2019 Tech Report Jan-Feb

a “spring self-closing flapper cap,”

(Note that “spring self- closing flapper caps” can become inoperable due to corrosion. Inspection, testing and maintenance should be implemented when these are used.)

The “spring self-closing flapper cap” is used on natural gas and tractor exhausts. On the condenser inspecting and maintaining the cap looks to be a challenge.

or a “sock hood cover.” The “sock hood cover,” which is typically bright safety yellow, orange, or red in color, has a light flexible string attached between the hood and the relief pipe stack for its containment if lifted.”

These are commercially available.

RETA TECHNICAL REPORT PAGE 5