differences between Seal-welded seat ring and intergal seat 1

[mmbguide]

hello everybody

would you please tell me what are differences between these type of seat ring?
[ol 1]
[li]Seal-welded seat ring[/li]
[li]integral seat ring[/li]
[/ol]

dose any of them should be welded on body?

thank you

 

[MickMc]

IMHO

1. is self explanatory in that a seat ring is inserted then welded.
2. Integral seat ring can be shaped into seat or welded as in overlay.

 

[mmbguide]

thank you MickMc