flange type
Our company provides Pipe Flanges.
We provide flange products of various standards such as American standards, European standards, German standards, and Japanese standards. The list of common standards is as follows:
lewis Liu
sales Manager
Types of Flanges
The most used flange types are Welding Neck, Slip On, Socket Weld, Lap Joint, Threaded, and Blind flange. We usually consider two main families of flanges, the standard flanges, and the special ones.
Flanges are used to connect pipes, valves, pumps, and other equipment in various industrial applications. There are several types of flanges available, including:
here’s a table presenting common flange types along with their descriptions:
| Flange Type | Description |
|---|---|
| Weld Neck Flange (WN) | Characteristics: Weld Neck Flange has a protruding neck, the outer diameter of the neck is slightly larger than the diameter of the pipe. |
| Connection: Weld Neck Flange is usually connected to the pipeline by butt welding, i.e., the neck and pipe and end are welded, and this connection is relatively strong. | |
| Standard: ASME B16.5, ASME B16.47, ASME B16.48, API 605, DIN 2543, BS 4504, JIS B 2212, GB/T 9119 and so on. | |
| Application: Weld Neck Flange is mainly used in petroleum, chemical, natural gas, electric power and other industries with nominal pressure between 0.25-4MPa, where high pressure and high temperature require high sealing. | |
| Slip-On Flange (SO) | Characteristics: The flange of Slip-On Flange is the same or slightly larger than the diameter of the pipeline, and is sealed by gaskets and bolts, which is easy to install and dismantle. |
| Connection: The Slip-On Flange is connected to the pipe by placing a gasket and bolting to achieve sealing instead of welding.Connection: The Slip-On Flange is connected to the pipe by placing a gasket and bolting to achieve sealing instead of welding. | |
| Standard: ASME B16.5, ASME B16.47, ASME B16.48, API 605, DIN 2543, BS 4504, JIS B 2212, GB/T 9119 and so on. | |
| Application: Slip-On Flange is mostly used in places where the nominal pressure is generally lower than 2.5MPa and the temperature requirement is not high, such as water supply and drainage. | |
| Blind Flange (BL) | Characteristics: Blind Flange has no center hole or opening for connecting pipes, only a flat cover. |
| Connection: Blind Flange is connected to the adjacent flange by bolts. | |
| Standard: ASME B16.5, ASME B16.47, ASME B16.48, API 605, etc. | |
| Application: The Blind Flange is used for pipe termination, or for pipe maintenance, overhaul, pressure testing, and temporary connections to cut off the pipe to prevent leakage. | |
| Socket Weld Flange (SW) | Characteristics: Socket Weld Flange has a large difference between ID and OD, and the flange is connected to the pipe with a tab to prevent movement during use. |
| Connection: Socket Weld Flange is welded to steel pipe at one end and bolted at the other end. | |
| Standard: ANSI B16.5, HG20619-1997, GB/T9117.1-2000-GB/T9117.4-2000, HG20597-1997 and so on. | |
| Application: Socket welding flanges are mostly used in pipelines with nominal pressure less than or equal to 10.0MPa and nominal diameter less than or equal to 40mm. | |
| Threaded Flange (TH) | Characteristics: flange bore with thread. |
| Connection: realized by threads, the inner hole threads and pipe threads are used in conjunction to realize the connection. | |
| Standard: AMSE, ANSI, BSW, DIN, JIS, GB, etc. | |
| Application: Low pressure pipes where welding is not convenient. | |
| Lap Joint Flange (LJ) | Characteristics: Lap Joint Flange is easy to install and dismantle, convenient for maintenance and inspection. |
| Connection: Two flanges with gasket between them are connected together by lap joint and then bolted. | |
| Standard: ASME B16.50 | |
| Application: low pressure non-hazardous low pressure water and ventilation piping, or temporary connections that require easy disassembly. |
This table provides a clear overview of common flange types and their respective characteristics.
Click the picture below and you can view the corresponding parameter details table of different types of flanges.
