What is the difference between DN and DE, and what is the difference between DE and DN

dn - nominal diameter.

It is generally used for steel pipes. DE stands for outer diameter and is generally used for plastic pipes.

DE-- PPR, PE pipe.

Polypropylene tubing outer diameter.

dn-- Polyethylene.

PVC) pipes, cast iron pipes, steel-plastic composite pipes, galvanized steel pipes.

Nominal diameter. d -- nominal diameter of concrete pipe.

Seamless steel pipe.

The nominal diameter, the specification is, such as 100:108 x 4 The diameter of the general plastic pipe is represented by DE in engineering.

dn In general, cast iron pipes and ductile iron pipes.

Reinforced concrete pipes, galvanized steel pipes, welded steel pipes.

The outer diameter of the pipe is expressed in DN, which is called the nominal diameter of the pipe. For example: DN15 (4 branches), DN20 (6 branches) Nominal: nominal. d: diameter.

DN is neither an outer nor an inner diameter. But closer to the inner diameter. The pressure level is low, the wall thickness is small, and the dn is less than the inner diameter; The pressure level is high, the wall thickness is large, and the DN is larger than the inner diameter.

Check GB T 1047-2005 "Definition and Selection of Nominal Dimensions of Piping Elements" Note that there are no units.

dn - nominal diameter.

de: Equivalent calculated diameter.

inch: inch, unit of length, 1inch=

You're saying that the shortcut difference represented by this letter is not the same.

The nominal diameter is the size of all the piping accessories in the piping system expressed by numbers, and the nominal diameter is a convenient round integer for reference, which is only not strictly related to the processing size. Nominal paths are marked with the letters "DN" followed by a number.

Nominal diameter, also known as mean outside diameter.

This is due to the fact that the pipe is very thin from the metal pipe, and the outer diameter of the pipe is almost the same as the inner diameter of the pipe, so the average value of the outer diameter of the pipe and the inner diameter of the pipe is taken as the pipe diameter.

DN is the nominal diameter, and the nominal diameter (or nominal diameter) is the common diameter of various pipes and pipeline accessories. Pipes and pipe accessories of the same nominal diameter can be connected to each other and are interchangeable. It is not an actual outer or inner diameter of a pipe, although its value is close to or equal to the inner diameter of the pipe;

In order to unify the connection size of pipes and pipe fittings, the nominal diameter (also known as nominal diameter and nominal diameter) is adopted. For example, welded steel pipes can be divided into thin-walled steel pipes, ordinary steel pipes and thickened steel pipes according to their thickness. Its nominal diameter is not the outer diameter or the inner diameter, but a nominal size approximating the inner diameter of ordinary steel pipes.

Each nominal diameter corresponds to an outer diameter, and its inner diameter value varies with the thickness. The nominal diameter can be expressed in the metric system mm or in the imperial system. The pipeline accessories are also expressed by the nominal diameter, which means the same as the seam pipe.

DE is the nominal outer diameter, which refers to the outer diameter.

Generally speaking, the specifications from small to large are roughly as follows: DE (mm).

de20 de25 de32 de40 de50 de63 de75 de90 de110 de125

de160 de200 de250 de315……All the way up to DE800

Hello, the difference between dn and de: 1. The content of the representation is different. DN refers to the nominal diameter of the pipeline, which is neither the inner diameter nor the outer diameter, but is used to represent the average outer diameter of the pipeline.

2. The materials used are different. DN is usually used to denote the nominal name of galvanized steel pipes, while DE is used to indicate PE pipes or PVC pipes, as well as other plastic pipes, etc., which need to indicate the thickness of the pipes, and the pipes represented by DE are often used as gas, air, oil and heating steam.

The difference between de and dn is: dnNominal diameter. , de denotes the outer diameter. PE pipes.

Polypropylene tube outer diameter DN - polyethylene.

PVC) pipes, cast iron pipes, steel-plastic composite pipes, galvanized steel pipes.

Nominal diameter d nominal diameter of concrete pipe Nominal diameter of seamless steel pipe, its specifications are, such as 100:108x4 The diameter of the general plastic pipe is represented by de in the project Under normal circumstances, the outer diameter of cast iron pipe and ductile iron pipe, reinforced concrete pipe, galvanized steel pipe and welded steel pipe is represented by DN, which is called the nominal diameter of the pipe.

Conversion of de and dnDE can be converted to DN with a reducer inner or outer wire. Because DE stands for the outer diameter and DN stands for the nominal diameter of the inner diameter, if the DE outer diameter is converted to the inner diameter, it is necessary to use the reducer inner wire or the outer wire to convert it to the nominal diameter of DN. The inner or outer wire of DE50XDN40 can be directly turned into its nominal diameter and inner diameter.

Because the outer diameter of the DE tube is one tube model larger than its inner diameter, DE can be converted to DN with a variable diameter inner wire or an outer wire.

Difference between dn, dn, de, de:

dn stands for the nominal diameter of the tube, and DE stands for the outer diameter of the tube. Generally, welded pipes, cast iron pipes, galvanized steel pipes, etc. are represented by DN, and plastic pipes and seamless pipes are represented by outer diameter DE.

DN is the nominal outer diameter, which is generally marked on the pipe, and the outer diameter of the plastic pipe. The water supply pipe DN is the nominal diameter of the pipe, because the pipe wall of the metal pipe is very thin, and the outer diameter and inner diameter are not much different from each other, so the average value of the pipe is taken as the pipe diameter.

DE refers to the outer diameter of the pipe, and the numerical expression is the accurate outer diameter of the pipe, followed by the wall thickness parameter.

DE represents the outer diameter measured cross-sectionally at any point of the pipeline.

Tips for choosing water supply pipes.

When buying water pipes, observe whether the appearance of the water pipes is correct, whether the water pipes are deformed and bent, and other problems. Whether the surface of the water pipe is flat and whether the color is uniform. The outer wall of the pipe is clearly marked with the trademark, specification and production date.

In addition, it is necessary to check its sanitation certificate, if there is a water pipe that has passed the inspection of the health and safety department, and if it is not, it cannot be used for the installation of water pipes in the room.

Smell. Most of the water pipes are made of plastic, and the production of plastic water pipes is made using a mechanical extrusion production process. Water pipes that are not of substandard quality often have a pungent odor and thus cannot ensure the safety of people's water.

It is best for people to buy plastic water pipes without any smell when buying.

The differences between DE and DN are as follows:

1. Water supply and drainage major: the difference between pipeline DN and DE is like this.

2019-12-1808:15 Architectural Circle Story Sharing DN is the average inner diameter, DE is the outer diameter.

2. DN is the nominal diameter. It is known as nominaldiameter, also known as mean outside diameter. This is due to the fact that the wall of the metal pipe is very thin, and the outer diameter is almost the same as the inner diameter, so the average value of the pipe is taken as the pipe diameter.

Note: DN is neither an outer nor an inner diameter. It should be related to the imperial unit in the early days of the development of piping engineering, which is usually used to describe galvanized steel pipes.

3. DE mainly refers to the outer diameter of the pipeline, which is generally marked with DE, and it needs to be marked in the form of outer diameter x wall thickness. It is mainly used to describe: seamless steel pipes, plastic pipes such as PVC and other pipes that require clear wall thickness.

DN300 Pipe Meaning:

DN300 is a tube with a nominal diameter of 300mm.

DN generally refers to the nominal diameter, also known as the mean outside diameter (MeanOutside Diameter). It refers to the standardized diameter series of containers, pipe jujube celery and their accessories. <>

The difference between dn and is that the properties are different and the range of representation is different.

First, the nature is different.

1. DN: refers to the nominal diameter of the pipeline, which is the average value of the outer diameter and the inner diameter.

2. : The diameter of the ordinary circle; It can also be used to indicate the outer diameter of the pipe.

Second, the scope of representation is different.

1. DN: DN - the nominal diameter of polyvinyl chloride (PVC) pipe, reed cast iron pipe, steel-plastic composite pipe and galvanized steel pipe. Ode to the shirt.

2. Seamless steel pipes or non-ferrous metal pipes should be marked with "outer diameter wall thickness", such as: 108x4. e.g. 108 4, can be omitted.