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Terms, definitions, symbols and abbreviations
1.1 Terms and definitions
This International Standard adopts the terms and definitions listed in the heat treatment operation section of ASTM A941 and below.
1.1.1 accessory material
Seamless standard casing or oil pipe, seamless thick-walled pipe or mechanical pipe, bar material or hot forged material used in the manufacture of accessories.
1.1.2 API threads
Thread specified in API Spec 5B.
The quantity of steel pipes loaded on the first wagon delivered by the steel pipe manufacturer.
The pipe that extends from the ground surface into the well to line the well wall.
1.1.5 Casing and tubing accessory casing and tubing accessory
A section of pipe used in the pipe string to make the pipe string have complete mechanical and pressure properties and to help complete other tasks. For example: conversion joints, reducing short joints, short joints, outlet pipe couplings, wear-resistant joints, etc.
Note: The appendix does not include other pipe products defined in this International Standard or other ISO (API) specifications.
Generic term for threaded connection of pipe components.
1.1.7 controlled cooling
Cool the tube from high temperature according to a predetermined method to avoid hardening, cracking, internal damage and achieve the desired microstructure or mechanical properties.
A cylindrical barrel with internal thread for connecting two threaded pipes.
1.1.9 Coupling semi-finished products coupling blank
Used for the production of single coupling unthreaded material.
1.1.10 Coupling stock
Used to produce seamless thick-walled pipes or mechanical pipes for semi-finished couplings.
Refers to a defect that is large enough to be a basis for adjudgement according to the provisions of this code.
1.1.12 electric-welded pipe
A tube with a longitudinal weld seam is formed by heating and pressure welding the edges of the steel plate through resistance or electric induction heating, without the need for filler metal.
1.1.13 handling tight
It is tight enough that it cannot be removed without using a pipe wrench.
1.1.14 furnace heat
A batch of charge, metal produced in one smelting cycle.
1.1.15 heat analysis
A chemical analysis sample report provided by a metal manufacturer.
The discontinuities on the wall thickness of the product or on the surface of the product inspected by the NDE inspection method.
Measurement, test, inspection test, or other method of comparing products with usage requirements.
1.1.18 inspection lot inspection lot
The number of products specified as a certain inspection unit.
1.1.19 Inspection lot sample inspection lot sample
One or more products selected from the inspection lot on behalf of the inspection lot.
1.1.20 inspection lot size inspection lot size
The product quantity of an inspection lot.
1.1.21 interrupted quenching interrupted quenching
When the temperature of the tube itself is significantly higher than the quenching medium, the tube being cooled is taken out of the quenching medium.
1.1.22 Specification code 1 label 1
When ordering the tube, the dimensionless code of the specification or specified outer diameter.
1.1.23 Specification code 2 label 2
When ordering a tube, the dimensionless unit of weight per unit length.
1.1.24 root length
A section of the pipe, which can be flat-end, threaded or with thread and coupling, and its range shall meet the length range requirements of Table C.30 or Table E.30 of this standard.
1.1.25 Linear imperfection linear imperfection
Linear defects include seam, lap, crack, plug score, cut, and gouge, but are not limited to these defects.
Depending on the context, it can be one or several of the following situations: pipe manufacturer, heat treatment plant, thread processing plant, coupling manufacturer, pup joint manufacturer, or accessory manufacturer.
1.1.27 Non-linear imperfection
Non-linear defects include pits and round bottom indentations, but are not limited to these defects.
Refers to the general term for casing, tubing, plain-end casing liner and pup joints.
1.1.29 pipe mill
A manufacturer, company or group company that operates and manages the production of pipe facilities.
1.1.30 plain-end casing liner
Usually have a wall thickness greater than the specified wall thickness of J55, provided with no threaded casing.
1.1.31 Heat treatment plant processor
A manufacturer, company or group company that can heat-treat the pipes produced by the pipe manufacturer.
Refers to single or batch pipes, couplings, accessories, coupling blanks and coupling semi-finished products.
1.1.33 pup joint
A casing, tubing and flat-end casing liner shorter than the length range 1.
1.1.34 pup-joint material
Standard casing or tubing, thick-walled pipe or mechanical pipe, bar material used in the manufacture of short sections.
The party responsible for requesting and paying for product orders.
1.1.36 quench crack
Cracks caused by stress during the transformation of austenite to martensite in steel.
Note: This transformation is a process accompanied by an increase in volume.
1.1.37 seamless pipe
The rolled steel pipe products have no welds.
Note: It is processed by steel in a hot state. If necessary, cold processing, heat treatment or a combination of these processing methods can be used to produce the desired shape, size and performance.
1.1.38 Plate with skelp
Hot-rolled steel strip used in the manufacture of electric welded pipes.
1.1.39 Special end-finish processing special end-finish
Threads whose type and characteristics, production specifications, dimensions, screw connections, and performance are beyond the scope of this international standard.
1.1.40 thread protector
Caps or bushings used to protect threads and seal during loading and unloading, handling and storage.
Put into the well as a pipe for liquid production or liquid injection.
1.1.42 upper critical temperature
Ar₃ refers to the critical temperature at which austenite begins to transform into ferrite during cooling.
1.2 Symbols and abbreviations
BC partial trapezoidal threaded casing connection
Cᵥ Charpy V-notch minimum absorbed work
CVN Charpy V-notch
D Specified outer diameter of pipe
D Calculated inner diameter
EMI electromagnetic inspection
EU outer thickened tubing connection
EW welding process
FBH flat bottom hole
Brinell hardness of HBW with tungsten carbide balls
HRC C scale Rockwell hardness
ID inner diameter
IJ integral tubing connection
K elongation calculation constant
LC long round threaded sleeve connection
N (heat treatment process) full length normalizing
N&T Normalizing + Tempering
NDE non-destructive testing
NU non-thickening tubing connection
OD outer diameter
PSL product technical requirement level
Q quenching + tempering
S Seamless process (when not referring to the chemical element sulfur)
Sc ANSI-NACE TM0177: 1996 Method B test minimum qualified value
SCC special clearance coupling
SSC Sulfide Stress Cracking
STC short round threaded sleeve connection
t Specified wall thickness
T&C with thread and coupling
USC U.S. customary unit
UT ultrasonic inspection
W Specified outer diameter of API threaded couplings other than special clearance couplings
Wc Specified outer diameter of Wc API thread special clearance coupling
XC Direct Connect Casing Connector
YSmax specified maximum yield strength
YSmin specified minimum yield strength