PERK Flashcards
What is the mitigation strategy for a sheared-off liquid withdrawal valve if it is on top?
Auto-refrigerate → Threaded adapter → Flow-through pipe → Flare
What should be done if a sheared-off liquid withdrawal valve is located at the bottom?
Likely defensive operations (vent, cool, let burn)
How can a leaking vapor recovery valve be mitigated if it has a small leak?
Cap it
What is the mitigation for a large leak from a vapor recovery valve?
Flow-through pipe → Flare
What action can be taken to reseat a stuck open fill valve?
Tap with wooden dowel
If a stuck open fill valve is still leaking after tapping, what should be used?
Piggy-Back Adapter
What to do if a stuck open fill valve is uncontrolled?
Flow-through pipe → Flare
What is the mitigation for a missing spitter (outage indicator)?
Replace with spitter or ¼” NPT plug
What should be determined first for a continuously venting PRD (Pressure Relief Device)?
Determine cause (fire, overfill, failure)
What is the action to take if a tank is overheated due to a continuously venting PRD?
Cool tank
What should be monitored for a continuously venting PRD?
Venting; cannot be capped
What is the mitigation for a sheared-off service valve?
Threaded adapter → Seal or flow-through pipe → Flare
What is the recommended action for a large rust hole in a tank?
Defensive operations (evacuate, disperse vapors, cool exposures)
If able to roll to vapor then roll
If not able and able to patch then patch
Then burn off
What should be done first for a leaking liquid evacuation port?
Tighten first
If a leaking liquid evacuation port is still leaking after tightening, what should be used?
Liquid withdrawal cap or flow-through pipe → Flare
What is the mitigation for a leaking pressure gauge port?
Threaded NPT adapter → Cap or flow-through pipe
What is the mitigation strategy for a leaking forklift cylinder?
Forklift adapter → ACME hose → Flow-through pipe → Flare
What to do if a bent service valve is leaking?
If minor leak → Monitor; if worsening → Flow-through pipe → Flare
What should be done for a leaking ACME fill connection?
Tighten connection
If a leaking ACME fill connection is still leaking after tightening, what should be used?
Piggy-Back Adapter
What is the mitigation for a missing or damaged excess flow valve (EFV)?
Close all valves → Slowly reopen to reset
How should a stuck rotary gauge valve be reseated?
Turn fully clockwise
What should be done if a stuck rotary gauge valve is leaking?
¼” NPT plug
What is the mitigation for an overpressurized tank due to high ambient temperature?
Cool with water fog to reduce pressure
What should be done for a leaking DOT cylinder with a sheared-off valve?
Threaded adapter if possible; if no threads → Vent in safe area
What is the mitigation for a slow leak from a service valve stem?
Tighten packing nut slightly
What should be done for a leaking relief valve on a forklift cylinder?
Cool cylinder; if still venting → Monitor; do not cap
What is the mitigation for a slow leak from an ACME fill valve (old tanks)?
Install ACME cap or Piggy-Back Adapter
What is the action for a slow leak from a fixed liquid level gauge?
Tighten fitting or replace with NPT plug
What should be done for slow flaring with water injection?
Inject water to increase vaporization rate
What PERK fitting is associated with a Vapor Recovery Valve?
Vapor Return Adapter (NB 15) → Flow-Through Pipe (NB 24) → Flare
What is the PERK fitting for a Liquid Withdrawal Valve?
Liquid Unloading Valve (NB 10 or NB 11) → Flow-Through Pipe (NB 23) → Flare
What PERK fitting should be used for a Sheared-Off Service Valve?
Threaded NPT Adapter (NB 27 or NB 28) → Flow-Through Pipe (NB 24)
What is the appropriate PERK fitting for a Stuck Open Fill Valve?
Piggy-Back Adapter (NB 14) → Flow-Through Pipe (NB 24) → Flare
Identify the PERK fitting for a Forklift Cylinder Valve.
Forklift Adapter (NB 21) → ACME Hose → Flow-Through Pipe (NB 24)
What PERK fitting is needed for a Missing Spitter (Outage Indicator)?
Replacement Spitter or ¼” NPT Plug
For an ACME Fill Valve that is leaking, what is the recommended PERK fitting?
Piggy-Back Adapter (NB 14) or ACME Cap
What PERK fitting is used with a Pressure Gauge Port?
Threaded NPT Adapter (NB 27 or NB 28) → Cap or Flow-Through Pipe (NB 24)
What action should be taken for a leaking DOT Cylinder with a sheared-off valve?
Threaded Adapter if threads remain, otherwise monitor venting
What PERK fitting is appropriate for a Liquid Evacuation Port that is leaking?
Liquid Withdrawal Cap or Flow-Through Pipe (NB 24)
What PERK fitting is used for an Overfilled Tank (PRD Venting)?
Leader Hose to direct vapors or monitor venting
What is the recommended PERK fitting for a Bent Service Valve?
Flow-Through Pipe (NB 24) → Flare
What should be done if the Relief Valve on a Forklift Cylinder is leaking?
Cool the cylinder, do not cap
What PERK fitting corresponds to a Sheared-Off POL Valve?
POL Adapter (NB 21) → Flow-Through Pipe (NB 24)
What PERK fitting is needed for a Slow Leak from a Fixed Liquid Level Gauge?
Tighten fitting or replace with NPT Plug
What action should be taken for a Stuck Rotary Gauge Valve on old tanks?
Turn fully clockwise; if leaking, install ¼” NPT Plug
What PERK fitting is recommended for Slow Flaring?
Water Injection Setup
What is the procedure if an Excess Flow Valve (EFV) is activated?
Close all valves → Slowly reopen to reset
DOT Tank – Main Control Valve?
Service Valve
The service valve is critical for controlling the flow of propane from the tank.
DOT Tank – Prevents Overfilling?
OPD (Overfill Prevention Device)
The OPD is a safety feature designed to prevent overfilling during refueling.
DOT Tank – Vapor Outlet?
Service Valve
The service valve also serves as the vapor outlet for the tank.
DOT Tank – Fill Connection?
ACME Fill Port
The ACME fill port is used for connecting to the refueling equipment.
DOT Tank – Pressure Relief?
Pressure Relief Valve (PRV)
The PRV is essential for releasing excess pressure to prevent tank failure.
DOT Tank – Liquid Level Indicator?
Spitter Valve (Outage Gauge)
The spitter valve indicates the liquid level within the tank.
DOT Tank – Excess Flow Protection?
Excess Flow Valve (EFV)
The EFV is designed to shut off the flow of propane in case of a line rupture.
ASME Tank – Main Control Valve?
Service Valve
Similar to DOT tanks, ASME tanks also utilize a service valve for control.
ASME Tank – Vapor Recovery?
Vapor Return Valve
This valve helps recover vapor during the refueling process.
ASME Tank – Liquid Withdrawal?
Liquid Withdrawal Valve
This valve is used to withdraw liquid propane from the tank.
ASME Tank – Pressure Relief?
Spring-Loaded PRD
The spring-loaded pressure relief device helps maintain safe pressure levels.
ASME Tank – Fill Connection?
ACME Fill Port
ASME tanks also use the ACME fill port for refueling.
ASME Tank – Liquid Level Indicator?
Fixed Liquid Level Gauge
This gauge provides a constant reading of the liquid level in the tank.
ASME Tank – Internal Flow Protection?
Excess Flow Valve (EFV)
The EFV is also utilized in ASME tanks for internal flow protection.
Forklift Cylinder – Service & Fill?
Combination Valve
The combination valve serves both functions for forklift cylinders.
Forklift Cylinder – Relief Valve Location?
Integrated in Service Valve
The relief valve is built into the service valve for compactness.
ACME Fill Valve – Purpose?
Tank Refueling
The ACME fill valve is primarily used for refueling the tank.
Vapor Return Valve – Purpose?
Vapor Recovery/Transfer
This valve is crucial for managing vapors during the transfer process.
Spitter Valve – Purpose?
Fill Level Indicator
The spitter valve signals when the tank is full during filling.
PRD – Purpose?
Releases Excess Pressure
The PRD is a safety feature that helps prevent tank overpressure.
