Menu
Search
Filters
Close
Menu

Celebrate World Corrosion Awareness Day with 20% off eCourses and eBooks with code WCAD2024 at checkout!

01522 WELD CRACKING IN A 72-INCH (1829 mm) STAINLESS STEEL FCU DUCT

Picture for 01522 WELD CRACKING IN A 72-INCH (1829 mm)
Available for download
Product Number: 51300-01522-SG
ISBN: 01522 2001 CP
Author: Gerald W. Wilks
$0.00
$20.00
$20.00
In 1996 the 72-inch (1829 mm), 304H stainless steel duct that carries flue gas from the regeneration system of a Fluidized Catalytic Cracking Unit (FCU) to a power recovery turbine (PRT) fractured and the unit had to be shut down for duct repairs. Many of the welds in the duct that were upstream of control valves in this piping system were repaired during that shut down, and during the next scheduled shutdown in 1999, inspections were conducted on the remaining welds in this duct. It was discovered that all of the longitudinal welds and many of the circumferential welds that had not been previously repaired contained significant cracks. Most of the welds were then repaired and returned to like new condition, but some of the welds were only partially repaired from the inside of the duct. This paper explains the following: the operating conditions for the flue gas system, why the welds were cracking, what inspections were used to detect the cracks, and Omega analyses used to determine fitness for service of partially repaired welds. Corrosion aspects of FCU flue gas systems are also reviewed.
In 1996 the 72-inch (1829 mm), 304H stainless steel duct that carries flue gas from the regeneration system of a Fluidized Catalytic Cracking Unit (FCU) to a power recovery turbine (PRT) fractured and the unit had to be shut down for duct repairs. Many of the welds in the duct that were upstream of control valves in this piping system were repaired during that shut down, and during the next scheduled shutdown in 1999, inspections were conducted on the remaining welds in this duct. It was discovered that all of the longitudinal welds and many of the circumferential welds that had not been previously repaired contained significant cracks. Most of the welds were then repaired and returned to like new condition, but some of the welds were only partially repaired from the inside of the duct. This paper explains the following: the operating conditions for the flue gas system, why the welds were cracking, what inspections were used to detect the cracks, and Omega analyses used to determine fitness for service of partially repaired welds. Corrosion aspects of FCU flue gas systems are also reviewed.
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 01520 MATERIAL DAMAGE IMPLICATIONS OF POST
Available for download

01520 MATERIAL DAMAGE IMPLICATIONS OF POST WELD HEAT TREATING H2 BLISTERS IN CARBON STEEL

Product Number: 51300-01520-SG
ISBN: 01520 2001 CP
Author: Jorge L. Hau Marianela Ledezma Ulises A. Yfpez
$20.00
Picture for Sigma Phase Embrittlement of Type 304H Stainless Steel after FCCU Service
Available for download

Sigma Phase Embrittlement of Type 304H Stainless Steel after FCCU Service

Product Number: 51317--9140-SG
ISBN: 9140 2017 CP
Author: Jorge Hau
Publication Date: 2017
$20.00

Results are described of sigma phase embrittlement assessments performed at three different refineries and mainly involving regenerator cyclones at fluidized catalytic cracking units (FCCU) but also including regenerator cyclones hanger rods and a regenerator flue gas line.
Picture for 00504 COMPARISON OF THE CORROSION BEHAVIOR
Available for download

00504 COMPARISON OF THE CORROSION BEHAVIOR OF STAINLESS STEEL WELD MATERIALS VERSUS BASE METALS IN NUMEROUS CHEMICAL ENVIRONMENTS

Product Number: 51300-00504-SG
ISBN: 00504 2000 CP
Author: Michael H. W. Rennet
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support