IPD offers certified API 653 tank inspection services for bulk storage, petroleum, & chemical storage tanks. In service and out of service tanks are inspected to maintain code compliance, evaluate corrosion, and identify mechanical damage, and foundation settlement. These services provide customers with valuable information that will aid in determining repairs and assessing continued operation of their tanks.
Maintaining tank inpections will increase plant reliablilty and reduce expensive repair costs.
Typical Services Include:
1. Base Report
2. Detailed Report
3. External Inspection
4. Internal Inspection
5. NDT (Non-Dest ructive Testing)

The Basic Report meets all API 653 requirements for an Out-of-Service inspection and includes:

•  Summary of conditions
•  General tank data
•  Significant findings
•  Detailed Inspection findings
•  Recommendations for return-to-service
•  Long-term recommendations
•  Floor map with UT measurements
•  Calculations (settlement, remaining thickness) if necessary, to support
    conclusions and recommendations
•  Photographs

DETAILED REPORT

The Detailed Report meets all API 653 requirements for an Out-of-Service inspection. The detailed report is an engineered document that includes calculations for wind loading, seismic loading, remaining shell thickness, and hoop stress. The Detailed Report includes:
Executive summary
Detailed list of inspection findings
Tank information and history
Detailed inspection findings
Discussion of significant tank faults
Suitability for service evaluation
Evaluation of structural and hydraulic integrity factors and risks
Detailed recommendations for short-term and long-term suitability for service
Engineering calculations
CAD shell drawings
CAD floor drawing
Photographs

EXTERNAL TANK INSPECTION:

This inspection includes all applicable items on the API 653, appendix C, in-service and out-of-service exterior checklist. The inspections are performed by certified API 653 inspectors/engineers. Inspection items include:
Visual inspection of bottom course shell joints
Shell mapping and defect location
Visual inspection of the shell for bulges and distortions
Foundation inspection
Ultrasonic spot inspection of shell and roof for nominal thickness
Roof visual inspection with spot ultrasonic testing
Visual inspection of appurtenances
Visual inspection of the tank for defects and evidence of leakage
Overall hydraulic and structural integrity survey of the tank
Tank plumbness, roundness, and dike volume surveys are optional

INTERNAL TANK INSPECTION :

This inspection includes all applicable items on the API 653, appendix C, out-of-service internal inspection checklist. The inspections are performed by certified API 653 inspectors/engineers. Inspection items include:
Visual inspection of the floor for evidence of leakage
Visual inspection of the shell for bulges and distortions
Floor mapping with location of columns and any defects
Visual inspection of the floor-to-shell weld and shell joints
Interior roof visual inspection
Visual inspection of floating pan
Visual inspection of interior appurtenances, nozzles and piping
Visual inspection of tank column bases and columns for plumbness
Tank shell and floor edge settlement survey
Overall hydraulic and structural integrity survey of the tank
Floor pit survey

NDT ( NON DESTRUCTIVE TESTING )

Industrial NonDestructive Testing of materials, weldments, piping, tanks, vessels,
Dye Penetrant - Provides visual evidence of integrity. A colored dye penetrates into an opening and is displayed against a contrasting color background. It is then measured and compared against industry standards.
Magnetic Particle - Used on ferrous metals and welds, this method sets up a magnetic field in the test specimen. A break in the magnetic field is indicated by the collection of applied iron particles that can be measured and evaluated against industry standards.
Magnetic Flux Leakage This method saturates a test specimen (tank floors) with a magnetic field. A quantitative analysis is conducted by detecting the magnetic field leak and comparing it against industry standards.
Leak Testing - Vacuum box, hydrostatic testing to find leaks in items that must be leak free, such as: pipelines, tank floors, and flu-gas duct liners.

VACUUM BOX INSPECTION:

This inspection includes vacuum box testing of all accessible floor welds and the floor-to-shell weld if conditions permit. The inspections are performed by Level II inspectors certified in accordance with ASNT-TC-1A. All suspect locations discovered are recorded on the floor map and marked on the floor for repairs.

ULTRASONIC INSPECTION:

This inspection includes ultrasonic testing of the tank shell and floor. The inspections are performed by Level II inspectors certified in accordance with ASNT-TC-1A. Services include:
Four ultrasonic readings on each shell plate in the first course.
A minimum of six ultrasonic readings on the rest of the courses in locations
  accessible from the tank stairs
A minimum of four ultrasonic readings on each tank floor plate
Recording of floor ultrasonic readings on a floor map
Additional 10" by 10" A-scan testing of low ultrasonic readings
Location of corrosion and metal loss areas on floor map

Magnetic Flux Exclusion (MFE) Inspection:

This inspection includes a scan of the tank floor with an MFE Industries Model 2412 MFE machine for backside corrosion. The inspections are performed by Level II inspectors certified in accordance with ASNT-TC-1A. Services include:
MFE inspection of all accessible areas of the floor. Inaccessible areas (excluded    from the report) include:
  3 inches within the shell, floor plate lap welds, base plates, sumps, underneath
  tank piping and appurtenances, and underneath columns.
A-scan follow-up testing.
Recording of floor MFE and ultrasonic indications on a floor map
Additional 10" by 10" A-scan testing of low ultrasonic readings
Location of backside corrosion areas on floor map