abandoned-in-place - Answer Piping system, circuit, or contiguous sections there of meeting all of the following: has been decommissioned with no intention for further use; has been completely de-inventoried/purged of hydrocarbons/chemicals; and; is physically disconnected (e.g. air-gapped) from...
API 570 Definitions || Answered & Graded
abandoned-in-place - Answer Piping system, circuit, or contiguous sections there of meeting all of the
following: has been decommissioned with no intention for further use; has been completely de-
inventoried/purged of hydrocarbons/chemicals; and; is physically disconnected (e.g. air-gapped) from all
energy sources and/or other piping/equipment.
alloy material - Answer 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.
alteration - Answer 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 replacements in
kind.
applicable code - Answer 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/user or the piping engineer to be most appropriate for situation,
authorization - Answer Approval/agreement to perform a specific activity (e.g. piping repair) prior to
the activity being performed.
authorized inspection agency - Answer a) the inspection organization having 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/user of piping systems that are used only by the owner/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/user.
authorized piping inspector - Answer An employee of an owner/user organization or authorized
inspection agency who is qualified and certified by examination under the provisions of Section 4 and
, Annex A and is able to perform the functions specified in API 570 where contracted or directed to do so.
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.
auxiliary piping - Answer Instrument and machinery piping, typically small-bore secondary process
piping that can be isolated from primary piping systems a=but is normally not isolated. Examples include
flush lines, seal oil lines, analyzer lines, balance lines, buffer gas lines, drains, and vents.
condition monitoring locations (CMLs) - Answer Designated areas on piping systems where periodic
examination points and utilize multiple inspection techniques that are based on the predicted damage
mechanism(s). CMLs can be a single small area on a pipping system e.g. a 2-inch diameter spot or plane
through a section of a pipe where examination points exist in all four quadrants of the plane.
construction code - Answer The code or standard to which the piping system was originally built (e.g.
ASME B31.3).
contact point - Answer The locations at which a pipe or component rests on or against a support or
other object which may increase its susceptibility to external corrosion, fretting, wear or deformation
especially as a result of moisture and/or solids collecting at the interface of the pipe and supporting
member.
corrosion allowance - Answer Material thickness in excess of the minimum required thickness to allow
for metal loss (e.g. corrosion or erosion) during the service life of the piping component. Not used in
design strength calculations.
corrosion barrier - Answer The corrosion allowance in FRP equipment typically composed of an inner
surface and an interior layer which is specified as necessary to provide the best overall resistance to
chemical attack.
corrosion rate - Answer The rate of metal loss (e.g. reduction in thickness due to erosion,
erosion/corrosion or the chemical reaction(s) with the environment, etc.) from internal and/or external
damage mechanisms.
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