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Steam condensate

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091631
EISBN: 978-1-62708-229-7
... Abstract A steam-condensate line (type 316 stainless steel tubing) began leaking after five to six years in service. The line carried steam condensate at 120 deg C (250 deg F) with a two hour heat-up/cool-down cycle. No chemical treatment had been given to either the condensate or the boiler...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001334
EISBN: 978-1-62708-215-0
... Abstract Leaks developed at random locations in aluminum brass condenser tubes within the first year of operation of a steam condenser in a nuclear power plant. One failed tube underwent scanning electron microscopy surface examination and optical microscope metallography. It was determined...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001240
EISBN: 978-1-62708-234-1
... by erosion were noticeable. This was a typical case of crevice corrosion. The rolled joint evidently was not entirely tight, so that saturated steam condensate could penetrate into the gap. Heat exchangers Oil burners Pipe Fe-0.15C Pitting corrosion Erosion - corrosion Crevice corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001409
EISBN: 978-1-62708-229-7
... velocities. In the present study, steam turbine condenser tubes had to be renewed after 25 years of service. The tubes were nominally of 70:30 brass. The appearance of a typically corroded one showed uniform dezincification attack on the bore, extending from one-half to two-thirds through the tube wall...
Image
Published: 01 January 2002
Fig. 30 Section through type 316 stainless steel tubing that failed by SCC because of exposure to chloride-contaminated steam condensate. Micrograph shows a small transgranular crack that originated at a corrosion pit on the inside surface of the tubing and only partly penetrated the tubing More
Image
Published: 01 June 2019
Fig. 1 Section through type 316 stainless steel tubing that failed by SCC because of exposure to chloride-contaminated steam condensate. Micrograph shows a small transgranular crack that originated at a corrosion pit on the inside surface of the tubing and only partly penetrated the tubing More
Image
Published: 30 August 2021
Fig. 6 Copper alloy C26000 steam-turbine condenser tube that failed by dezincification. (a) Section through condenser tube showing dezincification of inner surface. Original magnification: 3.5×. (b) Etched specimen from the tube showing corroded porous region at the top and unaffected region More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0048719
EISBN: 978-1-62708-228-0
... condensate injected into reformer systems are normally free of chlorides, there can be accidental carry-over of dissolved solids with the steam under periods of high demand. Conclusion The tubes failed in SCC caused by chlorides in the presence of high residual stresses. The fins were cold formed...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001310
EISBN: 978-1-62708-215-0
... Abstract Leaks developed in 22 admiralty brass condenser tubes. The tubes were part of a condenser that was being used to condense steam from a nuclear power plant and had been in operation for less than 2 years. Analysis identified three types of failure modes: stress-corrosion cracking...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001010
EISBN: 978-1-62708-229-7
.... This seems an unlikely situation in a component operating in an atmosphere of superheated steam, but when the long connections to the nozzles are considered, the matter becomes clearer. In all three lines condensation will take place and the condensation will return to the nozzles where it will be evaporated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001421
EISBN: 978-1-62708-235-8
... for about a fortnight at a time, leaving the pipe open to the range, and there was a drain connected to the upper part of the body of this valve for the purpose of discharging condensate via a steam trap. Any condensate that accumulated in the horizontal part of the pipe would tend to be carried forward...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001816
EISBN: 978-1-62708-180-1
..., composition of fuel, amount of excess combustion air, type and amount of water-conditioning chemicals added, type and amount of contaminants in condensate and make-up feedwater, frequency and methods of cleaning fire-side and water-side surfaces of steam generators, materials specified as to alloy...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001143
EISBN: 978-1-62708-229-7
.... The solid particle erosion causes a blade material loss and, therefore, lessens the structural strength of the blade. The erosion pits also act as pockets for condensed steam to collect and for corrosion to occur. Both of these mechanisms serve to lower the endurance limit of the blade resulting...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001044
EISBN: 978-1-62708-214-3
... (total of 4408 tubes) in the air-removal section. Each bank of tubes was supported by 13 carbon steel support plates on the steam side of the condenser. Specimen Selection Two samples of the inhibited admiralty brass condenser tubes were sent for examination. One sample consisted of a complete...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001001
EISBN: 978-1-62708-229-7
... Abstract Examination of the header of the third superheater of a boiler producing 150 t/h of steam at 525 deg C and 118 kPa, disclosed extensive internal cracking at the connection to the tube joining this to a safety valve. Cracking was observed within the tube and in the thickness...
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
... Abstract A brass elbow that formed one termination of a steam heating coil failed adjacent to the brazed connection after ten years of service. Chemical analysis showed that the elbow was made from a 60-40 CuZn brass containing 3% lead and 1% tin, a typical alloy used for the manufacture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0045911
EISBN: 978-1-62708-230-3
... of the bellows, and condensate was drained from the expansion joint to an adjacent 205-mm (8-in.) diam condensate return line through a steam trap. Investigation and Results Sections of the failed bellows and sections of bellows contaminated with a white material were submitted for analysis. The outer ply...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048814
EISBN: 978-1-62708-229-7
... to influence the purity level of the coolant water in the steam generators. Brackish river water had corroded copper alloys in the condenser tubes, and some leakage into the system was indicated. Both cuprous oxide (Cu 2 O) and α-hematite were found in the sludge, indicating that oxygen control in the steam...
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
... content, may suffer dezincification. Figure 6 shows a section through a copper alloy C26000 steam-turbine condenser tube. Uniform dezincification of the bore extended from one-half to two-thirds through the wall of the tube. The porous nature of the affected portion of the tube is shown in Fig. 6(b...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006825
EISBN: 978-1-62708-329-4
.... The discussion is mainly concerned with failures in Rankine cycle systems that use fossil fuels as the primary heat source. In a Rankine cycle system, the steam is generated in a boiler, followed by its expansion in the prime mover and condensation in the condenser; finally, it is fed into the boiler again...