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Hydraulic couplings

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001617
EISBN: 978-1-62708-227-3
...Abstract Abstract Failures of various types of hydraulic couplings used to connect pipes in a naval vessel are described and used to illustrate some of the general procedures for failure analysis. Cracking of couplings, which were manufactured from nickel-aluminum- bronze extruded bar, occurred...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001098
EISBN: 978-1-62708-214-3
...Abstract Abstract Six ASTM A-574 steel cap screws from a hydraulic coupling failed after 3 months in service. The screws were replacements for smaller-diameter cap screws that had been installed during an outage. Six new cap screws were examined along with the failed screws. Eight fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001635
EISBN: 978-1-62708-221-1
... sheath. Failure of the lift hose was approximately 50 to 100 mm away from the "upper" end of the hose, with the straight coupling that attaches to the hydraulic system. The return hose was in much better condition, with no apparent deformation and only small areas of mechanical damage to the outer sheath...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001634
EISBN: 978-1-62708-221-1
... have been proved able to accurately detect corrosion of the strands in the region adjacent to the coupling. Detecting corrosion of the reinforcing strands in wire-reinforced hydraulic hoses can be very difficult. Visually checking is usually insufficient to detect if there is a problem...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001518
EISBN: 978-1-62708-228-0
... the wire reinforcing strands. Radiographic NDT techniques have been proved able to accurately detect corrosion of the strands in the region adjacent to the coupling. Further work is required to establish the optimal changeout frequency of hydraulic hoses to take into account the effects of possible...
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 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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046422
EISBN: 978-1-62708-234-1
...-aluminum alloy. This type of dynamometer acts somewhat like a stalled hydraulic coupling: Vanes in the rotor impart tangential momentum to the water recirculating in a spiral path in the toroidal working compartment, and this momentum is killed by the fixed stator vanes. This results in dissipation...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001812
EISBN: 978-1-62708-241-9
... Test for Copper and Copper Alloys ( 1990 ) 37. ISO 196–1978 (E) Wrought Copper and Copper Alloys—Detection of Residual Stress—Mercury (I) Nitrate Test 38. Lynch S.P. , Edwards D.P. , Nethercott R.B. , Davidson J.L. : Failures of nickel–aluminium bronze hydraulic...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001789
EISBN: 978-1-62708-241-9
.... Lynch S.P. , Edwards D.P. , Nethercott R.B. , Davidson J.L. : Failure of nickel–aluminum bronze hydraulic couplings, with comments on general procedures for failure analysis . Pract. Fail. Anal. 2 ( 6 ), 50 – 61 ( 2002 ) 10.1007/BF02715500 7. Fonlupt S. , Bayle...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001020
EISBN: 978-1-62708-214-3
... attachment lugs. Possibly the most compelling evidence was the intergranular nature of the cracks. They initiated at corrosion pits at the steel pin/aluminum hole interface and probably were accelerated by hydrogen generated at the electrolytic cell created by the steel/aluminum dissimilar metal couple...
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
... STP 728, Tube Sheet Alternatives for Reactive Metal Tubed Heat Exchangers , 16 – 26 ( 1981 ) 10.1520/STP28054S 3. ASM , “Metals Handbook” p. 2.14 ( 1985 ) 4. Scott D. , Wolgemuth G. A. , and Aikin J. A. , ASME Paper 81-PVP-35, Hydraulically Expanded Tube to Tubesheet...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003573
EISBN: 978-1-62708-180-1
... heat treatment, producing a low-strength structure of ferrite and tempered martensite. Fig. 11 Cross sections through the carburized 1117 steel cylinders from two spool-type hydraulic valves. The cylinder of the valve that operated satisfactorily (a) had little retained austenite in the case...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006797
EISBN: 978-1-62708-295-2
... type of ammunition were fired in the test. (a) Inside diameter. (b) Outside diameter Fig. 11 Cross sections through the carburized 1117 steel cylinders from two spool-type hydraulic valves. The cylinder of the valve that operated satisfactorily (a) had little retained austenite in the case...
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
...-bore fitting and two ASME SB-148 CA 954 valve bodies) and an entire valve assembly. The leaks were found to be in the socket-weld crevice area and had resulted from dealloying. It was recommended that the weld joint geometry be modified. Control valves Cooling systems Cooling water Hydraulic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001682
EISBN: 978-1-62708-229-7
... that safety upgrades could be made to the reactors systems. The restart of the production reactors included hydraulic testing of the primary and secondary cooling systems of the K-reactor. During this testing, a crack developed in a convolute of an expansion joint in the secondary cooling water system...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c9001393
EISBN: 978-1-62708-230-3
... of which any lap edges or internal rivet heads not previously welded were dealt with in this manner. The vessel had been inspected internally at five-yearly intervals since it was installed, each inspection being followed by a hydraulic test to a pressure. of 1.5 times the designed working pressure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001721
EISBN: 978-1-62708-225-9
... for both ‘weld by flange’ and ‘venturi pattern weld end’ valves. The particular valves investigated have been in use since 1965 with outstanding service performance. However, the last couple of years have seen a dramatic rise in valve failures for valves which were installed in the early to mid 1990's...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001805
EISBN: 978-1-62708-241-9
... condition was not inherently brittle, and confirmed that the failure mode was coupled with a service related issue. Unused exemplar scissors were next soaked in room-temperature phosphate-buffered saline (PBS) solution. These scissors cracked within 24 h of PBS- exposure time. Metallurgical analysis...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001504
EISBN: 978-1-62708-217-4
... in the next case in more detail. Axle, Crank Lever of Fighter Aircraft Main Landing Gear A main landing gear axle of a fighter aircraft failed catastrophically upon landing when the hub locating the axle in the hydraulic tube fractured circumferentially ( Figs 3 ). This failure damaged the aircraft...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... at Shrinkage Porosity in a Cast Low- Alloy Steel Connector A sand-cast steel eye connector ( Fig. 4a ) used to link together two 54,430 kg (120,000 lb) capacity floating-bridge pontoons broke prematurely in service. The pontoons were coupled by upper and lower eye and clevis connectors that were pinned...