Underwater Visual Inspection (SM-EV-N2-G)

The Underwater Visual Assay is a technique used in the detection of large and small discontinuities. Its purpose is to periodically monitor the general condition of submerged structures, aiming to increase safety, operational continuity and the preservation of this great heritage, in addition to also verifying the conditions of the structure in relation to the project. It is widely used in offshore platforms certification processes, providing subsidy to classification societies. The inspection techniques apply to all offshore oil exploration, production and off-shore systems.

PROGRAM CONTENT

1st part

1-Introduction: Personnel Certification System (NA-003); basic principles; Concept of light, frequency, color, contrast; Vision; purpose of the test; application field; limitations compared to other trials; difficulties of the underwater visual test;

2- Understanding Welding and Deformation: welding processes, coated electrode, submerged arc, TIG, underwater (wet and dry), weld discontinuities, terminology, causes and characteristic positions, welding terminology, types of joints, welds, zones of the welded joint, deformations, terminology, causes, types and most frequent occurrences;

3- Submerged Structures and their Components: steel structures, concrete structures, cement and aggregates, framework, damages;

4- Notions about Castings, Forgings and Rolled Products: manufacturing processes, terminology of discontinuities, causes that contribute to the occurrence of the most frequent discontinuities and characteristic position of the discontinuities;

5- Notions about Corrosion: types, degrees, classification;

6- Notions about Coatings: paints, “coal-tar”, epoxy mass, concrete, application methods, terminology of characteristic discontinuities;

7- Notions about Technical Drawing: practice of execution and interpretation of drawings, ABNT NBR 6402 standard, location of points in marine structures;

8- Seabed: characterization, terminology, correlation between the appearance of the bed and possible occurrences in the structure and its components;

2nd part

9- Anodes: types, fixation, condition;

10 Visual Test Methods: direct, remote;

11- Apparatus and Instruments: types and selection, gauging and calibration;

12- Procedures: definition of irregularities or discontinuities to be observed, available states of surfaces, surface preparation, surface cleaning, lighting, test execution sequence, recording of results;

13- Indications: appearance of discontinuities, laminated, forged, cast, concrete, flexible hoses, welding, deformations, mechanical damage, corrosion, incrustations, wear and fixation of sacrificial anodes, wear and abrasion in components of submerged structures, non-relevant indications , influence of the type of discontinuities on the behavior of the part;

14- Technical Documents: : Familiarization with Petrobras N-133, N-1487, N-1812 and N-2073 standards; ABNT NBR 329, 16079 and 16244 and Abendi Documents – IT 136 and 137, LV 178, NA 003 and PR 076;

15- Protection: care in handling, protection against electric shocks and Practical Class .