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leak testing

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Published: 01 June 2016
Fig. 8.6 Leak test of cold-spray-assisted fabrication of aluminum heat exchanger. (a) Before and (b) after the 500 h corrosion test. Source: Ref 8.20 More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... inspection. Casting defects including porosity, oxide films, inclusions, hot tears, metal penetration, and surface defects are reviewed. Liquid penetrant inspection, magnetic particle inspection, eddy current inspection, radiographic inspection, ultrasonic inspection, and leak testing for castings...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720411
EISBN: 978-1-62708-305-8
... of nondestructive inspection of weldments including visual inspection, liquid penetrant inspection, magnetic particle inspection, radiographic inspection, ultrasonic inspection, leak testing, and eddy current and electric current perturbation inspection. The chapter also describes the properties of brazing filler...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780193
EISBN: 978-1-62708-268-6
... inspection, fluorescent dye pressure testing, magnafluxing, helium sniffer leak testing Electrical/electronic component fails open/short Visual examination, multimeter testing, replacement with known good component Electrical connection fails open/short Visual examination, multimeter testing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270059
EISBN: 978-1-62708-301-0
... a reconstruction, producing a major environmental impact. The tank was first built in 1940, dismantled in 1986 leaving the old welds in place, and reconstructed in 1987, radiographed and leak tested. It was a case of brittle fracture in the base metal of the tank, alongside a weld. The investigation revealed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110563
EISBN: 978-1-62708-247-1
..., though they may not the most effective gettering materials [59] . Sometimes easy is better than best. A good overview of a variety hermeticity tests that are useful for MEMS is given in [60] . Direct hermeticity measurements of cavities (fine leak and gross leak) are typically done using standard...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780131
EISBN: 978-1-62708-268-6
... raisers in bonded joints or welded joints and provide a crack-initiation site. Leaks can reduce system efficiencies if the leak path is around a filter or other control feature. Leaks can result in test failures in tests where freedom from leakage is an acceptance characteristic. Leaks can...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270126
EISBN: 978-1-62708-301-0
... Abstract A test flight was cut short after a fire warning came on indicating a problem with one of the four engines on an aircraft. A visual examination following the precautionary landing revealed several burned hoses, a melted bolt, and fuel leaking from the base of the main burner. The fuel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930085
EISBN: 978-1-62708-359-1
.... Acoustic emission (AE) testing and leak testing are described separately, because they are somewhat different in character and are not used as widely. There are other NDE methods that have been omitted because they are very specialized. Applications A useful distinction can be made between those NDE...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000185
EISBN: 978-1-62708-312-6
... °F). After 25 cycles, the PM part is compared to a wrought welded 409Nb flange tested identically for signs of grain-boundary corrosion due to sensitization. The third test, known as the hot vibration leak test, is designed to determine the leak tightness of the flange-manifold assembly, both...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050293
EISBN: 978-1-62708-311-9
... and set to find the point at which coil replacement is necessary. After removal and repair of a coil, the coil should be tested for leaks and flow. Simple testing can be performed by placing a fitting to close one end of the coil and holding the coil in a tank of water with high air pressure applied...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030089
EISBN: 978-1-62708-282-2
.... Industrial case studies demonstrating the necessity for testing each galvanic couple in the environment for which it is intended are presented. The chapter also discusses various factors associated with stress-corrosion cracking in oil refineries. carbon steel weldments heat affected zone corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410009
EISBN: 978-1-62708-280-8
..., are leak-tested in machined condition. Both the product designer and the casting engineer prepare failure mode analyses. These analyses list all the potential ways either a design or the process can fail, impairing the product quality or consistency, and what preventive measures or controls need...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780093
EISBN: 978-1-62708-268-6
..., leak paths, and other conditions not readily apparent using visual or other assessment techniques. Techniques in this area include x-ray and n-ray radiography, dye penetrant inspection, fluorescent dye pressure testing, and magnafluxing. Mechanical and environmental approaches for evaluating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130539
EISBN: 978-1-62708-284-6
... of a thin oxide film. As an example, the 1948 ASM Metals Handbook gives the following table: Color Chart Another example of temper colors is shown in Fig. A5.2 . This example was developed to illustrate the effect of oxidation with furnace leaks. Oxidation of steel in the front of a continuous...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870101
EISBN: 978-1-62708-314-0
... that are subject to 350 °F (175 °C) autoclave cure cycles: The matrix has a tendency to crack, and with repeated thermal cycles it can develop leaks. Another consideration when specifying composite tools is that the surface is somewhat soft and easily scratched. If plies are cut directly on the tool...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930217
EISBN: 978-1-62708-359-1
... ). The tests were carried out on 50 mm (2 in.) thick BS1501-225-490B-LT50 steel samples manufactured by the British Steel Corporation. The steel was a carbon-manganese grade that had been silicon killed and microalloyed with aluminum and niobium. This grade was chosen because it is being used increasingly...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910427
EISBN: 978-1-62708-250-1
... Abstract Corrosion testing and monitoring are powerful tools in the fight to control corrosion. This chapter provides a general overview of three major categories of corrosion tests, namely laboratory tests, pilot-plant tests, and field tests. It begins with brief sections describing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820077
EISBN: 978-1-62708-339-3
... be performed to confirm the integrity of the argon cylinder and all hose connections. In this test, the weld button sample should be absolutely bright and shiny. Any cloudiness is an indication of contamination. It is necessary to check for leaks or to replace the cylinder. Fifth, it is important...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630211
EISBN: 978-1-62708-270-9
... an in-service leak. The leak occurred at the 6:00 orientation, in an area that had accumulated water and deposits. Samples collected from the deposits within the pit and surrounding area tested positive for high concentrations of bacteria. In cross section ( Fig. 5b ), the failure pit shows evidence...