Awarded as the best online publication by CIDC

What is the function of gap between adjoining root faces in butt weld?

What is the function of gap between adjoining root faces in butt weld?

In the design of butt weld strength, it is generally assumed that its strength is at least equivalent to the parent metal. To enhance proper welding operation, the gap between two metals to be welded should not be too small, otherwise the root would be inadequately fused during welding and the butt weld strength would be reduced. On the other hand, the gap should be not set too large because the weld metal would simply pass through it. The function of the gap between adjoining root faces is to increase the depth of penetration down to the root of the weld.

However, it is not always possible to have access to both sides of the butt weld. Hence, the use of backing plates or rings can enhance the quality of welding from one side only. By inserting a backing plate inside the steel member, the correct alignment could be maintained and certain amount of tolerance on longitudinal fit can be permitted

Advertisements

This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.

Share this post

Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.

Leave a Reply

Your email address will not be published. Required fields are marked *