Water treatment, pipeline is essential for conveying liquid, gas, or a mixture of gas and liquid device, its diameter usually determines its ability to transport, is today and everybody know what is the difference between the diameter of DN and De in the pipeline?
DN :
DN is the nominal diameter pipeline, note: This is not the diameter should not diameter; early development and pipeline engineering and related units are commonly used to describe; galvanized steel pipe, as it corresponds to the relationship between and imperial units:
4 in charge: 4/8 inches: DN15;
6 in charge: 6/8 inches: DN20; 1 inch tube:
1 inches: DN25; inch tube: 1 and 1/4 inches: DN32;
Inch tube: 1 1/2 inches: DN40;
Tube: 2 inches DN50 inches;
Three inch tube: 3 inches: DN80 (many places also marked as DN75);
Four inch tube: 4 inches: DN100;
De :
De mainly refers to the outside diameter of the pipeline, the general use of De marked, are required to be marked into the outer diameter of the wall thickness of the form of X; mainly used to describe: seamless steel pipe, PVC and other plastic pipes, and other need to clear the wall thickness of the pipe. Take galvanized steel pipe as an example, using DN, De two methods are as follows:
DN20 De25×2.5mm
DN25 De32×3mm
DN32 De40×4mm
DN40 De50×4mm
We used to use DN to mark the welded steel pipe, not involved in the wall thickness of the rarely used De to label pipeline; but marked plastic pipes is another matter; or with the habits of the industry, the actual construction process, we briefly call 20, 25, 32 pipe refer to De but, not to DN, here is a specification. Do not make it clear that it is easy to cause losses in the procurement, construction process.
With nothing more than two kinds of pipe materials: screw connection and flange connection. Other connections are used very little.
Galvanized steel pipe, PPR pipe can be used more than two kinds of connection, only less than 50 of the pipe threads more convenient, more than 50 of the flange is reliable.
Note: if you are two different metal pipes. We should consider whether the original battery reaction, the corrosion rate will accelerate the active metal pipeline, it is best to use the flange, and two kinds of metal separated by insulating material of rubber gaskets, including gaskets bolts should be separated to avoid contact.
De, DN, D, Phi said the scope of their respective! De – PPR, PE pipes, polypropylene pipe diameter DN – Polyethylene (PVC) pipe, cast iron pipe, steel plastic composite pipe, galvanized steel pipe nominal diameter a
D – nominal diameter of concrete pipe.
Phi (read FAI) – seamless steel pipe nominal diameter, the specifications for the 100:108, such as Phi x 4
DN15-ф22mm，DN20-ф27mm，
DN25-ф34mm，DN32-ф42mm，
DN40-ф48mm，DN50-ф60mm，
DN65-ф76(73)mm，DN80-ф89mm，
DN100-ф114mm，DN125-ф140mm，
DN150-ф168mm，DN200-ф219mm，
DN250-ф273mm，DN300-ф324mm，
DN350-ф360mm，DN400-ф406mm，
DN450-ф457mm，DN500-ф508mm，
DN600-ф610mm，DN15-ф18mm，
DN20-ф25mm，DN25-ф32mm，
DN32-ф38mm，DN40-ф45mm，
DN50-ф57mm，DN65-ф73mm，
DN80-ф89mm，DN100-ф108mm，
DN125-ф133mm，DN150-ф159mm，
DN200-ф219mm，DN250-ф273mm，
DN300-ф325mm，DN350-ф377mm，
DN400-ф426mm，DN450-ф480mm，
DN500-ф530mm，DN600-ф630mm。
