Sdr polyethylene pipe marking and application

Recently, polyethylene pipes (PE) have become very popular, and, the area of ​​their application is very extensive. In this article we will look at the marking of these pipes, as well as consider their features and areas of construction in which they are applied.

Marking

What does SDR mean

First of all, let's consider what an SDR pipe is. So - this abbreviation means the ratio of the outer diameter to the wall thickness.

Thus, SDR is calculated by the formula - SDR = D / R, where:

• D - means external diameter;
• R - The wall thickness of the product.

Accordingly, the greater this value, the thinner the wall. For example, the SDR 17 pipe - its marking means that the external diameter of the product is 17 times greater than the wall thickness.

PE grades

In addition to the SDR, the marking uses a letter ("PE") and a numeric, consisting of two numbers. For example, pipe PE80 SDR11 - as it is not difficult to guess, PE says that the product is made of polyethylene. The numerical value corresponds to the minimum long-term strength of polyethylene (MRS), in this case it is 8 MPa.

The most popular products are brands PE100, PE80 and PE63. Pipe polyethylene, which is used in their manufacture, is obtained from a rigid polymer with a high degree of crystallinity and a linear structure.

The main distinguishing feature of the products of these brands is strength and density. In addition, they have good resistance to organic and inorganic acids, alkalis, salts and other chemical elements. True, their price is higher.

It should be said that there are PE 32 SDR products, the production of which is regulated by GOST? 18599-2001. Most often they are used in the field of sewage drainage systems of water supply, with a nominal pressure of not more than 2.5 atmospheres.

The most popular brands and their purpose

At first glance it may seem that the most high-quality and durable products are PE100 marking. However, each brand has its own specific purpose. Therefore, below we consider the most common brands and their purpose.

PE100

A characteristic feature of this brand is:

• High working pressure;
• Resistance to mechanical stress;
• Great strength.

For their production using certified raw materials. Due to the qualitative characteristics of the material, manufacturers managed to reduce the wall thickness of this product, and, as a result, its weight.

Most often PE 100 SDR pipe is used:

• At the device of gas pipelines and water supply systems;
• At the device of the pipelines giving food liquids, for example, milk, juice, wine and so forth.

PE80

The features of these products include:

• Ease;
• Wear resistance;
• Good strength.

For their production used medium pressure plastic.

Since the products of this brand are designed to work under low pressure, they are most often used for the following purposes:

• At the device of the free-flow and low-pressure sewerage in apartment houses.
• At the device of water supply systems of small diameter, located on a small territory.

Note! Experts do not recommend using PE80 products in some cases. In particular, as a result of the small thickness of the walls, it is not recommended to use them when installing the main pipeline and gas pipeline.

PE63

Polyethylene of this brand is characterized by the fact that it contains a large number of ethylene molecules.

Therefore, it is characterized by such properties:

• Short-term strength;
• Cracking tendency;
• Tendency to destruction.

As a result of these shortcomings, it is rarely used in industrial and civil construction. As a rule, products of this brand are used when constructing drainage systems for foundations, basements and road communications.

In addition, they are used when laying fiber optic lines and electrical cables. Sometimes with their help they organize the drainage of moisture from wetlands.

Pipes with different SDR

Products with different SDR have, of course, different properties, therefore, they are used in different areas of construction. Next, take a closer look at their features.

Brand 100 polyethylene

So, PE 100 products have the following qualities:

• Pipe PE100 SDR17 - is an indispensable material for the organization of gas pipelines and pressure water supply systems. They are especially in demand where large piping is required.
• I must say that the SDR17 are products of the new generation, which are obtained by applying modern technologies. As for the other features of the pipe PE100 SDR17 - technical characteristics allow it to be used when constructing pipelines with a large length, which is also an important advantage of them.
• SDR11 - made of polyethylene, made with low pressure. Due to the high density of the material, products can be used for high-pressure water pipes. Besides pipes PE 100 SDR 11 are often applied at the device of sewer collectors as they are steady against hostile environment. Their laying can be carried out in any soil.
• PE100 SDR21 - are intended for the device of water supply systems. According to experts, the water in this water supply has no taste, while the PE pipe 100 SDR17 and SDR11 spoil its taste.

Polyethylene brand PE 80

Products of this brand are the following types:

• PE80 SDR17 - is the optimal choice for low-rise buildings when installing plumbing. Such products have good durability and at the same time low cost.
• Pipe PE80 SDR11 - refers to the products of the new generation. Usually they are used to supply cold water. In addition, they can be used for gasification and sewage.
• PE80 SDR13,6 used for the repair and installation of water pipes for liquid chemicals.

PE 63 polyethylene

PE63 are manufactured with an SDR value of 11. Various kinds of polymers are used as the material for them. They can be used both for water supply, and for installation of sewer systems.

In addition, they are not rarely used as a protective case for communications power supply and communications.

Merits

Finally, consider the advantages of using pipelines of this type:

Note! Installation instructions for such polyethylene pipelines imply the use of a special soldering iron.

Conclusion

Polyethylene pipes with different SDR values ​​can be used for laying various types of pipelines. This possibility is explained by a large selection of brands with these or other properties. In addition, their important advantage is the excellent combination of quality and low cost.

From the video in this article, you can get more information on this topic.