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Passive Leak Detection. Operation Training October 2014. Regulatory Requirements.

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Presentation Transcript
passive leak detection

Passive Leak Detection

Operation Training

October 2014

regulatory requirements
Regulatory Requirements

“A cargo tank motor vehicle in other than metered delivery service must have a means to automatically shut off the flow of product without the need for human intervention within 20 seconds of an unintentional release caused by a complete separation of a liquid delivery hose (passive shut down capability)”

US code of federal regulations – 49 CFR chapter 173.315 (n) (2)

Transport Canada Regulations – CSA B620

system overview
System Overview

Concept of Passive Leak Detection

MC330-331 tank trailers

Automatically closes valve in the event of a hose separation

Microprocessor based technology

System arms when trailer’s “operating air” is enabled

Continually monitoring pressures

Hose failure causes air valve to exhaust, closing internal valve

mounting locations
Mounting Locations

Typically protected behind trailer landing gear

TEST and RESET buttons should face operator during offloading

probe location
Probe Location

Installed by a US DOT / Transport Canada authorized facility

Mounted in the discharge piping of the trailer

suggested operational process
Suggested Operational Process

Set park brake

Drop the piping guard

Connect the liquid and vapor product hoses to the bulk storage facility

Slowly open the internal valve – charging the pump and trailer piping only

Slowly open the in-line valve at the trailer hose connection charging the delivery hose

process cont
Process cont.

Slowly open the valve to the storage tank

Slowly open the vapor return line from the storage tank – charging the vapor hose (if used)

Slowly open the vapor return tank internal valve into the trailer

Engage the tractor power take off

process cont1
Process cont.

While the system is powered, press and hold the test button – air valve will exhaust, internal valve will close, alarm will sound a “beep, beep, pause, beep, beep, pause” sequence

This test verifies the system is receiving a good probe signal. This sound would be present during a delivery if the probe signal was lost

After releasing the test button, press the reset button again for a complete system reset

*once the trailer system has been tripped, it will be necessary to disengage the PTO and close the trailer / hose valve in order to reopen the internal valve

system maintenance
System Maintenance

Annual checks recommended

Dry air lines

Probe connector and Dielectric grease

Check +12V and GND connections to ensure they are secure and free of corrosion

daily check
Daily Check
  • Energize system
  • Press and hold test button
    • Alarm will BEEP BEEP PAUSE until button is released
    • Air valve will exhaust air going to the internal valve
  • Press RESET to clear test and re-energize internal valve air supply.