We have shared the API 5L Terms and Definitions – part 1 in the previous post, and we would like to share the API Terms and Definitions – part 2 here. Please see the following details of API Terms and Definitions .

23

instrument standardization

adjustment of a non-destructive inspection instrument to an arbitrary reference value

24

jointer

two lengths of pipe coupled or welded together by the manufacturer

25

lamination

internal metal separation that creates layers, generally parallel to the pipe surface

26

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 

27

LFW pipe 

EW pipe produced with a welding current frequency less than 70 kHz

28

LW pipe

tubular product having one longitudinal seam produced by laser welding

29

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].

30

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

31

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

32

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

33

pipe body

for SMLS pipe, the entire pipe; for welded pipe, the entire pipe, excluding the weld(s) and HAZ

34

pipe grade

designation of pipe strength level

NOTE Chemical composition and/or heat treatment condition of a pipe grade may differ.

35

pipe mill

firm, company or corporation that operates pipe-making facilities

36

processor

firm, company or corporation that operates facilities capable of heat treating pipe made by a pipe mill

NOTE Adapted from ISO 11960 [4].

37

product analysis

chemical analysis of the pipe, plate or strip

38

purchaser

party responsible for both the definition of requirements for a product order and for payment of that order

39

quenching and tempering

heat treatment consisting of quench hardening followed by tempering

40

SAW pipe

tubular product having one or two longitudinal seams, or one helical seam, produced by the submerged-arc

welding process

41

SAWH pipe

tubular product having one helical seam produced by the submerged-arc welding process

42

SAWL pipe

tubular product having one or two longitudinal seams produced by submerged-arc welding

43

SAW seam

longitudinal or helical seam produced by submerged-arc welding

44

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

45

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.

46

strip/plate end weld

weld that joins strip or plate ends together

47

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

48

tack weld

intermittent or continuous seam weld used to maintain the alignment of the abutting edges until the final seam weld is produced

49

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

50

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.

51

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.

52

undercut

groove melted into the parent metal adjacent to the weld toe and left unfilled by the deposited weld metal

53

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).

54

welded pipe

CW, COWH, COWL, EW, HFW, LFW, LW, SAWH or SAWL pipe

All above are the whole API erms 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 Terms and Definitions – part 2