API 510 (Pressure Vessel Inspection
Code)
ACFM - ANS - Alternating current field measurement
\Alteration - ANS - A physical change in any component that has design implications that affect
the pressure-containing capability of a pressure vessel
\API 510 coverage - ANS - In-service inspection, repair, alteration, and rerating activities for
pressure vessels and the pressure-
relieving devices
\API 510 includes - ANS - a) vessels constructed with construction code
b) vessels constructed with no construction code
c) vessels constructed and approved as jurisdictional special
d) A vessel fabricated with no nameplate or stamping
\Applicable construction code - ANS - code generally accepted engineering standard or practice
to which the pressure vessel was built or which is deemed by the owner/user or the engineer
\Approval - ANS - 1. The inspector may establish hold points to be implemented during the work
execution.
2. For alteration, engineer should be the one who approve
3. Before any repairs or alterations are performed, all proposed methods of design, execution,
materials, welding procedures, NDE, and testing must be approved by the inspector
4. An engineer shall approve all nozzle installations.
\Authorization - ANS - 1. All repair and alteration work must be authorized by the inspector
before the work is started by a repair organization.
2. Alterations to pressure vessels that comply with ASME should an engineer has also
authorized the work. The inspector will designate the hold points that are required.
3. The inspector may give prior general authorization for limited or routine repairs on a specific
vessel provided the inspector is satisfied with the competency of the repair organization and the
repairs are the kind that will not require a pressure test.
\Authorized inspection agency - ANS - a. The inspection organization of the jurisdiction
b. The inspection organization of an insurance company
c. The inspection organization of an owner or user of pressure vessels
d. An independent organization or individual that is under contract to and under the direction of
an owner/user
\Buried Vessels - ANS - Determine their external surface condition. The inspection interval shall
be based on corrosion rate information obtained
■ During maintenance activity on connecting piping of similar material
, ■ From the interval examination of similarly buried corrosion test coupons of like material
■ From representative portions of the actual vessel
■ From a vessel in similar circumstances.
\CML Monitoring - ANS - a. shall be monitored by performing a representative number of
examinations at CMLs to satisfy the requirements for an internal or on-stream inspection
b. Corrosion rates, the remaining life and next inspection intervals should be calculated to
determine the limiting component.
c. The rate of corrosion/damage shall be determined from successive measurements and the
next inspection interval appropriately established.
d. Where thickness measurements are obtained at CMLs, the minimum thickness at a CML can
be located by ultrasonic measurements or radiography.
e. The thinnest reading or an average of several measurement readings taken within the area of
an examination point shall be recorded and used to calculate the corrosion rates.
f. Examination points should be permanently recorded to allow repetitive measurements at the
same CMLs. Repeating measurements at the same location improves accuracy
of the calculated damage rate
\CML Selection - ANS - A decision on the type, number, and location of the CMLs should
consider results from previous inspections, the patterns
of corrosion and damage that are expected and the potential consequence of loss of
containment.
\Communication - ANS - ■. Personnel should obtain permission to work in the vicinity from
operating personnel responsible for the pressure vessel.
■ When inside a vessel, all persons working around the vessel should be informed that people
are working inside the vessel.
■ Individuals working inside the vessel should be informed when any work is going to be done
on the vessel's exterior
\Condition Monitoring Locations (CMLs) or Thickness Monitoring Locations (TMLs) - ANS -
Designated areas on pressure vessels where periodic examinations are conducted to monitor
the presence and rate damage.
\Consequence Assessment - ANS - The consequence of a release is dependent on type and
amount of process fluid contained in the equipment
\Contents of an Inspection Plan - ANS - Shall contain the inspection tasks and schedule
required to monitor damage mechanisms and assure the mechanical integrity of the equipment
■ Type(s) of inspection needed
■ Identify the next inspection date
■ Describe the extent and locations of inspection and NDE
■ Describe the surface cleaning requirements needed for inspection
■ Describe the requirements of any needed pressure test
■ Describe any required repairs
OPTIONAL
■ Describing the types of damage anticipated or experienced in the equipment
■ Defining the location of the damage
■ Defining any special access requirements
, \Controlled-deposition Weld Method (Notch Test Required) - ANS - a. Notch toughness testing,
such as that established by ASME Code Section VIII: Division 1, parts UG-84 and UCS-66, is
necessary when impact tests are required by the original code of construction or the
construction code applicable to the work planned.
b. The materials shall be limited to P-No. 1, P-No. 3, and P-No. 4 steels.
c. The welding shall be limited to the shielded-metal-arc welding (SMAW), gas-metal-arc
welding (GMAW), and gas-tungstenarc
welding (GTAW) processes.
d. A weld procedure specification shall be developed and qualified for each application. The
welding procedure shall define the
preheat temperature and interpass temperature and include the post heating temperature
requirement in f(8). The qualification
thickness for the test plates and repair grooves shall be in accordance with Table 8-1.
The test material for the welding procedure qualification shall be of the same material
specification (including specification type,
grade, class and condition of heat treatment) as the original material specification for the repair.
If the original material specification
is obsolete, the test material used should conform as much as possible to the material used for
construction, but in no case
shall the material be lower in strength or have a carbon content of more than 0.35%.
e. When impact tests are required by the construction code applicable to the work planned, the
PQR shall include sufficient tests
to determine if the toughness of the weld metal and the heat-affected zone of the base metal in
the as-welded condition is adequate
at the minimum design metal temperature (such as the criteria used in ASME Code Section VIII:
Division I, parts UG-84 and
UCS 66). If special hardness limits are necessary (for example, as set forth in NACE RP 0472
and MR 0103) for corrosion resistance,
the PQR shall include hardness
\Corroded Areas in Vessel Heads - ANS - The required thickness at corroded areas of
ellipsoidal and torispherical heads can be determined as follows:
a. In the knuckle region of the head, use the appropriate head formula in the construction code.
b. In the central portion of the head, use the hemi-spherical head formula in the construction
code. The central portion of the head
is defined as the center of the head with a diameter equal to 80% of the shell diameter.
\Corrosion rate - ANS - The rate of metal loss due to deteriotation with its environment
\Corrosion Rate Determination - ANS - ■ Suitable use of short-term versus long-term corrosion
rates shall be determined by the inspector.
■ Short-term corrosion rates are typically determined by the two most recent thickness readings
whereas long-term rates use the most recent reading and one taken earlier in the life of the
equipment.
Code)
ACFM - ANS - Alternating current field measurement
\Alteration - ANS - A physical change in any component that has design implications that affect
the pressure-containing capability of a pressure vessel
\API 510 coverage - ANS - In-service inspection, repair, alteration, and rerating activities for
pressure vessels and the pressure-
relieving devices
\API 510 includes - ANS - a) vessels constructed with construction code
b) vessels constructed with no construction code
c) vessels constructed and approved as jurisdictional special
d) A vessel fabricated with no nameplate or stamping
\Applicable construction code - ANS - code generally accepted engineering standard or practice
to which the pressure vessel was built or which is deemed by the owner/user or the engineer
\Approval - ANS - 1. The inspector may establish hold points to be implemented during the work
execution.
2. For alteration, engineer should be the one who approve
3. Before any repairs or alterations are performed, all proposed methods of design, execution,
materials, welding procedures, NDE, and testing must be approved by the inspector
4. An engineer shall approve all nozzle installations.
\Authorization - ANS - 1. All repair and alteration work must be authorized by the inspector
before the work is started by a repair organization.
2. Alterations to pressure vessels that comply with ASME should an engineer has also
authorized the work. The inspector will designate the hold points that are required.
3. The inspector may give prior general authorization for limited or routine repairs on a specific
vessel provided the inspector is satisfied with the competency of the repair organization and the
repairs are the kind that will not require a pressure test.
\Authorized inspection agency - ANS - a. The inspection organization of the jurisdiction
b. The inspection organization of an insurance company
c. The inspection organization of an owner or user of pressure vessels
d. An independent organization or individual that is under contract to and under the direction of
an owner/user
\Buried Vessels - ANS - Determine their external surface condition. The inspection interval shall
be based on corrosion rate information obtained
■ During maintenance activity on connecting piping of similar material
, ■ From the interval examination of similarly buried corrosion test coupons of like material
■ From representative portions of the actual vessel
■ From a vessel in similar circumstances.
\CML Monitoring - ANS - a. shall be monitored by performing a representative number of
examinations at CMLs to satisfy the requirements for an internal or on-stream inspection
b. Corrosion rates, the remaining life and next inspection intervals should be calculated to
determine the limiting component.
c. The rate of corrosion/damage shall be determined from successive measurements and the
next inspection interval appropriately established.
d. Where thickness measurements are obtained at CMLs, the minimum thickness at a CML can
be located by ultrasonic measurements or radiography.
e. The thinnest reading or an average of several measurement readings taken within the area of
an examination point shall be recorded and used to calculate the corrosion rates.
f. Examination points should be permanently recorded to allow repetitive measurements at the
same CMLs. Repeating measurements at the same location improves accuracy
of the calculated damage rate
\CML Selection - ANS - A decision on the type, number, and location of the CMLs should
consider results from previous inspections, the patterns
of corrosion and damage that are expected and the potential consequence of loss of
containment.
\Communication - ANS - ■. Personnel should obtain permission to work in the vicinity from
operating personnel responsible for the pressure vessel.
■ When inside a vessel, all persons working around the vessel should be informed that people
are working inside the vessel.
■ Individuals working inside the vessel should be informed when any work is going to be done
on the vessel's exterior
\Condition Monitoring Locations (CMLs) or Thickness Monitoring Locations (TMLs) - ANS -
Designated areas on pressure vessels where periodic examinations are conducted to monitor
the presence and rate damage.
\Consequence Assessment - ANS - The consequence of a release is dependent on type and
amount of process fluid contained in the equipment
\Contents of an Inspection Plan - ANS - Shall contain the inspection tasks and schedule
required to monitor damage mechanisms and assure the mechanical integrity of the equipment
■ Type(s) of inspection needed
■ Identify the next inspection date
■ Describe the extent and locations of inspection and NDE
■ Describe the surface cleaning requirements needed for inspection
■ Describe the requirements of any needed pressure test
■ Describe any required repairs
OPTIONAL
■ Describing the types of damage anticipated or experienced in the equipment
■ Defining the location of the damage
■ Defining any special access requirements
, \Controlled-deposition Weld Method (Notch Test Required) - ANS - a. Notch toughness testing,
such as that established by ASME Code Section VIII: Division 1, parts UG-84 and UCS-66, is
necessary when impact tests are required by the original code of construction or the
construction code applicable to the work planned.
b. The materials shall be limited to P-No. 1, P-No. 3, and P-No. 4 steels.
c. The welding shall be limited to the shielded-metal-arc welding (SMAW), gas-metal-arc
welding (GMAW), and gas-tungstenarc
welding (GTAW) processes.
d. A weld procedure specification shall be developed and qualified for each application. The
welding procedure shall define the
preheat temperature and interpass temperature and include the post heating temperature
requirement in f(8). The qualification
thickness for the test plates and repair grooves shall be in accordance with Table 8-1.
The test material for the welding procedure qualification shall be of the same material
specification (including specification type,
grade, class and condition of heat treatment) as the original material specification for the repair.
If the original material specification
is obsolete, the test material used should conform as much as possible to the material used for
construction, but in no case
shall the material be lower in strength or have a carbon content of more than 0.35%.
e. When impact tests are required by the construction code applicable to the work planned, the
PQR shall include sufficient tests
to determine if the toughness of the weld metal and the heat-affected zone of the base metal in
the as-welded condition is adequate
at the minimum design metal temperature (such as the criteria used in ASME Code Section VIII:
Division I, parts UG-84 and
UCS 66). If special hardness limits are necessary (for example, as set forth in NACE RP 0472
and MR 0103) for corrosion resistance,
the PQR shall include hardness
\Corroded Areas in Vessel Heads - ANS - The required thickness at corroded areas of
ellipsoidal and torispherical heads can be determined as follows:
a. In the knuckle region of the head, use the appropriate head formula in the construction code.
b. In the central portion of the head, use the hemi-spherical head formula in the construction
code. The central portion of the head
is defined as the center of the head with a diameter equal to 80% of the shell diameter.
\Corrosion rate - ANS - The rate of metal loss due to deteriotation with its environment
\Corrosion Rate Determination - ANS - ■ Suitable use of short-term versus long-term corrosion
rates shall be determined by the inspector.
■ Short-term corrosion rates are typically determined by the two most recent thickness readings
whereas long-term rates use the most recent reading and one taken earlier in the life of the
equipment.
