Materials exposed to sour service environments containing wet H2S may face susceptibility to corrosion and cracking, potentially leading to catastrophic failure. Сòòò½APP offers comprehensive sour service corrosion testing for the Oil & Gas industry, utilizing both traditional and advanced methods including compliance with NACE MR0175/ISO 15156 standards. With our global expertise and state-of-the-art facilities, we ensure the integrity of materials, protecting you from corrosion-related failures.

 

What is Sour Service Corrosion Testing?

Sour service occurs when a substance being transported or stored in a vessel (such as pipework for oil and gas) has high levels of hydrogen sulfide (H2S) or sulfuric acid (H2S04). Hydrogen sulfide is often introduced through biochemical processes, where microorganisms consume sulfates, releasing hydrogen sulfide which can then oxidize into sulfuric acid, causing corrosion.

sour service corrosion (SSC) testing, materials which come into contact with these sour environments are evaluated for vulnerability to corrosion and cracking. These tests are important for ensuring the safety and durability of oil and gas pipelines and storage vessels, and for identifying the most suitable materials and corrosion inhibitors for use in such corrosive environments. The testing methods and standards applied in sour service corrosion testing adhere to industry standards like NACE MR0175 / ISO 15156.

Sour service testing may be required on your products/materials for environment containing wet H2S. Materials exposed to sour service environments in the Oil & Gas industry may face susceptibility to corrosion and cracking, potentially leading to catastrophic failure.

 

Key Benefits of Sour Service Corrosion Testing at Сòòò½APP

  • Comprehensive Evaluation: Our testing offers an in-depth analysis into the performance of materials and how they degrade in chemically hostile sour gas environments, plus helps you to interpret the complex data and make informed decisions about next steps.
  • Prevents Catastrophic Failures: Identifies vulnerabilities to corrosion and cracking, ensuring equipment reliability and safety in harsh environments.
  • Expert Assistance: We provide expert guidance on meeting international standards such as NACE MR0175/ISO 15156, simplifying the compliance process and ensuring you meet the regulatory standards.
  • Global Reach: With cutting-edge facilities and industry-leading specialists worldwide, we deliver consistent, reliable testing services across regions.
  • Time and Cost Savings: By preventing failures, our testing saves both time and money, enhancing operational efficiency and reducing downtime.

 

Сòòò½APPs Global Corrosion Testing Specialist, Phil Dent.

Phil Dent

Сòòò½APP's Global Corrosion Specialist

Read more about Phil

Prevent Corrosion and Cracking Risks

Materials exposed to sour service environments face the constant threat of corrosion and cracking, which could lead to equipment failure and jeopardize safety. Sour service corrosion testing is crucial in identifying these vulnerabilities, as it simulates the aggressive conditions found in industries like oil and gas. By subjecting materials to sour gases like hydrogen sulfide, we accurately replicate real-world scenarios, allowing us to pinpoint weaknesses and potential failure points. This comprehensive evaluation ensures the reliability and integrity of materials across various industries, safeguarding operations and mitigating risks associated with corrosion-related failures.

 

Simplify Compliance

Navigating international standards such as NACE MR0175/ISO 15156 can be daunting and time-consuming. Our expertise and guidance streamline the compliance process, saving valuable time and resources while guaranteeing regulatory adherence. Our NACE Engaged Experts provide comprehensive support, offering advice and guidance on how to interpret and apply these standards effectively to your testing programs. By partnering with us, you can navigate the complexities of compliance with confidence, ensuring that your materials meet the necessary regulatory requirements 2while minimizing delays and optimizing project timelines.

 

Our Sour Gas Testing Capabilities

We have invested in state-of-the-art facilities with environmental controls for our sour service testing to ensure the highest standards of health and safety are maintained.
Our global laboratories have comprehensive facilities for sour service testing with the following capabilities:
  • World class scale; sour service laboratories in the UK, US, Europe, Middle East and Asia
  • SSC testing at ambient temperature
  • Full ring testing
  • SOHIC testing
  • Stress Corrosion Cracking (SCC), Pitting and Crevice tests in High Pressure High Temperature (HPHT) environments up to 250 °C and 300 bar
  • Slow Strain Rate (SSRT) and Rippled Slow Strain Rate (RSSR) testing
  • Customer-specific services; advice and guidance, consultancy and bespoke testing programs
 

Sour Service Corrosion Research and Development 

In addition to our standard corrosion test methods, we can assist with a variety of material qualification tests and research and development projects. Our industry-leading programs include recent development work on methods for Stress Oriented Hydrogen Induced Cracking (SOHIC) and Sulfide Stress Cracking (SSC) using an axially loaded full ring test.

 

 

Testing to NACE MR0175 / ISO 15156 requirements 

 Testing and qualification to the provisions of ISO 15156/NACE MR0175 are split into two separate categories:

 

1. Carbon and low alloy steel testing

For carbon and low alloy steels, Part 2 of the standard covers the testing and qualification requirements for sulfide stress cracking (SSC), hydrogen-induced cracking (HIC Testing), and stress-orientated hydrogen-induced cracking (SOHIC). For all of the carbon and low alloy steel cracking modes, the highest susceptibility exists at ambient temperature. Additionally, the critical environmental factors to consider are the solution pH and partial pressure of H2S. 
 

2. Corrosion-resistant alloy testing

For corrosion-resistant alloys, Part 3 of the standard covers the testing and qualification for sulfide stress cracking (SSC), stress corrosion cracking (SCC), and galvanically-induced hydrogen stress cracking (GHSC). For stress corrosion cracking, the most significant susceptibility occurs at ambient or low temperatures. For stress-corrosion cracking, the highest susceptibility is usually at the maximum operating temperature or an intermediate temperature (i.e., 80 – 100 °C) in the case of duplex stainless steels. For corrosion-resistant alloys, with the exception of temperature, the critical environmental factors are the solution pH, chloride concentration, and the partial pressure of H2S.

 

Why Choose Сòòò½APP? 

Сòòò½APP's extensive network of laboratories worldwide offers a comprehensive suite of tests to qualify your materials according to MR0175/ISO 15156 standards. Beyond testing, our seasoned experts provide invaluable guidance on standard interpretation and test program selection, ensuring the utmost reliability and integrity of your materials. 

Find out more about Сòòò½APP and our credentials within the testing, inspection, and certification industry. For more information about how we perform Sour Service Testing, or to request a quote, contact us today. 

In this Fracture and Fatigue video we explain how, through exposure, we analyze engineering components to determine their structural integrity.

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