1-20 of 332 Search Results for

reduced-pressure test

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001327
EISBN: 978-1-62708-215-0
... microstructure of HAZ Abstract Three ASME SA106 grade B carbon steel feed water piping reducers from a pressurized water reactor showed indications of flaws near welds during ultrasonic testing. Further examination and testing indicated that the cracks resulted from a low-cycle corrosion fatigue...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001053
EISBN: 978-1-62708-214-3
... the fracture origin at the toe of the nozzle weld (arrow). Fig. 6 Metallographic section through the failure origin, showing the arc strike, entrapped slag, HAZ, and base metal microstructures. Nital etch. 27├Ś. Fig. 1 Pressure vessel immediately after the hydro test failure. Fig. 2...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001456
EISBN: 978-1-62708-229-7
... Abstract An unusual type of defect was discovered during hydraulic testing of a water-tube boiler after repairs to the superheater tubes following erosion from soot-blowers. When the pressure reached 700 psi, slight leakage was found to be taking place from one of the superheater tubes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001696
EISBN: 978-1-62708-234-1
... from superficial to severe, with some pits extending through 75% of the tube's wall thickness. The SCC emanated from the pits and further reduced the service strength of the component until it could no longer sustain the operating pressure and final catastrophic fracture occurred. Corrosion-resistant...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003569
EISBN: 978-1-62708-180-1
... more difficult. Cavitation Mechanisms Cavitation can occur if the pressure on a liquid is reduced sufficiently to cause formation of vapor-filled voids, or cavities (bubbles), even at room temperature. When the liquid that contains cavities is subsequently subjected to higher hydrostatic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046535
EISBN: 978-1-62708-234-1
... of pipe were joined by shielded metal arc welding. Soundness of the welded joints was determined by water back-pressure testing after several lengths of pipe had been installed and joined. Before completion of the pipeline, a pressure drop was observed during back-pressure testing. An extreme depression...
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
... stator was subject to severe erosion after relatively short operating times and initially required replacement after each test program. Although up to 60 cu cm (3.7 cu in.) of material was being lost from each vane, it only reduced the power-absorption capacity by a small amount. Analysis supported...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048840
EISBN: 978-1-62708-220-4
... content responsible for controlling grain size and reducing susceptibility to strain aging varied among the plates, but was very low for three of the plates (<0.005%). The hydrogen contents of the steels were normal. Toughness tests were performed on numerous plate samples from locations near...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001491
EISBN: 978-1-62708-217-4
... insulators had not cracked because of poor material quality. The increase in cure pressure can also be dispelled as a cause for failure. Test data shown in Tables 2 and 3 indicate that increased cure pressure reduces strength only slightly and increases modulus slightly. It does not account for the large...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001287
EISBN: 978-1-62708-215-0
... Tensile testing results Table 2 Tensile testing results Specimen identification (a) Reduction of area, Elongation, Yield stress 0.2% proof stress Ultimate tensile strength % % MPa tonf/in. 2 MPa tonf/in. 2 MPa tonf/in. 2 L1 52 20 426.1 30.9 470.2 34.1...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
..., and caused a sheet of paper held in front of the conveyor to move noticeably. The final test involved performing a resonance check on the window. A plot of the response of one of the control room windows showed that the natural frequency of the window was very close to the frequency of the pressure waves...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001668
EISBN: 978-1-62708-232-7
... is 4.40 kN, which is approximately one-twelfth of that which each bolt is capable of carrying. Thus, under normal operation two bolts would be sufficient to retain the lid on the lower vessel. Proof testing was conducted to a pressure of 13.79 MPa prior to putting this vessel in service which gave...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001055
EISBN: 978-1-62708-214-3
... should be normalized to reduce residual welding stresses and to improve the impact toughness of the steel by producing a more uniform microstructure. In addition, the water hammer should be reduced, especially in the winter months, by decreasing the operating pressure or by wrapping the air release...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0065825
EISBN: 978-1-62708-228-0
... used in an effort to make the toughness tests more relevant. Indeed, fracture initiation tests were even performed on actual full lengths of pressurized line pipes (see Ref 3 , 4 , for example). To illustrate, Fig. 1 shows a full-size section of an X60 grade line pipe that was pressurized...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006911
EISBN: 978-1-62708-395-9
... ) limit by constant velocity and incremental load. (b) PV limit (nominal contact pressure over sliding velocity) and the endpoint heat dissipation limits and plasticity limits of the material. Fig. 6 Common contact geometries for tribological testing including area, line, and point contacts...
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
... in most areas. This corrosion was fairly uniform around the circumference of the hose. The loss of two spirals/layers of wire reinforcement effectively reduced the pressure carrying capacity of the hose to below that of the maximum operational pressure experienced. Either the hose (or assembly...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001647
EISBN: 978-1-62708-235-8
... the pressure decreased faster, indicating that the CS/Al inner container absorbed more heat, better buffering the internal gas against postweld heat loss. Pressure behavior during the weld, however, was similar for all tests. During the weld, at least until weld tie-in, the outer container is able to vent...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006812
EISBN: 978-1-62708-329-4
... Abstract This article discusses pressure vessels, piping, and associated pressure-boundary items of the types used in nuclear and conventional power plants, refineries, and chemical-processing plants. It begins by explaining the necessity of conducting a failure analysis, followed...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006807
EISBN: 978-1-62708-329-4
... creep testing and remaining-life assessment, and pressure vessel time-dependent stress analysis showing the effect of stress relaxation at hot spots. creep curve creep testing elevated-temperature life assessment heater tubes high-temperature components hydrogen attacks remaining-life...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001087
EISBN: 978-1-62708-214-3
... to the reagent slurry tank (recirculation test) the discharge pressure dropped, as was expected because of the elimination of vertical head to the discharge point, and the slurry flow rate rose to five times the design value. Hardness was determined using a Shore A durometer. The hardness of each component...