Daily Check Of Dc Coil And Ac Yoke

THAILAND INDUSTRIAL PROCEDURE

DEI EQUIPMENT IN-HOUSE CHECK Approved: J Dolan

DAILY CHECK DC Coil and AC Yoke 1.

SCOPE In-house daily checking procedure for DC Coil and AC Yoke shall conform to applicable standards.

2.

REFERENCE

2.1

DS-1™ Drill Stem Inspection TH Hill and Associates.

2.2

API 5A5 – Field Inspection of New Casing, Tubing and Plain-End Drill Pipe

2.2.1

ASTM E709-08 – Standard Guide for Magnetic Particle Testing

3.      APPARATUS 3.1

Calibrated 4.5 Kgs/10 Lbs Dead Weight

3.2

Flux Indicator( Burmah Castrol Strip )

3.3

Magnetometer

3.4

Black Light

3.5

Black Light Hood

4.      PROCEDURE ( Coil ) 4.1 4.2

Placed flux indicator parallel to the thread helix on last threads of the box or female connection or under the last thread near the shoulder on the ID surface of pin or male connection. Check the polarity of the residual magnetic field on the tool to be checked.

4.3

Set up coil directly under the last thread areas make sure that the polarity direction of the coil is the same as the tool.

4.4

Spray the flux indicator with properly agitated fluorescent magnetic particle ink while the coil is energised.

4.5

Check the indication on the flux indicator. A good magnetization will indicate 3 lines are present on the flux indicator.

4.6

Log the findings on the approved daily log sheet.

5.

PROCEDURE ( AC Yoke )

5.1

Placed dead weight on a flat surface.

THAILAND INDUSTRIAL PROCEDURE

DEI EQUIPMENT IN-HOUSE CHECK Approved: J Dolan

5.2

Adjust the leg as per the inspection leg distance to used or 4” 6” apart.

5.3

Placed the AC Yoke at the centre of the dead weight.

5.4

Make sure that a maximum contact between the leg and dead weight is satisfied.

5.5

Energised and lift the AC Yoke while the dead weight is attached above the surface for ten seconds.

5.6

Log the findings on the approved daily log sheet.

6.

REPORT The report should have the following information:

a) b) c) d) e) f) g)

Name of equipment Asset or serial number of equipment Date of checking Result of check Name of personnel carrying out the check Signature of personnel carrying out the check Identification of reference equipment used

7.

Proforma

7.1

DC Coil and AC Yoke Daily Log Sheet