API 653 Intro 2024 Questions & Answers
| 100% Correct | Verified
What does API 653 cover? - ✔✔Steel storage tanks built to API 650 and its predecessor API 126. Provides
minimum requirements for maintaining integrity of such tanks after they have been placed in service and
addresses inspection, repair, alterations, relocation, and reconstruction.
What is the scope of API 653 limited to? - ✔✔scope is limited to tank foundation, bottom, shell,
structure, roof, attached appurtenances, and nozzles to the face of the first flange, first threaded joint, or
first welding in connection.
What shall govern if there is a conflict between API 653 and API 126? - ✔✔API 653 shall govern for tanks
that have been put in service.
Can the principles of API 653 be applied to tanks not built using the specifications of API 650? - ✔✔Yes,
storage tank owners/operators, based on the consideration of specific construction and operating
details, may apply this standard to any steel tank constructed in accordance with a tank specification.
What organizations is API 653 intended to be used by? - ✔✔Organizations that maintain or have access
to engineering and inspection personnel technically trained and experienced in tank design, fabrication,
repair, construction, and inspection.
Since API 653 does not contain rules or guidelines to cover all the varied conditions which may occur in
an existing tank, what shall the level of integrity be equal to if no design and construction details of a
tank are given and are not available in the as-built standard? - ✔✔details that will provide a level of
integrity equal to the level provided by the current edition of API 650 must be used.
Who has the ultimate responsibility for complying with the standards of AI 653? - ✔✔Owner/Operator
What governs if API 653 presents a direct or implied conflict with a jurisdictional regulation? - ✔✔The
regulation will govern, unless the requirement from API 653 is more stringent.
, What API standards shall be used to develop safe work procedures? - ✔✔API standard 2015 and API
2217A and shall include safeguards for personnel health and safety, prevention of accidental fires and
explosions, and prevention of property damage.
Define- Break Over Point - ✔✔The area on a tank bottom where settlement begins.
Define- Candidate Tank - ✔✔The tank(s) for which corrosion rates are not known
Define- Control Tank - ✔✔the tank(s) for which corrosion rates and service history are known.
Define- Critical Zone - ✔✔The portion of tank bottom or annular plate within 3" of the inside edge of the
shell, measured radially inward.
Define- Insert Plate - ✔✔A steel plate that replaced part of a shell plate with a nominal thickness no
more than 1/8" greater than the nominal thickness of the adjoining material. When an insert plate is
equal to the full height of a shell ring, it is considered to be a shell plate.
Define- Major Alteration/or Major Repair - ✔✔An alteration or repair that includes the following:
a) installing a shell penetration larger than NPS 12 beneath the liquid level
b) installing a bottom penetration within 12" of the tank shell
c) removing and replacing or adding a a shell plate beneath the liquid level where the longest dimension
of the replacement plate exceeds 12"
d) removing or replacing annular late material where the longest dimension of the replacement plate
exceeds 12"
e) complete or partial (more than 1/2 of the weld thickness) removal and replacement of more than 12"
of vertical weld joining shell plates or radial weld joining the annular plate.
f) installing new bottom plate (note: installation of a partition of a new bottom as described in 12.3.3.3 is
not defined as a major repair)
g) removing and replacing part of the weld attaching the shell to bottom, or to the annulaer plate ring, in
excess of the amounts listed in 12.3.2.5.1a
h) jacking a tank shell
| 100% Correct | Verified
What does API 653 cover? - ✔✔Steel storage tanks built to API 650 and its predecessor API 126. Provides
minimum requirements for maintaining integrity of such tanks after they have been placed in service and
addresses inspection, repair, alterations, relocation, and reconstruction.
What is the scope of API 653 limited to? - ✔✔scope is limited to tank foundation, bottom, shell,
structure, roof, attached appurtenances, and nozzles to the face of the first flange, first threaded joint, or
first welding in connection.
What shall govern if there is a conflict between API 653 and API 126? - ✔✔API 653 shall govern for tanks
that have been put in service.
Can the principles of API 653 be applied to tanks not built using the specifications of API 650? - ✔✔Yes,
storage tank owners/operators, based on the consideration of specific construction and operating
details, may apply this standard to any steel tank constructed in accordance with a tank specification.
What organizations is API 653 intended to be used by? - ✔✔Organizations that maintain or have access
to engineering and inspection personnel technically trained and experienced in tank design, fabrication,
repair, construction, and inspection.
Since API 653 does not contain rules or guidelines to cover all the varied conditions which may occur in
an existing tank, what shall the level of integrity be equal to if no design and construction details of a
tank are given and are not available in the as-built standard? - ✔✔details that will provide a level of
integrity equal to the level provided by the current edition of API 650 must be used.
Who has the ultimate responsibility for complying with the standards of AI 653? - ✔✔Owner/Operator
What governs if API 653 presents a direct or implied conflict with a jurisdictional regulation? - ✔✔The
regulation will govern, unless the requirement from API 653 is more stringent.
, What API standards shall be used to develop safe work procedures? - ✔✔API standard 2015 and API
2217A and shall include safeguards for personnel health and safety, prevention of accidental fires and
explosions, and prevention of property damage.
Define- Break Over Point - ✔✔The area on a tank bottom where settlement begins.
Define- Candidate Tank - ✔✔The tank(s) for which corrosion rates are not known
Define- Control Tank - ✔✔the tank(s) for which corrosion rates and service history are known.
Define- Critical Zone - ✔✔The portion of tank bottom or annular plate within 3" of the inside edge of the
shell, measured radially inward.
Define- Insert Plate - ✔✔A steel plate that replaced part of a shell plate with a nominal thickness no
more than 1/8" greater than the nominal thickness of the adjoining material. When an insert plate is
equal to the full height of a shell ring, it is considered to be a shell plate.
Define- Major Alteration/or Major Repair - ✔✔An alteration or repair that includes the following:
a) installing a shell penetration larger than NPS 12 beneath the liquid level
b) installing a bottom penetration within 12" of the tank shell
c) removing and replacing or adding a a shell plate beneath the liquid level where the longest dimension
of the replacement plate exceeds 12"
d) removing or replacing annular late material where the longest dimension of the replacement plate
exceeds 12"
e) complete or partial (more than 1/2 of the weld thickness) removal and replacement of more than 12"
of vertical weld joining shell plates or radial weld joining the annular plate.
f) installing new bottom plate (note: installation of a partition of a new bottom as described in 12.3.3.3 is
not defined as a major repair)
g) removing and replacing part of the weld attaching the shell to bottom, or to the annulaer plate ring, in
excess of the amounts listed in 12.3.2.5.1a
h) jacking a tank shell
