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Leakage

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001441
EISBN: 978-1-62708-220-4
... and the Joints had failed in a similar manner, a portion of the pipe within the socket having collapsed as shown in the illustration, the defect being revealed ultimately by the occurrence of leakage. Fig. 1 Failures of the foregoing type occur in the following manner: As can be seen on referring...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047263
EISBN: 978-1-62708-218-1
... Abstract An engine cylinder head failed after operating just 3.2 km (2 mi) because of coolant leakage through the exhaust port. Visual examination of the exhaust ports revealed a casting defect on the No. 7 exhaust-port wall. A 0.9x examination of an unpolished, unetched longitudinal section...
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Published: 01 June 2019
Fig. 2 Through-wall crack that produced leakage in AISI 304 stainless steel elbow (etched with water, HNO 3 and HCl, 10×). More
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Published: 01 June 2019
Fig. 1 Malleable iron elbow in which impingement corrosion caused leakage and failure at the bend. (a) Section through the elbow showing extent of corrosion and point of leakage. Regions A and B are locations of specimens shown in micrographs (b) and (c), respectively. (b) Micrograph More
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Published: 01 June 2019
Fig. 2 Photograph of the CIM showing no leakage following molten glass test. The original drain tube was removed and replaced with a short tube that was seal welded at the bottom. More
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Published: 01 December 2019
Fig. 1 Leakage prior to hydrotest at the site More
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Published: 01 December 1993
Fig. 2 SEM micrograph of thermowell tip, showing leakage paths More
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Published: 01 December 1993
Fig. 3 Staining (probable leakage area) on fitting of valve assembly More
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Published: 30 August 2021
Fig. 14 Predicted probability of initiation, first leakage, and rupture for the three frameworks. TWC, through-wall crack More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001469
EISBN: 978-1-62708-229-7
... for a sufficient number of cycles to produce an extensive system of fatigue cracks that resulted in partial disintegration of the ring. Microscopic examination of the material showed it to be a mild steel of satisfactory quality. The trouble was started by slight leakage, possibly resulting from a relaxation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001406
EISBN: 978-1-62708-229-7
... Abstract Caustic cracking is the term used to describe one of the forms in which stress-corrosion cracking manifests itself in carbon steels. In the present study, persistent leakage occurred after ten weeks of service from tube expansions in the steam and mud drum of a two-drum D type boiler...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046512
EISBN: 978-1-62708-234-1
... Abstract Immediately after installation, leakage was observed at the mounting surface of several rebuilt hydraulic actuators that had been in storage for up to three years. At each joint, there was an aluminum alloy spacer and a vellum gasket. The mounting flanges of the steel actuators had...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0091402
EISBN: 978-1-62708-234-1
... Abstract Leakage was detected in a malleable iron elbow (ASTM A 47, grade 35018) after only three months in service. Life expectancy for the elbow was 12 to 24 months. The piping alternately supplied steam and cooling water to a tire-curing press. The supply line and elbow were subjected to 14...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001456
EISBN: 978-1-62708-229-7
... Abstract An unusual type of defect was discovered during hydraulic testing of a water-tube boiler after repairs to the superheater tubes following erosion from soot-blowers. When the pressure reached 700 psi, slight leakage was found to be taking place from one of the superheater tubes...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001329
EISBN: 978-1-62708-215-0
... Abstract Various aluminum bronze valves and fittings on the essential cooling water system at a nuclear plant were found to be leaking. The leakage was limited to small-bore socket-welded components. Four specimens were examined: three castings (an ASME SB-148 CA 952 elbow from a small-bore...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001457
EISBN: 978-1-62708-219-8
... it to be an austenitic nickel-chromium stainless steel, stabilized by titanium and of the free machining type. Multiple transgranular cracking characteristic of failure from stress-corrosion cracking, was present to an extensive degree. It was considered probable that there had been slight leakage of water from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001403
EISBN: 978-1-62708-220-4
... Abstract A process vessel heating coil, consisting of several 3 ft diam turns, was supplied with steam at 400 psi and a temperature of 343 deg C (650 deg F). At bi-weekly intervals well water was introduced to effect rapid cooling of the contents. After about eight months, leakage developed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001422
EISBN: 978-1-62708-229-7
... Abstract During a hydraulic test on one of the boilers in a range, leakage occurred from the lower surface of a horizontal S bend in the main steam pipe between the drum connector box and the junction valve. The pipe in question was 15 in. bore and had been in service for about 50 years...
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Published: 30 August 2021
Fig. 76 Close-up view of outer surface of a failed water-wall tube showing a circumferential transverse crack from where the leakage started More
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Published: 01 June 2019
Fig. 3 Macroview of pipe wall section at weld, showing result of biologically influenced corrosion. Void is included entirely within parent austenite. Leakage occurred. 16×. More