September — 2011 — The Expansion Joints Blog

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Archive for September, 2011

New 2011 Expansion Joint Catalog

September 26th, 2011 Comments off

New 2011 Expansion Joint Catalog
To get your copy, fill out the request form. A number of improvements have been implemented based on valuable feedback from our customers and engineers.

- all new photographs
- a brand new section on past projects
- more expansion joint data tables

You can now download the expansion joint data tables from our online catalog.

Reasons to Choose a Fabric Expansion Joint versus Metal Expansion Joint

September 19th, 2011 Comments off

Reasons to choose a fabric expansion joint

Reasons to choose a fabric expansion joint:

  • Good for high temperature applications
  • High movement capabilities
  • No size restraints
  • Less expensive to design and fabricate
  • See more reasons in our catalog

Reasons to choose a metal expansion joint

Reasons to choose a metal expansion joint

42″ Diameter Neoprene Fabric Expansion Joint for a Generator Cooling Fan in a Power Plant.

September 12th, 2011 Comments off

42 Inch Diameter Neoprene Fabric Expansion Joint for a Generator Cooling Fan

This neoprene fabric expansion joint is 42″ I.D. by 7-3/4″ face-to-face and is designed for a generator cooling fan in a power plant. The angle frame ends are fabricated from carbon steel, and the neoprene fabric belt is fastened to the angle flanges by two stainless steel clamps. The expansion joint absorbs vibration between the air supply duct and the cooling fan. A dye penetrant exam was performed on the welds of the angle iron flanges prior to shipping to the customer ahead of schedule.

Dye Penetrant Testing Before and After Forming The Bellows

September 6th, 2011 Comments off

We perform dye penetrant testing on all bellows longitudinal seam welds before and after forming the bellows. The test is performed to insure there are no weld defects such as surface cracking or weld discontinuities. The weld surface is thoroughly cleaned and a red penetrant dye is applied to the surface of the weld and allowed to soak for a period of time. The dye is then removed and a white powder is sprayed on the weld surface that performs a blotting action. An indication of the dye with a white background characterizes the weld surface discontinuities of the bellows longitudinal seam weld. This testing before and after the bellows forming process ensures a sound quality bellows seam weld.

Procedure for Dye Penetrant Testing

Procedure for Dye Penetrant Testing

Examples of Dye Penetrant Testing

Examples of Dye Penetrant Testing

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