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Feed pipes

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c9001564
EISBN: 978-1-62708-230-3
... Abstract An 8 in. diam stainless steel black liquor feed pipe to a carbon steel digester had failed within one year of service. The material was type 316 molybdenum-containing austenitic stainless steel. The service environment was alkaline black liquor at 175 deg C (350 deg F). The pipe had...
Image
Published: 01 June 2019
Fig. 13 Diagram showing relation of feed pipe to steam cooler and area of cracking. More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001065
EISBN: 978-1-62708-214-3
... Abstract A 460 mm (18 in.) diam suction line to the main feed water pump for a nuclear power plant failed in a violent, catastrophic manner. Samples of pipe, elbow, and weld materials (ASTM A106 grade B carbon steel, ASTM A234 grade WPB carbon steel, and E7018 carbon steel electrode...
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
... 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 phenomenon...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001477
EISBN: 978-1-62708-229-7
... surface was considered. This aspect was further explored and it ultimately transpired that the shutdown prior to the decision to proceed with the repairs to water wall tubes was occasioned by the failure of a pipe supplying feed water to an injection type steam desuperheater situated above the drum...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091528
EISBN: 978-1-62708-229-7
... of a steam line to feed concentrated caustic during chemical cleaning, the preventive measure may be no more complicated than exclusion of the corrodent from that region of the system. In many instances, however, reduction of the level of residual stress is the most effective means of minimizing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001699
EISBN: 978-1-62708-234-1
... in the water (residuals) and the installation/monitoring of corrosion coupons installed in the system, was recommended. The monitoring of residual levels of chemicals and automatic feeding of chemicals was recommended to control corrosion and organic growth. Conclusions Experience in the investigation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001398
EISBN: 978-1-62708-229-7
... was found to be free from cracking. The de-superheaters were fed with treated feed water which, after demineralisation, was treated with activated sodium sulphite as an oxygen scavenger and sodium hydroxide to adjust the alkalinity. From this stage, water was fed to the de-superheaters and the boiler water...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001434
EISBN: 978-1-62708-236-5
... subsequently developed. The rod was made from a medium carbon or low-alloy steel in the hardened and fully tempered condition. Evidence indicated that, following modification to the oil feed system, the rod that broke was returned to service with fine cracks present immediately below the weld deposit, which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001713
EISBN: 978-1-62708-220-4
... temperature rise of 486 °C. It was estimated that this is an eleven-fold increase in the amount of heat that would be released if Al were not included in the mixture. One early scenario for the accident was that the feed tube became plugged during the second shift and the workers tried to purge...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048772
EISBN: 978-1-62708-220-4
... from a triolefin-unit heater ruptured ( Fig. 1a ). The bend was made from 115-mm (4 1 2 -in.) schedule 40 (6.0 mm, or 0.237-in., wall thickness) pipe of ASTM A213, grade T11, ferritic steel. The unit operated at 2410 kPa (350 psi), with a hydrocarbon feed stream (85% propylene) entering at 260...
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
... expansion joints. The purpose of the expansion joints was to isolate the boiler feed pump turbine from stresses induced by thermal growth of the horizontal condenser pipe. Thrust canceling rods were installed between the end cap and the main condenser. The thrust canceling struts transmitted the atmospheric...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001826
EISBN: 978-1-62708-241-9
... (evaporating capability) 109.7 kg/s; 394,920 kg/h Steam temperature TSH outlet (from 50% MCR up to MCR) 525 °C Steam pressure TSH outlet (from minimum up to MCR) 84 (85) barg (A) Feed water temp. Eco. Inlet (from 50% MCR up to MCR) 235 °C Boiler water pH value 9.5–10.5 Firing system Crude...
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
..., or 0.237 in., wall thickness) pipe of ASTM A213, grade T11 (1.25Cr-0.5Mo) ferritic steel. The unit operated at 2410 kPa (350 psi), with a hydrocarbon feed stream (85% propylene) entering at 260 to 290 °C (500 to 550 °F) and leaving at 425 to 480 °C (800 to 900 °F). The temperature of the combustion gas...
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
..., or during periods of full-power operation, may be caused by sudden loss of circulation resulting either from general loss of circulation, for example, feed-pump failure, or from local loss of circulation affecting only a few tubes. Example 2: Rupture of Chromium-Molybdenum Steel Superheater Tubes Because...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001818
EISBN: 978-1-62708-180-1
..., ferritic steel. The unit operated at 2410 kPa (350 psi), with a hydrocarbon feed stream (85% propylene) entering at 260 to 290 °C (500 to 550 °F) and leaving at 425 to 480 °C (800 to 900 °F). The temperature of the combustion gas was 900 °C (1650 °F). Fig. 3 Return bend made of ASTM A213, grade T11...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001791
EISBN: 978-1-62708-241-9
... during test on sea), as shown in Fig. 1 . When feeding of vapor generators is carried out with nontreated water, i.e., water which contains soluble salts, it can cause two main types of degradation: incrustation and corrosion. Degradation due to theses factors can be avoided by eliminating...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... solidification and contraction of the metal, when there may eventually be insufficient liquid metal to feed the last remaining portions as they contract. A concave cavity thus forms at the top of the ingot. The cavity usually forms in the shape of a cone, hence the term pipe . If the ingot is improperly...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006808
EISBN: 978-1-62708-329-4
..., where stress concentration is greatest. Their occurrence may be minimized by pausing before breaking the arc, by breaking and restarting the arc several times to feed the shrinkage pipe, or by terminating welding on runoff tabs that are cut away later. If crater cracks are found, they should be ground...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
... surfaces affects the resistance of the current path in the solution and the external circuit. Thus, if dissimilar pipes are butt welded with the electrolyte flowing through them, the most severe corrosion will occur immediately adjacent to the weld on the anodic member. Effect of Shape The geometry...