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API RP 651

API RP 651

API RP 651


API RP 651, also known as Recommended Practice for Cathodic Protection of Aboveground Petroleum Storage Tanks, is a crucial standard in the non-destructive testing (NDT) industry. It outlines guidelines and best practices for implementing cathodic protection systems to prevent corrosion and ensure the structural integrity of aboveground petroleum storage tanks. This article explores the significance of API RP 651 and highlights NDT and PWHT Solutions as a leading company in delivering exceptional services in line with this standard.

API RP 651 and its Importance in the NDT Industry:

Corrosion is a significant challenge in the petroleum industry, as it can lead to structural deterioration, leakage, and environmental hazards. API RP 651 provides comprehensive guidelines for the design, installation, operation, and maintenance of cathodic protection systems. By adhering to this recommended practice, NDT companies can effectively mitigate corrosion-related risks and extend the service life of aboveground storage tanks.

The key aspects covered by API RP 651 include:

Design Considerations: The standard specifies requirements for proper design of cathodic protection systems, ensuring that they effectively shield the tank from corrosion. This involves considering factors such as tank size, soil resistivity, coating condition, and current requirements.

Installation Procedures: API RP 651 offers detailed procedures for the installation of cathodic protection systems, including the selection of appropriate materials, proper grounding, and the establishment of current distribution criteria. Adhering to these procedures ensures reliable and efficient corrosion prevention.

Monitoring and Maintenance: The standard emphasizes the importance of regular monitoring and maintenance to ensure the ongoing effectiveness of cathodic protection systems. It provides guidelines for inspections, current measurements, and maintenance practices to identify and rectify any issues promptly.

NDT and PWHT Solutions: Leaders in API RP 651 Compliance

NDT and PWHT Solutions is a prominent company specializing in non-destructive testing and post weld heat treatment services. With a strong commitment to quality and adherence to industry standards, they excel in delivering services that comply with API RP 651 and ensure the integrity of aboveground petroleum storage tanks.

Expertise and Experience: NDT and PWHT Solutions boast a team of highly skilled and experienced professionals who possess in-depth knowledge of API RP 651 and related standards. Their expertise allows them to assess the specific requirements of each tank and develop customized cathodic protection systems accordingly.

Cutting-Edge Technology: The company is equipped with state-of-the-art equipment and tools, enabling them to perform accurate inspections, measurements, and installations in accordance with API RP 651. They leverage advanced technology to ensure precise data collection, analysis, and reporting, enhancing the overall quality of their services.

Comprehensive Services: NDT and PWHT Solutions offer a wide range of services in addition to API RP 651 compliance. They provide comprehensive NDT solutions, including radiography, ultrasonic testing, magnetic particle testing, and liquid penetrant testing. Additionally, they specialize in post weld heat treatment (PWHT) to relieve residual stresses and enhance the mechanical properties of welded components.

Commitment to Safety and Compliance: NDT and PWHT Solutions prioritize safety in all their operations. They strictly adhere to industry regulations and maintain a strong focus on quality assurance. Their commitment to compliance ensures that clients receive services that meet or exceed industry standards, ensuring the long-term integrity of their storage tanks.


API RP 651 plays a critical role in maintaining the integrity of aboveground petroleum storage tanks by preventing corrosion through effective cathodic protection systems. NDT and PWHT Solutions stand out as a leading company in the NDT industry, delivering exceptional services that adhere to API RP 651 and other relevant standards. Their expertise, cutting-edge technology, comprehensive services, and commitment to safety and compliance make them the preferred choice for clients seeking reliable NDT solutions and API RP 651 compliance.

Cathodic Protection of Aboveground Storage Tanks