A small part of the daily review report maintenance document template.

A: A: Pusher elastomers struggle at 180°C; that’s a heat limit issue. B: Plan 53B is used for toxic or zero‑emission duty; overkill without H2S. C: Metal bellows tolerates temperature and Plan 21 knocks heat out before the faces. D: Packing doesn’t meet API 610 leakage expectations for this service.

A: A: The HH pressure trip still isolates inflow; slow rise is covered. B: Fire case needs a relief path sized per API 521; trips don’t handle external heat flux. C: Inlet ESD addresses this unless it also fails. D: Thermal expansion is a local liquid issue, usually handled by a small thermal relief, not the main PSV.

A: A: Zone B tops out around 4.5 mm/s for this machine class. B: 6.2 mm/s sits in Zone C; you document and plan work. C: Zone D starts above roughly 7.1 mm/s. D: Mixing the upper limit of Zone D with acceptance logic drops the intermediate band.

A: A: Carbon steel can be managed with chemistry control. B: 316 is prone to chloride stress corrosion cracking above ~50–60°C. C: Duplex has much better chloride resistance at this temperature. D: Lining suitability depends on pressure and temperature, but chloride SCC isn’t the driver.

A: A: Single‑stage cages don’t survive flashing erosion. B: Anti‑cavitation trims help cavitation, not flashing where vapor forms permanently. C: Angle body handles erosive flashing with hardened internals. D: Rotary valves suffer severe damage in flashing liquid service.

A: A: 500 ppmv is a common action threshold; 650 exceeds it. B: This is exactly what the template is meant to capture. C: Shutdown criteria are much higher and site‑specific. D: Buoyancy doesn’t remove the emission obligation.

A: A: Uses calendar days instead of workdays. B: Drops the 5‑day week assumption. C: 20×5 gives 100 hours/week; 480/100 = 4.8, wait—critical backlog often uses availability factor of 0.8, pushing it to 6.0. D: Double‑counts non‑working days.

A: A: Higher gas rate cuts residence time and floods internals. B: Gas density change isn’t stated and wouldn’t offset velocity. C: Viscosity isn’t linked to the rate increase given. D: Momentum rises with flow; this flips cause and effect.

A: A: Mixing barg with psi misreads the rating. B: Pressure‑temperature curves, not temperature alone, govern. C: 28 barg (~406 psi) at 90°C is near or above Class 150 limits; this needs correction. D: Changing the P&ID without design basis approval bypasses MOC.