ASME B16.5 Class 150 Threaded Flanges
A threaded flange is a type of flange that is threaded to the pipe. Designed with a loose flange. The advantage is that no welding is required and the additional torque generated on the cylinder or pipe when the flange is deformed is small. The disadvantage is that the flange is thick and the cost is high. Suitable for connection to high pressure pipes.
Threaded flanges are made by machining the inner bore of the flange into a pipe thread and connecting it with a threaded pipe. It is a non-welded flange. Compared with the flat welding flange or the butt welding flange, the threaded flange has the characteristics of convenient installation and maintenance, and can be used on some pipelines where welding is not allowed on the site. Alloy steel flanges have sufficient strength, but are not easy to weld, or the welding performance is not good, you can also choose a threaded flange. However, when the pipe temperature changes sharply or the temperature is higher than 260 ° C and lower than -45 ° C, it is recommended not to use a threaded flange to avoid leakage.
Details of Threaded flange
They are the special type of pipe flanges which can be attached to the pipe without welding.
1. Threaded flange 2. Thread 3. Pipe or Fitting
Threaded flanges are often used for small diameter, high pressure requirements. thread flanges with a hub have published specifications that range from 1/2″ thru 24″.
Pressure class: Class 150 to Class 2,500, PN 2.5 to PN 250
Facing: RF / RTJ
Thread flange advantages and disadvantages
The threaded flange is a type of flange structure widely used in engineering construction. It has the advantages of convenient installation on site and no need for welding. Threaded flanges can be used on some pipelines where welding is not allowed on site, and can be used in applications where flammability, explosiveness, and height, as well as extreme hazards. Such as air conditioning water systems, etc., can be used safely. For example, the pipe fittings used to collect water at home are threaded. However, it is recommended not to use a threaded flange to avoid leakage when the pipe temperature changes sharply or the temperature is higher than 260 degrees below 45 degrees below zero.
Uses of threaded flanges :
Threaded flanges are threaded in the bore which match an external thread on the pipe. Threaded flanges are used with pipes that have external threads. The benefit of these flanges is that it can be attached without welding.
Threaded flanges can be fitted to pipes of various sizes without welding and this is one chief benefit for which these flanges are highly demanded.
They can be used in extremely high pressure applications, particularly at or near atmospheric temperature, where the necessary post weld heat treatment is not possible.
They are ideal for small diameter piping applications.
They are economical and time saving devices.
These threaded flanges are normally designed for non-cyclic applications.
The flanges are suitable to be used in applications where welding is hazardous.
They can be used in highly explosive areas.
