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leak detection

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003228
EISBN: 978-1-62708-199-3
... Abstract This article reviews nondestructive testing (NDT) and inspection techniques, namely liquid penetrant, magnetic particle, ultrasonics, X-ray, eddy current, visual and radiography that are commonly used to detect and evaluate flaws or leaks in an engineering system. This article compares...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003229
EISBN: 978-1-62708-199-3
... leak-testing methods Gas systems at pressure Direct sensing by: Acoustic methods Bubble testing Flow detection Gas detection by: Smell Chemical reaction Halogen gas Sulfur hexafluoride Combustible gas Thermal-conductivity gages Infrared gas analyzers Mass...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006336
EISBN: 978-1-62708-179-5
... Magnetic-particle inspection Eddy-current inspection Radiographic inspection Ultrasonic inspection Resonant testing Leak testing The first two methods are the most common inspection methods used in the cast iron industry. A visual inspection can quickly and inexpensively detect...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006438
EISBN: 978-1-62708-190-0
... warning of degradation prior to catastrophic failure Piping systems, rotating machinery Leak detection—acoustic, pressure drop, or gas sniffing Most certification programs deal with helium or other gas sniffing using mass spectrometer or other instrument. Pipes, vessels, heat exchanger tubes, tanks...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003845
EISBN: 978-1-62708-183-2
... on these documents, as well as papers describing leak detection systems for FRP equipment, can be found in the Selected References of this article. Resins and Their Resistance to Various Environments Corrosion-resistant thermosetting resins can be categorized by families of resins and their associated types...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004121
EISBN: 978-1-62708-184-9
... steam long distances. Steam leaked under the insulation may condense and wet the insulation, leading to additional corrosion. Corrosion under insulation is very hard to detect ( Ref 7 , 8 ). While corrosion can, and does, occur on the outside of steam lines, it is much more likely to occur...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006462
EISBN: 978-1-62708-190-0
... amounts of mercaptan to create the “rotten egg smell” associated with a gas leak, this industry has essentially enlisted the general population as structural health monitors for their vast network of distribution pipes and all the equipment to which this gas is supplied. This leak detection, along...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005341
EISBN: 978-1-62708-187-0
... Abstract The commonly used nondestructive testing of cast products include liquid penetrant inspection, radiographic inspection, fluoroscopic inspection and automated defect recognition, ultrasonic inspection, eddy current inspection, process-controlled resonant testing (PCRT), leak test...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006822
EISBN: 978-1-62708-329-4
... with the joint centerline. Fracture at the origin was consistent with ductile overload, and no evidence of any progressive or in-service cracking was observed. The incomplete cross-weld penetration or porosity did not extend to the pipe outer surface; consequently, external inspection and leak detection would...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001738
EISBN: 978-1-62708-178-8
.... This will ensure that residual contaminants adsorbed on the interior walls of the sample bottle and other associated plumbing have been removed or reduced below analytical detection limits. Samples are normally analyzed the same day they are taken to minimize air contamination due to integral sample bottle leak...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005758
EISBN: 978-1-62708-171-9
... the following: Hydrogen is a very flammable gas. Hydrogen gas in the air is extremely flammable in nearly any concentration. Any leak, no matter how small, must be addressed immediately. A hydrogen flame is virtually invisible either in an explosion or a deflagration. A flame from a leaky valve or fitting...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001478
EISBN: 978-1-62708-173-3
..., and note any change in trapped gas pressure over a period of time (corrections for temperature and barometric pressure may be necessary). Pressure testing with helium is frequently preferred, because of the relative ease of finding very minute leaks. A mass spectrometer is used to detect helium...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003237
EISBN: 978-1-62708-199-3
... and loose particles Detecting and monitoring leaks, cavitation, and flow Monitoring chemical reactions, including corrosion processes, liquid-solid transformations, and phase transformations When these same processes of impact, friction, flow, and so on, occur during a typical AE inspection...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004152
EISBN: 978-1-62708-184-9
... the sites of air and cooling water inleakage ( Ref 34 , 35 ), with helium leak detection being the best. Also, the presence of cooling water leaks can be detected by monitoring the condensate for sodium or cation conductivity ( Ref 11 ). Types of Condensers Condensers may be cooled by water, air...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001473
EISBN: 978-1-62708-173-3
.... Environmental issues also have provided a stimulus to NDE activity. The inspection of storage tanks at refineries, where corrosion needs to be detected before leaks develop, is a good example. As already noted, the performance capability required of NDE during the manufacturing process can be quite...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002381
EISBN: 978-1-62708-193-1
... that the damage will be obvious (e.g., readily apparent leak or failed component; fail safety). Repair when damage is discovered. If the above cannot be shown, calculate permissible crack size. Establish crack size that can be detected reliably. Calculate time for crack growth. Implement periodic...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006454
EISBN: 978-1-62708-190-0
... parts and loose particles ( Ref 12 ) Detecting and monitoring leaks, cavitation, and flow ( Ref 12 , 13 ) Monitoring chemical reactions, including corrosion processes, liquid-solid transformations, and phase transformations ( Ref 14 ) When processes of impact, friction, flow, and so...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003657
EISBN: 978-1-62708-182-5
... will leak through it, generating a small sound, thereby allowing for its detection. If there are several holes in the tire, each one will leak air, allowing for their detection. The higher the pressure in the tire, the stronger the sound produced by the hole. Continuing with the analogy, we know...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003659
EISBN: 978-1-62708-182-5
... the correct type of probe for the application. Cylindrical probes or wires may not detect corrosion of a pipe wall from a thin film of liquid on the pipe wall resulting from annular two-phase flow. A flush-mounted probe must be used in this case. Another major problem is finding leak-tight insulators...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006814
EISBN: 978-1-62708-329-4
... testing should be used to detect such cracking, and the part rejected or repaired before being placed into service. Other portions of this Volume that deal with manufacturing operations discuss this type of failure. When the first type of failure occurs (that is, when there is a manufacturing-related...