Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
N (Heat-Treat Process)
Definition(s)
N (Heat-Treat Process)
Full-body, full-length normalised. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsCS
Definition(s)
CS
Coupling stock. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsCS
Control station. Source: ISO 13702:2015, Petroleum and natural gas industries — Control and mitigation of fires and explosions on offshore production installations — Requirements and guidelines, Second Edition, August 2015. Global StandardsUpper Critical Temperature (Ar3)
Definition(s)
Upper Critical Temperature (Ar3)
Temperature at which austenite begins to transform to ferrite during cooling. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsStandardised Test Block
Definition(s)
Standardised Test Block
Test block, certified to a mean hardness number, used for the verification of the performance of hardness testing machines. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsSpecial End-Finish
Definition(s)
Special End-Finish
Threads with thread form and features, manufacturing specifications, dimensions, connection make-up and performance properties which are beyond the scope of this Standard. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsQuench Crack
Definition(s)
Quench Crack
Crack in steel resulting from stresses produced during the transformation from austenite to martensite. NOTE This transformation is accompanied by an increase in volume. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsQuench Crack
Crack in steel resulting from stresses produced during the transformation from austenite to martensite. NOTE This transformation is accompanied by an increase in volume. [ISO 11960:2004, definition 4.1.36]. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsPup-Joint Material
Definition(s)
Pup-Joint Material
Casing or tubing, or thick-wall tubes or mechanical tubes, or bar stock used for the manufacture of pup joints. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsProduct Test Block
Definition(s)
Product Test Block
Test block removed from the product, the tensile test specimen or through-wall hardness test ring. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsProcessor
Definition(s)
Processor
Firm, company or corporation that operates facilities capable of heat-treating products made by a pipe mill. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsPlain-End Pipe
Definition(s)
Plain-End Pipe
Pipe, either upset or non-upset, furnished without threads. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsPipe Mill
Definition(s)
Pipe Mill
Firm, company or corporation that operates pipe-making facilities. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsNon-Linear Imperfection
Definition(s)
Non-Linear Imperfection
Imperfection which includes, but is not limited to, pits and round-bottom die stamping. NOTE See API Std 5T1. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsNon-Linear Imperfection
Imperfection that includes, but is not limited to, pits. See API Std 5T1. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsInterrupted Quenching
Definition(s)
Interrupted Quenching
Quenching in which the product being quenched is removed from the quenching medium while the product is at a temperature substantially higher than that of the quenching medium. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsInspection Lot Size
Definition(s)
Inspection Lot Size
Number of units of product in an inspection lot. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsInspection Lot Sample
Definition(s)
Inspection Lot Sample
One or more units of product selected from an inspection lot to represent that inspection lot. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsInspection Lot Or Lot
Definition(s)
Inspection Lot Or Lot
Definite quantity of product manufactured under conditions that are considered uniform for the attribute to be inspected. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsHeat Analysis
Definition(s)
Heat Analysis
Chemical analysis representative of a heat as reported by the metal producer. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsHeat Analysis
Chemical analysis representative of a heat as reported by the metal producer. [ISO 11960:2004, definition 4.1.15]. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsHeat
Definition(s)
HEAT
Cast lot material originating from a final melt.- NOTE: For remelted alloys, a heat is defined as the raw material originating from a single remelted ingot.