Safety Procedures & Regulations Flashcards

A modification to ammonia piping that is not a replacement in kind requires which PSM procedure before it is made?

Answer: Management of Change (MOC)

Any change other than replacement in kind needs a Management of Change review before it is implemented.

Before newly modified ammonia equipment is started up, PSM requires which review?

Answer: Pre-Startup Safety Review (PSSR)

A Pre-Startup Safety Review confirms that construction, procedures, training and the PHA are complete before ammonia is introduced.

Entering a large vessel or pit where ammonia could accumulate requires compliance with which OSHA standard?

Answer: 29 CFR 1910.146

29 CFR 1910.146 covers permit-required confined spaces, including atmospheric testing and attendants.

Following IIAR and industry guidance, how often should relief valves in ammonia service typically be replaced?

Answer: Every 5 years

IIAR recommends replacing pressure relief valves every five years, or sooner if they discharge or show damage.

An operator enters a room where ammonia levels are unknown and may exceed IDLH. What respiratory protection is required?

Answer: Self-contained breathing apparatus (SCBA)

Unknown or IDLH atmospheres require pressure-demand SCBA or a supplied-air respirator with escape SCBA.

Under ASHRAE 15/IIAR 2, where must the emergency shutoff switch for an ammonia machinery room be located?

Answer: Outside the machinery room, next to the principal entrance

The emergency stop must be outside the room, next to the main door, so it can be used without entering a contaminated space.

Which IIAR document gives the labeling standard for identifying ammonia piping, including the contents, physical state, pressure level and flow direction?

Answer: IIAR Bulletin 114 / IIAR 6

IIAR's pipe-marking guidance specifies labels showing abbreviated contents, physical state, pressure level and flow direction.