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Hot water heating

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001701
EISBN: 978-1-62708-219-8
... Abstract A closed-loop hot water heating system at a museum in South Carolina was the subject of failure evaluation. The system consisted of plain carbon steel pipes (Schedule 40) made of ASTM A 106 or A 53 (ERW or seamless). The supply and return lines were made of the same materials...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001180
EISBN: 978-1-62708-219-8
... with oxygen to form phosphorus pentoxide. Hard soldering in turn prevented the formation of cuprous oxide, and hydrogen embrittlement occurred. Hot water heating Piping Phosphorus-deoxidized copper Transgranular fracture Stress-corrosion cracking The site of the damage in the T-piece from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001234
EISBN: 978-1-62708-232-7
... that localized turbulence is obviated. Degassing and cleansing of the water also would reduce the danger of erosion particularly in the case of softened water, which takes up oxygen and carbon dioxide very readily thus becoming particularly aggressive. Corrosion products Hot water heating Pipe Soldered...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048361
EISBN: 978-1-62708-234-1
... Abstract Several failures occurred in 64-mm schedule 80 type 304 stainless steel (ASME SA-312, grade TP304) piping in a steam-plant heat-exchanger system near tee fittings at which cool water returning from the heat exchanger was combined with hot water from a bypass. Various portions...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001093
EISBN: 978-1-62708-214-3
... following hot heading and prior to the production run. The process chart for hot heading was changed from water quenching to air cooling following the forming operation. Water quenching 8740 UNS G87400 Heat treating-related failures Intergranular fracture Background A heat-treated, cadmium...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001700
EISBN: 978-1-62708-229-7
... Abstract A straight-tube cooler type heat exchanger had been in service for about ten years serving a coal pulverizer in Georgia. Non-potable cooling water from a local lake passed through the inner surfaces of the copper tubing and was cooling the hot oil that surrounded the outer diametral...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001773
EISBN: 978-1-62708-241-9
..., in particular in the V-shape junction between Plates A and B. The reported temperature for the hot vapors entering the top of the spiral element was 135°C (275°F), sufficient to cause deposit accumulation on the cooling water side in stagnant areas of the spiral element. Furthermore, the junction between...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001048
EISBN: 978-1-62708-214-3
... proper selection of a tube material that is inherently resistant to chloride SCC. Duplex stainless steel (such as UNS S31500 and S31803) heat exchanger tubes have performed successfully in hot chloride-bearing waters without SCC ( Ref 2 ). Therefore, duplex stainless steel S31803 was recommended...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001410
EISBN: 978-1-62708-220-4
... of components by the hot stamping process. Microscopic examination indicated failure from dezincification. The fact that the screwed end was not affected indicated that the trouble was not caused by the condensate, which flowed through the elbow, but originated from the water heated in the vessel. The helical...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001791
EISBN: 978-1-62708-241-9
... and pearlite Fig. 4 Sample 2 (region of fracture/not severe oxidation). Outer wall of the side which was not exposed to hot gas flux. Microstructure: ferrite and pearlite Fig. 5 Sample 2: inner wall, opposed to the fractured side, exposed to the hot gas flux after fracture. Microstructure...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001817
EISBN: 978-1-62708-180-1
... with elevated temperature—for example, at the hot-test parts of heat-exchanger surfaces—the nodule that is formed is hard and is difficult to remove until it has attained considerable size. The temperature may be sufficient to evaporate some of the liquid within the nodule; the corrosive action then becomes...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001274
EISBN: 978-1-62708-215-0
... Abstract A laminated-paper microwave food tray collapsed with hot food in it. Microscopic examination of the failed tray revealed no structural or material defects. Five additional trays of like construction were also tested to determine the conditions necessary to simulate the permanent...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090881
EISBN: 978-1-62708-229-7
... power generation Steam generators Tubes Inconel 600 UNS N06600 Intergranular fracture Power plants use steam generators, which have hot reactor coolant water flowing through the generators. One power plant experienced a steam generator tube rupture in the early 1990s. Metallurgical evaluation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091533
EISBN: 978-1-62708-217-4
... the end of the strap ( Fig. 1a ) and was returned to the manufacturer to determine the cause of fracture. Fig. 1 Heat-resistant alloy clamp for securing the hot air ducting system on fighter aircraft that failed by stress corrosion. (a) Configuration and dimensions (given in inches). (b) Section...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091640
EISBN: 978-1-62708-229-7
... plant, failed after approximately four months of service, during which it had been exposed to high-purity water at approximately 175 °C (350 °F) and 11 MPa (1600 psi). The valve had been subjected to 25 hot cycles to 300 °C (575 °F) and 12.6 MPa (1825 psi) by the manufacturer and to occasional operating...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001374
EISBN: 978-1-62708-215-0
... Abstract Two hot water reheat coil valves from a heating/ventilating/air-conditioning system failed in service. The values, a 353 copper alloy 19 mm (3/4 in.) valve and a 360 copper alloy 13 mm (1/2 in.) valve, had been failing at an increasing rate. The failures were confined to the stems...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006813
EISBN: 978-1-62708-329-4
... that follows an increase in temperature. The features characteristic of crevice-corrosion attack are: Nodules will generally form on the corroded surfaces. The nodules will be hard if formed on a hot surface, but may be softer if formed on a cold surface. The composition of the nodules varies from...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001321
EISBN: 978-1-62708-215-0
... was mainly composed of Fe 3 O 4 (magnetite). Some of the scraped products (about 1 g or 0.04 oz.) was leached wit about 25 ml of hot double distilled water. The pH of this water extract was then measured. An increase in the pH value from 6.5 (pH of the distilled water) to 8.4 was observed, indicating...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001632
EISBN: 978-1-62708-234-1
... temperature cycles calculated to be from 400 to 30 deg C (752 to 86 deg F). The window was activated to >200 Sv/h. It was determined through analysis using remote handling techniques and hot cells that the crack initiated near a spot weld used to affix thermocouples to the window surface. In addition...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001215
EISBN: 978-1-62708-235-8
... or in the case of uncomplicated components by cooling in water retards the reaction in the pure zinc layer. Heat spot can be brought about deliberately in hot galvanising by supplying heat directly to the galvanised material after withdrawal (zinc annealing) until the pure zinc layer has been consumed...