Failures of Cranes and Lifting Equipment

2021 ◽  
pp. 415-434
Author(s):  
Burak Akyuz ◽  
Nicholas Steinhoff
Keyword(s):  
Failure Analysis ◽  
Abrasive Wear ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Wire Rope ◽  
Corrosion Cracking ◽  
Common Cause ◽  
Wire Ropes ◽  
Materials Used ◽  
Lifting Equipment

Abstract The types of metal components used in lifting equipment include gears, shafts, drums and sheaves, brakes, brake wheels, couplings, bearings, wheels, electrical switchgear, chains, wire rope, and hooks. This article primarily deals with many of these metal components of lifting equipment in three categories: cranes and bridges, attachments used for direct lifting, and built-in members of lifting equipment. It first reviews the mechanisms, origins, and investigation of failures. Then the article describes the materials used for lifting equipment, followed by a section explaining the failure analysis of wire ropes and the failure of wire ropes due to corrosion, a common cause of wire-rope failure. Further, it reviews the characteristics of shock loading, abrasive wear, and stress-corrosion cracking of a wire rope. Then, the article provides information on the failure analysis of chains, hooks, shafts, and cranes and related members.

Failure Analysis Cases of Stress Corrosion Cracking in Complex Media Environments

2014 ◽  
Author(s):  
Zhibin Ai ◽  
Xuedong Chen ◽  
Zhichao Fan ◽  
Rongrong Li
Keyword(s):  
Failure Analysis ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Raw Materials ◽  
Poor Quality ◽  
Corrosion Cracking ◽  
Chemical Plant ◽  
Complex Media ◽  
Process Plants ◽  
Media Environments

The phenomenon of stress corrosion cracking extensively exists in equipments and pipelines of process plants due to aggravated tendency of raw materials to poor quality, especially in complex media environment, the factors causing stress corrosion cracking are very complex, sometimes a certain medium plays a dominating role, sometimes several kinds of media act together, and sometimes the actions of some media change to each other in different periods. In this paper, the laws of competition, promotion or suppression among multiple mechanisms upon stress corrosion cracking due to multiple causes are described through failure analysis of stress corrosion cracking accident cases such as cracking of inner wall cladding of cyclone separator for coal chemical plant, explosion of gasification furnace for coal chemical plant, etc., and analysis and judgment methods of their dominating mechanisms, influential laws of secondary mechanisms and preventive measures are proposed.

Failure Analysis of Stress Corrosion Crack of 1Cr18Ni9 Stainless Steel Cylinder Body

2012 ◽  
Vol 591-593 ◽  
pp. 1094-1097
Author(s):  
De Qiang Wei ◽  
Xin Dong ◽  
Shan Qiu Li
Keyword(s):  
Stainless Steel ◽  
Failure Analysis ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Xrd Analysis ◽  
Corrosion Cracking ◽  
Steel Cylinder ◽  
Circulating Water ◽  
Piston Cylinder ◽  
Electron Microscopy Analysis

As a kind of corrosion resistant material, stainless steel is widely used in petroleum, chemical, pharmaceutical. Stress corrosion cracking is a main reason that why the stainless steel became disabled. Therefore, it is very necessary to research and study the stress corrosion cracking of stainless steel .The failure analysis to the sample is conducted aiming at the stress corrosion of the stainless steel piston cylinder in a factory. The analysis includes macro analysis, metallographic observation, scanning electron microscopy analysis and XRD analysis. The results of the study show that it is nonmetallic inclusion on the grain boundary, the chloridion in the industrial circulating water and the rough columnar austenitic grains in the organization of the samples that lead to the stress corrosion cracking of the piston cylinder.

Sign in / Sign up

Export Citation Format

Share Document