Build Daily

August 12, 2017 18:07

Pike polypropylene pipes with his own hands

Plastic pipes are practically the ideal solution if you want to build a robust pipeline.They are durable, have good strength and are low cost.Nevertheless, such pipes also provide a leak periodically.This is mainly due to a violation of the process of soldering pipes and the mistakes made in this case.In the presence of a soldering iron and a suitable tool, soldering polypropylene pipes will be possible even for the novice.

Content

  • Required tool for soldering pipes
  • Accessories for pipe connections
  • What methods of joining pipes of PVC exist
  • soldering technology polypropylene pipes
  • Common mistakes when soldering polypropylene pipes
  • Useful tips

required tool for soldering pipes

Main that need to work - this is a special solder for polypropylene pipes, through which produces brazing and welding.The device must be selected taking into account the specifics of the work.If you are planning a one-time or infrequent use of the device, it makes sense to take it out.1

Besides it, and require the following:

  1. Teflon packing required diameter mounted under the tube.
  2. Special cutter or cutting PVC pipe scissors.It is advisable to first make the wrong segment of pipe that the tool is well sharpened.This is necessary to avoid deformation or burr on the cutting tube.
  3. agent for degreasing and cleaning the surface of the PVC pipe from contamination.
  4. cleaning rags.
  5. Files with fine-grained coating or as few Needle.
  6. shoe or installation knife.It is made from scrap metal 10 cm wide, which should cut at an angle of 45 ° and sharpen.
  7. for applying markings need a pencil or thin marker.To make it easier to remove the mark, use an ordinary marker.If there is a need to maintain the marks, the need to purchase a permanent marker, which is substantially erased without special tools.
  8. For accurate and correct assembly requires trimming and tape angle, and with which will be made exact laying pipe sections relative to each other.

The process of soldering pipes is technically simple, but the connection is required to perform with great care, since it is often the defects in soldering entail further problems.

Accessories for pipe connections

pipe sections are connected by fittings that represent a connection portion of the pipeline.They are mounted at locations of turns or branching pipes, but also serve to seal the connection or overlap.Depending on the application, fittings are divided into several varieties:

  • outlets, allowing you to change the direction of the pipeline,
  • tees to form a branch in one direction from the main pipe,
  • cross lead to the retraction in both directions from the main pipe,
  • fittings-perehodniki able to reliably interconnect pipes of different diameters,
  • plugs are used in those cases when it is required to provide a hermetic sealing of the ends of polypropylene pipes,
  • if welding polypropylene pipes involves the subsequent connection of tubing with a flexible hose, the connecting fittings are used.

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fittings are distinguished by their reliability and durability.Thus, they are widely distributed in the market as connection elements for water supply systems with different temperatures passing water.Polypropylene compounds differ from the plastic fittings, which are not as sensitive to the temperature of the water and can withstand high temperatures up to 100 ° C, and a chemically aggressive environment.

material can last up to 50 years, and at the same time even simple plastic fittings do not corrode or rust, and will not require replacement due to wear and tear.Also, their final price will be another significant advantage in the direction of selection is such a fitting element.

What methods of joining pipes of PVC exist

Experts are several types of compound polypropylene pipes, each of which is suitable for certain queries:

1. flare connections are used in the pipes, which the manufacturers provided them with sealing rings made of rubber.These pads allow to pipe joints sealed, and the work itself for installation water supply system is greatly simplified.the connection method is as follows:

  • with pipes chamfered and applied to the pipe segment entry stamp in the compound,
  • the O-ring is applied The adhesive composition based on silicone,
  • further elements of the pipes are connected to each other so that the axis coincided marks,
  • pipes are connected to each other and the connection socket is ready.

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2. Flanged implies a use of the connecting fitting.The process itself takes place in the following order:

  • prepared segments of the pipe trimmed at the ends,
  • on the section of the tube is worn flange and rubber gasket,
  • flange is pushed to the very gasket and then connects to another section of pipe by means of bolts with flanges,
  • all the bolts are tightened evenly, not in full force, so as not to move the structure, and in advance, to be placed level.Then finish tightening already made all the elements.

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3. Cold welding polypropylene pipes implies a connection of pipes and fittings with the help of adhesive.This method allows you to make connections between the pipes without the use of a soldering iron.But we must remember that this ration will ensure reliability of the design, especially if it is assumed that the system will be subjected to stress.As such, is usually the high pressure in the water or large water temperature.Installation consists of the following steps:

  • with pipe ends removed facet.The cut is carried out at an angle of 15 °, to to prevent further scraping of adhesive to the fitting threads,
  • on pipe sections coated measuring mark, thanks to which will be carried out visual inspection of the installation is correct,
  • using alcohol-based cleaning agents removing dirt and plastic partsa tube connecting portion,
  • further bonding over the entire surface and inside of the fitting using ordinary adhesive solution was applied to the brush,
  • pipe lengths are inserted into the fitting, and are turned on for ¼ of a turn to more evenly distribute the adhesive on the pipe surface.This will allow you secure the sections of the pipe in the fitting,
  • using a rag or cloth produced removing adhesive residue that could act outside of the connecting elements,
  • in completing the process of adhesive allowed to dry naturally, without putting the collected portion of the pipeline in anyloads.

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These connection methods are well suited for systems with small loads or as low pressure and low temperature running water.Polypropylene pipes are able to withstand high temperatures, in contrast to the plastic.But it is important to remember that self adhesive when exposed to heat is able to break or time to melt, leading to disruption of the integrity of the system and its subsequent rupture.To avoid this, the pipes to be joined together by soldering or welding.These two methods have much in common, and often under them involve the same steps.

soldering technology polypropylene pipes

Any work implies the need for a preliminary preparatory phase of works, which includes the following steps:

  1. pipes at the joints are subjected to a thorough cleaning and degreasing.This is done by using detergents containing alcohol.
  2. the field, entering the pipe into the fitting, using a pencil or marker is applied to the mark.As it is controlled visually correct entry section of pipe into the fitting.
  3. With all the polypropylene tube at an angle of 15 ° chamfer.This is to ensure that the tube fits tightly into the connecting fitting.

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After the preparatory work has been produced, it is necessary to proceed to the connection pipe.In fact, it consists of four steps:

  • cutting,
  • heated to the desired temperature,
  • connection pipe pieces to each other in the fitting,
  • cooling.

Cutting of pipes is carried out using a special tool called cutter.He is a well-sharpened scissors with blades that their views are more like-pruner shears for gardening work.Spike held a soldering iron.

soldering temperature of polypropylene pipes is 250 ° C, and the work should be carried out with due speed to the connection elements do not have time to cool down.It is important to carefully study the instructions specified in the time on the heating elements, as if they overheat, the coating is deformed.The ends of the pipe and fitting dress on the tip of the soldering iron and heated for a specified time.After heating elements are simultaneously removed from the handpiece and inserted into each other.Of course the connection pipe is fixed, after which it is not making any stress.Thereafter, the finished mix is ​​allowed to cool, and the work performed.Pike polypropylene pipes, video lesson of which shows its lightness, still require a little care.7

Common mistakes when soldering polypropylene pipes

Despite the technical simplicity of the soldering process, there is a sufficient number of common mistakes often permitted in the absence of experience and rush:

  1. Improper alignment of the connecting elements is a major cause of defects.If the pipe is inserted into the fitting is not until the end, then the gap will be caused to have a lower pressure and wall thickness.Most often such a situation arises, if after the heating pipe tightly enough introduced into the fitting.This does not mean that during soldering a pipe to be inserted with considerable force.In this case, the actual occurrence of another error when between the end of the pipe and the internal focus squeezed out the excess molten material, which is also called "grata".It will reduce walkable properties of fluid flow and will prevent him, at the same time increasing the load on the coupling element.
  2. incorrectly exposed soldering temperature.The optimal value is 260 ° C, with an analysis of acceptable values ​​for the plus / minus 10 ° C.Moreover, this value is equivalent to all the tubes irrespective of their diameter.It is important to avoid overheating of the soldering iron to maintain the necessary tension in the material.In addition, it is important not stack, and the cooling of the material before all elements are interconnected.
  3. The wrong equipment for soldering also serves as one of the errors.There is a certain pattern of power relations used a soldering iron in relation to the diameter of the pipe.For soldering pipes with a diameter of 50 millimeters is required heater power of 500 watts, with a diameter of 100 millimeters - a heater of 1000 watts.

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Useful tips

To work was completed successfully and on time, it makes sense to stick to these tips to help in the work:

  • pipe and fittings shall be submitted by one manufacturer.In this case, the economy is inappropriate to buy low cost connectors if desired, a pipe vice versa - expensive.This is important, since the melting point in this case is often not the same, which implies for the final structure a monolithic,
  • claimed soldering temperature must keep 260 ° C, it is not necessary to operate in high temperature conditions in order to save time.It is questionable, but the likelihood of damage to the material - high,
  • connecting elements must be thoroughly cleaned and degreased from dirt.Even a small amount of dirt can disrupt the quality of the connection,
  • before mounting and soldering it makes sense to practice on the pipe segments to hone skills and the required force applied to the connection.Since the lack of effort on the contrary, excessive force inserting the pipe into the fitting - a common mistake,
  • savings are always inappropriate, if desired, to build a reliable system.Do not skimp on materials, equipment and tools, anyway.Quality products last longer,
  • soldering work can not be carried out at temperatures below + 5 ° C heat.Otherwise, the efficiency drops significantly.In this case, the compound becomes brittle and require more heat fasteners.It is dangerous to their deformation and excessive melting.

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As in any work, soldering should be carried out, adhering to the basic niceties:

  • commitment to quality,
  • orderly,
  • care,
  • thorough implementation of the preparatory work.

In this case, the soldering of polypropylene pipes, the price of which, and so pleasing to the budget, will not make to bear additional costs when redoing work and detection of defects in the system.