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ASME VIII Div 1 UG-35-2 vs UG-35-3

ASME VIII Div 1 UG-35-2 vs UG-35-3

ASME VIII Div 1 UG-35-2 vs UG-35-3


As per ASME VIII Div 1, I can't feel the diference between quick actuating closure (UG-35-2) and quick opening closure (UG-35-3. Can someone give me one example for the both. Thank by advance

RE: ASME VIII Div 1 UG-35-2 vs UG-35-3

UG-35.2 Quick-Opening Closures
(a) Definitions
(1) Quick-actuating closures are closures that are operated
by an action that releases all holding elements.
(2) Holding elements are parts of the closure used to
hold the cover to the vessel, and/or to provide the load
required to seal the closure. Hinge pins or bolts may be
used as holding elements.
(3) Locking elements are parts of the closure that
prevent a reduction in the load on a holding element or
prevent the release of a holding element. Locking elements
may also be used as holding elements.
(4) The locking mechanism or locking device may
consist of a combination of locking elements.

UG-35.3 Quick-Opening Closures
(a) Definitions
(1) Quick-opening closures are closures other than
bolted flange joints as described in UG-44(a), 1-6, and
Mandatory Appendix 2, and quick-actuating closures as
described in UG-35.2.

Example ??

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