© 2019 Department of Petroleum Resources. All rights reserved Department of Petroleum Resources (DPR) PROCEDURE GUIDE

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Ring No. 
Thickness 
Type 
 of 
Vertical 
Joint 
Set in/out 
Thickness of Lap 
or Strap 
No. 
of 
Joints 
 
 
 
 
 
 
 
 
 
 
 
 
 
Deadwood Records: 
Description 
Number 
Size 
Elevation 
From 
To 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Type of bottom: 
Height of Crown: 
Other Details: 
Calibration Company:                                              
Measurements by: 
DPR official witnessing: 
 
 
2.5.8.2 Calibration Chart 
2.5.8.2.1 This shall contain information on the nominal dimensions of the tank, the weight of 
floating roof where applicable, the critical zone and any other special conditions. 
2.5.8.2.2 In addition to the main calibration table for the whole height of the tank (except 
the critical zone) which shall be in volume at 60ᵒF, floating roof displacement table 
and the calibration table for the critical zone of the tank shall be included in the main 
chart. Calibration chart shall conform generally with the format sketched below: 
Location: 
Date of Calibration: 
Name/ Address of Calibration Company: 
Name of Operator: 
Tank No: 
Nominal Dimensions: 
Nominal Capacity: 
Weight of Floating Roof: 
Table Volume at Standard Temperature of 60OF: 
Other Special Conditions: 
Production Depth:                                                       
Cumulative U.S. Barrels: 
 
       Prepared By:                                                                               Approved By: 
………………………                                                       ………………………. 
 Calibration Company Rep                                                     Director of Petroleum 
Resources