5) Oil Chalk Test PDF [PDF]

Zitiervorschau

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TITLE PROCEDURE FOR OIL-CHALK TEST

OIL-CHALK TEST PROCEDURE

1. SCOPE: This test procedure shall be used to check the weld joint of shell to annular plate. 2. PURPOSE: The purpose of this procedure is provide a necessary guide line to carry out oilchalk test to check the weld joint of shell to annular plate. 3. SURFACE PREPARATION: The surface to be examined and the adjacent area within at least 1” shall be cleaned thoroughly, must be dry and free from dirt, oil, grease, scale, welding flux, spatters, paint and other foreign matter that could obstruct surface openings or otherwise interfere with the examination. 4. APPLICABLE CODE: API 650 Sec (Clause 7.2.4 (d)) / ASME Section V article 6). 5. PROCEDURE: After completion of root weld from inside of the shell to bottom joint, apply wet chalk solution by brush on the root weld uniformly. Allow the weld joint to dry thoroughly and then spray diesel/ kerosene on the opposite side of the weld (outside) by using the hand spray pump. 6. INSPECTION AND ACCEPTANCE CRITERIA: After the application of the penetrant oil, hold it as per the instruction of the Engineer-in-charge. (Duration time - 4 hrs for light diesel ,high flash point penetrating oil) API 650 Cl 7.2.4 (d) Edition XIth. Examine the root weld visually for the evidence of wicking.

Prepared by

Concurred by

Approved by

CONTRACTOR

Hindustan Petroleum Crop. Ltd.

Hindustan Petroleum Crop. Ltd

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TITLE PROCEDURE FOR OIL-CHALK TEST

7. REPAIR AND RETEST: If any defect found then the same shall be repaired as per the approved procedure. Re examine the repair spot and additionally minimum 150mm. for repair spot on both directions. Repeat the process until there is no evidence of leaking. After completion of the test thoroughly clean the joint from both sides for the further welding. 8. INSPECTION REPORT: Test shall be carried out jointly and to the satisfaction of the Engineer-in-charge. Test to be recorded in the approved format.

Prepared by CONTRACTOR

Concurred by

Approved by

Hindustan Petroleum Crop. Ltd.

Hindustan Petroleum Crop. Ltd