COURSE OVERVIEW:

The shell of a storage tank is subject to a variety of mechanical and environmental stresses that can lead to thinning, deformation, and loss of stability. This course focuses on the technical assessment of shell corrosion and geometric irregularities, such as out-of-roundness and peaking/banding at weld joints. Understanding these deviations is critical for maintaining the structural integrity of the tank and ensuring the smooth operation of internal floating roofs.

The scope of this training involves the measurement of shell thickness through Ultrasonic Testing (UT) and the evaluation of localized thinning using API 653 formulas. Participants will learn how to perform dimensional surveys to detect shell tilting, bulges, and deviations from circularity. We will explore the engineering implications of geometric flaws on the buckling strength of the tank, especially when subjected to wind loads or internal vacuum conditions.

Coverage includes the analysis of wind girder integrity and the assessment of shell-to-roof and shell-to-bottom junctions. The curriculum addresses the root causes of shell deformation, including foundation settlement and improper welding techniques during construction. By completing this program, delegates will be able to perform professional assessments of tank shells and provide technically sound recommendations for repair or continued operation.

COURSE OBJECTIVES:

After completion of this course, the participants will be able to:

• Identify the common corrosion patterns on tank shell interiors and exteriors.
• Calculate the remaining strength of a corroded shell using the "L" and "t2" formulas.
• Perform professional out-of-roundness surveys using laser or manual methods.
• Evaluate the impact of shell deformation on floating roof operation.
• Assess the severity of "peaking" and "banding" at shell weld joints.
• Analyze the verticality (plumbness) of the shell and its impact on stability.
• Differentiate between structural bulges and harmless cosmetic deviations.
• Inspect wind girders and stiffening rings for corrosion and attachment integrity.
• Determine the minimum required shell thickness for various liquid heights.
• Utilize API 653 criteria to accept or reject geometric irregularities.
• Recommend appropriate repair techniques for shell thinning and deformation.
• Document shell condition assessments clearly and professionally.

TARGET AUDIENCE:

This course is intended for Plant Inspectors, Integrity Engineers, Tank Farm Supervisors, and Civil/Mechanical Engineers involved in asset assessment.

TRAINING COURSE METHODOLOGY:

A highly interactive combination of lectures, discussion sessions, and case studies will be employed to maximize the transfer of information, knowledge, and experience. The course will be intensive, practical, and highly interactive. The sessions will start by raising the most relevant questions and motivating everybody to find the right answers. The attendants will also be encouraged to raise more of their questions and to share in developing the right answers using their analysis and experience. There will also be some indoor experiential activities to enhance the learning experience. Course material will be provided in PowerPoint, with necessary animations, learning videos, and general discussions.

The course participants shall be evaluated before, during, and at the end of the course.

COURSE CERTIFICATE:

National Consultant Centre for Training LLC (NCC) will issue an Attendance Certificate to all participants completing a minimum of 80% of the total attendance time requirement.