A04_0040532962_Offload_Procedure_08_30_2021.pdf
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- Solicitation number
- 140P1522Q0003
About this file
This document provides instructions for offloading liquified natural gas from a transport tanker to fuel storage tanks at a station. It outlines 16 steps for safely connecting the transport tanker, building pressure in the lines, opening valves to purge moisture and begin pumping, monitoring the pump operation, closing valves, disconnecting hoses and removing grounding equipment once offloading is complete.
The related federal contract opportunity is a solicitation from the Department of the Interior National Park Service Intermountain Region to provide fuel station maintenance services for liquified natural gas at Grand Canyon National Park. The solicitation seeks a contractor to perform the offloading procedure and ongoing maintenance of the fuel storage and dispensing equipment to keep the station operational.
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Text version
Offload Mode:
1. Turn off transport.
2. Chock transport wheels.
3. Ground transport tanker to the grounding stud at the offload manifold.
4. Switch to “OFFLOAD” mode at the offload panel.
5. Connect fill hose from the transport tanker to the station Fill Connection.
6. Note tanker pressure. Build pressure 20 psi above noted tanker pressure.
7. Open transport tanker supply valve.
8. Open HCV-13 to purge and clear moisture from the lines. When liquid is detected at
HCV-13, close valve.
9. Open HCV-12
10. Press the “PUMP START” push button.
11. Offload is complete once the tank(s) level reaches 90% full and the pump will automatically stop. If the pump begins to cavitate, this is in indication that the trailer is empty or near empty, press the “STOP” pushbutton.
12. Close HCV-12
13. Disconnect fill hose from fill connection.
14. Switch back to “DISPENSE” mode at the offload panel.
15. Remove ground strap.
16. Remove wheel chalks.
Caution: Do not move transport vehicle until offload is complete and all hoses and ground cables are disconnected.
File details come from the government source that posted it. Updated .