Standard Calibration Procedure
Test Subject: API Plug and Ring
Procedure #: QSCP-95
Revision #: 2.0
Date: 5/13/2012
Approval: James Cagle
1.0
Purpose
1.1
2.0
3.0
4.0
To establish a standard procedure for calibration of API Plugs and Rings.
Requirements
2.1
The calibration laboratory shall be furnished with all items of equipment (including
reference materials) required for the correct performance of calibrations and tests. In
those cases where the laboratory needs to use equipment outside its permanent control, it
shall ensure that the relevant requirements of this section are met.
2.2
All measuring and testing equipment having an effect on the accuracy or validity of
calibrations or tests shall be calibrated and/or verified before being put into service. The
laboratory shall have an established program for the calibration and verification of its
measuring and test equipment. The program will ensure the recall or removal from
service of any standard or equipment that has exceeded its calibration interval or is
otherwise judged to be unreliable.
2.3
The laboratory shall use appropriate methods and procedures for all calibrations and tests
and related activities within its responsibility (including sampling, handling, transport and
storage, preparation of items, estimation of uncertainty of measurement and analysis of
calibration and/or test data). They shall be consistent with the accuracy required and with
any standard specifications relevant to the calibrations or tests concerned.
2.4
The laboratory shall have documented instructions on the use and operation of all
relevant equipment, on the handling and preparation of items, and for calibration and/or
testing, where the absence of such instructions could jeopardize the calibrations or tests.
All instructions, standards, manuals and reference data relevant to the work of the
laboratory shall be maintained up-to-date and be readily available to the staff.
Referenced Documents
3.1
ISO 17025
3.2
NIST Handbook 150
3.3
NIST Technical Note 1297
3.4
ANSI/NCSL Z540-1
3.5
ANSI/API Spec 7-2, First Edition
Materials Required
4.1
Cleaned and inspected Master Gages.
Page 1 of 4
QualiCal, LLC Quality Management System Calibration Procedures
Standard Calibration Procedure
Test Subject: API Plug and Ring
Procedure #: QSCP-95
Revision #: 2.0
Date: 5/13/2012
Approval: James Cagle
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
4.11
5.0
Lubricating Oil
Thinner
Zep ID Cleaning Solution
Lint free cloths
Hi-Cal 150 Height Gage for measuring standoff.
Granite Surface Plate
Torque Hammer and Weights
Vice/Sleeve and securing peg
Laboratory Form QAF-022, Rev. 2.0
Gagemaker Certifi Software
Tolerance / Measurement Range / Measurement Uncertainties
5.1
Tolerance will be as per API Gaging Practice Handbook, and OEM Technical Brief Doc
100 REV. B. and ANSI/API Specification 7-2, First Edition. See following;
o
o
o
o
Master Ring mated to Master Plug
Master Ring mated to Working Plug
Master Plug mated to Working Ring
Working Ring mated to Working Plug
= +0.0005 / -0.003
= +0.004 / -0.004
= +0.004 / -0.004
= +0.0005 / -0.003
For EUE (UPTBG) gages the tolerances will be as per API Specification 5B, see
following:
o
o
o
o
5.2
Master Ring mated to Master Plug
Master Ring mated to Working Plug
Master Plug mated to Working Ring
Working Ring mated to Working Plug
Torque Hammer Weight Selection:
Hammer Weight
2lb
3lb
4lb
6.0
= Reference Only
= +0.025 / -0.025
= +0.025 / -0.025
= +0.0125 / -0.0195
Size
2 3/8”
2 7/8”
3 ½”
4”
4 ½”
6 5/8”
Thread
REG, EUE
EUE, REG, IF
EUE, REG, IF
IF
REG, IF
REG, FH
Procedure
6.1
6.2
Working Gages shall be placed in thinner for a period of no less than 2 hours to help with
removal of any oils and grime build up.
Once removed, they will be cleaned using a lint free cloth and ZEP ID cleaning solution,
cleaning between each and every thread.
Page 2 of 4
QualiCal, LLC Quality Management System Calibration Procedures
Standard Calibration Procedure
Test Subject: API Plug and Ring
Procedure #: QSCP-95
Revision #: 2.0
Date: 5/13/2012
Approval: James Cagle
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.12
6.13
6.14
7.0
Records
7.1
8.0
Apply a small amount of light oil to the inside of the ring and turn the ring to evenly coat
the inside.
Make up the gages, hand tight and sit on granite block for at least 1 hour. After the 1
hour period insert the made up gage handle into appropriate sleeve/vise and insert
securing peg through hole of handle. Gage should not move. Choose appropriate weight
for the torque hammer (use the above table in 5.2). Insert the torque hammer into hole on
ring and allow the weight to drop (using gravity for force only), for 12 drops. Remove
gages from vise.
Sit gages on granite block and using the height gage measure the working plug’s standoff
from the working ring.
Do this in 4 places around the gage and Record results, working out the “mean” value of
the 4 readings.
Do the same procedure using mated master gages, then master plug mated with master
ring and so on until the form is complete.
Check results against allowable tolerances. If a pass is recorded continue with
documentation. If a fail is recorded work will have to be conducted on the gages (either
shimming or grinding face plate).
Clean Masters and store in Lab.
Print all documentation, and prepare Calibration Certificate in CERTIFI. A copy of the
master gage’s Calibration Certificate needs to be included with QualiCal certificate.
QA Manager to review all documentation.
Place Calibration sticker on equipment.
Prepare all collection/shipment documents and contact customer.
Place M&TE in outgoing area with customer name clearly visible.
The records for item requiring calibration shall include an individual record of calibration
or verification, or other means of control. This record shall provide a description or
identification of the item, calibration interval, date calibrated, identification of the
calibration source, calibration results (data and/or condition status) and calibration action
taken (adjusted, repaired, new value assigned, de-rated, etc.).
Calibration Status
8.1
Item shall be labeled to indicate calibration or verification status. The label shall identify
specific date calibrated (date, month, year, Julian date, or equivalent) and the specific
calibration due date or usage equivalent. Items not calibrated to their full capability or
which have other limitations of use, shall be labeled or otherwise identified as to the
limitations. When it is impractical to apply a label directly to an item, the label may be
affixed to the instrument container or some other suitable means may be used to reflect
calibration status. Tamper resistant seals are affixed to operator accessible controls or
adjustments, which if moved will invalidate the calibration. The quality system shall
provide instructions for disposition of equipment with broken tamper resistant seals.
Page 3 of 4
QualiCal, LLC Quality Management System Calibration Procedures
Standard Calibration Procedure
Test Subject: API Plug and Ring
Procedure #: QSCP-95
Revision #: 2.0
Date: 5/13/2012
Approval: James Cagle
9.0
Storage and Handling
9.1
Items shall be handled, stored, and transported in a manner which shall not adversely
affect the calibration or condition of the equipment.
Page 4 of 4
QualiCal, LLC Quality Management System Calibration Procedures