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Copper pipe

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001411
EISBN: 978-1-62708-234-1
... Abstract A welded joint between lengths of 4 in. OD x 13 SWG copper pipe which formed part of a cold-water main failed by cracking over one-third of the circumference. Microscopic examination of the filler metal showed that it had a structure corresponding to a brass of the 60:40 type commonly...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0091292
EISBN: 978-1-62708-219-8
... Abstract A 25 mm (1 in.) copper coupling had been uniformly degraded around most of the circumference of the bell and partially on the spigot end. One penetration finally occurred through the thinned area on the spigot end of the pipe. Investigation supported the conclusion that although...
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Published: 01 January 2002
Fig. 10 Erosion pitting caused by turbulent river water flowing through copper pipe. The typical horseshoe-shaped pits point upstream. 0.5× More
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Published: 01 January 2002
Fig. 49 Erosion pitting caused by turbulent river water flowing through copper pipe. The typical horseshoe-shaped pits point upstream. Approximately 0.5× actual size More
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Published: 15 January 2021
Fig. 49 Erosion pitting caused by turbulent river water flowing through copper pipe. The typical horseshoe-shaped pits point upstream. Original magnification: ~0.5× actual size More
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Published: 15 January 2021
Fig. 10 Erosion pitting caused by turbulent river water flowing through copper pipe. The typical horseshoe-shaped pits point upstream. Original magnification: 0.5× More
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Published: 15 January 2021
Fig. 14 (a) Cuprous oxide inside copper pipe. Binocular microscope view. (b) Section through pit with cuprous oxide. (c) Pitting corrosion in cross section of 304 stainless steel etched with electrolytic oxalic acid More
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Published: 15 January 2021
Fig. 15 (a) Erosion in copper pipe. (b) Erosion pit with no corrosion product visible. (c) Erosion on the outside diameter of austenitic stainless steel heat-exchanger tube. (d) Section through same tube shown in (c). (e) Section through same tube shown in (c) and etched with electrolytic More
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
... Abstract In a copper hot water system, a bent pipe was soldered into a straight pipe with twice the diameter. The neighborhood of the soldered joint was covered with corrosion product predominantly blue-green in color, presumably carbonates. When these corrosion products were scratched off...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001697
EISBN: 978-1-62708-219-8
... of five case histories on the failure of copper and steels as used in potable and non-potable water systems. The case histories cover a range of applications in which copper and steel products have been used. Copper and steel pipes are the two most commonly used materials in residential, commercial...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0091293
EISBN: 978-1-62708-234-1
... Abstract Copper piping in a closed-loop water heater system was found to be corroded with MIC and erosion of the weak oxide layer. Investigation (visual inspection, bacterial corrosion cultures, and 20x/400x micrographs) supported the conclusion that the corrosion was caused by microbiological...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001698
EISBN: 978-1-62708-222-8
... Abstract A residential subdivision near Tampa, FL was constructed in 1984 through 1985. Several sections of copper pipe were removed from one residence that had reported severe leaking. Visual examination revealed extensive pitting corrosion throughout the ID surfaces of the sample. Microscopic...
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Published: 01 January 2002
Fig. 12 Micrograph of 19 mm (0.75 in.) copper piping in a closed-loop water system with MIC and erosion of the weak oxide layer. 20×. Courtesy of MDE Engineers, Inc. More
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Published: 01 June 2019
Fig. 2 Micrograph of 19 mm (0.75 in.) copper piping in a closed-loop water system with MIC and erosion of the weak oxide layer. 20×. Courtesy of MDE Engineers, Inc. More
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Published: 15 January 2021
Fig. 12 Micrograph of 19 mm (0.75 in.) copper piping in a closed-loop water system with microbiologically induced corrosion and erosion of the weak oxide layer. Original magnification: 20×. Courtesy of MDE Engineers, Inc. More
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Published: 01 December 2019
Fig. 9 Golden-yellow color copper-alloy streaks on pipe OD surface More
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
... Abstract Soft-soldered copper pipe joints used in refrigerating plants failed. The solder had not adhered uniformly to the pipe surface. In addition, there were some longitudinal grooves on the pipe surfaces, parts of which were not filled with solder. The unsoldered areas formed cavities...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001808
EISBN: 978-1-62708-241-9
... of sulfur is also consistent with MIC. The large amount of copper found on the ID surface, and in some of the deposits in these tubes, indicated that other equipment in the water system was also corroding, perhaps copper piping. This evidence indicated that corrosive conditions existed throughout...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001836
EISBN: 978-1-62708-241-9
..., investigators concluded the pipe was contaminated with copper at the mill were it was produced. line pipe cracks copper contamination high-strength low-alloy pipe steel copper entrapment SEM backscattered electron analysis bend ductility API 5L X65 PSL2 (high-strength low-alloy steel...
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
... Abstract A T-piece from a copper hot water system failed. Microscopic examination of a polished section revealed a main crack and branching transcrystalline cracks running from the outer surface of the pipe into the pipe wall. The crack appearance indicated disintegration by stress-corrosion...