J.1_Scott-Fac 8734-Post Repair-Final-2022.pdf

US Army Corps of Engineers Omaha District

API 653 Repair Inspection Report – Final

Scott Air Force Base

Tank Number 34

US Army Corps of Engineers Center of Expertise for Petroleum, Oils and Lubricants

(USACE POL-MCX)

25 August 2022

Table of Contents

ACRONYMS AND ABBREVIATIONS

SUITABILITY FOR SERVICE MEMORANDUM

GENERAL TANK INFORMATION

TANK REPAIRS

1. Provide New Second Bottom

2. Remove and Replace Spiral Stairs

3. Remove and Replace Water Draw-Off System

4. Replace Thermal Relief System

5. Provide Scaffold Supports

6. Replace Grounding Systems

7. Provide Davit Arms

8. Repair Mechanical Tape Gauge

9. Replace Roof Access Manway

10. Repair Roof Perimeter Inspection Hatches

11. Modify the Low Suction Line

12. Miscellaneous Repairs

13. Replace Wiper Seals

14. Provide Tank Data Plate

15. Remove and Patch Tank Overflows

16. Hydrostatic Test

17. Repair Tank Coatings

APPENDIX A: BOTTOM PLATE THICKNESSES

APPENDIX B: ENGINEERING DRAWINGS

ACRONYMS AND ABBREVIATIONS

API

ASME

ASNT

ATG

American Petroleum Institute

American Society of Mechanical Engineers

American Society of Non-Destructive Testing

Automatic Tank Gauge

BBL Barrel

CFR Code of Federal Regulations

CP Cathodic Protection

DFT Dry Film Thickness

HLA High Level Alarm

HLCS High Level Control Shutoff

HHLA High-High Level Alarm

LLA Low Level Alarm

LLLA Low-Low Level Alarm

MFL Magnetic Flux Leakage

MT Magnetic Particle Testing

NACE National Association of Corrosion Engineers

NDT Non-Destructive Testing

NFPA National Fire Protection Association

PSI Pounds per Square Inch

PT Penetrant Testing

P/V Pressure/Vacuum

RP Recommended Practice

PST Product Saver Tank

RT Radiography Testing

TML Thickness Measurement Location

TRV Thermal Relief Valve

UFC Unified Facilities Criteria

UFGS Unified Facilities Guide Specifications

ULS Ultra-Low Sulfur

UT Ultrasonic Testing

VT Visual Testing

SUITABILITY FOR SERVICE

MEMORANDUM

STORAGE TANK NO. 34

Out-of-Service API 653 Tank Inspection and Repair

Contract No. W9128F-16-D-0028, Delivery Order No. W9128F21F0157 Scott Air Force Base, Illinois

Tank 34 was inspected 25 August 2022. An API 653 Repair Inspection was performed by Darrin Laughlin.

This tank report is an Appendix to the original API 653 tank report.

On this date 25 August 2022, the tank is in suitable condition for return to service.

Mandatory Repairs

No mandatory repairs were required.

Other Repairs and Maintenance

1. Provide new second bottom

2. Remove and replace spiral stairs

3. Remove and replace water draw-off system

4. Replace thermal relief system

5. Provide scaffold supports

6. Replace grounding systems

7. Provide davit arms

8. Remove mechanical tape gauge

9. Replace roof access manway

10. Repair roof perimeter inspection hatches

11. Modify the low suction line

12. Miscellaneous repairs

13. Replace wiper seals

14. Provide tank data plate

15. Remove and patch tank overflows

16. Perform Hydrostatic Test

17. Repair Coatings

Inspection Intervals

The next In-Service Inspection should occur in 5 years (August 2027) and the next UT thickness measurements should occur in 13 years (April 2035) in accordance with API 653.

The next Out-of-Service inspection should occur in 10 years (August 2032) per API 653 to establish corrosion rates for the new tank bottom.

This storage tank suitability for service evaluation has been completed in accordance with the requirements of API Standard 653, 5th Edition, Addendum 2, May 2020.

Prepared by:

Darrin A Laughlin US Tank Inspection Manager AmSpec API 653 Certified Inspector No. 29230

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner U.S. Air Force

Location Scott Air Force Base

Tank Number 34

State / Country Illinois / USA

City St. Clair County

Inspection Date 5/19/22

Tank Manufacturer Graver Tank and Manufacturing Co.

Design Standard API 12C (Assumed)

Date of Construction 1952

Tank Contents Jet Fuel (F-24)

Tank Diameter 35’-0”

Shell Height 27’ 9”

Product Height 23’ 2”

Tank Capacity 4,762 Barrels

Foundation Concrete Ringwall

Construction

Bottom 5/16”-Inch Lap-Welded Carbon Steel Plate

Shell Five butt-welded shell courses

Floating Roof Petrex Aluminum Floating Pan

Fixed Roof Cone Roof

Material

Bottom Unknown Carbon Steel

Shell Unknown Carbon Steel

Floating Roof Aluminum honeycomb

Fixed Roof Unknown Carbon Steel

Cathodic Protection Impressed Current

Interior Coating System Thin Film Epoxy

Exterior Coating System Epoxy/Polyurethane

Level Gauging Enraf ATG, Shand & Jurs Auto-gauge, 6” Vito water bottom probe, 8” manual gauge well

Overfill Protection High and High-High Level Alarms

Piping Receipt 8” Carbon Steel

Issue 10” Carbon Steel

Low Suction 4” Carbon Steel

Water Draw-Off 2”/1” Carbon Steel

Level Alarms Low-Low Level Alarm: 2’ 5-1/4” Low Level Alarm: 2’ 11-3/4” High Level Alarm: 20’ 5-1/8” High-High Level Alarm: 20’ 8-7/8”

Type of Internal Floating Roof Aluminum Honeycomb

TANK REPAIRS

1. Provide New Second Bottom

OBSERVATION: New second bottom installed with liner and cathodic protection. Low and low-low level alarms were also installed.

2. Remove and Replace Spiral Stairs

OBSERVATION: New spiral stairs installed and grounded.

3. Remove and Replace Water Draw-Off System

OBSERVATION: New water draw-off piping and valves installed.

4. Replace Thermal Relief System

OBSERVATION: New thermal relief system installed on issue, receipt and low suction lines.

5. Provide Scaffold Supports

OBSERVATION: Scaffold cable supports installed.

6. Replace Grounding Systems

OBSERVATION: New grounding lugs installed.

7. Provide Davit Arms

OBSERVATION: Davit arms installed on shell manways.

8. Repair Mechanical Tape Gauge

OBSERVATION: Mechanical tape gauge was repaired with a weight connection to the IFR.

9. Replace Roof Access Manway

OBSERVATION: New roof access hatch installed.

10. Repair Roof Perimeter Inspection Hatches

OBSERVATION: New galvanized chains installed at mid-rail height.

11. Modify the Low Suction Line

OBSERVATION: Internal flange installed and low suction line tied into suction line.

12. Miscellaneous Repairs

OBSERVATION: Broken latch on manual gauge well retrieval winch assembly repaired.

High-level control valve conduit modified to not contact control valve.

13. Replace Wiper Seals

OBSERVATION: Existing seals removed and replaced with wiper seals.

14. Provide Tank Data Plate

OBSERVATION: New tank data plate was installed.

15. Remove and Patch Tank Overflows

OBSERVATION: Overflows over stairs and shell nozzles removed and patched.

16. Hydrostatic Test

OBSERVATION: The tank was hydrostatically tested after the API 653 repairs were completed. No issues were observed.

17. Repair Tank Coatings

OBSERVATION: New internal coatings applied to roof, shell, bottom, and appurtenances.

External coatings repairs where modifications were made, and an overcoat of polyurethane was apply to the entire tank for color uniformity.

APPENDIX A: BOTTOM PLATE THICKNESSES

Plate Number Plate Locations Plate

Type Nominal Thicknes

Point Number

1 2 3 4 5

1 Sketch A 0.3125 0.324 0.324 0.320

2 Sketch E 0.3125 0.306 0.303 0.308 0.305 0.310

3 Sketch B 0.3125 0.320 0.322 0.324

4 Sketch E 0.3125 0.309 0.310 0.313 0.311 0.311

5 Middle E 0.3125 0.321 0.309 0.324 0.324 0.320

6 Sketch E 0.3125 0.307 0.309 0.310 0.310 0.309

7 Sketch E 0.3125 0.307 0.308 0.309 0.304 0.305

8 Middle E 0.3125 0.312 0.315 0.318 0.322 0.322

9 Sketch E 0.3125 0.307 0.308 0.309 0.313 0.311

10 Sketch E 0.3125 0.315 0.311 0.316 0.314 0.306

11 Middle E 0.3125 0.312 0.312 0.321 0.317 0.314

12 Sketch E 0.3125 0.310 0.309 0.312 0.309 0.308

13 Sketch C 0.3125 0.319 0.318 0.321

14 Sketch E 0.3125 0.304 0.304 0.309 0.306 0.304

15 Sketch D 0.3125 0.321 0.325 0.320

Note: The lowest UT measurements are in RED, and the highest UT measurements are in GREEN for each plate location (Sketch, Middle, and Annular)

APPENDIX B: ENGINEERING DRAWINGS