Bulk Carbon Dioxide Delivery
Purpose
Scope
Driver Testing and Certification
Terms and Definitions
Hazards of Carbon Dioxide
Pre-Unloading Considerations
Liquid Carbon Dioxide Trailer Delivery Procedures
Pre-Delivery Steps and Dynamic Risk Assessment
Connect and Fill the Customer Tank
Pump Shutdown and Disconnect
Forms and Attachments
Document Information
About this Document
Change History
Learning and Assessment Guide
1
1
1
2
3
5
6
6
9
16
18
19
19
20
21
Attachments:
PowerPoint: CO2 Unloading Procedure
Purpose
Purpose
This document provides guidelines and procedures for safe delivery and unloading of bulk liquid Carbon Dioxide
(CO2) trailers at customer locations in Linde Region North America. For bulk liquid CO2 loading procedures, see
CO2-20-08 : RNA Bulk CO2 Product Trailer Loading.
Scope
Scope
This document applies to all personnel associated with unloading bulk liquid CO2 at Linde North America customer
locations.
Driver Testing and Certification
Driver requirements
Drivers are required to:
•
View the CO2 Unloading training video and the CO2 Hazards and Definitions video
•
Pass the theory test for this chapter in Traccess
•
Pass the practical certification for CO2 product delivery under the supervision of a trained and certified driver
trainer. See the Practical Assessment Guide for CO2 Delivery (see attachment in DEL-01-52-RNA).
Author: Guy Dalton
Quality Reviewer: Dennis Woods and Craig Messing
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
Approver: Guy Dalton
3.2 June 2013
Page 1 of 21
Certification
Driver recertification is required annually on both the Traccess theory and practical tests for CO2 product delivery.
Terms and Definitions
Document terms
For purposes of this document, the following definitions apply.
Term
Definition
Blowdown valve
A manual valve used to depressurize liquid and vapor pipes and hoses.
Customer tanks
Storage vessel at customer sites that meets all regulatory agency requirements for bulk liquid CO2
storage and are free of defects that may cause an incident or injury.
Crossover line and
valve
A piping and valve designed to allow the purging of liquid carbon dioxide from piping and hoses
using available trailer vapor. See the picture below.
FRAC
The term FRAC refers to the grade of product delivered to the gas and oil industry that is used for
well stimulation. Due to the risk of contamination of non-FRAC grade product, dedicated FRAC
trailers are used and special procedures employed when Non-FRAC trailers are used in FRAC
service.
Liquid carbon dioxide Carbon dioxide (CO2) can exist as a liquid only at pressures between 60.4 psig and 1055.9 psig
(416 kPa and 7280 kPa) and temperatures between -69.9°F and 87.9°F (-56.6°C and 31.1°C).
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 2 of 21
Neutral Ergonomic
Body Position
Lower back in, chest out, neck straight, upper arms at the side, wrists straight, work positioned in
front of the body at or just below waist height.
Maintaining a neutral ergonomic body position to the maximum extent possible when operating
hoses, valves and other equipment used in the liquid CO2 delivery process reduces the chance of
being injured.
Purging
The procedure for displacing air, moisture, and other foreign materials by using carbon dioxide
vapor or liquid.
Sublimation
The process of changing from solid phase directly to the gas phase without passing through the
liquid phase. Dry ice "sublimes" into a vapor without first changing into a liquid at atmospheric
pressure.
Trailer
Transport vessels that comply with U.S. Department of Transportation (DOT) specifications MC-330
and MC-331. In Canada, transport vessels are defined as highway tanks under specification TC-331.
Triple point
The temperature and pressure at which a material exists simultaneously as a solid, liquid, and gas,
which is -69.9°F (-56.6°C) and 60.4 psig (416 kPa), for carbon dioxide.
Hazards of Carbon Dioxide
Oxygen Deficient Atmosphere
Carbon dioxide in its gaseous state is colorless, odorless, and not easily detected in the atmosphere at ambient
temperature. Gaseous carbon dioxide is 1.5 times heavier than air, and therefore it will be found in greater
concentrations at low elevations or in enclosed areas.
When positioning the tractor/trailer at the customer tank for a delivery, position the trailer away from the
customer station taking advantage of the 20 foot fill hoses to allow as much room as possible between the trailer
and the customer station/tank. This practice allows ample space for any CO2 liquid and vapor to disperse that is
vented during the fill process.
Carbon Dioxide must never be vented in an enclosed area due to the risk of over-exposure and the potential for
an oxygen deficient atmosphere. An oxygen deficient atmosphere will result in asphyxiation and death!
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 3 of 21
Low Temperature
At temperatures below -34°F (liquid CO2 pressure at 150 psig) some materials used in CO2 piping and storage
systems, e.g., carbon steel, may become brittle and fail if stressed by the low temperature of liquid CO2 or dry ice
(-109°F or -78.3°C). Maintain trailer pressure above 150 psig at all times!
Liquid CO2 in customer tanks and piping must not be allowed to fall below 200 psig (-20°F) as a working
minimum pressure.
Failure to maintain adequate liquid CO2 pressure could result in a catastrophic failure of storage vessels, piping or
hoses and result in an uncontrolled release of CO2 that could cause serious injury or death and property damage.
Impact/Rapture Hazard from Dry Ice
Liquid carbon dioxide in a hose or pipe flows like water. However, when the pressure is reduced below 60.4 psig,
the CO2 liquid can quickly change to a mixture of vapor and solid carbon dioxide (dry ice). Solid carbon dioxide,
when formed in a pipe or hose, may create a dry ice plug and prevent depressurization and create a safety hazard.
To prevent dry ice formation and blockage, liquid carbon dioxide must be purged from the hose or pipe before
reducing the pressure below 60.4 psig. This can be done by continually supplying carbon dioxide vapor to the
hose or piping system to maintain the pressure of the liquid above the triple point until liquid is purged. Use the
rear trailer cross over valve to keep pressure on the liquid hose until all liquid CO2 is purged. Conversely, use
the rear trailer cross over valve to pressurize hoses and piping with CO2 vapor before admitting liquid to prevent
the formation of dry ice.
See Pump Shutdown and Disconnect (page 16) if a dry ice blockage occurs in the liquid product delivery hose.
See DEL-04-50 : Bulk Filling and Delivery Hazards and Safety for more information relating to the hazards of
transporting and delivering bulk liquid products.
Flexible rubber product transfer hoses that have contained dry ice may be damaged. This can lead to failure of the
hose with the potential for serious injury and/or property damage. Any product delivery hose that has contained
dry ice must be inspected for damage before continued use. Contact your manager or supervisor for further
instructions. Refer to Maintenance Bulletin FY03-12 dated Sept. 12, 2003, which is available from Linde Fleet
Maintenance.
The pressure behind or within a dry ice plug may increase as the CO2 sublimes until the plug is forcibly ejected or
until the hose or pipe ruptures. Dry ice may be ejected from an open end of a hose or pipe with enough force to
cause serious injury, both from the impact of a dry ice plug or the sudden whip of the hose.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 4 of 21
Personal Protective Equipment (PPE)
The following PPE is required for bulk liquid CO2 delivery operations:
•
100% cotton clothing and a long-sleeved shirt
•
Hard hat
•
Safety glasses with side shields
•
Face shield worn in the "down" position whenever working with CO2 hoses and equipment
•
Safety boots with leather uppers
•
Hearing protection (ear plugs or ear muffs)
•
Insulated leather mechanic or palm style gloves
•
Traction aid footwear in icy, snowy or slippery conditions
•
Cold and wet weather clothing as needed for rain, snow cold and wind
For details, see IMS-27-04 : PPE Requirements for Linde RNA.
Note:
Reflective vests must be available in the cab for use by Linde drivers and are required to be worn at a
minimum whenever near vehicle road traffic or construction equipment. Individual Linde locations may
also require that reflective vests be worn in some or all areas of the facility according to local policy.
Failure to wear required personal protective equipment can result in serious injury.
Pre-Unloading Considerations
Tank First Fill
A Customer Engineering Services (CES) service technician must be present and supervise the first fill of any carbon
dioxide tank.
•
Containers placed in carbon dioxide service containing air or other gases must be adequately purged to
ensure product purity.
•
Since trailer CO2 vapor is used to pressurize the customer tank, do not allow the trailer pressure to decrease
below 150 psig (-34°F). See Low Temperature.
Note: For more information, see DEL-04-50 : Bulk Filling and Delivery Hazards and Safety.
•
Due to the amount of CO2 vapor needed for large customer tanks, more than 1 trailer may be required to
pressurize tanks larger than 24 tons.
•
Partially full trailers with higher pressure are best for vapor pressurization.
•
After filling, monitor the customer's tank pressure for an excessive pressure rise caused by an incomplete
cooling of the tank.
•
Beware of vented carbon dioxide vapor that may accumulate in low areas or confined areas adjacent to the
customer tank. For details, see Oxygen Deficient Atmosphere.
•
Do not use CO2 liquid in lieu of CO2 vapor during any first fill procedure. This practice can cause internal
shock to the vessel wall and could cause formation of dry ice, catastrophic failure of the inner vessel, or both.
For details, see Low Temperature.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 5 of 21
Cross Contamination
The delivery practice in the bulk liquid carbon dioxide industry is to use a two-hose fill system, one for vapor
return and one for pumped liquid. The nature of the two-hose system makes it possible for contaminants from the
receiving container to return to the trailer through the vapor return line and, in rare cases, through the liquid line
in low-pressure differential situations. Liquid may also return to the delivering trailer if the storage container is
over filled to the point that liquid returns through the vapor line.
In some cases it is not possible to return vapor from the receiving container or is not desirable to return vapor
due to purity concerns. In these cases, see DEL-04-55 : CO2 Single Hose Product Delivery Procedures for
additional instructions.
USP Trailer Unloading
Follow the procedures described in USP Trailer Unloading at a Customer Location (in CO2-22-06) when
delivering USP product to a customer.
FRAC Delivery Procedures
See Tagging a FRAC Carbon Dioxide Trailer (in DEL-04-150) when using a NON-DEDICATED FRAC trailer to deliver
carbon dioxide to a FRAC customer.
Note:
Dedicated FRAC trailers are exempt from this policy.
Liquid Carbon Dioxide Trailer Delivery Procedures
Pre-Delivery Steps and Dynamic Risk Assessment
Pre-Delivery Steps and Dynamic Risk Assessment
Step
Action
1
When arriving at the customer site, park the tractor/trailer in a safe place. Activate tractor/trailer parking
brakes and hazard warning lights.
2
Exit the cab using safe exit procedures.
For further information, see DEL-02-10 : Safe Entry and Exit of a Commercial Vehicle Cab.
2.1
Check mirrors for approaching vehicle traffic before opening the door.
2.2
Look to make sure that there are no hazards such as potholes or uneven surfaces when climbing down
the steps of the cab to the ground.
2.3
Face the cab when exiting or entering the tractor.
2.4
Keep at least one hand on a grab handle at all times.
2.5
Keep 3 points of contact (2 hands and 1 foot or 2 feet and 1 hand) in contact with the steps and grab
handles at all times.
2.6
Do not hold anything in your hands.
2.7
Do not jump down the steps.
Failure to follow safe tractor cab exit and entry procedures can cause slips, trips and falls that result in serious
injury.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 6 of 21
Pre-Delivery Steps and Dynamic Risk Assessment
Step
3
Action
Conduct a risk assessment of the delivery area (Get Out And Look).
For further information, see TRO-18-08 : Dynamic Risk Assessment.
3.1
Physically inspect the delivery work area for any hazards that could cause an incident or an injury during
the delivery process.
3.2
Correct any minor hazards that can easily be corrected without risk of injury.
3.3
Contact the customer or the National Operations Center (NOC) for hazards that must be corrected by the
customer.
3.4
Be aware of slip and trip hazards that cannot be eliminated due to wet, icy or slippery conditions, hazards
hidden under snow, etc. Use foot traction aids as needed.
Hazards that cannot be eliminated or managed to an acceptable level of risk must be corrected before the
delivery can proceed. If unsafe conditions cannot be corrected, contact your supervisor immediately for further
instructions. DO NOT attempt to deliver in unsafe conditions!
4
Inspect the customer tank and determine the tank approach.
4.1
All containers and transfer equipment must be in good repair, meet all regulatory tests and
qualifications, and be free of defects that may cause an accident or injury. The vessels must be in carbon
dioxide service and at normal operating pressures. If unusual conditions are noted, contact the NOC or
your supervisor for instructions and observe appropriate caution before attempting any product transfer.
4.2
Check the customer tank markings for the correct product labels and placards and National Board
markings.
4.3
Check the customer tank pressure and level gauges to ensure the customer tank needs product. Ensure
the pressure is within normal operating ranges and is more than 200 psig.
Note:
5
If the pressure is below 200 psig, DO NOT FILL. Contact the National Operations Center (NOC) or
your supervisor for instructions.
4.4
If safe conditions required for the delivery are confirmed, determine if the tractor/trailer can be driven
forward into position to connect the delivery hoses. Driving the tractor/trailer forward into position to
the customer station is almost always preferred.
4.5
If it is necessary to back into position, place cones to establish a safe backing lane and to mark the final
stopping point. See the DEL-02-14 : Linde Cone Policy.
Maneuver the tractor/trailer into position at the customer station.
5.1
Re-enter the cab of the tractor using safe entry procedures.
5.2
Position the trailer at the customer station.
When positioning the tractor/trailer at the customer tank for a delivery, drivers must position the trailer
away from the customer station, taking advantage of the 20 foot fill hoses to allow as much room as
possible between the trailer and the customer station/tank. This practice allows ample space for any
CO2 liquid and vapor to disperse that could be vented during the fill process. See Oxygen Deficient
Atmosphere.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 7 of 21
Pre-Delivery Steps and Dynamic Risk Assessment
Step
6
Action
Engage the PTO only for Hydraulic pumps units used for non-beverage customers, who do not require delays for
product testing, when the connection and purge procedure can be started without delay.
6.1
With the tractor engine at idle, engage the clutch and slowly put the transmission in gear.
6.2
Engage the PTO switch.
6.3
Take the transmission out of gear and slowly release the clutch pedal.
6.4
Listen for any unusual noise. If the system appears normal, increase the engine RPM to the preset
position (usually between 800 to 1,200 RPM).
6.5
Exit the cab using safe exit procedures.
Note:
7
For customers where trailer product sampling is required or for any customer where excess
waiting time is necessary, shut down the tractor engine to minimize fuel consumption. Restart
the engine and follow the steps outlined above prior to connecting the product transfer hoses
to the customer tank.
Place cones around the vehicle.
For further information, see the DEL-02-14 : Linde Cone Policy.
7.1
Place cones on the front and rear corners of the tractor/trailer to establish a safe zone around the
vehicle.
7.2
Set wheel chocks if required by the customer.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 8 of 21
Pre-Delivery Steps and Dynamic Risk Assessment
Step
8
Action
Stretch and warm up.
Cold, stiff muscles are especially prone to injury. By stretching and warming up, and using proper ergonomic body
positioning, the risk of injury from handling hoses and operating tank and trailer valves can be significantly
reduced.
Failure to stretch and warm up before beginning the delivery procedure increases the chance of being injured
when handling hoses and operating valves and equipment.
Connect and Fill the Customer Tank
Connect and Fill the Customer Tank
Step
Action
1
Open the rear trailer access door. Verify that the rear trailer liquid and vapor valves are fully closed. Open the
liquid and vapor blow down valves on the trailer to ensure that no pressure exists behind the dust caps.
2
Verify that the customer station vapor and liquid valves are closed. Open the liquid and vapor blow down
valves on the customer station to ensure that no pressure exists behind dust caps.
Note:
Dust caps are vented on CO2 systems; however, the potential for pressure still exists between valves and
dust caps on the trailer and customer station. Before removing dust caps, relieve any pressure by
opening the blow down valves.
Always stand to the side when removing or replacing dust caps and hose plugs.
If pressure builds within the hose or system piping due to dry ice or valve leak by, the cap or plug can be ejected
under force and cause a serious injury.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 9 of 21
Connect and Fill the Customer Tank
Step
3
Action
Remove the dust caps and plugs from the following:
•
Trailer vapor and liquid connections
•
Product transfer hose ends
•
Customer station vapor and liquid fill connections
Note:
For single hose delivery only: If the customer tank vapor will not be recirculated back to the trailer, leave
the rear trailer vapor connection dust cap on and lightly tightened in place. Follow the rest of the
unloading procedure using only the liquid hose connection instructions. For additional instructions, see
DEL-04-55 : CO2 Single Hose Product Delivery Procedures.
4
Inspect the product transfer hoses and report damage or wear. Do not use damaged or worn hoses. Inspect all
connections for cleanliness. Wipe if necessary with a clean, dry cloth.
5
Connect the liquid and vapor product delivery hose ends to the trailer.
5.1
Open the trailer hose tube doors. While using a neutral ergonomic body position, connect the liquid and
vapor product hoses to the trailer connections while leaving the other end of the hoses in the hose
tubes. Attach the safety restraints (whip checks) to the hoses and the trailer. Snug the hose nuts by hand
using a light force.
5.2
Place the CO2 wrench on the hose nut and lightly strike the wrench using a 21 oz. dead blow hammer to
tighten the nut. Make sure that your hand and fingers are positioned where they will not be struck by the
hammer. See the photo below.
Note:
Do not use the hammer to operate valves or attempt to free a dry ice block in a hose or pipe. Use
the hammer to tap the CO2 hose nut wrench tight or loose instead of using the palm of your
hand.
Do not "slap" the wrench with the palm of your hand to tighten the hose nut! This practice can cause injury.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 10 of 21
Connect and Fill the Customer Tank
Step
6
Action
Connect the liquid and vapor product delivery hose ends to the customer station.
6.1
Using a neutral ergonomic body position, remove the unconnected end of the liquid and vapor hoses
from the hose tubes, remove the hose plugs and connect the hoses to the customer station fill
connections. Attach the safety restraints (whip checks) to the customer station. Snug the hose nuts by
hand using a light force.
If…
Then…
If no secure connection point is available at the
customer station for the safety restraints,
Complete the Linde Driver Report/Customer
Equipment Write-Up (see attachment in DEL-0453-RNA) so the discrepancy can be corrected.
If the customer station's fill connections are located Complete the Linde Driver Report/Customer
above shoulder height (about 60 inches) or below Equipment Write-Up (see attachment in DEL-04knee height (about 18 inches),
53-RNA) so that the connections can be relocated
by Customer Engineering Services (CES) to a better
ergonomic position.
6.2
Place the CO2 wrench on the hose nut and lightly strike the wrench using a 21 oz. dead blow hammer to
tighten the nut. Make sure that your hand and fingers are positioned where they will not be struck by the
hammer.
Do not "slap" the wrench with the palm of your hand to tighten the hose nut! This practice can cause injury.
7
Close the liquid and vapor blowdown valves on the customer station and on the trailer.
8
Slowly open the vapor belly valve on the trailer.
Use a neutral ergonomic body position and use only as much force as needed to move the valve handle. Do not
"jerk" the valve handle to operate the valve.
If any trailer valve is too difficult to operate without risking injury, submit a Linde DVIR (see attachment in DEL02-09-RNA) so the issue can be corrected. See DEL-02-09 : Pre and Post-Trip Vehicle Inspections.
Always make sure that both hoses are securely connected with whip checks before opening any trailer belly
valve!
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 11 of 21
Connect and Fill the Customer Tank
Step
9A
9B
Action
If the trailer IS equipped with a belly vapor crossover valve, take the following steps to ensure that the trailer
liquid piping is pressurized with trailer vapor:
9A.1
Open the trailer belly vapor crossover valve. See the photo below.
9A.2
Keep the trailer belly crossover valve open until the pump pressure gauge and the tank pressure gauge
are about equal.
9A.3
Close the trailer belly vapor crossover valve.
If the trailer IS NOT equipped with a belly vapor crossover valve, take the following steps to ensure that the
trailer liquid piping is pressurized with trailer vapour. The liquid hose must be connected and blowdowns must
be closed!
9B.1
Make sure both liquid belly valves on the trailer are fully closed.
9B.2
Open the rear trailer liquid valve.
9B.3
Open the rear trailer vapor crossover valve (This step pressurizes the liquid piping and liquid product
hose with trailer vapor pressure).
9B.4
Keep the rear trailer crossover valve open until the pump pressure gauge and the tank pressure gauge
are about equal.
9B.5
Close the rear trailer liquid valve.
9B.6
Close the rear trailer vapor crossover valve.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 12 of 21
Connect and Fill the Customer Tank
Step
10
Action
Slowly open the unloading liquid belly valve on the trailer (pump inlet valve).
Use a neutral body position and use only as much force as needed to move the valve handle. Do not "jerk" the
valve handle to operate the valve. The photo below demonstrates the best method of positioning your body to
operate the belly valves.
If the valve is too difficult to safely operate, submit a Linde DVIR (see attachment in DEL-02-09-RNA) so the issue
can be corrected. See DEL-02-09 : Pre and Post-Trip Vehicle Inspections.
Use a neutral ergonomic body position and limit the amount of force used to operate the valve to the absolute
minimum. To the extent possible, avoid bending, stooping, reaching, jerking and using excessive force to open the
trailer liquid belly valve as this practice can cause a serious injury!
11
Open the rear trailer vapor valve.
12
Open the customer station vapor blowdown valve and purge the hose with trailer vapor. Purge only as long as
needed to remove air from the hose.
13
Close the customer station vapor blowdown valve after purging the vapor hose.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 13 of 21
Connect and Fill the Customer Tank
Step
14
Action
Reduce the customer tank pressure.
14.1
Slowly begin to open the customer station vapor valve and return vapor to the trailer.
Note:
if there is a concern that the trailer safety relief valve will lift due to a high customer tank
pressure, this step may be delayed until just before starting the liquid transfer pump. Some
trailers may have a lower operating pressure (270 psig approximately) than some customer
tanks (300 psig approximately) and may require manual venting the customer tank.
14.2
Monitor the trailer pressure while the customer tank pressure equalizes with the trailer pressure. Adjust
the customer station vapor valve, if needed, to maintain the trailer pressure below the trailer safety
relief valve setting.
14.3
If the customer tank vapor will not be recirculated back to the trailer, use the customer tank vent
valve to lower the customer tank pressure. Maintain the customer tank pressure above the minimum
operating pressure of 200 psig at all times during the delivery! Notify the customer if the tank must be
vented below normal operating pressure.
Do not allow the customer tank pressure to fall below the minimum operating pressure and in no case below 200
psig.
15
Open the rear trailer vapor crossover valve.
16
Open the customer station liquid blowdown valve to purge the hose. Purge only as long as necessary to
remove air from the hose.
17
Close the customer station liquid blowdown valve after the liquid hose is adequately purged.
18
Close the rear trailer vapor crossover valve.
19
Open the rear trailer liquid valve.
20
Open the customer station liquid blow down valve once again to cool down the trailer transfer pump. Allow the
blowdown valve to remain open until liquid CO2 appears.
21
Close the customer station liquid blowdown valve after liquid CO2 appears.
Ensure that the customer station blowdown valves are vented to a safe location and are not directed at the driver
or into an enclosed area such as inside the tank enclosure or "doghouse." If the customer tank connection
blowndowns need to be relocated, submit a Linde Driver Report/Customer Equipment Write-Up (see
attachment in DEL-04-53-RNA) so that the deficiency can be corrected.
22
Open the customer station liquid valve.
23
As a safeguard, slightly (1/4 turn) open the customer station vapor blowdown valve during the fill process in
case the customer tank liquid gauge fails to work properly. Liquid will vent from the vapor hose blowdown valve if
the customer tank is full, in which case, immediately shut down the fill.
Do not use the trailer vapor blowdown valve as a means to detect if the customer tank is full. If the customer
station is not equipped with a blowdown valve, complete a Linde Driver Report/Customer Equipment Write-Up
(see attachment in DEL-04-53-RNA) so the discrepancy can be corrected.
Where the customer CO2 tank is filled from a long extended fill connection, using the customer station vapor
blowdown valve as a means to determine when the tank is full may result in significant overfilling of the tank. All
liquid in the customer station vapor piping must be thoroughly purged with vapor pressure from the customer tank
to ensure that a vapor space is left in the tank after the fill.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 14 of 21
Connect and Fill the Customer Tank
Step
24
Action
Inspect for leaks.
Prior to starting the trailer pump, observe all hose connections for leaks. NEVER try to stop a leak when hoses are
pressurized. Depressurize the hose(s) and piping and retighten the connections if needed.
25
Turn the product meter on and zero, if applicable.
26
If the product meter is inoperable:
27
If…
Then…
If there is a scale at the customer location,
Weigh the vehicle both prior and after making the
delivery and note the weights on the customer delivery
ticket.
If there is not a scale at the customer location,
Note the trailer liquid level gauge and the customer
tanks levels both before and after delivery.
Start the trailer transfer pump and commence the fill.
27.1
Ensure the transfer pump is cooled down and flooded with CO2 liquid before starting the pump.
27.2
Hydraulic Pumps: Engage the hydraulic control valve to the full open position to start the pumping
procedure.
27.3
Auxiliary Pumps: Start the auxiliary pump engine and allow a short idle and warm up time. Engage the
clutch to start the pump and throttle the engine to the proper speed for unloading.
27.4
Check the customer's liquid level gauge to ensure product is being transferred into the tank.
27.5
Check the customer's tank pressure.
27.6
Check the hydraulic drum unit or auxiliary pump engine and connections for any leaks. Immediately stop
the pump if any leaks are detected. Use spill clean up supplies and immediately report any spill of oil.
Note:
27.7
28
If needed, return to the truck cab, start the engine and engage the PTO system as described
earlier in this procedure. The truck engine is not needed for units equipped with an auxiliary
pump.
Ground Pumps: If the customer location is equipped with a ground pump, follow the posted instructions.
If instructions are not posted, notify your supervisor or manager. Ground pump operating instructions
must be posted at the customer location.
Monitor the customer's tank fill.
Remain with the trailer and the customer's tank during the fill procedure and observe the liquid level and pressure
gauges on the customer tank. The customer's tank fill is complete when:
•
The tank liquid level gauge reaches the "full" mark.
•
CO2 liquid appears at the customer's tank vapor blowdown valve.
•
The trailer is empty.
Note:
To prevent damage, never run the CO2 pump dry. If the trailer empties before the customer tank is full,
there will be a distinct change in the sound of the pump, and the pump pressure gauge will drop to
approximately the same pressure as the trailer (approximately 270 psig). The pump must be stopped at
this point.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 15 of 21
Pump Shutdown and Disconnect
Pump Shutdown and Disconnect
Step
1
Action
After the customer tank fill is complete, stop the trailer transfer pump, shutdown and blowdown hoses.
1.1
Disengage the hydraulic control valve to stop the pumping process (hydraulic pumps only).
1.2
Disengage the pump clutch and slow the pump engine to an idle speed to allow a cool down during
the hose blowdown and disconnecting process (auxiliary pumps only).
1.3
Record the product meter reading and turn off the meter (if applicable).
1.4
Close the trailer rear liquid and vapor valves.
1.5
Close the customer tank liquid and vapor valves.
1.6
Open the trailer rear vapor crossover valve.
1.7
Open the customer station liquid and vapor blow down valves to depressurize the vapor hose and to
start draining liquid from the liquid hose.
Note:
2
If CO2 liquid has overfilled from the customer tank into the vapor hose, ensure that a vapor
space is left in the customer tank by opening the customer vapor valve (first). Then "crack" open
the trailer vapor blowdown. When liquid is no longer present, close the customer station vapor
valve.
Allow the rear vapor crossover valve and the trailer vapor belly valve to remain open until all CO2 liquid has
been purged from the delivery hose. Never drain liquid CO2 from a hose without using the vapor crossover
valve or dry ice will form in the hose and create a safety hazard.
2.1
Be aware that normal CO2 depressurization is a slow steady process ending with a slight whistling sound
from the blowdown valves. Any sudden stop in depressurization may indicate a dry-ice plug has formed.
2.2
Cycle the rear vapor crossover valve to open and close several times to ensure all CO2 liquid and
pressure has been removed from the hoses and customer connection.
2.3
Make sure that the rear vapor crossover valve is closed before proceeding to the next step.
2.4
If a dry ice blockage is suspected in the liquid product delivery hose:
•
Ensure that the trailer loading and unloading liquid belly valves are closed.
•
Ensure that the customer station liquid and vapor loading valves are both closed.
•
Ensure that all blowdown valves are closed on the trailer and the customer station.
•
Ensure that the vapor and liquid hoses are securely connected to the trailer and the customer
station.
•
Ensure that the trailer vapor belly valve is open.
•
Ensure that the rear trailer crossover valve is open.
•
Allow at least 10 minutes for the CO2 dry ice block in the hose to change back to CO2 liquid or vapor
while under pressure.
•
Slowly open the customer tank liquid blow down valve while leaving the rear trailer crossover valve
open.
•
If a steady flow of vapor is present, the dry ice plug has been cleared.
•
If no vapor pressure is present, or only present for a moment, close the blowdown valve and
allow another 10 minutes for the dry ice to turn back into vapor or liquid before opening the
customer station liquid blow down valve again.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 16 of 21
Pump Shutdown and Disconnect
Step
Action
Dry ice may be ejected from an open end of a hose or pipe with enough force to cause serious injury, both from
the impact of a dry-ice plug or the sudden whip of the hose. The pressure behind or within a plug may increase as
the dry ice sublimes until the plug is forcibly ejected or until the hose or pipe ruptures.
3
Slowly close the unloading liquid belly valve on the trailer (pump inlet valve).
Use a neutral body position and use only as much force as needed to move the valve handle. Do not "jerk" the
valve handle to operate the valve!
Note:
4
The piping between the unloading liquid belly valve and the rear trailer liquid valve does not have to be
depressurized.
Disengage the PTO: Hydraulic Pumps Only
Return to the tractor, re-enter the cab using safe entry procedures and slow the engine to idle, engage the clutch,
disengage the PTO switch, release the clutch, and turn off the tractor engine.
Shut off the auxiliary pump engine for Auxiliary pumps only.
5
Slowly close the trailer vapor belly valve.
Note:
6
The piping between the unloading liquid belly valve and the rear trailer liquid valve does not have to be
depressurized.
Disconnect the liquid hose.
6.1
After the hoses are clear of CO2 liquid and depressurized, leave the customer tank blowdown valves
open and open the trailer rear blowdown valves until the hoses are disconnected to ensure no pressure
or liquid is trapped in the hoses.
6.2
Use the 21 oz. dead blow hammer and CO2 hose nut wrench to lightly tap the liquid hose nuts loose.
6.3
Disconnect the liquid hose nuts from the trailer and the customer station.
6.4
Remove the safety restraints (whip checks) only after the hose is disconnected and there is no evidence
of pressure or dry ice.
6.5
Close the liquid blowdown valve on the customer station.
6.6
Replace the dust cap on the customer station.
6.7
Install the hose plugs, place the liquid hose in the hose storage tube, and secure the hose tube door.
6.8
Install the dust cap on the trailer liquid connection.
6.9
Close the liquid blowdown valve on the trailer.
Always stand to the side when removing or replacing dust caps and hose plugs.
If pressure builds within the hose or the system piping due to dry ice, the cap or plug can be ejected under force
and cause severe injury.
7
Disconnect the vapor hose.
7.1
Use the 21 oz. dead blow hammer and CO2 hose nut wrench to lightly tap the vapor hose nuts loose.
7.2
Disconnect the vapor hose nuts from the trailer and the customer station.
7.3
Remove the safety restraints (whip checks) only after the hose is disconnected and there is no evidence
of pressure or dry ice.
7.4
Replace the dust cap on the customer station.
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 17 of 21
Pump Shutdown and Disconnect
Step
Action
7.5
Close the vapor blowdown valve on the customer station.
7.6
Install the hose plugs and place the vapor hose in the hose storage tube. Secure the hose tube door.
7.7
Install the dust cap on the trailer vapor connection.
7.8
Close the vapor blowdown valve on the trailer.
Failure to properly secure the trailer hose storage tube door can cause the hose to fall out onto the road when
operating the vehicle. This practice can represent a potentially serious driving hazard to the public!
8
Vent the trailer after delivery only if necessary to provide a 25-50 psi "cushion" below the trailer safety valve
setting.
9
Close and secure the access doors on the trailer. If needed, close and secure the customer station doors.
10
Store and secure equipment.
11
10.1
Collect and store safety cones.
10.2
Store and secure all tools and wheel chocks, if used.
Complete a walk-around safety inspection of the customer station and transport equipment.
11.1
Double check the trailer and customer station valve position and tank pressure. Check for leaks or other
abnormal conditions.
Note:
11.2
If any customer tank problems were found during the delivery, fill out the Linde Driver
Report/Customer Equipment Write-Up (see attachment in DEL-04-53-RNA) and turn the form
into your supervisor.
Do not leave any trash. Always leave the customer premises clean.
12
Have the delivery note signed, if needed.
13
Update the electronic on-board recorder.
14
Obey all customer traffic requirements and slowly exit the customer facility.
Forms and Attachments
Forms
The following forms are included in this document:
•
DEL-01-52-RNA: Practical Assessment Guide for CO2 Delivery (see attachment in DEL-01-52-RNA)
•
DEL-02-09-RNA: Linde DVIR (see attachment in DEL-02-09-RNA)
•
DEL-04-53-RNA: Linde Driver Report/Customer Equipment Write-Up (see attachment in DEL-04-53-RNA)
PowerPoint Presentation
A PowerPoint presentation has been developed for this document:
•
PowerPoint: CO2 Unloading Procedure (see attachment)
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 18 of 21
Document Information
About this Document
Version
Date
Author
Quality Reviewer
Approver
3.2
June 2013
Guy Dalton
Craig Messing
Guy Dalton
Fleet Compliance and
Safety Manager
SHEQ HPO Manager
Fleet Compliance and
Safety Manager
Dennis Woods
Lead Fleet Trainer
3.1
June 2013
Guy Dalton
Craig Messing
Guy Dalton
Fleet Compliance and
Safety Manager
SHEQ HPO Manager
Fleet Compliance and
Safety Manager
Dennis Woods
Lead Fleet Trainer
3.0
May 2013
Craig Messing
Dennis Woods
Guy Dalton
SHEQ HPO Manager
Lead Fleet Trainer
Fleet Compliance and
Safety Manager
2.4
April 2012
Dennis Woods
Lead Fleet Trainer
Dennis Woods
Lead Fleet Trainer
Guy Dalton,
Head of Transport
Safety/Compliance
2.3
November 2008
Dennis Woods,
Transportation ToE
Leader, Gases America
Brian Ledwon, IMSS
Technical Writer
Dennis Woods,
Transportation ToE
Leader, Gases America
2.2
June 2008
Dennis Woods,
Transportation ToE
Leader, Gases America
Brian Ledwon, IMSS
Technical Writer
Dennis Woods,
Transportation ToE
Leader, Gases America
2.1
October 2007
Dennis Woods,
Transportation ToE
Leader, Gases America
Fred Moudy, National
Fleet Trainer
Dennis Woods,
Transportation ToE
Leader, Gases America
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 19 of 21
2.0
July 2007
Dennis Woods,
Transportation ToE
Leader, Gases America
Joe McWilliams, National
Driver Trainer
Review Team
Gary Brooks, Driver
Trainer - Lima, OH
Dennis Woods,
Transportation ToE
Leader, Gases America
Dale Bowen, Driver
Trainer - Chester, VA
Dale Parks, CES Trainer Butler, PA
Ron Hans, CES Field
Technician - Butler, PA
John Smith, Engineer Murray Hill, NJ
Bill Jensen, Rehab Shop
Manager - Chattanooga,
TN
1.0
June 2003
Lori Lay, IMSS Technical
Writer
Redirect to CO2-22-09RNA
Change History
Version
3.2
Description of Change
Corrected the practical assessment link, which is now in DEL-01-52-RNA.
Corrected the Linde Driver Report/Customer Equipment Write-Up which is now in DEL-04-53-RNA
Deleted the obsolete link: DEL-04-51-RNA.
3.1
Connect and Fill the Customer Tank section: Added step 24 regarding alternative means of measuring
product delivered
3.0
Changed document title from "CO2 Product Filling and Delivery" to "Bulk Carbon Dioxide Delivery".
Rewrote entire document per current practice.
Updated the Traccess test and submitted document for retesting.
Added a Practical Assessment.
Updated the Attachment: PowerPoint: CO2 Unloading Procedure
Deleted the Forms:
2.4
•
Scale Ticket
•
Railcar Batch/Lot Tag
Converted from TRO-19-08-GAM to DEL-04-54-RNA. Updated to LiMSSv13.
Made changes to content to update procedures.
Updated links to converted DEL documents.
Removed the following:
•
Delivery Note
•
Manual Delivery Note
•
Bill of Lading
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 20 of 21
2.3
Added information about handling ice blockages.
2.2
Updates to Liquid Carbon Dioxide Trailer Delivery (Unloading Procedures).
2.1
•
Updates to Liquid Carbon Dioxide Trailer Delivery (Unloading Procedures).
•
Updates to PowerPoint: CO2 Unloading Procedure (see attachment).
2.0
CO2 Product Filling and Delivery (DEL-04-54-RNA) document created and no longer redirects to CO2-2209-RNA.
1.0
Redirect to CO2-22-09-RNA
Learning and Assessment Guide
DEL-04-54-RNA : Bulk Carbon Dioxide Delivery
Prerequisites
As a result of training in the content of this
document you will be able to:
Learning
method:
Assessment
method:
Reference:
Use the terms and definitions applicable to CO2
product filling and delivery.
Self Study and
Coaching
Multiple Choice
Test and On-theJob Training
Terms and Definitions (page
2)
Identify the special hazards involved.
Self Study and
Coaching
Multiple Choice
Test and On-theJob Training
Hazards of Carbon Dioxide
(page 3)
Apply the special handling procedures when
delivering CO2.
Self Study and
Coaching
Multiple Choice
Test and On-theJob Training
Liquid Carbon Dioxide
Trailer Delivery Procedures
(page 6)
Identify the types of valves used.
Self Study and
Coaching
Multiple Choice
Test and On-theJob Training
Liquid Carbon Dioxide
Trailer Delivery Procedures
(page 6)
Apply the liquid CO2 unloading procedures.
Self Study and
Coaching
Multiple Choice
Test and On-theJob Training
Liquid Carbon Dioxide
Trailer Delivery Procedures
(page 6)
Identify and complete the forms for CO2 delivery
Self Study and
Coaching
Multiple Choice
Test and On-theJob Training
Forms and Attachments
(page 18)
Assessment Complete
Sign
Date
Learner:
Assessor:
Other references
Practical Assessment Guide for CO2 Delivery (see attachment in DEL-01-52-RNA)
DEL-04-54-RNA Bulk Carbon Dioxide Delivery
Copyright © The Linde Group – Distributed by a locally registered Linde company
Uncontrolled Copy - do not use after date of printing
3.2 June 2013
Page 21 of 21