Maintenance subsections.
The Corrosion Data section of the Settings Menu allows you to see how the Corrosion data is configured. The configurations include maintenance of calculation methods, inspection methods, measurement points, reading requirements and the renewal basis.
Calculation Method
Here the Calculation Methods can be viewed/edited/added/deleted.
Damage Morphology
Here Damage Morphologies can be viewed / edited / added / deleted by users with the CSA or INS ADMIN roles.
For each Damage Morphology, besides the Name, a Label must be defined. The Label is what is shown in the grids across IMS, as the full Name is not displayed. It is recommended to assign a distinct Color to each Damage Morphology, using the color picker, to make them easier to differentiate visually.
A Damage Morphology can be recorded as a part of the inspection process at the CML level, on the Circuit Details Page in the Measurement Set section
Inspection Method
Here the Inspection Methods can be viewed/edited/added/deleted.
An Inspection Method can be specified per CML on the Circuit Details Page, in the CML grid.
The following Inspection Methods has been pre-defined in IMS:
Inspection Method | Description |
|---|---|
ARB | Arbitrary. |
AUT | Automated Ultrasonic. |
B-SCAN | Ultrasonic with Brightness amplitude scan. |
EDDY CURRENT | Eddy Current. An electromagnetic testing method. |
ID/OD | Inner Diameter / Outer Diameter. |
IRIS | Internal Rotary Inspection System. This is an ultrasonic non-destructive testing (NDT) method. |
MAN | Manual Measurement. |
NOM | Nominal Wall Thickness. |
RFEC | Remote Field Eddy Current. |
RT | Radiograph Testing. |
UT | Ultrasonic Testing. |
UT-R | UT (Ultrasonic Testing) with RT (Radiagraph Testing) Validation |
UTS | Ultrasonic Thickness testing. |
UTSA | Ultrasonic Thickness testing - Ax. shear probe width (legacy). |
UTSB | Ultrasonic Thickness testing - Probe width shear 1 min (legacy). |
UTSR | Ultrasonic Thickness testing - Rad. shear probe width (legacy). |
UTSRA | Ultrasonic Thickness testing - Ax/Rad. shear probe width (legacy). |
Measurement Point
Here, the Measurement Points can be viewed/edited/added/deleted. A selection of these can then be assigned to a CML Type (see CML Type). Thereafter a MP Configuration (see MP Configuration) can be created for that CML Type by linking the selected MPs to selected Matrix Locations (see Matrix Location).
Reading Requirement
Here, the Reading Requirements can be viewed/edited/added/deleted.
Renewal Basis
Here, the Renewal Basis categories can be viewed/edited/added/deleted.
TMIN Calculators
Here, the IMS TMIN Calculators can be used to determine the Minimum Required Thickness (TMIN) for Pressure Equipment Components. The calculators are organized in two equipment groups: Vessel and Heat Exchanger, and Piping. A total of 10 TMIN calculators are provided.
The first three calculators in the Vessel and Heat Exchanger group, namely Cylindrical Shell, Cylindrical Tube, and Nozzle Neck, each perform two separate calculations. They calculate TMIN for both Circumferential (Hoop) Stress and Longitudinal Stress. Both intermediate results are presented. The final minimum required thickness (TMIN) is the greater value obtained from the two results.
The remaining 7 calculators perform one calculation and directly display the Minimum Required Thickness (TMIN).
The table below describes the parameters necessary for the calculators:
| Item | Description |
|---|---|
| Internal Design Pressure (P) | The maximum expected operating internal pressure (in bar or psi) that the equipment must safely withstand. |
| Inside Radius (R) | The radius measured on the inside surface of the pressure boundary for the specific equipment or component. |
| Maximum Allowable Stress (S) | The allowable stress value from the material specifications or design code for your equipment in bar or psi. |
| Joint Efficiency (E) | The joint efficiency factor (0 < value ≤ 1) based on the weld type and inspection quality of your equipment’s welded joints. |
| Outside Diameter (D) | The total external diameter of the pressure boundary for the specific equipment or component, in mm or inches. |
| Inside Spherical or Crown Radius (L) | The internal radius of the spherical portion or crown of the vessel/head, in mm or inches. |
| Coefficient | The coefficient representing the effect of the bend or elbow geometry on stress or pressure loss. |
| Bend Radius of Welding Elbow or Pipe Bend (R1) | The radius of the bend as the centerline radius of the elbow or pipe bend in mm or inches. |
Calculating TMIN Using the Calculators
To calculate the Minimum required Thickness (TMIN) in the relevant calculator for your Component (e.g., CYLINDRICAL SHELLS, HEAD ELLIPSOIDAL, etc.):
- Enter values in the appropriate Unit System: Imperial or Metric. Note: Fill in all input fields displayed on the form. Only positive numeric values greater than zero are accepted. No letters, symbols, or zero/negative numbers are allowed.
- Click Calculate.
The results will appear below the input fields.
To erase all the input fields and clear the result, click Reset.