coastal diesel storage tank - clemson...

APPLIED TECHNICAL SERVICES, INC.

Corporate Office: Marietta, GA • Branch Offices: Birmingham, AL • Mobile, AL • Jacksonville, FL • Augusta, GA • Savannah, GA • Louisville, KY • Baton Rouge, LA Shreveport, LA • Wilson, NC • Charleston, SC • Columbia, SC • Greenville, SC • Chattanooga, TN • Memphis, TN • Arlington, VA • Chesapeake, VA • Rockville, VA

1049 Triad Court, Marietta, Georgia, 30062 • (770) 423-1400 Fax (770) 514-3299 • www.atslab.com

of 11 ATS450, 4/18/12 Proprietary Document

Mechanical Integrity Report for the

Coastal Diesel Storage Tank

at

208 North Palmetto Boulevard

Clemson, South Carolina 29631

Inspection: 23 September 2012

Prepared by: George E. Matthews, E.I.T. Senior Consultant

Reviewed by: Jeremy M. Orr, P.E., C.W.I. Principal Engineer - Manager

Purchase Order Number: CU00134445 ATS Job Number: 187436




Table of Contents


Table of Contents General Information, Background, Equipment Orientation and Access

Page 3

Present Condition and Analysis Page 4 Action Items Page 6 Future Inspections, Personnel Qualifications and Reference Industry Codes and Standards

Page 7

Photographs Page 8 Appendix A: NDE Report Appendix B: Calculations




General Information, Background, Equipment Orientation and Access


Design Pressure Unknown Design Temperature Unknown Operating Pressure Atmospheric Operating Temperature Ambient

Contents Diesel Specific Gravity .083 Shell Height / Length 10 feet 7 inches Diameter 4 feet Manufacturer Pee Dee Tank Year Constructed Unknown Serial Number Not applicable UL Number C-844308 Material Unknown Carbon Steel Previous Inspection None Drawing(s) None

NDE Performed by George Matthews (VT) Peter Dudley / Joey Laprade (UTT)

Background This report contains the results of the inspection, analysis and action items regarding the Coastal Diesel Storage Tank. The inspection included an external visual inspection and NDE to the accessible portions of the tank. Equipment Orientation The zero references as discussed in this report were as follows: • The tank was oriented beginning with 0° at the top of the shell as viewed from the head

and progressing to 360° in a counter-clockwise direction (refer to the roll-out in Appendix A).

• All nozzles and manways were individually oriented with 0° at the top of the individual nozzle and manway necks (towards the top of the tank) and progressed to 360° in a counterclockwise direction.

Equipment Access No access equipment was required for the inspection.

Overall View




Present Condition and Analysis


External Present Condition Coating failure was observed throughout. Minor general surface corrosion was observed at areas of coating failure. A NPT 2 normal vent was located at nozzle N3. A NPT 4 and NPT 6 emergency vent was located at nozzles N6 and N7, respectively. A NPT 6 secondary emergency vent was located at nozzle N5. No visible deterioration or damage was observed. No grounding cable was located. Interstitial Space Present Condition The interstitial space was not accessible. A limited inspection was performed as accessible from the inspection tube at nozzle N1 to look for moisture. Moisture was observed at the bottom of the inspection tube. Analysis The tank was analyzed as STI SP001 Category 1 for the operating parameters as provided by the client. No deficiencies were found during the inspection or analysis that would prohibit the continued use of the tank in the current service. A summary of the ultrasonic thickness measurements is located in the Summary of Thickness Measurements table that immediately follows. The completed NDE Report is located in Appendix A. The calculations summary is located in Appendix B. Calculated minimum required thicknesses are exclusive of any corrosion allowance.




Present Condition and Analysis


Summary of Thickness Measurements

0.135 0.137 0.135 0.0930.105 0.108 0.103 0.0930.105 0.108 0.104 0.0930.135 0.139 0.135 0.093

Corrosion rates and remaining life calculations were not performed for secondary containments. Within 10% of Minimum Required

Corrosion Rate

(inches/year)

Remaining Life

(years)

Minimum Required Thickness (inches)

At Minimum Required or Below

Shell Course 1Shell Course 2

South Head

Legend> 10% Above Minimum Required

Assumed, per STI SP001 7.2.4.

Minimum Measured Thickness (inches)

ComponentPrevious

Thickness (inches)

Average Measured Thickness (inches)

North Head




Action Items


Action Items The following are the prioritized action items based on the observations and findings at the time of the inspection: No. Item Priority

1 Drain and clean the interstitial space to prevent accelerated deterioration of the carbon steel tank components. Investigate the liquid contents of the secondary containment and the source of ingress. Repair as needed.

2

2 The carbon steel components should be cleaned and coated to prevent

further deterioration. 3

3 Grounding should be verified or installed. 3

Legend

Priority 1 High likelihood and consequence of failure. Critical Code or Standard deficiency. May not be fit for continued service without repair.

Priority 2 Medium likelihood and consequence of failure.

Priority 3 Low likelihood and consequence of failure. Non-critical Code or Standard deficiency. Industry best practice or preventative maintenance. Housekeeping items.



1049 Triad Court, Marietta, Georgia, 30062 • (770) 423-1400 Fax (770) 514-3299 • www.atslab.com Future Inspections, Personnel Qualifications and Reference Industry Codes

and Standards


Future Inspections Per STI SP001 Table 5.5 for Category 2 tanks, further external inspections are not required. The tank should be periodically inspected by a competent person, per the guidelines in STI SP001 Section 6. According to the Clemson University Spill Prevention Control and Countermeasure (SPCC) Plan, the tank should be re-inspected within 10 years. Personnel Qualifications Jeremy M. Orr SC PE # 27219 API 653 # 27205 STI # AC11307

GA, AL, ME, FL, LA, TX, SC, CA registered Professional Engineer; Mechanical Engineer with 13 years experience in inspection, evaluation, repair and design in various industries; AWS CWI, API 653 / 510 / 570 / 580 / 571/ 577 certified; STI certified inspector; NACE coating inspector level I certified; ASNT certified level II VT; SPRAT level I certified rope access technician; ATS certified Level II UTT, MT, PT, VT per SNT-TC-1A; active member of TAPPI, AWS, NACE International, ASME

George E. Matthews GA Registered Engineer-in-Training, Mechanical Engineer with 3 years experience in inspection, evaluation, repair and design in various industries

Jesse B. Showalter GA Registered Engineer-in-Training, Mechanical Engineer with 3 years experience in inspection, evaluation, repair and design in various industries

Peter Dudley ATS certified Level II UTT, MT, PT per SNT-TC-1A Joey Laprade ATS certified Level II UTT, MT, PT per SNT-TC-1A Reference Industry Codes and Standards Clemson University, Spill Prevention Control and Countermeasure Plan STI SP001, Standard for the Inspection of Aboveground Storage Tanks UL 142, Steel Aboveground Tanks for Flammable and Combustible Liquids




Photographs


Photo 1: Overall view of the tank.

Photo 2: View of UL nameplate.




Photographs


Photo 3: View of coating failure.

Photo 4: View of minor general surface corrosion at coating

failure.




Photographs


Photo 5: View of inspection tube at nozzle N1 on the South

head.




Photographs


Photo 6: View of emergency vents at nozzles N6 and N7.

Photo 7: View of minor general surface corrosion at coating

failure on support leg.

Corporate Office: Marietta, GA • Branch Offices: Birmingham, AL • Mobile, AL • Jacksonville, FL • Augusta, GA • Savannah, GA • Louisville, KY • Baton Rouge, LA

Minor general surface corrosion was observed at areas of coating failure.

Minor coating failure throughout.

Minor general surface corrosion was observed at areas of coating failure.South Head

Shell

Insulation / Coating


Condition / Comments

Minor general surface corrosion was observed at areas of coating failure.North Head

APPLIED TECHNICAL SERVICES, INC.Shreveport, LA • Wilson, NC • Charleston, SC • Columbia, SC • Greenville, SC • Chattanooga, TN • Memphis, TN • Arlington, VA • Chesapeake, VA • Rockville, VA

Component

Appendix A: NDE Report

External Visual Inspection:

ATS460, 4/18/12 Coastal Diesel Storage Tank Calculations.xls

Notes:

Not applicable.

Not applicable.

Grounding Cable

Weld Seam

Jacket / Coils

Support System

Floor Plate Extension

None located

Anchor Bolt / Saddle / Lug

Nozzle / Manway / Repad

Relief / Vent


A NPT 2 normal vent was located at nozzle N3. A NPT 4 and NPT 6 emergency vent was located at nozzles N6 and N7 respectively. A NPT 6 secondary emergency vent was located at nozzle N5. No visible deterioration or damage was observed.

No visible deterioration or damage



Interstitial Space Double walled. Limited access from inspection tube at nozzle N1. Moisture was observed at the bottom of the inspection tube.






North Head:

Plan View: (AS SEEN FROM ABOVE)

South Head:

Rollout / Nozzle Locations (NOT TO SCALE):


Shell:Elevation View:


North Head:

1.6 0.093

0.093

0.093

0.093

0.139

0.093 0.136

0.136

0.137

0.135

0.135

0.141

0.093

0.093 0.138

0.093

0.137

0.136


Distance Across (feet)


0.136 0.139

0.135

0.137

0.137

1.1

1.9

1.1

0.6

1.9

0.137

1.6

0.1

Shreveport, LA • Wilson, NC • Charleston, SC • Columbia, SC • Greenville, SC • Chattanooga, TN • Memphis, TN • Arlington, VA • Chesapeake, VA • Rockville, VACorporate Office: Marietta, GA • Branch Offices: Birmingham, AL • Mobile, AL • Jacksonville, FL • Augusta, GA • Savannah, GA • Louisville, KY • Baton Rouge, LA



Ultrasonic Thickness Measurements:

0 to 180° Minimum Measured Thickness (inches)

0.137

0.1 0.093 0.137


0.6 0.093

0.139

0.136


Legend> 10% Above Minimum Required

Within 10% of Minimum Required



South Head:


1.9

0.6 0.093

0.093

0.1

1.6 0.093

1.1 0.093

0.093

Ultrasonic Thickness Measurements:

Distance Across (feet)



Shreveport, LA • Wilson, NC • Charleston, SC • Columbia, SC • Greenville, SC • Chattanooga, TN • Memphis, TN • Arlington, VA • Chesapeake, VA • Rockville, VA



0.141 0.137

0.1 0.093 0.135 0.137

0.137 0.137

1.1 0.093 0.142 0.138

1.9 0.093

1.6 0.093 0.144 0.141

0.6 0.093

0.139 0.136

0.138 0.142

0.140 0.141

0.137 0.136

0.142 0.137





> 10% Above Minimum Required


Legend



> 10% Above Minimum Required



Legend

Shreveport, LA • Wilson, NC • Charleston, SC • Columbia, SC • Greenville, SC • Chattanooga, TN • Memphis, TN • Arlington, VA • Chesapeake, VA • Rockville, VA


Elevation (feet)


Secondary Containment Shell Ultrasonic Thickness Measurements:


0.1060.105

0.109

0.1080.108

0.109

0.109

0.108

0.1120.106

0.105

0.109

0.105

0.1080.106

0.106

0.1050.1060.113

0.1122.5 0.1040.110

0.1111.40.2

0° Minimum Measured Thickness (inches)

0.0930.093

0.1120.093

6.55.3

0.1103.7

0.093

0.0930.093

9.1 0.093

4.9 0.1090.105

0.114

7.80.1130.112

10.4 0.103

0.0930.0930.093 0.106

0.106

0.1120.109

0.107

0.111

0.108

0.1080.110







Notes:D Threaded





Nozzles / Manways / Reinforcement Ultrasonic Thickness Measurements:


N8 2 48 D DNone N/A

D None N/AUnknownUnknown

UnknownN6 4 48 D D

None N/ANone N/A

N7 6 48 D

D DD

D DUnknown

N4 2 48 DN5 6 48 D

N/A Unknown

N/A UnknownN/A UnknownD D

D NoneNone

DN3 2 48 D

None2 D N/A UnknownN2 2 48 D D D None

D

Nozzle NPS Elevation (inches) Thickness

(inches)

Reinforcement Pad

N1 2

Nozzle Thickness (inches) Internal Projection (inches)0° Scan 180° Width

(inches)

D


Horizontal Construction (with flat heads)

Secondary Containment Capacity = U.S. gallons

Where:D =L = (cannot be greater than 6 times D)

Actual Capacity = U.S. gallonsWetted Surface Area (horizontal) = ft2 (assumes flat heads)

Normal Venting

in. (per UL 142, Section 13)

Secondary Containment Minimum Design Thickness = 0.093 in. (per UL 142, Section 21)

Diameter of Tank (ft.) = 4.00Length of the Tank (ft.) = 10.58

Primary Containment Minimum Design Thickness = 0.123

UL 142: MINIMUM THICKNESS (s.g. less than or equal to 1.0)

APPLIED TECHNICAL SERVICES, INCORPORATEDCorporate Headquarters • 1049 Triad Court, Marietta, Georgia 30062 • 770.423.1400 • Fax 770.514.3299 • www.atslab.com

APPENDIX B: CALCULATIONS SUMMARY

995 (calculated)

UL 142: VENTING

995119

Normal Venting

Minimum Opening = NPS (per Table 8.2)

A vent opening must be in addition to the fill, withdrawal and liquid level gauge openings.The normal vent must be at least as large as the filling or withdrawal connection, whichever is larger.

Emergency Venting (Primary and Secondary Containments)

Horizontal Minimum Opening = NPS (per Table 8.1)

The pipe size applies to lengths of not more than 12 in.Emergency vents are not prohibited from use for normal venting.

1 1/4

4

Proprietary Document Page 1 of 2

The tank was supported by non-standard saddles. The geometry of the saddles could not be analyzed without performing a finite element analysis (FEA). No damage to the tank shell was observed at the saddle attachment locations.

APPLIED TECHNICAL SERVICES, INCORPORATEDCorporate Headquarters • 1049 Triad Court, Marietta, Georgia 30062 • 770.423.1400 • Fax 770.514.3299 • www.atslab.com

APPENDIX B: CALCULATIONS SUMMARY UL 142: SADDLES

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