Vapor Pressure by Grabner MiniVap VPS
Area
3
Job Hazards
Unit
Lab
Yes
Operating Procedure #
OPS-LB-PT-021
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
Date
09.20.2011
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 vapor pressures 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 D5191
Other:
Equipment
Ice Bath (32 – 34°F)
Grabner MiniVp VPS Vapor Pressure
Analyzer


Revision #
Materials and Reagents
Vacuum Pump
Citizen Printer, C3M 910



2.2 – Dimethylbutane (≥ 99% Purity)
Special Instructions

Toluene
Environmental
Vapor Pressure by Grabner MiniVap VPS
IMPORTANT: Vapor pressure determination must be performed on the first test specimen withdrawn from sample container.
1
Cool sample in ice bath or refrigerator to 32 – 34°F (approximately 30 minutes).
2
Remove sample from bath and wipe dry.
Verify that sample container is 70 – 80% full:
If contai ner i s …
Then…
Les s than 70% ful l
Di s card s ampl e and reques t new one.
Pour out enough s ampl e to bri ng vol ume to
wi thi n 70-80% ful l , res eal s ampl e and return
to bath. Repeat s teps 1-3.
3
Greater than 80% ful l
70-80% Ful l
Proceed to Step 4.
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.
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 MiniVap VPS Continued
Area
3
Unit
Lab
Operating Procedure #
OPS-LB-PT-021
Certified by
Revision #
Date
09.20.2011
Page
2 of 2
Vapor Pressure by Grabner MiniVap VPS Continued
8
Insert adapter end(s) of sampling tube(s) into sample port(s).
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, press STOP key so that cell pressure may be observed (bottom right of screen).
13
Turn on pump and ensure cell pressure drops to 0.03 psi or less.
14
Turn off pump, disconnect tubing and reattach waste reservoir.
Input sample information:
a. Shift cursor using arrow keys to *name, press TASK.
b. The menu for name editing appears:
***********************************
← name: x yyyyyy
15
c. The character X next to name: is the position of the port (1 to 6) and should be updated for each sample name using arrow keys.
d. Sample identification YYYYYYYY next to name: X can be changed using arrow keys
NOTE: In order to scroll more quickly through numbers and alphabet you can press ↑ or ↓ key simultaneously with RUN which will
enable scrolling in steps of 10 letters.
e. On right side of display is list of pre-programmed sample names – browse through list with cursor placed on the X (← X
ABCDEFGH) inside the parentheses.
f. Once all sample names have been selected with appropriate port numbers, move cursor using arrow key to ← icon to far left of
display, press TASK.
16
Immerse sampling tube(s) into sample(s) ensuring order corresponds to sample info entered from Step 15.
17
Press RUN button to begin measurement(s).
18
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.