Fatigue Crack

A fracture starting from a nucleus where there is an abnormal concentration of cyclic stress and propagating through the metal. The surface is smooth and frequently shows concentric (sea shell) type markings with a nucleus as a center. Fatigue cracks which penetrate the OD surface of the tube body are incorrectly referred to as "pinholes".

See also: FSC , Reduction of Area , EOR , VRT , BRNG

Oil and Gas Field Dictionary INDEX:

List of Terms: Terms beginning with "A", Page 1

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A: Page 1 of 1.

AAL	Abandon	Abnormal BHP
Abnormal Opera...	Absolute Press...	Absolute Volume
Absorption	AC	Accumulator
Accumulator Pr...	ACE	Acid
Acid Brittlene...	Acid Rain	Acidizing
ACL	Acoustic Log	Acreage
Actuation Test	Additive	Adjustable Cho...
Adsorption	ADT	Aeration
Aerosol	AFE	Aggregate
AIL	Air Gun	AIT
AKO	ALARP	Alcohols
Alkalinity	Ammonia	AMS
Anaerobic	Anchor	Angle of Incli...
Angle of Twist	ANHYD	Anhydrous
Annealing	Annular Preven...	Annular Veloci...
Annulus	Anti-Foam	Anticline
AOF	API Gravity	Apparent Visco...
Appraisal Well	Approach	APS
Aquifier	ARG	ARI
Aromatics	Artificial Lift	ASI
ASL	Asphalt	Associated Gas
ASSY	AST	ASV
AT	Atmospheric Pr...	ATS
ATT	Attapulgite Cl...	Austenite
AZI	Azimuth

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Fatigue Crack

Oil and Gas Field Dictionary INDEX:

List of Terms: Terms beginning with "A", Page 1

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