AMPP Store - Products tagged with 'mineral wool insulation'

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Assessing Susceptibility of Insulation Materials to IGSCC under Hot and Wet Conditions: A Novel Test Method

Product Number: 51324-20920-SG

Author: Yuan Li; Lisa Sopkow; Simon Yuen; Matthew Krantz; Tony Lam

Publication Date: 2024

$40.00

Intergranular stress corrosion cracking (IGSCC) in above-ground carbon steel pipelines has been identified as a distinct mode of failure, different from the typical neutral pH and high pH SCC observed in buried pipelines. This form of SCC occurs under specific conditions, including operating temperatures ranging from 70°C to 190°C, exposure to wet mineral wool insulation, and insulation installations dating from post-2003. The affected carbon steel grades have included API 5L or CSA Z245.1 with specified minimum yield strength (SMYS) of 52 ksi or higher, as well as A106 Gr B, A234 WPB, and A516 Gr 70. Both field and laboratory tests have been conducted in the past to investigate this phenomenon. However, the underlying mechanism remains unclear. This paper presents a summary of the results obtained from various analytical methods, including chemical analyses, cyclic potentiodynamic polarization (CPP) testing, field crack inspections, U-bend autoclave tests, and a novel wet/dry cyclic test. It outlines the gaps in our understanding and highlights key findings that contribute to a better understanding of SCC in this specific context. Additionally, this paper discusses the development of test methods for screening susceptible materials, which is crucial for preventing failures related to intergranular SCC in above-ground carbon steel pipelines.

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External Stress Corrosion Cracking Of In-Situ Carbon Steel Pipelines

Product Number: 51322-17682-SG

Author: Duane Serate, Matthew Krantz, Yashar Behnamian, Haixia Guo, Simon Yuen, Victor Itulua

Publication Date: 2022

$20.00

There are hundreds of kilometers of above-ground carbon steel pipelines located in 32 in-situ oilsands facilities operated by 18 producers in Alberta Canada, with a total thermal oilsands capacity (operating) of 1.8 million barrels per day. A typical in-situ oilsands operation is for recovering bitumen located 75 meters or more below the surface, by the injection of steam.

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Implication Of Fractographic Analysis Of The In-Service Leak In An Above Ground Pipeline — Potential Role Of Hydrogen

Product Number: 51322-18022-SG

Author: Noelle Easter C. Co, Ming Gao, Ravi M. Krishnamurthy, Satya Kompally, Thomas Coates

Publication Date: 2022

$20.00

Fracture surface morphology is useful in determining the mechanisms involved in cracking. Features in the fracture surface of steel like micro-void coalescence or dimples are often related to ductile crack mode, while features like cleavage, and rock-candy showing grain boundary cracking are commonly related to brittle crack mode. Some fracture surface may have a predominant feature, while others may have presence of mixed features. Types of stress corrosion cracking (SCC) are commonly identified by the features present in the fracture surface. Features showing transgranular quasi-cleavage cracking are often related to near-neutral pH SCC, while features that show rock-candy intergranular cracking are often related to high-pH SCC [1].

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Insulation Driven Intergranular Stress Corrosion Cracking of Carbon Steel

Product Number: 51324-20914-SG

Author: Matt Krantz; Yuan Li

Publication Date: 2024

$40.00

Over the past decade, an increasing number of intergranular stress corrosion cracking (IGSCC) incidents have been observed on carbon steel assets operating in Alberta, Canada. At the time of publication, over 128 distinct cracks have been identified on 26 assets spanning at least 5 operators. All incidents have occurred on uncoated carbon steel operating between 70 °C and 190 °C and exposed to wet mineral wool insulation. Both piping and pressure vessels have been affected. Cracking has been isolated to assets with mineral wool insulation produced after 2003; however, a specific change to mineral wool composition in this timeframe has not been identified. The purpose of this paper is to provide a summary of incidents and investigations that have been reported to date and to update the environmental conditions (window of susceptibility) where insulation driven intergranular stress corrosion cracking has been observed. By drawing attention to this issue, it is the authors’ objective to increase awareness and determine if similar cracking incidents are occurring in other geographical regions.

Products tagged with 'mineral wool insulation'

Assessing Susceptibility of Insulation Materials to IGSCC under Hot and Wet Conditions: A Novel Test Method

External Stress Corrosion Cracking Of In-Situ Carbon Steel Pipelines

Implication Of Fractographic Analysis Of The In-Service Leak In An Above Ground Pipeline — Potential Role Of Hydrogen

Insulation Driven Intergranular Stress Corrosion Cracking of Carbon Steel

Association for Materials Protection and Performance