Inspection and Analysis of DEFORMATIONS in Storage Tanks Using 3D Laser Scanning
Ejemplo de tanque escaneado
3D laser scanning technology allows us to capture large storage tanks in three dimensions, generating point clouds made up of millions of points with x, y, z coordinates. This makes it possible to obtain real and reliable metric information of the equipment, with high precision in relevant dimensional and geometric data, from which we can perform dimensional, deformation, verticality, and settlement analyses, among others.
Example of internal tank scan visualization in RECAP
At ANSI, we use a storage tank evaluation methodology based on laser scanning tools, which allows us to obtain highly valuable information for our clients, generating from the point clouds:
- Verticality of the tank walls.
- Concentricity and deformations of the shell rings.
- Evaluation of roof and beam geometry.
- As-built designs.
- Settlement evaluation.
Examples of information obtained after deformation analysis.
Laser scanner analysis allows us to carry out data collection in the field with great agility, capturing a large amount of information in each scanning cycle. Typical measurement errors that occur with conventional systems are eliminated, and the risks associated with working inside the tanks are minimized. The point clouds are analyzed and processed in our offices using specific software and methodologies for each case.
Examples of information obtained after deformation analysis.
In addition to geometric information, the 3D point cloud also provides a visual representation of the scanned object due to the high density of measurements obtained, allowing us to generate a virtual 3D model of the tank.
As part of our storage tank inspection services, we can include:
- Laser mapping of the tank’s interior and/or exterior.
- External aerial inspection using drones.
- 3D CAD modeling of the inspected equipment.
- Analysis and generation of inspection documentation.
- Generation of as-built drawings of the equipment.
- Generation of tank calibration tables.
- FFS studies, based on standards such as API 579.
- Evaluation of modifications, throughout the life of the equipment.
- Verification of the status and scope of modifications or repairs carried out.
Fitness for Service (FFS) Studio
The analysis of the equipment’s ability to remain in service is carried out through a Fitness for Service (FFS) study, which evaluates the mechanical integrity of a tank that has suffered certain damage or exhibits structural failures that cast doubt on its operational capacity. This FFS analysis is applicable not only to tanks designed according to API standards but also to pressure equipment and piping designed under ASME regulations.
It is essential to understand the damage mechanisms and their possible interactions in order to carry out an appropriate fitness-for-service assessment. Other damage mechanisms, besides major distortions that compromise the equipment’s in-service performance, include localized and general material loss, corrosion, crack formation, laminations, weld misalignments, and others.
Detail of bottom deformations
KEY BENEFITS OF OUR ANALYSIS METHODOLOGY:
- Obtaining critical information with a complete, real and current vision, which is also comparable and lasting over time.
- Capture of millions of points, with all perimeter elements.
- Point clouds importable in CAD software, for engineering work.
- It ensures that the necessary information has been captured, avoiding the risk of having to take further action.
- Inspection prioritization.
- Better planning of the work to be executed.
If you have a project in which you need to analyze a storage tank, obtain its real dimensions, evaluate its deformations, generate the ASBUILT....., do not hesitate to contact us.
