What are the diameters of municipal drainage pipes and the diameter of municipal water supply pipes

The specifications of general household water pipes are: DN15 (4 pipes), DN20 (6 pipes), DN25 (1 inch pipe), DN32 (1 inch 2 pipes), DN40 (1 inch half pipe), DN50 (2 inch pipes), DN65 (2 inch half pipes), DN80 (3 inch pipes), DN100 (4 inch pipes), DN125 (5 inch pipes), DN150 (6 inch pipes), DN200 (8 inch pipes), DN250 (10 inch pipes), etc.

Water pipe 25 1 2 means that its outer diameter is 25. The actual corresponding nominal diameter is DN20 (that is, people often say 6 tubes). You can go and buy a 6-point faucet.

You can also go and buy a 4-point faucet (just add a variable diameter between the pipe and the faucet).

The style and material of household faucets are ever-changing, but the threaded parts connected to the pipe are divided according to the size of 4 points, 6 points, 1 inch, etc. Don't worry about buying the wrong one.

Usually the 4 subdivision is in inches, so the 4 subdivision is 1 2 inches (4 8 = 1 2), and one inch =, so the inner diameter of the 4 subdivision is, and this is the inner diameter of the DN15 water pipe.

4 points is the name of the diameter length of the imperial pipe, that is, 1 2 inches is equal to 15 mm in the metric system

1 inch is equal to 8 cents, which is metric.

6 points = 3 4 inches = 20mm.

4 points = 1 2 inches = 15mm.

In addition, keep in mind that the pipes are calculated with the inner diameter, but the threads of the pipes are calculated by the middle diameter, which is represented by the diameter DN, and the threads are divided into metric M and imperial G, and the pipe threads are generally made of inch, and the thread angle is 55 degrees. The metric system is 60 degrees.

Rainwater pipes, sewage pipes, etc., generally the diameter of rainwater pipes is larger. The classification is: below DN530, DN600-DN1000, DN1050-1400, DN1400 or more, anyway, there are various pipe diameters, mainly depending on the design needs.

Generally, the diameter of municipal drainage pipes is DN500mm, unless there is too much sewage collected along the way and there is no outlet, in this case, you can consider increasing the diameter of the sewage pipe. The so-called DN refers to the nominal diameter of the pipe, in the case of steel pipes it refers to the inner diameter, and DE refers to the outer diameter of the plastic pipe.

Commonly used DN300-DN2000

The following number means the inner diameter.

The diameter of the municipal water supply pipe is generally PE, and the diameter is from 20mm to 620mm.

Generally, the diameter of the water pipe is selected according to the outlet diameter of the water pump; The outlet pipe connected to the pump is not the larger the pipe diameter, the better, and the selected pipe diameter can meet the requirements of the flow rate and the resistance loss is reasonable.

The galvanized pipe is calculated according to the inner diameter, the inner diameter is 15mm=4 pipes, 20mm=6 points, 25mm=1 inch; PPR pipe and aluminum-plastic pipe are calculated according to the inner diameter, 16mm is equivalent to 3 pipes, and 20mm is almost equivalent to 4 points.

Galvanized pipe diameter. In general engineering calculations, the pressure of water pipelines is commonly used as follows: the flow rate of water in the water pipe is 1-3 meters per second, and it is often taken in meters and seconds.

Flow rate = pipe cross-sectional area x flow velocity = pipe diameter 2x flow rate (cubic meters per hour) 2: squared. Pipe diameter unit: mm

Pipe diameter = sqrt (flow rate).

sqrt: open squared.

The formula for saturated steam is the same as for water, except that the flow rate is generally 20-40 m/s.

Now generally do not use PVC to feed water, generally use PE,

Caliber from 20-620

Pressure from PE80:

pe100：

Summary. Drainage pipe diameter size comparison table: pro drainage pipe diameter size comparison table is as shown in the following figure pvc drainage pipe specification comparison table specifications pvc water supply pipe:

DE20, DE25, DE32, DE40, DE50, DE63, DE75, DE110PVC Drainage Pipe: DE50, DE75, DE100, DE125, DE150, DE200PVC Threading Pipe: 16, 20, 25, 32, 40, 50, 60, 75, 100 trunking width (mm) PVC water supply pipe

Drainage pipe diameter size comparison table: pro drainage pipe diameter size comparison table is as shown in the following figure PVC drainage pipe specification comparison line specification model PVC water supply pipe: DE20, DE25, DE32, DE40, DE50, DE63, DE75, DE110PVC drainage pipe:

DE50, DE75, DE100, DE125, DE150, DE200PVC Conduit: 16, 20, 25, 32, 40, 50, 60, 75, 100 Trunking Width (mm) PVC Water Supply Pipe: 20, File

Pipe diameter size comparison table:

Pipe diameter refers to the fact that when the pipe wall is relatively thin, 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. It usually refers to the general synthetic material or metal pipe, and the average of the inner diameter and outer diameter is taken as the pipe diameter when the inner diameter is large.

If the pipe material is concrete and other prefabricated or on-site poured materials, and the pipe wall is thick, the average of the outer diameter and the inner diameter cannot be taken as the pipe diameter value.

The pipe diameter specifications of water supply pipes are DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250.

Due to the different strengths of PE water supply pipes, they are divided into PE63, PE80 and PE100, among which PE63 is not suitable for buried pipelines, so PE80 and PE100 are the main ones.

Classification of steel pipes:

1. Pipes for pipelines. Such as: seamless pipes for water, gas pipes, steam pipelines, oil transmission pipes, and pipes for oil lines. Agricultural irrigation faucets with celery pipes and sprinkler irrigation pipes, etc.

2. Pipes for thermal equipment. For example, boiling water pipes, superheated steam pipes for general boilers, superheated pipes, large smoke pipes, small smoke pipes, arch brick pipes and high-temperature and high-pressure boiler tubes for locomotive boilers.

3. Pipes for machinery industry. Such as aviation structure pipe (round pipe, elliptical pipe, flat elliptical pipe), automobile half shaft tube, axle tube, automobile tractor structural tube, tractor oil cooler pipe, agricultural machinery square pipe and rectangular tube, transformer pipe and bearing tube, etc.

4. Pipes for petroleum geological drilling. Such as: oil drilling pipe, oil drill pipe (square drill pipe and hexagonal drill pipe), drilling straight, oil tubing, oil casing and various pipe joints, geological drilling and fiber pipe (core pipe, casing, active drill pipe, drilling straight, hoop and pin joint, etc.).

5. Pipes for the chemical industry. Such as: petroleum cracking pipes, chemical equipment heat exchangers and pipelines, stainless acid resistant pipes, high-pressure pipes for fertilizers and pipes for transporting chemical media, etc.

6. Other departments use pipes. Such as: container tubes (high-pressure gas cylinder tubes and general container tubes), tubes for instrumentation, watch shells, injection needles and medical devices, etc. <>