Half Coupling vs. Reducing Insert
Half Coupling vs. Reducing Insert
(OP)
What, if any, differences are there between socket-welded forged steel HALF COUPLINGS (per ASME B16.11) compared to socket-welded forged steel REDUCING INSERTS (per MSS SP-79)?





RE: Half Coupling vs. Reducing Insert
Apparently HALF-COUPLINGS are used for 90 deg branch connections into larger pipe or vessel walls. It is stonger than a Full-Coupling. However, since the HALF-COUPLING will need to be shaped using a SOCKOLET is a better fitting selection for this application.
Contrariwise, the REDUCING INSERT is used to conveniently make a size reduction in the line.
Thanks anyway. I found my own answer merely moments after I posted.