Pipe 3 4 inches: features and types

27-08-2018
Pipes

When designing water and gas systems, masters very often encounter the fact that there are various ways of designating a diameter. At the same time, it is necessary to say that in fact it is not only the features of the designation, but also completely different products. Therefore, it is very important to know the diameter of the pipe 3 4 in mm, and understand its combination with products from other countries that have a different label.

Amateur photo of a pipe with a given diameter

Features determine the diameter

To begin with, it must be said that in most countries of the former Union an inch system of identification for gas and water products is used. However, they usually denote the distance between the outer walls and only approximately.

At the same time, in some countries of Europe and America, pipe sizes of 3–4 inches correspond exactly to this value, which means that special adapters should be used when joining such materials.

Table of the reduced relevant parameters of inch products with an indication of their values ​​in millimeters

Sizing

First of all, it is worth mentioning that when drawing up projects, specialists use reference books, where all the necessary values ​​are indicated in accordance with GOST.

Therefore, they enter into the plan only the designation of the necessary products in order to avoid confusion during installation.

Copper products of this type are usually made in strict accordance with the specified diameter in inches, which means that their diameter will be 19.05 mm
  • However, if the work is done by hand it is necessary to know the parameters of the most used materials, one of which is a product with a given diameter. It should be understood that we are talking about water and gas systems.
  • It is worth noting that the pipe diameter in mm 3 4 inches usually depends on the wall thickness. However, if we talk about products for water supply, the internal parameter will be 20 mm, and the external one. At the same time, most often, attention is paid to throughput, since there are special dies in the inch system for threading.
Plastic products usually correspond to internal dimensions, as the basis is the material throughput
  • It should also be mentioned that the size of the pipe 3 4 in length may also be different. The fact is that there are certain standards for this parameter, but experts with a large order prefer to purchase uncut material. So you can save quite well, because businesses give him a discount.

Tip! You should never forget that plumbing systems have a certain difference from pipes that are used for other needs. It is also necessary to remember that pipe thread is a separate type of connection organization, and is not similar to other types of such cuts.

Special coupler that provides the right transition from one type of pipe to another

Material and thread

It should be noted that 3 4 pipe in mm may have different parameters depending on the material from which it was made. In this case, the internal diameter is usually kept intact, and only the wall thickness is changed. That is why the designation in inches is approximate and given in such quantities.

Rules for the manufacture of threads and docking of two systems with different dimensions

When 3 4 pipe threads are needed, craftsmen usually acquire three dies for cutting pipe threads. The first is a rough cut, the second is completely clean, and the third is considered to be the finish, since it removes all minor defects and slightly deepens the notch. In this case, this method of manufacture allows you to ignore the error in the outer diameter.

If copper pipe 3 4 is used, it is necessary to know that its parameters may differ significantly from steel products. For example, its internal diameter is usually 19.05 mm and the wall thickness does not exceed 1.07 mm. In addition, such material is sold in coils and is joined by soldering.

Tip! Sometimes it is better to first make all the necessary measurements and calculations than to look for rare adapters or try to create a joint with different dimensions on your own.

Table of parameters for the manufacture of threaded connections on water pipes

Recommendations of the masters

  • It is best to make threading on special equipment with the purchase. Usually the price of such a service is low, and the cost of a tool for independent work may not pay off even from two small objects.

    Usually all fittings that are used in the manufacture of the pipeline, have a special marking, which indicates what diameter of the pipe they can be used

  • Products with this diameter are very popular, which means that you can always find products at a more reasonable cost. However, you should immediately pay attention to quality. (See also the article Fittings for pipes: features.)
  • Typical installation instructions recommend using such pipes for the manufacture of gas and water mains. However, modern man will always find a lot of additional uses for this material.
A piece of pipe of this type with threaded

Conclusion

After studying the video in this article, you can learn more about these types of pipes and their features. In this case, taking into account the article that was cited above, it is necessary to conclude that the concept of the diameter of such products is very relative, and may depend on the mass of various factors.

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