API 653 Pressure Testing 5

Question 1

According to API 653, after completing a successful hydrostatic test, what must be done with the test records?

Accepted Answer

Included in the tank's permanent file maintained by the owner/operator

Answer

API 653 requires that all hydrostatic test records become part of the tank's permanent file, retained by the owner/operator for the life of the tank.

Question 2

When a tank shell repair involves installing a flush patch plate, API 653 requires the completed patch weld to be tested by:

Accepted Answer

Hydrostatic test or other leak test acceptable to the engineer

Answer

API 653 requires flush shell patch welds to be verified by hydrostatic test or another leak test method acceptable to the engineer of record.

Question 3

Which API 653 provision allows an inspector to accept a repaired tank into service WITHOUT performing a new hydrostatic test?

Accepted Answer

Both A and C

Answer

API 653 allows bypass of hydrostatic retesting when repairs are limited to non-pressure items (coating) or when pressure-retaining weld repairs are fully radiographed to API 650 standards.

Question 4

During a hydrostatic test in cold climates, what precaution does API 653 recommend to prevent shell brittle fracture?

Accepted Answer

Use heated water to keep shell metal temperature above the minimum design metal temperature (MDMT)

Answer

API 653 recommends using heated water so that the shell metal temperature remains above the MDMT, preventing brittle fracture during the hydrostatic test.

Question 5

What does API 653 require an authorized inspector to verify about the tank's venting system before starting a hydrostatic fill?

Accepted Answer

That adequate venting exists to prevent vacuum or over-pressure conditions during filling and emptying

Answer

The inspector must confirm adequate venting is available to prevent tank vacuum collapse during draining and overpressure during filling before the hydrostatic test begins.

(API 653) API 653 Aboveground Storage Tank Inspector Certification Practice Test

(API 653) API 653 Aboveground Storage Tank Inspector Certification Practice Test

API 653 Pressure Testing 5