Vapor Pressure by Grabner CCA-VPS
Area
3
Job Hazards
Unit
Lab
Yes
Operating Procedure #
OPS-LB-PT-020
Job Hazards
Access and Egress
Moving Parts
Activities of Others
Noise
Adverse Weather
Rail Movement
Chemical Exposure
Sharp Edges
Electricity
Slips, Trips, and Falls
Fatigue
Static Electricity
Fire and Explosion
Trip Injuries
Ground Contamination
Trapped Pressure
Manual Handling
Working at Height
Certified by
Yes
Revision #
Scope / Objective
Page
1 of 2
PPE
Standard (SSP-0011)
This procedure covers the determination of the total vapor pressure of
petroleum samples using the EPA formula. This method is suitable for
liquids exerting a vapor pressure between 1 and 18.6 psi @ 100°F.
Full Face Shield / Goggles
Hood
Clothing—Chemical Protection
Gloves—Chemical
Personal Fall Protection
Respirator / Filter Mask
References / Documents
Supplied Air
 ASTM D 5191
Other:
Equipment
Ice Bath (32 – 34°F)
Grabner CCA-VPS Vapor Pressure
Analyzer


Date
10.11.2011
Materials and Reagents
Vacuum Pump
Citizen Printer (CMB-910)



Special Instructions
2.2 – Dimethylbutane (≥ 99% purity)

Toluene
Environmental
Vapor Pressure by Grabner CCA-VPS
IMPORTANT: Vapor pressure determination must be performed on the first test specimen withdrawn from sample container.
1
Cool sample in ice bath to 32-34°F (approximately 30 minutes).
2
Remove sample from bath and wipe dry.
Verify that sample container is 70-80% full:
If container is…
Then…
Less than 70% full
Discard sample and request new one.
Greater than 80% full Pour out enough sample to bring volume to within 70-80% full,
reseal sample and return to bath. Repeat Steps 1-3.
70-80% full
Proceed to Step 4.
3
4
Unseal cap momentarily before resealing it so that samples in transparent containers are treated the same as samples in
nontransparent containers.
5
Return sample to ice bath for 2 minutes.
6
Once sample temperature is again 32-34°F, remove container from bath, wipe dry, remove cap taking care that no water enters,
reseal and shake vigorously before returning to bath for 2 minutes.
7
Repeat Step 6 twice more.
8
Insert adapter end(s) of sampling tube(s) into sample port(s) (on right side of instrument).
Completed Date:
Note:
Prepared By:
Approved By:
This procedure is only valid at the time of printing. The control version can be found on the Meraux Refinery intranet.
Use
Y
Vapor Pressure by Grabner CCA-VPS Continued
Area
3
Unit
Lab
Operating Procedure #
OPS-LB-PT-020
Certified by
Revision #
Date
10.11.2011
Page
2 of 2
Vapor Pressure by Grabner CCA-VPS Continued
9
Unscrew knurled nut to remove waste reservoir from left side of instrument.
10
Place tubing from vacuum pump over waste port.
11
Ensure vacuum pump has sufficient oil.
12
From starting display, the cursor is on “ * measuring”; press task button.
13
Turn on vacuum pump and observe pressure reading (bottom right of display screen).
14
Ensure pressure drops to 0.03 psi or less.
15
Turn off pump, disconnect tubing and reattach waste reservoir.
16
Input sample information (using arrow keys):
a. Move cursor to “number: #.#” – enter sample port # in the first # position.
b. The second # position is for the desired number of measurements (ex., “number: 3.2” means the sample in position 3 of the
sampler will be measured 2 times).
c. To give sample a particular name, shift cursor to “ * name” and press Task.
i.
The number # after name is the port position on the multi-sampler (1-6) and should be changed for each port position
(sample name).
ii.
To select sample name from list, shift cursor to # position to right side of display and scroll through list using arrow keys;
once desired name is located, shift cursor from # position to one of the letters of the name and press “Task”.
iii. To create a new sample name, place cursor on letters in sample name in the “name:# XXXXXXX” field and use arrow keys
to shift through various numbers and letters of the alphabet. (Holding down RUN together with ↑ or ↓ key allows scrolling
through alphabet in steps of 10 letters at a time.)
iv. Continue adding sample names and updating sampler position until all sample names have been entered.
17
Immerse sampling tube(s) into sample(s) ensuring order corresponds to sample info entered previously.
18
Press RUN button to begin measurement(s).
19
Results are printed automatically as each sample analysis is completed.
Completed Date:
Note:
Prepared By:
Approved By:
This procedure is only valid at the time of printing. The control version can be found on the Meraux Refinery intranet.