We have shared the API 5L Terms and Definitions – part 1 in the previous post, and we would like to share the API 5L Terms and Definitions – part 2 here. Please see the following details of API 5L Specification terms and definitions.
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instrument standardization
adjustment of a non-destructive inspection instrument to an arbitrary reference value
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jointer
two lengths of pipe coupled or welded together by the manufacturer
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lamination
internal metal separation that creates layers, generally parallel to the pipe surface
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laser welding
process of forming a seam by using a laser-beam keyhole welding technique to produce melting and
coalescence of the edges to be welded, with or without preheating of the edges, wherein shielding is obtained
from an externally supplied gas or gas mixture
LFW pipe
EW pipe produced with a welding current frequency less than 70 kHz
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LW pipe
tubular product having one longitudinal seam produced by laser welding
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manufacturer
firm, company or corporation responsible for making and marking the product in accordance with the
requirements of this International Standard
NOTE 1 The manufacturer is, as applicable, a pipe mill, processor, maker of couplings or threader.
NOTE 2 Adapted from ISO 11961 [3].
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non-destructive inspection
inspection of pipe to reveal imperfections, using radiographic, ultrasonic or other methods specified in this
International Standard that do not involve disturbance, stressing or breaking of the materials
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normalizing formed
pipe delivery condition resulting from the forming process in which the final deformation is carried out within a
certain temperature range, leading to a material condition equivalent to that obtained after normalizing, such
that the specified mechanical properties would still be met in the event of any subsequent normalizing
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normalizing rolled
pipe delivery condition resulting from the rolling process in which the final deformation is carried out within a
certain temperature range, leading to a material condition equivalent to that obtained after normalizing, such
that the specified mechanical properties would still be met in the event of any subsequent normalizing
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pipe body
for SMLS pipe, the entire pipe; for welded pipe, the entire pipe, excluding the weld(s) and HAZ
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pipe grade
designation of pipe strength level
NOTE Chemical composition and/or heat treatment condition of a pipe grade may differ.
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pipe mill
firm, company or corporation that operates pipe-making facilities
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processor
firm, company or corporation that operates facilities capable of heat treating pipe made by a pipe mill
NOTE Adapted from ISO 11960 [4].
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product analysis
chemical analysis of the pipe, plate or strip
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purchaser
party responsible for both the definition of requirements for a product order and for payment of that order
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quenching and tempering
heat treatment consisting of quench hardening followed by tempering
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SAW pipe
tubular product having one or two longitudinal seams, or one helical seam, produced by the submerged-arc
welding process
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SAWH pipe
tubular product having one helical seam produced by the submerged-arc welding process
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SAWL pipe
tubular product having one or two longitudinal seams produced by submerged-arc welding
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SAW seam
longitudinal or helical seam produced by submerged-arc welding
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seamless pipe
SMLS pipe
pipe without a welded seam, produced by a hot-forming process, which can be followed by cold sizing or cold
finishing to produce the desired shape, dimensions and properties
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service condition
condition of use that is specified by the purchaser in the purchase order
NOTE In this International Standard, the terms “sour service” and “offshore service” are service conditions.
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strip/plate end weld
weld that joins strip or plate ends together
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submerged-arc welding
welding process that produces melting and coalescence of metals by heating them with an arc or arcs
between a bare metal consumable electrode or electrodes and the work, wherein the arc and molten metal
are shielded by a blanket of granular flux
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tack weld
intermittent or continuous seam weld used to maintain the alignment of the abutting edges until the final seam
weld is produced
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test unit
prescribed quantity of pipe that is made to the same specified outside diameter and specified wall thickness,
by the same pipe-manufacturing process, from the same heat and under the same pipe-manufacturing
conditions
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thermomechanical forming
hot-forming process for pipe, in which the final deformation is carried out in a certain temperature range,
leading to a material condition with certain properties that cannot be achieved or repeated by heat treatment
alone, and such deformation is followed by cooling, possibly with increased cooling rates, with or without
tempering, self-tempering included
CAUTION — Subsequent heating above 580 °C (1 075 °F) typically can lower the strength values.
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thermomechanical rolled
pipe delivery condition resulting from the hot-rolling process for strip or plate, in which the final deformation is
carried out in a certain temperature range, leading to a material condition with certain properties that cannot
be achieved or repeated by heat treatment alone, and such deformation is followed by cooling, possibly with
increased cooling rates, with or without tempering, self-tempering included
CAUTION — Subsequent heating above 580 °C (1 075 °F) typically can lower the strength values.
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undercut
groove melted into the parent metal adjacent to the weld toe and left unfilled by the deposited weld metal
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unless otherwise agreed
requirement that applies, unless an alternative requirement is agreed upon between the manufacturer and the
purchaser and specified in the purchase order
NOTE Associated, for example, with items covered by 7.2 b).
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welded pipe
CW, COWH, COWL, EW, HFW, LFW, LW, SAWH or SAWL pipe
All above are the whole API 5L Terms and Definitions. We can see there are so many different definitions for different kind of process or different kind of pipes.
You can also click to DOWNLOAD API 5L Terms and Definitions – part 2
API 5L Specification Line Pipe (1) - API 5L Terms and Definitions - part 2
