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API 570 Exam Elaborations – Questions And Answers
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API 570 Exam Elaborations – Questions And AnswersWhich of the following is covered by API 570 Right Ans - Inspection, repair,
alteration, and rerating of in-service piping
API 570 was developed for use by which of the following? Right Ans - The
petrochemical industries, Where practical for any piping system,
Organizations which have access to an authorized inspections agency, a repair
organization, and
technically qualified engineers
Is it permissible to substitute the requirements of API 570 for the
construction code requirements prior to the piping system being placed in
service Right Ans - no
Which of the following services is not included under the requirements of API
570 Right Ans - Water, steam, boiler feed water, and category D fluid
service as defined in ASME B31.3
Which of the following types of service or classes of piping are not optional or
excluded from coverage under the requirements of API 570 Right Ans -
Catalyst Lines
Who is responsible for meeting the requirements of API 570 Right Ans -
The Owner-User
To whom is the piping engineer responsible in regards to design, engineering
review or analysis of piping systems Right Ans - The Owner-User
To whom is the repair organization responsible Right Ans - The Owner-
User
To whom is the inspector responsible under the requirements of API 570
Right Ans - The Owner-User
Under the requirements of API 570 what responsibilities do personnel other
than the inspector, Engineer and the repair organization have? Right Ans -
,Other personnel are responsible for making the inspector and engineer aware
of any unusual conditions.
Which of the following exercises control over the piping inspection program
and inspection frequencies in accordance with API 570 Right Ans - The
Owner-User
Who controls the maintenance activities related to repair, alterations and
rerating? Right Ans - The Owner-User
Which of the following is not a requirement for being qualified as an API 570
inspector. Right Ans - Six years of experience in inspecting in service piping
systems.
Which of the following is required prior to performing any inspection work on
a piping system? Right Ans - Appropriate safety precautions, Permission
from operations, PPE as required must be worn and inspection equipment
must meet requirements of the facility for
electrical equipment, where applicable
Prior to making an inspection of a piping system, the inspector should:
Right Ans - Review the past inspection results and the repair history of the
system.
Injection points, deadlegs, and soil to air interfaces all require: Right Ans -
Specific attention as determined form past inspections.
Injection point circuits should extend how far upstream? Right Ans - The
greater of 12" or three pipe diameters.
How far downstream should an injection point circuit extend? Right Ans -
The lessor of the second change in flow direction or 25 feet beyond the first
change in flow direction.
Where should TML's be established on injection point circuits? Right Ans -
At the upstream and downstream limits of the injection point circuit, At the
point of impingement of the injected fluid, At intermediate locations along
longer straight runs.
,Why are injection points more of a concern than other areas of the piping
system? Right Ans - Due to accelerated or localized corrosion due to
normal or abnormal operating conditions.
Is it permissible to treat an injection point as a separate circuit from the
piping system in which in was installed ? Right Ans - Yes
Which of the following are the preferred methods of inspecting injection pint
CML's Right Ans - RT or UT to establish the minimum thickness.
During periodic scheduled inspections, which of the following is
recommended by API Right Ans - Extensive inspection of the area 12"
above and 10 pipe diameters downstream of the injection point in addition to
thickness readings at all TMLs
The corrosion rate in deadlegs is normally: Right Ans - Different from the
adjacent active pipe.
When taking thickness readings on deadlegs, thickness reading should be
taken at: Right Ans - Along the entire length of the deadleg.
Corrosion may occur at high points in the deadleg in hot systems due to:
Right Ans - Convective currents.
External inspection of insulated piping systems susceptible to CUI should
include which of the following? Right Ans - The integrity of the insulation
system, Signs of CUI, Sources of moisture.
Which of the following are the most common forms of corrosion under
insulation? Right Ans - Localized corrosion of carbon steels and stress
corrosion cracking of austenitic stainless steels.
which of the following examples of piping systems would be least susceptible
to CUI Right Ans - Carbon steel piping systems above 350 degrees F.
While inspecting a piping system, you notice that the insulation jacketing is
damaged and that the caulking at the joint is damaged and the insulation is
, damp. What should you be concerned about? Right Ans - Moisture could
enter the insulation as cause corrosion of the piping system.
Which of the following would be susceptible to CUI on a carbon steel line
operating at 300 degrees F? Right Ans - Areas of the system which are in
intermittent service, Areas where deadlegs and attachments operate at lower
temperatures, Areas of the line which may have steam tracing.
What would you suspect if while inspecting an insulated line you noticed a
bulged area? Right Ans - Corrosion products have built up, thus the bulging
insulation.
When completing a UT thickness measurement on an insulated piping system,
the plugs should be: Right Ans - Reinsulated and sealed immediately
If significant corrosion is noted on an air to soil interface, what action should
be taken? Right Ans - The line should be partially excavated to determine if
the corrosion is present only at the air soil interface or is common to the
entire system.
Buried piping without adequate cathodic protection requires: Right Ans -
Requires that all air to soil interface be included in the scheduled external
inspection.
When is it necessary to excavate the air to soil interface on piping systems
with satisfactory cathodic protection? Right Ans - When there is evidence
of coating or wrapping damage.
While inspecting 20 year old piping system without cathodic protection, you
notice that the caulking around the pipe at the concrete has deteriorated.
What action would you recommend? Right Ans - Excavate the area to
inspect for corrosion before resealing the joint.
When buried pipe which is uncoated at the grade level is discovered, how far
should the line be excavated? Right Ans - 6 to 12 inches should be
uncovered to look for hidden damage.
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