Dependence of stress corrosion cracking of parent, heat-affected zone, and weld metal of HSLA line-pipe steel on potential

1996 ◽  
Vol 29 (2) ◽  
pp. 131
Keyword(s):  
Weld Metal ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Heat Affected Zone ◽  
Pipe Steel ◽  
Corrosion Cracking ◽  
Line Pipe ◽  
Line Pipe Steel

Stress Corrosion Cracking of X-60 Line Pipe Steel in a Carbonate-Bicarbonate Solution

CORROSION ◽  
1995 ◽  
Vol 51 (2) ◽  
pp. 91-96 ◽  
Author(s):  
A. K. Pilkey ◽  
S. B. Lambert ◽  
A. Plumtree
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Pipe Steel ◽  
Corrosion Cracking ◽  
Line Pipe ◽  
Line Pipe Steel

Validation of EMAT ILI for Management of Stress Corrosion Cracking in Natural Gas Pipelines

2014 ◽  
Author(s):  
Toby Fore ◽  
Stefan Klein ◽  
Chris Yoxall ◽  
Stan Cone
Keyword(s):  
High Resolution ◽  
Natural Gas ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Probability Of Detection ◽  
Gas Pipelines ◽  
Line Pipe ◽  
Natural Gas Pipelines ◽  
Electro Magnetic

Managing the threat of Stress Corrosion Cracking (SCC) in natural gas pipelines continues to be an area of focus for many operating companies with potentially susceptible pipelines. This paper describes the validation process of the high-resolution Electro-Magnetic Acoustical Transducer (EMAT) In-Line Inspection (ILI) technology for detection of SCC prior to scheduled pressure tests of inspected line pipe valve sections. The validation of the EMAT technology covered the application of high-resolution EMAT ILI and determining the Probability Of Detection (POD) and Identification (POI). The ILI verification process is in accordance to a API 1163 Level 3 validation. It is described in detail for 30″ and 36″ pipeline segments. Both segments are known to have an SCC history. Correlation of EMAT ILI calls to manual non-destructive measurements and destructively tested SCC samples lead to a comprehensive understanding of the capabilities of the EMAT technology and the associated process for managing the SCC threat. Based on the data gathered, the dimensional tool tolerances in terms of length and depth are derived.

Weld Residual Stresses and Primary Water Stress Corrosion Cracking in Bimetal Nuclear Pipe Welds

2007 ◽  
Author(s):  
Frederick W. Brust ◽  
Paul M. Scott
Keyword(s):  
Water Stress ◽  
Residual Stresses ◽  
Weld Metal ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Pressure Vessel ◽  
Large Diameter ◽  
Corrosion Cracking ◽  
Primary Water

There have been incidents recently where cracking has been observed in the bi-metallic welds that join the hot leg to the reactor pressure vessel nozzle. The hot leg pipes are typically large diameter, thick wall pipes. Typically, an inconel weld metal is used to join the ferritic pressure vessel steel to the stainless steel pipe. The cracking, mainly confined to the inconel weld metal, is caused by corrosion mechanisms. Tensile weld residual stresses, in addition to service loads, contribute to PWSCC (Primary Water Stress Corrosion Cracking) crack growth. In addition to the large diameter hot leg pipe, cracking in other piping components of different sizes has been observed. For instance, surge lines and spray line cracking has been observed that has been attributed to this degradation mechanism. Here we present some models which are used to predict the PWSCC behavior in nuclear piping. This includes weld model solutions of bimetal pipe welds along with an example calculation of PWSCC crack growth in a hot leg. Risk based considerations are also discussed.

scholarly journals Susceptibility of pipe steel of a controllable rolling tо stress-corrosion cracking

ScienceRise ◽  
2019 ◽  
Vol 1 (9-10) ◽  
pp. 17-27
Author(s):  
Lyudmila Nyrkova ◽  
Anatoliy Rybakov ◽  
Sergey Mel’nychuk ◽  
Svitlana Osadchuk
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Pipe Steel ◽  
Corrosion Cracking
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