. More importantly, such outstanding performance of the water pipe is very suitable for ordinary home decoration.

(2) The frost resistance is poor, it is not resistant to high temperature and high pressure, and the long-term working temperature is between 0 °C and 70 °C.

(3) It will be light-transmissive and oxygen-permeable, and it will be easy to produce bacteria for a long time.

(4) Poor UV resistance, long time and easy to age.

(5) The expansion coefficient is large and the creep property is strong. The long-term use will deform the tube due to thermal expansion and contraction.

Summary: The PPR tube solves the problem that the water supply industry leaks water at the pipeline connection for a long time, and the construction is convenient and cost-effective. Although there are some shortcomings, it still has unique advantages. It has been proved by practice that more than 95% of the water pipe joint leakage is caused by the non-standard operation of the PPR pipe produced by the fake material or the construction personnel!

Aluminum-plastic PPR composite pipe

The aluminum-plastic PPR composite pipe is an improved upgrade product of ordinary pure plastic PPR pipe. Including steel-plastic PPR composite pipe, copper-plastic PPR composite pipe, etc., are all second-generation PPR pipes.

Features: Aluminum-plastic PPR composite pipe combines the advantages of aluminum-plastic composite pipe and pure plastic PPR pipe. It is installed without cold water pipe and hot water pipe. The production process uses a welded aluminum tube as the intermediate layer, the inner layer is high temperature resistant polyethylene (PE), and the outer layer is imported three type polypropylene (PPR), which is bonded by hot melt adhesive once, and is co-extruded by high pressure. Production techniques and processes are much better than pure plastic PPR tubes. The aluminum-plastic PPR composite pipe has excellent mechanical properties, is bendable and impact resistant. It has strong anti-UV resistance and does not transmit light and osmotic bacteria. Long-term working temperature is good at -10 ° C ~ 95 ° C, with good steady-state properties, not easy to deform, no scaling and other excellent chemical properties. The interface adopts hot-melt connection (part of the aluminum-plastic PPR steady-state composite pipe requires the connection of the hinge, which is slightly troublesome), and the pipe fittings of the same material are melted at one time, and there is no leakage. Moreover, the overall cost of the aluminum-plastic PPR composite pipe is comparable to that of the high-grade pure plastic PPR, which is relatively cost-effective.

Insufficient product: The aluminum-plastic PPR composite pipe is relatively thin under the premise that the inner diameter of the pipe meets the standard. Therefore, the hot melt connection time is difficult to master, and the leakage of the joint is likely to occur.

Summary: Many aluminum-plastic PPR composite pipes leak water because the professional plumber is not proficient in the hot melt time. Consumers must pay attention to the professional operation of professional plumbers when they choose.

PE-RT tube

Product features: PE-RT pipe installation does not distinguish between hot and cold water pipes, has low thermal conductivity, high temperature resistance, smooth internal surface, no scaling, good flexibility, stable chemical structure, good corrosion resistance to common acid and alkali materials, etc. advantage. The long-term working temperature is -20 ° C ~ 110 ° C with good steady state, chemical properties that are not easily deformed. The interface adopts special tools for hot-melt connection (some PE-RT tubes are internally and externally double-melted), and the same material pipe fittings are fused together without leakage. However, PE-RT pipes are too expensive, and most manufacturers use PE-RT pipes on floor heating systems.

Insufficient product: The high cost of PE-RT tube is twice that of pure plastic PPR tube, and the price is higher. When connecting, it must be constructed with a special hot melt machine. If it is a double hot melt connection, the unskilled construction will also increase the possibility of water leakage from the joint.

Summary: High cost and the need for special equipment construction is the reason why PE-RT tubes can not be civilianized, and it also causes widespread promotion difficulties.

All-round tube

Product features: The full name is FR-PPR glass fiber reinforced composite pipe. The all-round tube adopts international leading special production technology such as multi-layer coextrusion, low temperature and high speed, which completely solves the delamination problem of metal composite pipes such as aluminum plastic, copper plastic and steel plastic; and combines the advantages of all water pipes, just like in cement. Like steel bars, the seismic compression strength of pipes is one level higher than other products. The hot and cold water pipes are not included in the installation. High temperature resistance up to 120 ° C, antifreeze performance can reach -40 ° C. It is hygienic, non-toxic, corrosion-resistant and non-fouling, and has no odor after the hot water is released. Low expansion coefficient, no deformation, anti-UV and aging, can be used for open-air installation. Under the same level of pressure, the wall of the all-round tube is thin, increasing the inner diameter of the tube, thereby increasing the water flow by 20%. The pressure standard is also higher than the national standard design pressure, so the service life is increased to 70-80 years. The construction is simple and convenient, and any professional plumber can complete the operation with ordinary hot melt tools. The pipes and fittings of the same material are completely integrated into each other in a few seconds. Once the installation is completed and the test water is passed, there will be no water leakage and no maintenance for life. Due to its many advantages, the all-round tube can be widely used in the replacement of existing piping systems and various fields.

Insufficient products: In the plastic water supply pipe industry, the performance of the all-round tube represents the current international advanced level. If it is not possible to further improve the material at present, the all-round tube is still a new product that cannot be replaced.

Summary: The all-round tube has advanced technology, stable quality, wide application fields, simple construction, no special tools, no maintenance, and reasonable overall cost. These are all advantages that can be widely applied and promoted.

stainless steel pipe

Product features: Thin-walled stainless steel water pipe has the advantages of light weight, no deformation, corrosion resistance, no scaling, etc. It is the superior product in the water pipe. It is an environmentally friendly material that meets health requirements and can be recycled 100%. Stainless steel water pipes can work safely for a long time at temperatures from -270 ° C to 400 ° C. Other properties far exceed the plastic water pipes. The interface is available in both compression and welding. The pressure of the card is the same as that of the aluminum-plastic pipe. There is a problem of aging and water leakage for a long time. Therefore, most of the users who install the stainless steel water pipe use the welding type. The welding is the interface where the oxygen is welded together, so that it can be the same as the PPR water pipe. And during the life of the building, there is no need to update and maintain the fittings. Stainless steel pipes will not oxidize and rust, and the normal service life can be as long as 100 years.

Insufficient products: complex construction conditions and high technical requirements.

Summary: Stainless steel water pipes are standard aristocratic products, and the cost is 3 to 5 times that of pure plastic PPR pipes.

Second, choose a good pipe is to choose Anxin Wan

Usually, when the water pipe is renovated, the total price of joints and fittings will account for two-thirds of the total cost, and the total price of the water pipe itself will only account for one-third of the total cost. If the special stainless steel splitter water distribution system of aluminum-plastic pipe is used, the amount of pipe material is greatly increased. As the pipe material increases, the number of joint pipe fittings also increases, and the aluminum-plastic pipe is entirely made of copper joints. Thus, the same house, the cost It is 2 to 4 times that of the PPR tube. This is something that many consumers can't imagine.

Is the water pipe good? Is the aluminum-plastic pipe good or the PP-R pipe good? How to choose a reliable and durable water pipe? I believe that consumers will make wise and appropriate choices!