Many customers have a question after buying PVC water supply pipes. PVC pipes are made of plastic.Can they perforate?
1. Wire heating method
This type of method is only for DN or PVC pipes with a smaller outer diameter. The specific method is relatively simple. Confirm the punching position, mark it with a water-based pen or another pen, and then heat the wire until it turns red, and then start drilling Hole, operation engineering be careful not to burn yourself, the hole punched out is relatively inaccurate, but it saves costs.
2. Electric drill drilling method
The front-end steps of this type of punching method are similar to the wire heating method. After marking the punching position of the PVC water supply pipe, use the drill bit of the electric drill to turn the mark to start drilling. If the PVC water supply pipe is relatively large in diameter, use a small drill first. Drill a small hole and then use a large drill to drill the hole. The hole produced by this method is more beautiful and accurate, and the cost is average.
3. Laser drilling method
This is an expensive drilling method, both in accuracy and aesthetics are top-notch, mainly used for large metal pipes and large PVC pipes.
The shrinkage marks on the surface of the PVC pipe will directly affect the appearance of the PVC profile, and even affect the cleanness of the corners, so it will leave regrets for the high-quality PVC pipes. So why does the PVC water pipe have sink marks?
Causes of sink marks on PVC pipes
1. Shrinkage marks and vacuum degree.
The same set of molds are prone to shrinkage marks when the vacuum degree is low or the mold vacuum holes are blocked. After careful inspection, when the vacuum degree is low or the vacuum hole of the dry setting mold is blocked, the outer surface of the PVC profile cannot be closely attached to the setting film surface, so the cooling effect is reduced, and the cooling in the dry setting mold is not complete. This will cause signs of cooling shrinkage.
2. Shrinkage marks and mold runners.
Inner ribs alone are not easy to produce shrinkage marks, and T-shaped flow channels are easy to produce shrinkage marks. The degree of production is related to the width ratio of the two T-shaped junction flow channels. The ratio is the width of the T-shaped cross-flow channel to the width of the vertical flow channel. The larger the ratio, the less likely it is to produce shrinkage marks.
3. Shrinkage marks and thickness of inner ribs.
In actual production, it was found that the inner rib was too thick compared to the outer wall, which easily caused shrinkage marks. If the inner rib exceeded the outer wall thickness, the shrinkage marks were more obvious. On the contrary, the thinner the inner rib, the less likely it is to produce shrinkage marks. To be precise, when the thickness of the inner rib is less than 2/3 of the thickness of the outer wall, there is generally no shrinkage mark.
According to relevant analysis, it is believed that this phenomenon is caused by cooling and shrinking. After the customized cooling of the PVC pipe, the intersection of the inner rib and the outer wall was compared with other wall thickness positions, and it was found that the cooling heat dissipation capacity was large and the temperature was high. Therefore, there is post-cooling shrinkage, the thicker the inner rib, the greater the stored heat, and the more serious the post-shrinkage.
PVC pipes are generally used together with PVC pipe fittings. After all, the routing of PVC water pipes will be bent. Usually, one of the more used fittings is the tee, then if you use the PVC pipe tee What should I do if the water leaks, and how was it removed?
1. If there is a water leakage problem in the PVC tee, find a way to cut off the leaking PVC pipe first. This is also a relatively simple way to deal with water leakage, and the operation is not particularly difficult.
Then, close the water valve and use a small hacksaw to saw off the leaking area. Pay attention to the saw cut to keep it flat. Then use sandpaper to clean the interface, wipe the port with a rag, and apply special glue to the interface.
When it is dry, apply glue to the inside of the PVC tee, and turn the port and the bamboo joint repeatedly until it is firm. This is the fastest way to compensate for the leakage of PVC tee.
2. If the water leakage in the three-way joint is serious, you can choose to replace the three-way, because after a long time of use, this part may appear rusty or corroded, and there are signs of aging. It is better to replace it in advance to avoid Water leakage occurred again later.
3. If the tee can still be used, it may be that the rubber pad is aging and needs to be replaced with a new one. Apply a layer of white paint to the joint, then wrap the raw material tape, and install it later to avoid water leakage again.
PVC pipe are generally divided into PVC water supply pipe and PVC drainage pipe. It has strong acid and alkali resistance, flame resistance and aging resistance. It is widely used in various decoration projects and is a popular decoration material. So what is the difference between PVC water supply pipe and PVC drainage pipe? Let me introduce the difference between them.
The difference between PVC water supply pipe and PVC drainage pipe
1. Different uses:
PVC water supply pipes are mainly used for: a. Indoor water supply systems for civil and industrial buildings; b. Buried water supply systems for residential quarters and factories; c. Urban water supply piping systems and so on.
PVC drainage pipes are mainly used for: construction drainage and domestic sewage drainage.
2. Different specifications:
There are many specifications and models of PVC-U water supply pipes in order to meet the requirements of various projects;
PVC-U drainage pipes have relatively few specifications and models, because the drainage system itself does not require too many specifications.
3. Different pressures:
Water supply pipes have requirements for pressure. The nominal pressure of water supply pipes is specified as: 0.6Mpa, 0.8Mpa, 1.0Mpa, 1.25Mpa, 1.6Mpa, etc. 5 types.
Drain pipes usually do not need to consider pressure.
4. Different environmental standards:
The water supply pipe needs to be tested for environmental protection before it can be used.it need health indicators, non-toxic, non-pollution and other testing indicators
On the contrary, the drainage pipe does not have high requirements for environmental protection;
5. Different quality
PVC water supply pipes require stricter quality and specifications compared to drain pipes. They need to pass a pressure test to ensure that the water pipes will not leak.
PVC-U water pipe glue moisture is water supply pipe glue and drainage pipe glue
① Water supply glue can be used for drain pipes, but not vice versa.
② The bonding strength of PVC water supply pipe glue is higher than that of drain pipes, and the composition is non-toxic; while the strength of drain pipe glue is lower, and its pressure resistance is also worse, and it may be mixed with toxic ingredients.
Therefore, if the water supply pipe is connected to the drain pipe, it can only be used in the drainage system, and it is prohibited to be used in the water supply system.
We are a manufacturer of PVC pipes and fittings. We can customize PVC pipes and fittings according to customer requirements, such as different thicknesses, special shapes, whether they need to be bent, and so on.For specific information, you can view :
Today, I will mainly talk about the water seepage problem ofPVC pipes. Now I will explain from the following two aspects: one is the various reasons that cause the water leakage of the PVC pipe; the other is how to deal with the water leakage of the PVC pipe;
A. Reasons for water leakage of PVC pipes
PVC pipes are mainly used for non-pressure conditions, mostly for intermittent water flow. Generally, the water leakage will not be too serious. As long as it is not buried and concealed, most of them are better to deal with; in the analysis of the reasons, it is actually at the same time Also talked about the precautions about it;
1. PVC glue problem
The main function of PVC glue is to weld PVC pipes. If there is a problem with this, there will undoubtedly be a water leakage problem; the main manifestation is that the glue expires and fails; under normal circumstances, it is almost a transparent viscous colloid, which may be out of shelf life. If it turns yellow, it is more likely to deteriorate and turn yellow after opening. In these two cases, it is best not to use glue;
2. Irregular construction of PVC glue
The standard method is: the bonding object is of the same material, the overlapping surface of the bonding object must be cleaned in place, there must be no oil, mud, watermarks, etc., keep dry and clean; the overlapping surface of the bonding object must be evenly applied to the PVC glue, After that, let it stand for about one minute (adjust the rest time appropriately according to the temperature), and then the two are connected tightly. During continuous operation, try not to apply force to the welded part. Temporarily solidify for about five minutes. The final setting is normally 24. After hours (adhesive solidification has a greater relationship with temperature);
3. Damage caused by an external force
including artificially caused by external force and irregular pipeline construction; the former, such as external impact, impact, etc., and the latter, such as the PVC pipe is not fixed in place, and the joint is damaged by long-term force;
4. The acceptance inspection is not done well
when it is done, the water inspection test is carried out. In this link, the construction staff will generally dismiss it, thinking that the construction is simple and unwilling to take the time to do it; water inspection is also a self-inspection process if there are problems, Generally, it can be checked; such as whether the inspection port is tightened, whether the glue is leaked, whether the material is damaged, etc.
the above is the cause of the leakage, and the following is how to deal with the problems caused by various reasons; the treatment surface must be kept clean and no water marks during the treatment;
1. Glue injection method
For small trachoma, gaps and cracks; generally use PVC pipe powder with PVC glue; use a saw blade to saw the PVC pipe to get fine powder, stir with PVC glue, and then inject the problematic point. If the problem is larger, it can be used with a hair dryer to speed up the solidification speed
2. Patching method
suitable for long and larger problem points; cut a section of PVC pipe of the same pipe diameter, which is slightly longer than the problem point, and split into two halves, the inner wall and the outer pipe wall of the problem point (Equal area) Apply PVC glue, let it stand, close it, and then tie it up
3. Cut-off method
for the problem point, cut off the two ends directly, and connect the pipes at both ends with the corresponding direct fittings; this is generally handled by a professional master, which is a certain degree of difficulty;
4. Other miscellaneous methods
such as transparent tape processing, waterproof tape processing, glass glue processing, plugging king processing, and even universal glue processing, etc.; some of these have some effects
Here is a direct way to deal with various problems. If the hidden dangers are still there, they must be dealt with in time, otherwise similar problems may occur again; for example, if the elevator is not installed in place, it leads to the connection. Due to long-term stress, then this elevator problem must be solved together
