What are threaded flanges

Threaded Flanges

Threaded flanges are similar to the Slip-On flanges, but the bore is threaded. Its chief merit is that it can be assembled withour welding, explaining its use in low pressure services at ordinary atmospheric temperatures, and in highly explosive areas where welding create a hazard.
Threaded Flanges are used for special circumstances with their main advantage being that they can be attached to the pipe without welding. Sometimes a seal weld is also used in conjunction with the threaded connection.

Materials used:

  • Stainless Steel
  • Alloy Steel
  • Carbon Steel
  • Cast Iron
  • Steel
  • Aluminum
  • Brass
  • Bronze
  • Monel
  • PVC
  • Thermoplastic etc.

How to measure threaded flange?

threaded flange - What are threaded flanges

Take the measurements of the following:

  • O: Flange Diameter
  • Q: Flange Thickness
  • X: Hub Diameter at Base
  • RF: Raised Face Diameter
  • BC: Diameter of bolt circle
  • L: Length through hub
  • T: Thread Length

Key Features:

  • No welding is required.
  • Good for small pipe sizes.
  • Should be avoided for larger loads, especially when subjected to higher torque.

Uses of threaded flanges:

  • 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.

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