Descripción: Exam Essentials Practice Tests 2 CAE 2015 format
abc
laporan listrikFull description
Full description
Teknik ElektroDeskripsi lengkap
Full description
laporan praktikumFull description
PNEUMATIC handbook
DOC NO
DATE PAGE NO 01 OF 03
PROJECT
TITLE PROCEDURE FOR PNEUMATIC P RESSURE TEST
PNEUMATIC PRESSURE TEST 1. SCOPE The objective of the pneumatic pressure testing is to locate leaks in the welds of the reinforcement plates to shell plates and pontoons of floating roof roof .This is accomplished by applying a soap solution to a local area of the pressure boundary surface and creating a differential pressure across that local area of the boundary causing the formation of bubbles as leakage gas passes through the solution. 2. PURPOSE The purpose of this procedure is provide a guide line to carry out the Pneumatic pressure test to check soundness of welds of the reinforcement plates to shell plate and the welds of roof seam of cone roof tank. 3.
REFERENCE CODE 1. API-650 (Latest edition) (7.3.4) Eleventh Edition 2.TABLE I-1021 of ASME Section V, July 1, 2008 Edition.
4. EQUIPMENT 4.1. The test scheme shall have suitable connections, necessary valve and calibrated pressure gauge. The gauge shall have a range of 0 psi to 15 psi or equivalent Pressure limits such as 0 in.Hg to 30 in.Hg. 4.2. An air pressure can be created by any convenient method, such as connection to a gasoline or diesel motor intake manifold or to an air ejector or pump. 4.3. Gases: The test gas will normally be air; however inert gases may be used. 4.4. Bubble solution: As per ASME-V, I-1032. 5.
PERSONAL The personnel shall be competent and have thorough knowledge in performing this method.
Prepared by
Concurred by
Approved by
CONTRACTOR
Hindustan Petroleum Crop. Ltd.
Hindustan Petroleum Crop. Ltd
DOC NO DATE PAGE NO 02 OF 03
PROJECT LONI REVAMPING PROJECT
TITLE PROCEDURE FOR PNEUMATIC P RESSURE TEST
6. SURFACE PREPARATION The surface to be examined and all adjacent areas shall be cleaned thoroughly and free from all dirt, grease, lint, scale, welding flux, weld spatters, paint, oil and other extraneous matter that could obstruct surface openings or otherwise with the examination. Prior to pneumatic pressure testing, joint shall be checked visually. 7. PROCEDURE SHELL APPURTENANCESREINFORCEMENT PLATES TO SHELL PLATES WELDS The temperature of the surface of the part to be examined shall not be below 400F( 50C) nor above 125 0F( 500C) Make 6mm diameter-screw threaded Tell tale hole in the reinforcement pads before its welding to shell and shell appurtenances. The reinforcements pads shall be tested by applying up to 2 psi in the pressure gauge between the tank shell and reinforcement plates on each opening using tell tale hole Use soap suds on welds between reinforcement plate to shell, reinforcement plate to appurtenances to shell plate if any defect noticed. Repair the defective weld and repeat the test till entire satisfaction. Close the tell tale with a bolts or screw.
8. INDICATION OF LEAKAGE: The presence of continuous bubble growth on the surface of the material indicates leakage through an orifice passage(s) in the region under examination.
Prepared by
Concurred by
Approved by
CONTRACTOR
Hindustan Petroleum Crop. Ltd.
Hindustan Petroleum Crop. Ltd
DOC NO DATE PAGE NO 03 OF 03
PROJECT
TITLE
LONI REVAMPING PROJECT
PROCEDURE FOR PNEUMATIC P RESSURE TEST
A minimum light intensity of 1000 lux is required for conducting the examination. 9. REPAIR/RETEST Defects in welds shall be repaired by chipping, grinding or melting out the defects from one side or both sides of the joints, as required and rewelding. Only the cutting out of defective joints that is necessary to correct the defects is required. After repairing retest of Pneumatic pressure test shall be carried out. 10. CLEANING After test the area shall be thoroughly cleaned for the further activities. 11. INSPECTION REPORT The test shall be carried out in presence of the Engineer In charge /HCPL Inspector. Upon satisfactory inspection, a report shall be prepared as per HPCL approved format. 12. SAFETY Safety shall be followed as per HSE specification during test. 13. Acceptance Criteria: The area under test is acceptable when no continuous bubble formation is observed.
