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Free API 653 flashcards

12 flashcards from the V. Practical knowledge - specific (API 653 and 650, RP 571 listed mechanisms, RP 575, RP 576, RP 577, RP 651, RP 652) domain. Read the front, show the answer, then grade yourself. Cards you miss come back sooner when you return to this page. No signup.

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Flashcard · V. Practical knowledge - specific (API 653 and 650, RP 571 listed mechanisms, RP 575, RP 576, RP 577, RP 651, RP 652)

Which document governs the inspection and evaluation of a tank that is already in service?

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Which document governs the inspection and evaluation of a tank that is already in service?
API 653. It points back to API 650 for specific construction rules, but API 650 itself is the standard for new tanks.API 653 scope; API 650 scope
What does API 650 cover?
New welded steel tanks: materials, design, fabrication, erection, inspection of joints, and welding procedure and welder qualification.API 650 scope
What are the Annex C checklists for?
A guide to completeness for in-service and out-of-service inspections. They aid judgment; they do not replace it.API 653 Annex C
Name four shell distortions to evaluate.
Out-of-roundness, buckling, peaking and banding at welds.API 653 Section 4; API RP 575
Can a crack in a shell plate be averaged away like general corrosion?
No. Cracks are evaluated and normally removed and repaired.API 653 Section 4; API RP 575
What can cathodic protection under a tank bottom protect?
Only steel in contact with the soil (the underside). It does nothing for the product side.API RP 651
Galvanic anodes versus impressed current: which needs a rectifier?
Impressed current. Galvanic (sacrificial) anodes drive their own current with no outside power.API RP 651: methods of cathodic protection
What can stop CP current from reaching a tank bottom?
An impermeable liner or a second bottom between the anodes and the bottom.API RP 651: need for cathodic protection
Name four causes of tank bottom lining failure.
Poor surface preparation, soluble salts left in pits, application over a damp surface, and wrong mixing or cure (also mechanical damage and product incompatibility).API RP 652: causes of lining failure
How is a finished bottom lining checked for pinholes?
By holiday testing.API RP 652: application
Why is GMAW short-circuiting transfer prone to lack of fusion on thick plate?
It runs cool, so thick sidewalls may not melt.API RP 577: welding processes
Name the three stages of welding inspection.
Before welding (procedure, welder, fit-up, materials), during welding (preheat, technique, cleaning) and after welding (visual, NDE, records).API RP 577: welding inspection