3.6.3 CETP Instructor PowerPoint Template

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• Personnel who perform tank car unloading
  operations must comply with company operating
  procedures, and be thoroughly familiar with the
  product transfer system.
• In this module you will learn to identify
• Equipment used to transfer liquid by pressure
  differential
• Emergency equipment procedures

3.6.3 Student Book ? 2004 Propane Education Research Council Page 1
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Identifying Equipment Used to Transfer Liquid by
Pressure Differential
3.6.3 Student Book ? 2004 Propane Education Research Council Page 1
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Identifying Equipment Used to Transfer Liquid by
Pressure Differential

• Liquid Transfer Pumps and Vapor Compressors
• Transfer pumps are designed to handle liquid
  propane, while compressors are designed to handle
  vapor. They will be damaged if propane in the
  wrong physical state is supplied to them.

Figure 1. Liquid Transfer Pump
Figure 2. Vapor Compressor
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Identifying Equipment Used to Transfer Liquid by
Pressure Differential

• Flow Controlling Valves and Piping
• If after these efforts any questions remain, or
  you are unable to trace the flow of liquid and
  vapor for the unloading operation, ask the plant
  manager or supervisor forhelp.

Figure 3. Plant Piping(Color code according to
local regulations)
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Identifying Equipment Used to Transfer Liquid by
Pressure Differential
Transfer Hoses and Railcar Risers

• Hose
• Hose couplings
• Hose clamps and fittings
• Connections at bulkhead fittings
• Coupling sealing ring or gasket on the cargo tank
  or male bulkhead coupling (as applicable)

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Identifying Equipment Used to Transfer Liquid by
Pressure Differential
Transfer Hoses and Railcar Risers

• Transfer hoses should be in good condition and
  must not be used if they have any of the
  following defects
• Damage to the hose cover that exposes the
  reinforcement
• Wire braid reinforcement that has been kinked or
  flattened so as to permanently deform the wire
  braid
• Soft spots when not under pressure, bulging under
  pressure, or a loose outer covering
• Damaged, slipping, or excessively worn hose
  couplings
• Loose or missing bolts or fastenings on bolted
  hose coupling assemblies

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Identifying Equipment Used to Transfer Liquid by
Pressure Differential
Figure 4a illustrates how new ACME threads are
machined, and how they become worn over time.
When threads look like tapered pipe threads used
on gas and water piping fittings, the coupling
should be placed
Figure 4a. ACME Coupling Thread Profiles
Figure 4b. Excessive ACME Thread Wear on
Coupling
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Identifying Equipment Used to Transfer Liquid by
Pressure Differential
Figure 5. Tank Car Unloading Riser
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Identifying Emergency Equipment and Procedures

• Check the location and condition of plant fire
  extinguishers.
• Learn the procedures for notifying plant
  personnel of any emergency.
• Operating personnel should be familiar with the
  bulk plants emergency shutdown system,
  including
• Shutdown locations.
• the devices they control.
• how to work the shutdown system, and.
• evacuation routes from the transfer area.

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Identifying Emergency Equipment and Procedures
Figure 6. Tank Car Riser with Emergency Shutoff
Valves
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Identifying Emergency Equipment and Procedures
Figure 7. Cross-Sectional View of Railcar ESV
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Identifying Emergency Equipment and Procedures
Note Railcar risers, remote emergency shut down
stations, transfer hoses and couplings, schedule
80 pipe nipples, emergency shutdown valves
(ESVs), and pneumatic lines that actuate ESVs
should be inspected to ensure that they are in
good working condition. ESVs must never be
disabled.
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Time to See If You Got the Key Points of This
Module

• Complete the Review on page 7.
• See if you are ready for the Certification Exam
  by checking off the performance criteria on page
  8.

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