Save 20% on select titles with code HIDDEN24 - Shop The Sale Now
The failure assessment of the collapse of the Quebec Bridge in 1907 conducted by the Royal Commission is discussed in the following paper. The Quebec Bridge is a 987.5 m long; 29 m wide; and 104 m high riveted steel truss structure which collapsed not once but twice during construction. The reason for the bridge failure was attributed to member behavior and stability proved by experimental work conducted following the collapse by Royal Commission. The bridge was finally completed in 1917 and has been in operation since then. The lessons learned from the bridge collapse were pivotal in the advancement of engineering design, fabrication and formation of the two organizations, namely - the American Association of State Highway and Transportation Officials (AASHTO) in 1914 and American Institute of Steel Construction (AISC) in 1921. The author highlights the importance of validating the design criteria and specifications by material and load testing, conducting peer reviews, design control, and paying attention to details. The lessons learned reinforce the need to establish and monitor shop fabrication practices, inspection procedures and gates (witness, hold and review points) to safely complete the execution of any civil engineering project, be it onshore or offshore construction.
A sulfur recovery unit (SRU) train in a gas processing facility went under an emergency shutdown due to the failure of a reaction furnace waste heat boiler (WHB) tube. The failed tube had been in service for approximately 18 years. The failed tube was subjected to a number of metallurgical laboratory examinations in order to determine the damage mechanism and root cause(s) of the failure. Examinations included visual inspection, scale analysis, chemical analysis, metallographic examination and mechanical testing. The examination revealed internal corrosion thinning in the tube which led to rupture since the tube could no longer withstand the pressure. Metallographic examination revealed spheroidized microstructure indicating that the tube experienced high metal temperature. This is suggesting that something was impeding heat transfer between the tube and water. Scale analysis results from a sample collected from the tube internal surface indicated the presence of iron sulfide corrosion products. Based on the aforementioned findings, it was concluded that the corrosion thinning was caused by sulfidation. Sulfidation is one of the potential damage mechanisms in WHB tubes and is caused by reactive sulfur species as a result of the thermal decomposition of sulfur compounds at high temperatures (above 500oF). Failure contributing factors as well as corrective actions to prevent recurrence of such failure are discussed in this paper.
We are unable to complete this action. Please try again at a later time.
If this error continues to occur, please contact AMPP Customer Support for assistance.
Error Message:
Please login to use Standards Credits*
* AMPP Members receive Standards Credits in order to redeem eligible Standards and Reports in the Store
You are not a Member.
AMPP Members enjoy many benefits, including Standards Credits which can be used to redeem eligible Standards and Reports in the Store.
You can visit the Membership Page to learn about the benefits of membership.
You have previously purchased this item.
Go to Downloadable Products in your AMPP Store profile to find this item.
You do not have sufficient Standards Credits to claim this item.
Click on 'ADD TO CART' to purchase this item.
Your Standards Credit(s)
1
Remaining Credits
0
Please review your transaction.
Click on 'REDEEM' to use your Standards Credits to claim this item.
You have successfully redeemed:
Go to Downloadable Products in your AMPP Store Profile to find and download this item.
This paper describes a bridge coating operation and maintenance manual that was developed for the City of Vancouver which operates and maintains an inventory of 33 bridges with coated steel elements.
Corrosion under insulation (CUI) is a critical challenge that affects the integrity of assets for which the oil and gas industry is not immune. Over the last few decades, both downstream and upstream industry segments have recognized the magnitude of CUI and challenges faced by the industry in its ability to handle CUI risk-based assessment, predictive detection and inspection of CUI. It is a concern that is hidden, invisible to inspectors and prompted mainly by moisture ingress between the insulation and the metallic pipe surface. The industry faces significant issues in the inspection of insulated assets, not only of pipes, but also tanks and vessels in terms of detection accuracy and precision. Currently, there is no reliable NDT detection tool that can predict the CUI spots in a safe and fast manner. In this study, a cyber physical-based approach is being presented to identify susceptible locations of CUI through a collection of infrared data overtime. The experimental results and data analysis demonstrates the feasibility of utilizing machine-learning techniques coupled with thermography to predict areas of concern. This is through a simplified clustering and classification model utilizing the Convolutional Neural Networks (CNN). This is a unique and innovative inspection technique in tackling complex challenges within the oil and gas industry, utilizing trending technologies such as big data analytics and artificial intelligence.