Learn about Flanges (Flanges Fitting)
1. Flanges
Flanges are used when joints need to take apart, they are used mainly in equipment, valves, pumps ... On the request pipeline maintenance break out regularly, the flanges are arranged at distances determined on the pipeline. One joints Flanges including: Flanges, gasket and bolting. Flanges are categorized based on different ways as follows:
2. Based on how you connect with pipe
- Flanges can be classified based on how connected to the pipe as follows:
- Slip-on Flange
- Socket Weld Flange
- Screwed Flange
- Lap joint Flange
- Welding Neck Flange
- Blind Flange
- Reducing Flange
- Expander Flange Flange
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| eg : Flanges |
2.1. Based on pressure and temperature range
- Follow ASME B16.5 flanges Forged steel is made mainly includes 7 categories according to the ratings:- 150 #
- 300 #
- 400 #
- 600 #
- 900 #
- 1500 #
- 2500 #
- Reliability The of Flange increases with Class Rating.
- Flange Standard: ASME B16.5, BS1560, DIN or API6A...
- Schedule (WT): Weld neck Flange, suitable with pipe schedule.
- Flange material Specification: suitable with Pipe material specification
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| Table for selection material |
Pressure - Temperature Rating (range of pressure - temperature): For each Flange Class, at a working temperature, Flange can withstand a working pressure respectively.
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| Pressure-temperature rating table |
Example: Flange materials group 1.8, class 300, the temperature at 3000F can work with a maximum pressure of 555 psi is.
3.1. Based on Facing
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| Flanges |
Flanged can also be classified based on the following Facing:
- Flat face (FF)
- Raised face (RF)
- Tongue and groove (T/G)
- Male and Female (M/F)
- Ring type joint (RTJ)
=> Flat face, Raised Face Flange for Rating less than or equal to 400.
=> Ring joint can be used for larger Rating Flange with 400.