What is the definition of RETAINERS according ASME IX 1

[Dominique5058]

Hi,

Can you give me the definition of the word RETAINERS according code ASME IX
What are the difference between the word RETAINERS with the word BACKING
Thanks you for your help
Dominique5058

 

[metengr]

Retainers as used in Section IX are designed to hold metal metal are not part of the weld nor fuse with the weld deposit.

Backing is where welding is performed against either existing weld metal or a fusible material.

 

[unclesyd]

Adding to the post by metengr here are links to Robvon, backing rings, and Cerbaco, ceramic retains.
A learning curve is needed using either one. Neither can be used as crutch during a weld job, they are used to make a sound weld.

http://www.robvon.com/

http://www.cerbaco.com/index.html

 

[Dominique5058]

Thanks you metengr and unclesyd
If i understand your responses, the retainers is also a non-consummable backing
You agree ?

 

[metengr]

It can be considered as one form of backing.