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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0091694
EISBN: 978-1-62708-220-4
... Abstract Tube sheets (found to be copper alloy C46400, or naval brass, and 5 cm (2 in.) thick) of an air compressor aftercooler were found to be cracked and leaking approximately 12 to 14 months after they had been retubed. Most of the tube sheets had been retubed several times previously...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001570
EISBN: 978-1-62708-220-4
... to the cyclic stress imposed by the tubes. The cyclic stress arised from the thermal cycling of the heat exchanger. The possible effects of material properties on the failure of the tubesheet are discussed. Heat exchangers Tube sheet Welded joints Titanium cladding Carbon steel Galvanic corrosion...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001047
EISBN: 978-1-62708-214-3
...Compositions of tube sheet materials Table 1 Compositions of tube sheet materials Material Composition, % Cr Ni Mo Nb Cu N Fe E-Brite 26.0 0.5 0.75–1.5 0.05–0.2 0.2 0.015 bal Ferralium 26.0 5.5 3.3 … 1.7 0.17 bal Fig. 1 Tube sheet assembly...
Image
Published: 01 December 1993
Fig. 4 Tube section near the bottom tube sheet, showing an area at the weld/base metal interface where a combination of both uniform and localized corrosion occurred. In this particular section, the wall thickness has been reduced to 0.8 mm (0.032 in.) by the uniform attack and to 0.56 mm More
Image
Published: 01 June 2019
Fig. 1 Tube sheet from an air compressor aftercooler that failed by SCC. (a) Configuration of tube sheet. (b) Micrograph of a specimen etched in 10% ammonium persulfate solution showing intergranular crack propagation. 250×. (c) Macrograph of an unetched specimen showing multiple branching More
Image
Published: 01 December 1992
Fig. 1 Tube sheet assembly. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0047611
EISBN: 978-1-62708-220-4
... tubes expanded and welded into two type 304L stainless steel tube sheets. The tubes failed by crevice corrosion. The failed tubes were defective as-received, and the establishment of concentration cells within the longitudinal cracks in the seam welds led to ultimate corrosive penetration of the wall...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001311
EISBN: 978-1-62708-215-0
... Tube section near the bottom tube sheet, showing an area at the weld/base metal interface where a combination of both uniform and localized corrosion occurred. In this particular section, the wall thickness has been reduced to 0.8 mm (0.032 in.) by the uniform attack and to 0.56 mm (0.022...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0060104
EISBN: 978-1-62708-220-4
...-side fluid was contaminated liquid methylene chloride. More than 100 tubes exhibiting severe outer surface pitting and cracklike indications near each tube sheet were revealed during eddy current inspection. It was observed that the indications correlated with rust-stained, pitted, and cracked areas...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001063
EISBN: 978-1-62708-214-3
... plant that produces vinyl acetate monomer. Leaks were discovered after 5 years of operation and relocation of the condenser to another unit in the same plant. Examination of tubes and tube sheets revealed pitting damage on the OD surface. Some of the pits had penetrated fully, resulting in holes. Inside...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001662
EISBN: 978-1-62708-236-5
... Abstract A steam heated exchanger was designed for concentrating sulfuric acid. Tantalum was selected for the tubing and the tube sheet liner because of its outstanding corrosion resistance. However, although the exchanger passed a searching shop inspection, it leaked during site testing...
Image
Published: 01 December 1992
Fig. 2 Sample showing cracking in and around the peripheral tubes, as well as in the area of the floating tube sheet. More
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
... and severity of the cracking. The condenser had four water boxes, each containing two pairs of Muntz metal (UNS C28000) tube sheets. Each tube sheet pair contained 5622 25 mm (1 in.) OD × 19 BWG × 14 m (45 ft) UNS C44300 inhibited admiralty brass tubes (total of 44,976 tubes) and 1102 25 mm (1 in.) OD × 19...
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
...), deposits occurred on the tubes, as revealed during the site inspection. Under these deposits, the water tended to be stagnant, and the chloride content tended to further increase. Because the operating pressure had been high, the tubes became seal-welded to the tube sheet. This resulted in residual...
Image
Published: 01 December 1992
Fig. 8 Debris found in engine. All fragments were identified as type 304 stainless steel. The extensive craters in (b) correspond to the particles in (c). (a) Coarse debris found between screens. (b) Small piece of screen found between screens. (c) Fine debris found on heater tube sheet. 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
.... Investigation Examination revealed cracks in the tube wall about 75 mm (3 in.) from the tube sheet and at the first full-depth fin on the tube ( Fig. 1a ). Hardness of the tube was 30 HRC at the inside surface and up to 40 HRC at the base of the fin midway between the roots. These hardness values indicated...
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
... combustion gases, steam, or water to gases, vapors, or liquids of various types. Heat exchangers are of tube, plate, or sheet construction. Tubular heat exchangers are generally used for large fluid systems, whereas heat exchangers of plate or sheet construction are often preferred for smaller fluid streams...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001106
EISBN: 978-1-62708-214-3
... steel Specifications for the tubes had called for AISI type 310S to be used. It was recommended that other tubes made from the same batch of steel sheet be checked. Selected Reference Selected Reference • Pond R.B. Jr. Shifler D. A. , High-Temperature Corrosion-Related Failures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091703
EISBN: 978-1-62708-229-7
... the cooler. Two previous leaks had been determined to have been caused by poor-quality rolling between the tube and tube sheet. Plant personnel suspected the possibility of fatigue cracks caused by flow-induced vibration. Investigation The tube was removed from the cooler by the original equipment...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001033
EISBN: 978-1-62708-214-3
... 304 stainless steel. The extensive craters in (b) correspond to the particles in (c). (a) Coarse debris found between screens. (b) Small piece of screen found between screens. (c) Fine debris found on heater tube sheet. Fig. 4 Regenerator screens after 80 h of engine operation. (a) Damaged...