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Headers

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0060154
EISBN: 978-1-62708-234-1
... Abstract One of the coils in the radiant section of a primary reformer furnace used in an ammonia plant was found leaking. The bottom of one of seven outlet headers (made of ASME SA-452, grade TP316H, stainless steel) was revealed during examination to be ruptured. It was revealed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0089734
EISBN: 978-1-62708-235-8
... Abstract A system of carbon steel headers, handling superheated water of 188 deg C (370 deg F) at 2 MPa (300 psi) for automobile-tire curing presses, developed a number of leaks within about four months after two to three years of leak-free service. All the leaks were in shielded metal arc butt...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001001
EISBN: 978-1-62708-229-7
... Abstract Examination of the header of the third superheater of a boiler producing 150 t/h of steam at 525 deg C and 118 kPa, disclosed extensive internal cracking at the connection to the tube joining this to a safety valve. Cracking was observed within the tube and in the thickness...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001526
EISBN: 978-1-62708-229-7
... Abstract In Nov. 1998, the west superheater outlet header at an electricity generating plant began to leak steam. Subsequent investigation revealed the presence of a crack that extended for 360 deg around the full circumference of the header and through the full cross-sectional thickness...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001669
EISBN: 978-1-62708-229-7
... Abstract As the result of a leak detected in a plate-formed header at PENELEC'S Shawville Unit No. 3, an extensive failure investigation was initiated to determine the origin of cracking visible along the longitudinal weld seam. Fabricated from SA387-D material and designed for a superheater...
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Published: 01 June 2019
Fig. 7 Tube-to-header weld, axial section, Vilella's etch, 12.8× 12 : (a) header-weld HAZ; (b) tube-weld HAZ; (c) etched 100×; (d) as-polished 100× More
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Published: 01 January 2002
Fig. 28 Header die made from AISI W1 tool steel that failed prematurely in service. (a) The striking face of the carbon tool steel die chipped. The die had been flush quenched through its center hole to harden the working surfaces. (b) Cold etching (10% aqueous nitric acid) of a longitudinal More
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Published: 01 January 2002
Fig. 30 Interligament cracking in a failed secondary superheater outlet header from a boiler. More
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Published: 01 June 2019
Fig. 1 Section through brazed header assembly showing location of cracking. More
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Published: 01 June 2019
Fig. 1 Flange-to-pipe assembly of a carbon steel header, used for handling superheated water, that cracked by fatigue because of notches at welds. (a) Section through butt-welded joint showing crack (arrow A) that originated at toe of weld on inner surface, incomplete weld penetration (arrow B More
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Published: 01 June 2019
Fig. 1 Type 347 stainless steel inlet header for fuel-to-air heat exchanger that cracked due to poor welding technique and unfavorable joint design. Dimensions given in inches More
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Published: 01 June 2019
Fig. 1 Interligament cracking in a failed secondary superheater outlet header from a boiler. More
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Published: 01 January 2002
Fig. 17 Flange-to-pipe assembly of a carbon steel header, used for handling superheated water, that cracked by fatigue because of notches at welds. (a) Section through butt-welded joint showing crack (arrow A) that originated at toe of weld on inner surface, incomplete weld penetration (arrow More
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Published: 01 January 2002
Fig. 18 Type 347 stainless steel inlet header for fuel-to-air heat exchanger that cracked due to poor welding technique and unfavorable joint design. Dimensions given in inches More
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Published: 30 August 2021
Fig. 25 Type 347 stainless steel inlet header for fuel-to air heat exchanger that cracked due to poor welding technique and unfavorable joint design. Dimensions given in inches More
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Published: 30 August 2021
Fig. 53 Interligament cracking in a failed secondary superheater outlet header from a boiler More
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Published: 30 August 2021
Fig. 28 Header die made from AISI W1 tool steel that failed prematurely in service. (a) The striking face of the carbon tool steel die chipped. The die had been flush quenched through its center hole to harden the working surfaces. (b) Cold etching (10% aqueous nitric acid) of a longitudinal More
Image
Published: 01 June 2019
Fig. 8 Tube-to-header weld, axial section (from Fig. 7 at arrow δ): (a) as-polished, 500×; (b) as-polished 1000× More
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Published: 01 June 2019
Fig. 1 Arrangement of nozzle connecting safety valve line to superheater header, showing cracking. More
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Published: 01 June 2019
Fig. 1 Cracking in the superheater outlet header associated with the longitudinal weld seam. More