Any metallic material (including welding filler materials) that contains alloying elements, such as chromium, nickel, or molybdenum, which are intentionally added to enhance mechanical or physical properties and/or corrosion
resistance. Alloys may be ferrous or non-ferrous based.
NOTE Carbon st...
API 570 Definitions ANSWERED
Any metallic material (including welding filler materials) that contains alloying elements,
such as chromium, nickel, or molybdenum, which are intentionally added to enhance
mechanical or physical properties and/or corrosion
resistance. Alloys may be ferrous or non-ferrous based.
NOTE Carbon steels are not considered one for purposes of this code. - Correct
Answer alloy material
A physical change in any component that has design implications affecting the pressure
containing capability or
flexibility of a piping system beyond the scope of its original design. The following are
not considered alterations:
comparable or duplicate replacements and the addition of small-bore attachments that
do not require reinforcement
or additional support. - Correct Answer Alteration
The code, code section, or other recognized and generally accepted engineering
standard or practice to which the
piping system was built or which is deemed by the owner or user or the piping engineer
to be most appropriate for the
situation, including but not limited to the latest edition of ASME B31.3. - Correct Answer
applicable code
Approval/agreement to perform a specific activity (e.g. repair) prior to the activity being
performed. - Correct Answer Authorization
Defined as any of the following:
a) the inspection organization of the jurisdiction in which the piping system is used,
b) the inspection organization of an insurance company that is licensed or registered to
write insurance for piping systems,
c) an owner or user of piping systems who maintains an inspection organization for
activities relating only to his equipment and not for piping systems intended for sale or
resale,
d) an independent inspection organization employed by or under contract to the owner
or user of piping systems that are used only by the owner or user and not for sale or
resale,
e) an independent inspection organization licensed or recognized by the jurisdiction in
which the piping system is used and employed by or under contract to the owner or
user. - Correct Answer Authorized Inspection Agency
An employee of an authorized inspection agency who is qualified and certified to
perform the functions specified in API 570. An NDE examiner is not required to be an
authorized piping inspector. Whenever the term inspector is used in API 570, it refers to
an authorized piping inspector. - Correct Answer authorized piping inspector
, Instrument and machinery piping, typically small-bore secondary process piping that
can be isolated from primary piping systems. Examples include flush lines, seal oil lines,
analyzer lines, balance lines, buffer gas lines, drains, and vents. - Correct Answer
auxiliary piping
Designated areas on piping systems where periodic examinations are conducted.
NOTE Previously, CMLs were referred to as "thickness monitoring locations" (TMLs).
CMLs may contain one or more examination points. CMLs can be a plane through a
section of piping or a nozzle or an area where CMLs are located on a piping circuit. -
Correct Answer CMLs
The code or standard to which the piping system was originally built (i.e. ASME B31.3).
- Correct Answer construction code
Check valves in piping systems that have been identified as vital to process safety. -
Correct Answer critical check valves
Any type of deterioration encountered in the refining and chemical process industry that
can result in flaws/defects that can affect the integrity of piping (e.g. corrosion, cracking,
erosion, dents, and other mechanical, physical or chemical impacts). - Correct Answer
damage mechanism
Components of a piping system that normally have no significant flow. Some examples
include blanked branches, lines with normally closed block valves, lines with one end
blanked, pressurized dummy support legs, stagnant control valve bypass piping, spare
pump piping, level bridles, relief valve inlet and outlet header piping, pump trimbypass
lines, high-point vents, sample points, drains, bleeders, and instrument connections. -
Correct Answer deadlegs
An imperfection of a type or magnitude exceeding the acceptable criteria. - Correct
Answer Defect
The pressure at the most severe condition of coincident internal or external pressure
and temperature (minimum or maximum) expected during service. - Correct Answer
design pressure
The temperature at which, under the coincident pressure, the greatest thickness or
highest component rating is required. It is the same as the design temperature defined
in ASME B31.3 and other code sections and is subject to the same rules relating to
allowances for variations of pressure or temperature or both. - Correct Answer design
temperature of a piping system component
An area within a CML defined by a circle having a diameter not greater than 2 in. (50
mm) for a pipe diameter not exceeding 10 in. (250 mm), or not greater than 3 in. (75
mm) for larger lines and vessels. CMLs may contain multiple test points.
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