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

[jaguar69]

Hi,

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

 

[KevinNZ]

UG-35.2 Quick-Opening Closures
(a) Definitions
(1) Quick-actuating closures are closures that are operated
by an action that [highlight #FCE94F]releases all holding elements[/highlight].
(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 [highlight #FCE94F]other than[/highlight]
bolted flange joints as described in UG-44(a), 1-6, and
Mandatory Appendix 2, and quick[highlight #FCE94F]-actuating closures as
described in UG-35.2.[/highlight]

Example ??