Pressure Testing Flashcards
7 cards from real API 510 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Pressure Testing flashcards as text
What type of fluid is preferred for hydrostatic pressure testing per ASME and API 510?
Answer: Water
Water is the preferred hydrostatic test medium because it is essentially incompressible and minimizes stored energy in the event of a failure.
When is a pneumatic test permitted instead of a hydrostatic test per API 510?
Answer: When water is unavailable and the engineer approves
A pneumatic test may be substituted when the vessel cannot be safely filled with water or when design considerations prevent hydrostatic testing, with proper engineering approval.
Per API 510, what is the maximum temperature of the test water during a hydrostatic pressure test to minimize brittle fracture risk?
Answer: At least 60°F (16°C)
The test water temperature should be at least 60°F (16°C) to reduce the risk of brittle fracture during pressure testing.
After completing a successful hydrostatic test, what must be done before the vessel is returned to service?
Answer: Drain and dry the vessel if required by service
The vessel must be drained and dried as needed before returning to service, particularly if the process fluid is incompatible with water.
Who is responsible for witnessing or reviewing the pressure test documentation for a vessel repair under API 510?
Answer: The authorized pressure vessel inspector (API 510)
The authorized pressure vessel inspector (API 510 certified) is responsible for witnessing or reviewing pressure test documentation for repairs.
A vessel repaired by welding is to be pressure tested. Which document must be completed before the test?
Answer: Repair/Alteration Form (API Form)
A Repair/Alteration Form must be completed and accepted by the authorized inspector before a pressure test following repair or alteration.
When pressure testing a vessel with multiple chambers, which approach is typically taken?
Answer: Test each chamber independently at its respective test pressure
Each chamber must be tested independently at its own required test pressure to ensure each compartment meets its design requirements.