Diameters of polypropylene pipes: everything that novice

19-05-2018

Pipes

When installing plumbing systems it is very important to choose the right material from which the pipes will be made. At the same time, special attention should be paid to their parameters so that they comply with the operational characteristics and installation rules. That is why it is very important to know the correspondence of the diameters of steel and polypropylene pipes in order to have a detailed understanding of these materials and their classification.

Amateur photo of products of this type of polypropylene with fittings of different diameters

Classification and size

To begin with, it must be said that there are different diameters for similar products. At the same time, they are measured very specifically, since each type of material has its own labeling and even a measurement system. Considering this, you first need to decide on which pipes will be used and what you need to get in the end.

Table of diameters of various types of similar tubes from a reputable manufacturer

Marking features

First of all, it is necessary to mention that the diameter of polypropylene pipes for heating, as well as other plastic products, is indicated in millimeters. At the same time, metal constructions usually use an inch measurement system.

Illustrative example showing the use of materials of different diameters in certain parts of the plumbing system

It should be noted that the internal diameter of polypropylene pipes 25 is calculated based on the wall thickness. The figure itself only indicates external parameters. Therefore, it is very important to know all the technical data about the selected product.
Considering these features, asking the question about what the internal diameter of the polypropylene pipe 32 will be is not quite correct, since each manufacturer has its own manufacturing criteria.. Because of this, the metal system is calculated in inches, and then with a kind of rounding.

A table showing the dimensions, wall thickness and water consumption of polypropylene materials, which shows the difference between products for hot and cold water

At times, to determine the internal diameter of polypropylene pipes 32 it is much easier to refer to the manufacturer’s specifications.. It must be indicated these parameters, or at least reported wall thickness.
There is also a special table for matching the diameters of polypropylene pipes and steel pipes, which greatly simplifies the design work, but it cannot display all the varieties of these products..

Tip! In order not to experience difficulties during installation, it is best to purchase all elements of the system from the same manufacturer. In this case, the transition points of metal and plastic are selected separately, comparing both materials.

The use of materials with three different diameters is not required when wiring, but in input systems or when creating risers, one has to deal with such a technical task

Selection process and scope

Usually a polypropylene pipe with an inner diameter of 20 is used for internal distribution of plumbing systems. It is believed that this is the most optimal type of material for this type of work.

Usually, all such products are standardized in order not to complicate the soldering process, but there are manufacturers who use their state-of-the-art standards and produce the appropriate tool.

Installation instructions recommend using material with a diameter of 32 or even more to create risers. It depends on the number of consumers and the height of the feed. However, in some cases, this parameter can be affected by the pressure in the system.

The outer diameter of the products is also of great importance, since the type of hose clamps or repair couplings used depends on it.

For the organization of supply or piping in the basement of an apartment house using polypropylene pipes of large diameters. In fact, from the moment of leaving the reservoir to the consumer, this parameter is constantly decreasing when it is divided or discharged. If the pressure is not enough, then the designers are planning to install additional equipment to solve this problem.

Tip! It should be noted that the recommendations on the scope of this article are given conditionally. Therefore, if pipes are being replaced, then it is necessary to use material with exactly the same parameters. Otherwise, you should strictly follow all the instructions of the previously developed project, which was created by experts.

To avoid discrepancies in the sizes of pipes and fittings, experts recommend using materials from the same manufacturer, even if it will be an order of magnitude more expensive than using third-party fittings.

Recommendations of the masters

If the work is done by hand, it is very important to follow all the rules of installation and strictly follow the project. Changing the diameter yourself is not recommended. Sometimes even minor changes can lead to a violation of performance. (See also the article How to solder polypropylene pipes: features.)

In order to determine the capacity of a product, you can use a special table, but for this you need to know the cross-sectional area, which is calculated based on the diameter and wall thickness

It should be remembered that the price of pipes with a large diameter is much higher. Therefore, in order to avoid overspending, you should not use them where you can use products with smaller dimensions. However, you should not save much, so as not to damage the functionality.
For thick-walled materials requires a completely different approach. The fact is that such products have a strictly defined purpose, and all their characteristics are pre-calculated by the developers.
If the structure is going to be assembled with a special soldering iron, then it is necessary to check in advance the compliance of the nozzles with the selected material diameter. That is why experts use several sets of such products in their work.

Thick-walled products are designed for specific needs and need a separate approach, both during design and installation

Conclusion

After studying the video in this article, you can get additional data on plastic materials of similar purpose and their parameters. Also, taking into account the article proposed above, it is necessary to conclude that the diameters of metal and plastic pipes differ from each other. However, upon closer examination, this difference becomes insignificant.