The flange (flange) can be used jointly with pipe systems and bolts in the pipeline system.
Regarding the terminology of the flanges, the author questions unsuccessful (ISO 7005-1: 2011 is all English). The interpretation of Baidu Encyclopedia of France is:
Bridle (bridle), also known as bridle drops or sudden edges. The flange is a part that connects between the axis and is used for the connection between the end of the pipe; It is also used on the importation of device and the export flange, which is used for connections between two devices, such as Decelerator France.
The current definition of the flanges in the terms of engineering tube of current petrochemical pipes “(SH / T 3051-2004) is as follows:
2.4.1 flange (flange), which is used to connect the division -shaped components with bolts in the pipes, equipment, etc.
This number begins with the French cover line.
Figure 1 France (on the Internet)
As shown in Figure 1, we can vaguely see the bridle flange: ANSI B16.5 2 ″ WN RF 150LB 304 and other information. Therefore, the standard system is very important.
Currently, the Chinese management standards of France are: National Standard GB, the Ministry of the HG Chemical Industry, the Ministry of the Machinery Standard JB and the Petrochemical Standard SH. The most complete standard of the bridles mentioned above is the standard of the chemical industry. Selection of designers.
1. The national flank system follows (GB BIDLE PIPE)
In 1988, the formulation of the formulation of the national standard of the national standard, from GB 9112-88 to GB 9123-88, abolished the “General Paraception of the size of the French connection” (GB 2555-81), ” General use in Frank Load The shape and size of the cover “(GB 2556-81), each standard is mainly formulated in accordance with the type of bridle. Standard 88 is very important to support equipment at the time.
In 2000 and 2010, the standards mentioned above were repaired and the recommended standards were recommended after the edition.
In 2019, my country joined 2 elements such as GB / T 91112 ~ 9124-2010, and according to the different standards of formulation of the type of flange.
“Part 1: PN series” (GB 9124.1-2019)
“Steel Management Flange Part 2: Class Series” (GB 9124.2-2019)
The latest version of the national standard of French standards is very similar to chemical standards, and can mainly replace standards of the chemical industry.
2. Flat type (GB tube flange)
Personally, the flange is classified according to the type of structure and the connection method with the tube (welding, flat welding, inheritance and thread welding). Each type is distinguished according to the different covers. Taking the example of the PN series, a total of 12 standard national flames are divided into 12 types, and all types are as follows.
2.1 overall
1. Global flange (code Si)
The global flange is a bridle connected to the device, like the flange on the valve. The global flange is mainly used in the manufacture of the equipment, and it is almost not used in the design of the pipeline.
Figure 2 Global flange (IF)
The lid is: plan (FF), suddenly (RF), Ruddy surface (MF), Tenon groove surface (TG), OSG surface (OSG), cycle connection surface (RJ).
2.2 Connection of the thread
2. Bring the Frank (Th) neck, as shown in Figure 3.
Figure 3 Bring the thread of the Frank (Th)
The lid is: plan (FF), sudden (RF).
2.3 Contracting welding connection
3. Insert the Frank welding (SW) with the neck, as shown in Figure 4.
Figure 4 Bringing the inheritance of the neck and the Frank welding (SW)
The lid is: plan (FF), suddenly (RF), Ruddy surface (MF), Tenon groove surface (TG), OSG surface (OSG), cycle connection surface (RJ).
2.4 Welding connection
4. For Frank welding (WN), as shown in Figure 5.
Figure 5 by welding Frank (WN)
The lid is: plan (FF), suddenly (RF), Ruddy surface (MF), Tenon groove surface (TG), OSG surface (OSG), cycle connection surface (RJ).
5. Type A PIN of welded flat type (PL / WA), as shown in Figure 6.
Figure 6 Type of a pair of welded cardboard pine flange (PL / WA)
The lid is: sudden (RF), Ruwu surface (MF), Tenon groove surface (TG), OSG surface (OSG).
6. Pair B type B of welded pine type (PL / WB), as shown in Figure 7.
Figure 7 Type B Type Pine-Type Pine Bride (PL / WB)
The cover is: sudden (RF).
7. Tube ending through the down -style costume (PL / PA), as shown in Figure 8.
fig
8. Pinon flange with short ping-ping panels (PL / PB), as shown in Figure 9.
fig
2.5 Flat welding connection
9. Bring the flat welding of the Frank (SO), as shown in Figure 10.
fig
The lid is: plan (FF), suddenly (RF), Ruddy surface (MF), Tenon groove surface (TG), OSG surface (OSG).
10. Flat welding of the Frank plate type (PL), as shown in Figure 11.
Figure 11 Type plaque Flat Frank (PL)
The lid is: plan (FF), sudden (RF).
11. Flat welding pine flange (PL / C), as shown in Figure 12.
fig
The lid is: sudden (RF), Ruwu surface (MF), Tenon groove surface (TG), OSG surface (OSG).
2.6 blocking
12. Bride (BL), as shown in Figure 13.
Figure 12 French coverage (BL)
The lid is: plan (FF), suddenly (RF), Ruddy surface (MF), Tenon groove surface (TG), OSG surface (OSG), cycle connection surface (RJ).
3. The corresponding relationship between the above classification and GB9124.1
The order of types above corresponds to the classification of GB 9124, as shown in Figure 13.
Figure 13 The corresponding relationship between the classification of the flange and the GB 9124
4. The bridle brand
In addition to the global flange, each bridle must use permanent signs such as steel printing and laser to clear and visible signs marked on the surface of the exterior cylinder of the bridle, as shown in Figure 1.
The content includes: manufacturer, specification number (no year number), type code, nominal size and pressure, material, etc.
The design drawings and markers on the flanges are as follows:
Named size, pressure, type, sealing, piping, standard materials and numbers, such as:
DN 400-PN25 WN RF ⅱ Q235A GB / T 9124.1
DN400: size named 400 mm;
PN25: 2.5mpa nominal pressure
WN: Sweat Frank
RF: sudden cover
Ⅱ: French connection rice system with diameter external to two systems
Q235A: The flat material is Q235A
GB / T 9124.1: Execution standards (no annual number)
Daguang focuses on providing solutions such as precision CNC machining services (3-axis, 4-axis, 5-axis machining), CNC milling, 3D printing and rapid prototyping services.
