INTER SPEC, LLC - LoopNet...Gary G. Boley, Senior Inspector, API-653 # 020, API-570 # 267, API-510 #...

ER-PENINSULA OIL-WILCO, DE-TANK#1-APRIL/2007

INTER SPEC, LLC Environmental Inspections Services 757-622-6299 / Office 312 West 24

th Street, Norfolk, VA 23517 757-622-9103 / Fax

www.interspecllc.net 1-800-546-7853 / Toll Free

Engineering Report – Tank # 1

Prepared for

PENINSULA OIL; Wilco, DE

April 10, 2007

API Standard 653 recommends this document

containing valuable historical information be

retained for the life of the tank.

Signature(s):

__________________________________________________________________

Gary G. Boley, Senior Inspector, API-653 # 020, API-570 # 267, API-510 # 2659

http://www.interspecllc.net/


EXECUTIVE SUMMARY

An API Standard 653 In-Service inspection of Tank # 1 was completed on April 10, 2007 to

evaluate the tank’s integrity, collect data, and establish a data base for future inspections and

evaluations. A shell service life evaluation performed on the tank shell shows the shell as having

greater than 20 years of remaining life under current conditions. Inspection Results are listed in

section 4.1. Recommendations are listed in section 4.2. All engineering calculations are

provided in Appendix A.


CERTIFICATION

The following certification pertains to the inspection of Tank # 1 located at the PENINSULA

OIL facility in Wilco, DE on April 10, 2007.

“I certify under penalty of law that this document and all attachments were prepared by me. The

information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I

am aware that there are significant penalties for submitting false information, including the

possibility of fines and imprisonment for knowing violations.”

Signature:

__________________________________________________________________

Gary G. Boley, Senior Inspector, API-653 # 020, API-570 # 267, API-510 # 2659


TABLE OF CONTENTS

1.0 Introduction

1.1 Purpose

2.0 References

2.1 American Petroleum Institute

2.2 American Society of Mechanical Engineers

2.3 Code of Federal Regulations

2.4 National Association of Corrosion Engineers

2.5 National Fire Protection Association

2.6 Underwriters Laboratories Inc

3.0 Tank Description

4.0 Inspection

4.1 Results

4.2 Maintenance Recommendations

4.3 Compliance Requirements

4.4 Serviceability

Appendices

A Engineering Calculations

B Engineering Data

C Engineering Drawings

D API Checklists

E Photographs


1.0 INTRODUCTION

1.1 Purpose:

1.1.1 This report provides an engineering evaluation of Tank # 1 located at the

PENINSULA OIL facility in Wilco, DE. This report summarizes the results of an

inspection meeting the requirements of API Standard 653 conducted by InterSpec,

LLC. The inspection was completed on April 10, 2007.


2.0 REFERENCES

2.1 American Petroleum Institute:

2.1.1 Standard 650, Welded Steel Tanks for Oil Storage

2.1.2 API Standard 653, Tank Inspection, Repair, Alteration, and Reconstruction

2.1.3 API RP 652, Lining of Aboveground Petroleum Storage Tank Bottoms

2.1.4 API RP 651, Cathodic Protection of Aboveground Petroleum Storage Tanks

2.1.5 RP 575, Inspection of Atmospheric and Low-Pressure Storage Tanks

2.1.6 API RP 577, Welding Inspection and Metallurgy

2.1.7 RP 2000, Venting Atmospheric and Low Pressure Storage Tanks

2.1.8 API RP 570, Piping Inspection Code: Inspection, Repair, Alteration, and

Rerating of In-Service Piping Systems

2.2 American Society of Mechanical Engineers Codes:

2.2.1 ASME Boiler and Pressure Vessel Code; Section V, Non-Destructive

Examination

2.2.2 ASME Boiler and Pressure Vessel Code; Section IX, Welding and Brazing

Qualifications

2.3 Code of Federal Regulations:

2.3.1 29 CFR 1910, Process Safety Management

2.3.2 40 CFR 112, Pollution Prevention Regulations

2.4 National Association of Corrosion Engineers:

2.4.1 NACE Recommended Practice, RP0184-91, Repair of Lining Systems

2.4.2 NACE Recommended Practice, RP0193-93, External Cathodic Protection of

On-Grade Metallic Storage Tank Bottoms

2.4.3 NACE Recommended Practice, RP0288-94, Inspection of Linings on Steel

and Concrete

2.5 National Fire Protection Association:

2.5.1 NFPA-30, Flammable and Combustible Liquids Code

2.5.2 NFPA-70, National Electrical Code

2.6 Underwriters Laboratories Inc:

2.6.1 UL-142, Steel Aboveground Tanks for Flammable and Combustible Liquids


3.0 TANK DESCRIPTION

3.1 Tank Description:

Owner/Operator: PENINSULA OIL

Location: Wilco, DE

Tank Number: 1

Service: Fuel Oil

Diameter: 45.00 feet

Shell Height: 35.92 feet

Capacity: 427,319 Gallons

Configuration: Vertical

Foundation: Earthen

Construction:

Bottom: N/A

Shell: Butt-Welded

Roof: Lap-Welded

Material:

Bottom: Carbon Steel, Unknown Grade

Shell: Carbon Steel, Unknown Grade

Roof: Carbon Steel, Unknown Grade

Built: Circa 1950

Age: Approximately 57 years

Specific Gravity: 0.90

Operating Limits:

Minimum Metal Temperature: Ambient

Maximum Metal Temperature: 200 ˚F

Minimum Pressure: Atmospheric (no vacuum)

Maximum Pressure: Product

Seismic Zone: 1

Construction Code: API-12C

Inspection Type: API-653 In-Service

Inspection Date: April 10, 2007

Inspector(s): Gary G. Boley, Thomas J. Crowe, Kevin T. Grant


4.0 INSPECTION

4.1 Results:

4.1.1 Foundation: The tank sits on an earthen foundation. The foundation was

visually evaluated during the inspection. Areas of the foundation and lower shell-to-

bottom area are covered with dirt. The foundation is in satisfactory condition.

4.1.2 Containment: The tank sits in an earthen containment floor with earthen dike

walls. The top of the earthen containment wall is two feet or more with properly sloped

walls as per NFPA-30. The containment is sloped to allow for drainage away from the

tank as per the requirement of NFPA-30. The containment was visually evaluated during

the inspection. The size of the containment is of sufficient size to contain a total tank

loss. The containment is structurally sound. The containment has small amounts of

debris present. The containment is in satisfactory condition.

4.1.3 Bottom: The tank bottom was not evaluated during this inspection.

4.1.4 Shell: The shell is constructed of carbon steel. The shell is a butt welded

design consisting of five (5) courses. Visually inspected the exterior of the shell.

Inspected the coating for disbonding, adhesion, deterioration, and discoloration with

minor coating failure present. The shell was evaluated for remaining metal thickness

utilizing ultrasonic technology. Thickness measurements are listed in the engineering

data in Appendix B. A shell service life evaluation performed shows the shell with > 20

years of remaining life under current conditions. The engineering calculations, as per

API Standard 653, for the shell service life evaluation are shown in Appendix A under

“Shell Service Life Evaluation”.

4.1.5 Roof: The roof is constructed of carbon steel. The roof is a cone up lap welded

design consisting of thirty (30) plates. Evaluated the roof nozzles. Inspected the vents.

Inspected the gauge hatch cover and latch, checked for proper seal integrity and cover

operation. Measured the general thickness throughout the roof utilizing an ultrasonic

thickness tester. Thickness measurements are listed in the engineering data in Appendix

B.

4.1.6 Appurtenances: Inspected and evaluated each shell nozzle. Indentified the

type and use of each shell nozzle. Measured the nozzle neck thickness on all accessible

shell nozzles. Evaluated all nozzles and reinforcement plates for leaks and corrosion with

no discrepancies present. Evaluated the ATG and its operation. Inspected the spiral

stairway. The tank has means of grounding via ground straps. Evaluated the handrails,

platforms and frames for corrosion and structural soundness, their conditions are

satisfactory.

4.1.7 Painting/Insulation: The tank shell, roof, stairway, handrails, piping, and

appurtenances are coated. Minor coating failure is present on the shell, stairway,

handrails, piping, and appurtenances. Near total coating failure with primer exposed is

present on the roof. Minor corrosion is present where primer has failed.


4.2 Maintenance Recommendations:

4.2.1 Foundation: Remove dirt away from the foundation area of the tank.

4.2.2 Containment: Remove debris from the containment area.

4.2.3 Bottom: None.

4.2.4 Shell: See Painting/Insulation section.

4.2.5 Roof: See Painting/Insulation section.

4.2.6 Appurtenances: See Painting/Insulation section.

4.2.7 Painting/Insulation: Mechanically clean and recoat the areas of coating failure

on the shell, roof, stairway, handrails, piping, and appurtenances. All coating repairs

should be accomplished using an epoxy based coating system.

4.3 Compliance Requirements:

4.3.1 Foundation: None.

4.3.2 Containment: None.

4.3.3 Bottom: None.

4.3.4 Shell: None.

4.3.5 Roof: None.

4.3.6 Appurtenances: None.

4.3.7 Painting/Insulation: None.


4.4 Serviceability:

Tank # 1 is in compliance with the requirements of API Standard 653 for structural

integrity, and the following schedule may be implemented:

4.4.1 The next visual inspections should be accomplished by a Certified API-653

Inspector prior to April, 2012 in accordance with API Standard 653.

4.4.2 The next ultrasonic thickness measurement inspections should be accomplished

by a Certified API-653 Inspector prior to April, 2022 in accordance with API Standard

653.

4.4.3 The next internal inspection should be accomplished by a Certified API-653

Inspector prior to July, 2022 in accordance with API Standard 653.


Appendix A

Engineering Calculations

1. Shell Service Life


Shell Life Evaluation

To determine the remaining shell service life and maximum inspection intervals, calculate the corrosion

rate and remaining corrosion allowance for each shell course using the following:

SE

DGHt

)1(6.2min SE

DGHt

)(6.2min

API-653 4.3.3.1a API-653 4.3.3.1b

Y

ttC

actprev

r r

actut

C

ttI

2

min

r

actv

C

ttI

4

min

Where:

tmin = The minimum acceptable shell thickness for each course, in inches; however, tmin shall not be

less than 0.1 inch for any tank course.

tnorm = The nominal shell thickness, in inches.

tact = The current measured shell thickness, excluding pits and corrosion, in inches.

tprev = The previous measured shell thickness, excluding pits and corrosion or tnorm, in inches.

D = The nominal diameter of the tank, in feet.

H = The height from the bottom of each shell course to the maximum liquid level, in feet.

Hc = The calculated safe fill height, in feet, for the current product.

G = The highest specific gravity of the contents.

Y = Specified minimum yield strength of the plate; use 30,000 pounds per square inch if not

known (N/A for riveted tanks).

T = The smaller of the specified minimum tensile strength of the plate or 80,000 pounds per

square inch; use 55,000 psi if not known (N/A for riveted tanks).

S = The maximum allowable stress, in pounds per square inch. For welded tanks, use the smaller

of 0.80Y or 0.429T for the bottom and the second course or the smaller of 0.88Y or 0.472T for

all other courses. For riveted tanks, use S = 21,000 psi. For elevated temperatures above

200OF, the maximum allowable stress shall be the smaller of 2/3 the minimum yield strength

multiplied by the M-factor (M) of API-650 Appendix M or the product design stress value

listed in Table 3-2 of API-650.

E = The original joint efficiency for the tank. Use Table 2-1 from API Standard 653 if original E is

unknown; E = 1.0 when evaluating the retirement thickness in a corroded plate, when away

from welds or joints by at least the greater of one inch or twice the plate thickness. For riveted

tanks, use E = 1.0 for shell plates when greater than 6 inches from rivets; use the value of E

from API-653 Table 2-1 when within 6 inches of rivets.

Cr = The shell corrosion rate, in inches per year.

Iut = The inspection interval for the next ultrasonic inspection, in years (not to exceed 15 years).

Iv = The inspection interval for the next visual external inspection, in years (not to exceed 5 years).

ΔY = The years between the previous measured shell thickness (tprev) and the current measured shell

thickness (tact), in years.

InterSpec, LLCRev.21505-1

4/10/ 2007

Tank #: 1

Plate Specification: Unknown T 55,000

Material: Y 30,000

Manufactured Date: 1950 circa 23595

Tank Specification Unit 25960

D 45.000 feet 0.80Y 0.429T

HTank 35.920 feet Smaller of 24000 23595

HProduct 35.92 feet the two: 0.88Y 0.472T

G 0.90 N/A 26400 25960

E 1 N/A *Smaller of Two specified minimum or 80,000(lb/in²)

ΔY 57 years

Maximum Previous Current 2, 3 MinimumProduct Allowable Measured Measured Acceptable Corrosion 1 Remaining Next VT Next UT Max Fill

Course Height Stress Joint Thickness Thickness Thickness Rate Life Inspection Inspection Height

Course Height Ft (psi) Efficiency (inches) (inches) (inches) (in./yr) (ca .) (years) (years) (feet)

No. (feet) (feet) (S ) (E ) (t prev) (t act) (t min) (C r) (years) (I v) (I ut)

1 8.000 35.920 23,595 1.00 0.312 0.301 0.156 0.00019 >20 5 5 35.92

2 8.000 27.920 23,595 1.00 0.312 0.306 0.120 0.00010 >20 5 5 35.92

3 8.000 19.920 25,960 1.00 0.312 0.303 0.100 0.00016 >20 5 5 35.92

4 6.000 13.920 25,960 1.00 0.187 0.187 0.100 0.00001 >20 5 5 35.92

5 5.920 8.000 25,960 1.00 0.187 0.184 0.100 0.00005 >20 5 5 35.92

NOTE:

2 Acceptable roof thickness in any

100in.

2 shall not be less than 0.090 in

3 UL-142 Section 17.2.1 , 25.1, and 13.2.1 for Horz./Vertical and rectangular tanks <50,000 gal and

>50,000 gal. API 653 Section 4.3.2.1, 4.3.4.1 and 4.4.1

Current Maximum Safe Fill Height is not restricted.

Carbon Steel Specified minimum yield strength(lb/in ²)

Specified minimum tensile strength *(lb/in²)

Shell Life Evaluation : Data Result

Owner/Operator:

Inspection Date :

Peninsula Oil; Wilco Terminal - Seaford, DE

1The engineering data used to calculate in-service period of operation (Remaining Life) assumes the tank remains in the

same service and all corrosion rates remain constant.

All other course

SMaximum allowable stress, first and second (lb/in ²)

Maximum allowable stress, for all other (lb/in²)

Bottom and second course

0.000

0.050

0.100

0.150

0.200

0.250

0.300

0.350

1 2 3 4 5

inch

es

Course #

Shell Life Evaluation

tprev

tact

tmin


Appendix B

Engineering Data

1. Tank UT Readings

2. Nozzle UT Readings

InterSpec,LLCRev.21505-1

DATA Sheet : 1 Tank # 1

1 0.181 1 0.303 1 NA

2 0.186 2 0.301 Average

3 0.185 3 0.299 Std.Dev.

4 0.187 4 0.301

5 0.181 5 0.299

6 0.187 6 0.303

7 0.186 7 0.301

8 0.187 8 0.300

9 0.185 9 0.302

10 0.183 10 0.301

11 0.181 11 0.308

12 0.184 12 0.308

13 0.186 13 0.304

14 0.187 14 0.306

15 0.183 15 0.308

16 0.181 16 0.305

17 0.187 17 0.308

18 0.186 18 0.304

19 0.180 19 0.305

20 0.179 20 0.308

21 0.186 21 0.304

22 0.183 22 0.296

23 0.182 23 0.300

24 0.183 24 0.297

25 0.180 25 0.305

26 0.184 26 0.308

27 0.184 27 0.306

28 0.185 28 0.301

29 0.187 29 0.307

30 0.186 30 0.305

Average 0.184 31 0.185

Std.Dev. 0.002504249 32 0.183

33 0.185

34 0.187

35 0.187

36 0.189

37 0.190

38 0.189

39 0.188

40 0.184

41 0.181

42 0.185

43 0.187

44 0.181

45 0.182

46 0.186

47 0.181

48 0.185

49 0.184

50 0.187

Average 0.256

Std.Dev. 0.058547622

Owner/Operator:

Roof UT Readings Shell UT Readings Floor UT Readings



1 0.303 1 0.308 1 0.304

2 0.301 2 0.308 2 0.296

3 0.299 3 0.304 3 0.300

4 0.301 4 0.306 4 0.297

5 0.299 5 0.308 5 0.305

6 0.303 6 0.305 6 0.308

7 0.301 7 0.308 7 0.306

8 0.3 8 0.304 8 0.301

9 0.302 9 0.305 9 0.307

10 0.301 10 0.308 10 0.305

1 0.185 1 0.181 1 NA

2 0.183 2 0.185 2

3 0.185 3 0.187 3

4 0.187 4 0.181 4

5 0.187 5 0.182 5

6 0.189 6 0.186 6

7 0.190 7 0.181 7

8 0.189 8 0.185 8

9 0.188 9 0.184 9

10 0.184 10 0.187 10

1 NA 1 NA 1 NA

2 2 2

3 3 3

4 4 4

5 5 5

6 6 6

7 7 7

8 8 8

9 9 9

10 10 10

Shell 7

Shell 8

Shell 9

Shell Drop (UT Readings) All Course

DATA Sheet : 1 (Continued)

Shell 6

Shell 1

Shell 2

Shell 3

Shell 4

Shell 5


DATA Sheet: 2 Tank #:

1 NA 1 0.212 1 0.267 1 0.259

2 2 0.211 2 0.269 2 0.261

3 3 0.212 3 0.267 3 0.257

4 4 0.210 4 0.268 4 0.256

Average Average 0.211 Average 0.268 Average 0.258

1 0.268 1 NA 1 1

2 0.268 2 2 2

3 0.269 3 3 3

4 0.268 4 4 4

Average 0.268 Average Average Average

1

Owner/Operator:

Tank Nozzles UT Readings

Nozzle E Nozzle F

Nozzle A Nozzle B Nozzle C Nozzle D


0.100

0.110

0.120

0.130

0.140

0.150

0.160

0.170

0.180

0.190

0.200

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29

inch

es

Data Points

Roof UT Readings

0.000

0.050

0.100

0.150

0.200

0.250

0.300

0.350

1 6 11 16 21 26 31 36 41 46

inch

es

Data Points

Shell UT Reading

0.200

0.220

0.240

0.260

0.280

0.300

0.320

0.340

0.360

0.380

0.400

1 6 11 16 21 26 31 36 41 46 51 56

inch

es

Data Points

Floor UT Reading


Appendix C

Engineering Drawings

1. Shell Layout

2. Roof Layout

Remarks/Legend:

Drawing Title: Tank Description:

Date: Rev. No.: Scale:

Drawn By:

Company:

4/10/2007 N/AInterSpec, LLC

N/A

Peninsula Oil Co., Inc.; Wilco, DEA - 2" PlugB - 3" Water DrawC - 6" ProductD - 20" Manhole

A BC

1-1

36'

CA B

D E

DE

1-2 1-3 1-4 1-5

2-1 2-2 2-3 2-4 2-5

3-1 3-2 3-3 3-4 3-53-9

2-9

4-1 4-2 4-3 4-54-4

5-9 5-1 5-2 5-3 5-4 5-5

ATG

ATG

F

61

E - 6" ProductF - 4" Foam Line

ATG

F

Remarks/Legend:



Drawn By:

Company:


N/A

Peninsula Oil Co., Inc.; Wilco, DE

36'

1-6 1-7 1-8 1-9

2-6 2-7 2-82-5

3-6 3-7 3-83-5

2-9

4-6 4-7 4-94-8

5-6 5-7 5-8 5-9

16

3-9

5-9

Remarks/Legend:



Drawn By:

Company:


N/A

Peninsula Oil Co., Inc.; Wilco, DEA - 6" Gauge HatchB - 6" Vent

AB

1

2

3

4

5

6

7

8

9

10

1112

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

C - 20" Light AccessD - 1-1/4" Roof Support Rod

E - 2" ATGF - 20" Light Hatch Access

D

E

F

C

Patches

Patch

A

B

C

D

EF


Appendix D

API Checklists

1. In-Service Checklist

InterSpec, LLCREV.112104-1

a. NA

a. X

b. X

c. X

d. X

e. X

a. NA

b. NA

a. NA

a. NA

a. X

b. X

a. X

a. X

b. X

c. X

a. NA

a. NA

b. NA

c. NA

d. NA

e. NA

a.NA

b. NA

c. NA

a. X

b. X

c. X

d. NA

e. NA

Inspect the bottom-to-foundation seal.

Inspect vertical seams to see if they have been full fillet lap welded to increase joint efficiency.

If no record exists of vertical riveted seams, dimension and sketch (or photograph) the rivet pattern: number of rows, rivet size, pitch

length, and note whether the joint is butt riveted or lap riveted.

Inspect wind girder and handrail for corrosion damage (paint failure, pitting, corrosion product buildup), especially where it occurs at tack

welded junctions, and for broken welds.

C.1.3 SHELL APPURTENANCES

C.1.3.1 Manways and Nozzles

Inspect for cracks or signs of leakage on weld joints at nozzles, manways, and reinforcing plates.

Inspect for shell plate dimpling around nozzles, caused by excessive pipe deflection.

Inspect for flange leaks and leaks around bolting.

Check operating condition of dike drains.

Inspect the area for buildup of trash, vegetation, and other inflammables buildup.

Visually inspect for paint failures, pitting, and corrosion.

Clean off the bottom angle area and inspect for corrosion and thinning on plate and weld.

C.1.1.6 Housekeeping

C.1.2 SHELLS

C.1.2.1 External Visual Inspection

Look for areas where leaching of oil has left rock filler exposed, which indicates hydrocarbon leakage.

Check for settlement into the base which would direct runoff rain water under the tank rather than away from it.

Check site for drainage away from the tank and associated piping and manifolds.

C.1.1.4 Rock

C.1.1.5 Site Drainage

C.1.1.3 Oiled Dirt or Sand

Presence of crushed rock under the steel bottom usually results in severe underside corrosion. Make a note to do additional bottom plate

examination (ultrasonic, hammer testing or turning of coupons) when the tank is out of service.

Inspect for cavities under foundation and vegetation against bottom of tank.

Check that runoff rainwater from the shell drains away from the tank.

Check for settlement around perimeter of tank.

Check for settling of tank into asphalt base which would direct runoff rain water under the tank instead of away from it.

C.1.1.2 Asphalt

Inspect drain openings in ring, back of waterdraw basins and top surface of ring for indications of bottom leakage.

C.1.1 FOUNDATION

C.1.1.1 Concrete Ring

Inspect for broken concrete, spalling and cracks, particularly under backup bars used in butt welded annular rings under the shell.

Table C-1: Tank In-Service Inspection Checklist

Measure foundation levelness and bottom elevations (see Appendix B for extent of measurements).

C.1.2.4 Wind Girder (Floating Roof Tanks)

C.1.2.2 Internal (Floating Roof Tank)

C.1.2.3 Riveted Shell Inspection

Visually inspect for grooving, corrosion, pitting, and coating failures.

Inspect external surface for rivet and seam leaks.

Locate leaks by sketch or photo (location will be lost when shell is abrasively cleaned for painting).

Inspect rivets for corrosion loss and wear.

Inspect sealing of insulation around manways and nozzles.

Check for inadequate manway flange and cover thickness on mixer manways.

Check support welds to shell for pitting, especially on shell plates.

Note whether supports have reinforcing pads welded to shell.


a. X

b. NA

c. X

d. X

e. NA

f. X

g. NA

h. NA

a. X

b. X

c. NA

d. NA

e. NA

f. NA

g. NA

h. NA

i. NA

a. NA

b. NA

c. NA

a. NA

a. NA

b. NA

c. NA

a. NA

b. NA

c. NA

a. NA

a. NA

a. NA

b. NA

a. NA

On floating roof tanks, when the roof is in the lowest position, check that no more than two feet of tape are exposed at the end of the tape

guide.

Check for anchored piping which would be hazardous to the tank shell or bottom connections during earth movement.

C.1.3.3 Autogauge System

Identify size and construction material of autogauge tape guide (floating roof tanks).

Inspect for proper mounting flange and support.

Check for leaks at threaded and flanged joints.

C.1.3.8 Swing Lines: External Guide System

Check for water or gravity differences that would indicate a leaking swing joint.

C.1.3.11 Swing Lines: Product Sample Comparison

For non-stainless steel cable, check for corrosion over entire length.

All cable: check for wear or fraying.

Inspect for leakage.

Inspect condition of power lines and connections to mixer.

C.1.3.9 Swing Lines: Identify Ballast Varying Need

Test bracing and supports of sample system lines and equipment.

Inspect condensate drain for presence of oil indicating leakage.

C.1.3.5 Heater (Shell Manway Mounted)

C.1.3.6 Mixer

Nonfloating. Raise, then lower the swing line with the winch, and check for cable tightness to confirm that swing line lowered properly.

Floating. With tank half full or more, lower the swing line, then let out cable and check if swing has pulled cable tight, indicating that the

winch is operating properly.

Check circulation pump for leaks and operating problems.

C.1.3.4 Shell-Mounted Sample Station

Inspect sample lines for function of valves and plugging of lines, including drain or return-to-tank line.

Target should indicate direction of swing opening (up or down) and height above bottom where suction will be lost with swing on bottom

support.NAa.

Indicator. Check that the indicator moves in the proper direction: Floating swing line indicators show a lower level as cable is wound up

on the winch. Non-floating swing line indicators show the opposite.

C.1.3.10 Swing Lines: Cable Material and Condition

Check for significant difference in stock specific gravity.

C.1.3.12 Swing Lines: Target

Inspect condition of board and legibility of board-type autogauges.

Test freedom of movement of marker and float.


Inspect manifold piping, flanges, and valves for leaks.

Inspect fire fighting system components.

C.1.3.2 Tank Piping Manifolds

C.1.3.7 Swing Lines: Winch Operation

Check for adequate thermal pressure relief of piping to the tank.

Compare actual product level to the reading on the autogauge (maximum variation is 2 inches).

Ask operator if tape tends to hang up during tank roof movement (floating roof tanks).

Check operation of regulators for tanks with purge gas systems.

Check sample connections for leaks and for proper valve operation.

Check for damage and test the accuracy of temperature indicators.

Check welds on shell-mounted davit clips above valves 6 inches and larger.

Inspect autogauge tape guide and lower sheave housing (floating swings) for leaks.

Inspect autogauge head for damage.

Bump the checker on autogauge head for proper movement of tape.


a. NA

a. NA

a. NA

a. NA

a. NA

a. NA

b. NA

c. NA

a. NA

b. NA

c. NA

d. NA

e. NA

f. NA

g. NA

h. NA

i. NA

j. NA

a. NA

b. NA

c. NA

d. NA

e. NA

f. NA

g. NA

h. NA

a. NA

b. NA

c. NA

d. NA

e. NA

On ultra clean stocks such as JP4, check for presence and condition of protective coating or liner inside sample hatch (preventing rust

from pipe getting into sample).

C.1.4.2 Deck Plate External Corrosion

Visually inspect for paint failure, holes, pitting, and corrosion product on the roof deck.

C.1.4.3 Roof Deck Drainage

Remove small test sections of insulation and check roof deck for corrosion and holes near the edge of the insulated area.

C.1.4.7 Floating Roof Seal Systems


Inspect for wet insulation under the weather coat.

At several locations, measure distance from roof rim to a horizontal weld seam above the roof. A variance in the readings

indicates a nonlevel roof with possible shell out-of-round, out-of-plumb, leaking pontoons or hangup. On small diameter tanks,

an unlevel condition can indicate unequal loading at that level.

Test for explosive gas on top of the internal floating roof. Readings could indicate a leaking roof, leaking seal system or

inadequate ventilation of the area above the internal floating roof.

Visually inspect for cracks or leaks in the insulation weather coat where runoff rain water could penetrate the insulation.

Look for indication of standing water. (Significant sagging of fixed roof deck indicates potential rafter failure. Large standing

water areas on a floating roof indicate inadequate drainage design or, if to one side, an unlevel roof with possible leaking

pontoons).

C.1.4 ROOFS

C.1.4.1 Deck Plate Internal Corrosion

For safety, before accessing the roof, check with ultrasonic instrument or lightly use a ball peen hammer to test the deck plate near the

edge of the roof for thinning. (Corrosion normally attacks the deck plate at the edge of a fixed roof and at the rafters in the center of the

roof first.)

C.1.4.6 Roof Insulation

at low pump out

at midshell

at high liquid level

Measure and record maximum seal-to-shell gaps:

C.1.4.4 Level of Floating Roof

C.1.4.5 Gas Test Internal Floating Roof

Check if seal fabric on primary shoe seals is pulling shoes away from shell (fabric not wide enough).

Inspect fabric for deterioration, holes, tears, and cracks.

Inspect visible metallic parts for corrosion and wear.

Measure and record annular space at 30 foot spacing (minimum of 4 quadrants) around roof and record. Measurements should be taken in

directly opposite pairs. (a.) ,Opposite pair 1; (b) ,Opposite pair 2

Inspect for openings in seals that would permit vapor emissions.

Inspect for protruding bolt or rivet heads against the shell.

Pull both primary and secondary seal systems back all around the shell to check their operation.

Inspect secondary seals for signs of buckling or indications that their angle with the shell is too shallow.

C.1.5 ROOF APPURTENANCES

Inspect wedge-type wiper seals for flexibility, resilience, cracks and tears.

Inspect visible portion of the gauge well for thinning, size of slots, and cover condition.

C.1.5.1 Sample Hatch

Inspect condition and functioning of sample hatch cover.

Test operation of system.

Check for corrosion and plugging on thief and gauge hatch cover.

Check for reinforcing pad where sample hatch pipe penetrates the roof deck.

On tanks governed by Air Quality Monitoring District rules, check for the condition of seal inside hatch cover.

Where sample hatch is used to reel gauge stock level, check for marker and tab stating hold off distance.

On floating roof sample hatch and recoil systems, inspect operation of recoil reel and condition of rope.

C.1.5.2 Gauge Well

Check for a hold off distance marker and tab with hold off distance (legible).

If tank has a gauge well washer, check valve for leakage and for presence of a bull plug or blind flange.

On floating roofs, inspect condition of roof guide for gauge well, particularly the condition of the rollers for grooving.

If accessible, check the distance from the gauge well pipe to the tank shell at different levels.


a. NA

a. NA

b. NA

a. NA

b. NA

a. NA

b. NA

c. NA

a. NA

a. NA

a. NA

a. NA

a. NA

a. NA

b. NA

a. NA

b. NA

c. NA

a. X

b. X

c. X

d. X

e. NA

f. NA

a. X

b. X

c. NA

d. NA

e. X

a. X

b. NA

c. NA

d.NA

Identify and report type (steel pipe, galvanized pipe, square tube, angle) and size of handrails.

Inspect for pitting and holes, paint failure.

Check reinforcing pads where supports are attached to shell or roof.

Inspect the surface that deck plate or grating rests on for thinning and holes.

Inspect the attachment of frame to supports and supports to tank for corrosion and weld failure.

C.1.6.2 Platform Frame

Inspect attachment welds.

Identify cold joints and sharp edges. Inspect the handrails and midrails.

Inspect safety drop bar (or safety chain) for corrosion, functioning and length.

Inspect frame for corrosion and paint failure.

When equipped with a recoil reel opening device, check for proper operation.

Check condition of screens, locking and pivot pins.

Check for leg racks on roof.

C.1.5.8 Gauging Platform Drip Ring

C.1.5.9 Emergency Roof Drains

C.1.5.7 Roof-Mounted Vents (Internal Floating Roof)

Check grating tie down clips. Where grating has been retrofitted to replace plate, measure the rise of the step below and above the grating

surface and compare with other risers on the stairway.

Check the hatch for corrosion and missing bolts.

Look for corrosion on the tape guide's and float guide's wire anchors.

Check overall conditions.

C.1.5.3 Fixed Roof Scaffold Support

Inspect for corrosion.

Check tape cable for wear or fraying caused by rubbing on the cover.

C.1.5.10 Removable Roof Leg Racks

C.1.5.4 Autogauge: Inspection Hatch and Guides (Fixed Roof)

Inspect scaffold support for corrosion, wear, and structural soundness.


C.1.5.6 Sample Hatch (Internal Floating Roof)

C.1.5.12 Rim Vents

C.1.5.13 Pontoon Inspection Hatches

Check condition of the screen on the rim vent cover.

Check for plating off or removal of rim vents where jurisdictional rules do not permit removal.

C.1.5.11 Vacuum Breakers

On fixed roof tanks with drip rings under the gauging platform or sampling area, inspect for plugged drain return to the tank.

Inspect vapor plugs for emergency drain: that seal fabric discs are slightly smaller than the pipe ID and that fabric seal is above the liquid

level.

Report size, number and type of vacuum breakers. Inspect vacuum breakers. If high legs are set, check for setting of mechanical vacuum

breaker in high leg position

When equipped with a fabric seal, check for automatic sealing after sampling.

Inspect the handrail between the rolling ladder and the gauging platform for a hazardous opening when the floating roof is at its lowest

level.

Check that flat-surface to flat-surface junctures are seal welded.

Inspect plate-to-frame weld for rust scale buildup.

Inspect grating for corrosion-caused thinning of bars and failure of welds.

Inspect deck plate for corrosion-caused thinning or holes (not drain holes) and paint failure.

C.1.6.3 Deck Plate and Grating

C.1.6.1 Handrails

C.1.6 ACCESSWAYS

Open pontoon inspection hatch covers and visually check inside for pontoon leakage.

Test for explosive gas (an indicator of vapor space leaks).

If pontoon hatches are equipped with locked down covers, check for vent tubes. Check that vent tubes are not plugged up. Inspect lock

down devices for condition and operation.

C.1.5.5 Autogage: Float Well Cover


a. NA

b. NA

c. NA

a. NA

b. NA

c. NA

d. NA

e. NA

f. NA

g. NA

h. NA

i. NA

j. NA

k. NA

l. NA

m. NA

C.1.6.4 Stairway Stringers


Inspect spiral stairway stringers for corrosion, paint failure and weld failure. Inspect attachment of stairway treads to stringer.

Inspect steel support attachment to concrete base for corrosion.

C.1.6.5 Rolling Ladder

Inspect stairway supports to shell welds and reinforcing pads.

Inspect rolling ladder stringers for corrosion.

Identify and inspect ladder fixed rungs (square bar, round bar, angles) for weld attachment to stringers and corrosion, particularly where

angle rungs are welded to stringers.

Inspect top surface of rolling ladder track for wear by wheels to assure at least 18 inches of unworn track (track long enough).

Inspect rolling ladder wheels for freedom of movement, flat spots and wear on axle.

Inspect alignment of rolling ladder with roof rack.

Check for wear and corrosion where rolling ladder attaches to gauging platform.

Inspect pivot bar for wear and secureness.

Inspect operation of self-leveling stairway treads.

Inspect for corrosion and wear on moving parts.

Inspect rolling ladder track welds for corrosion.

Inspect track supports on roof for reinforcing pads seal welded to deck plate.

If rolling ladder track extends to within five feet of the edge of the roof on the far side, check for a handrail on the top of the shell on that

side.

Check by dimensioning, the maximum angle of the rolling ladder when the roof is on low legs. Maximum angle. __________


Appendix E

Photographs


2" plug, 3" drain and 6" product line

6" product and ground strap

20" manway


6" product

ATGs

Spiral stairway


Dirt covering chime

Ground strap

4" foam line


4" foam line

Shell plate welded externally to the shell

Shell horizontal and vertical welds


Rusted and expanding stairway connector

Roof plates

Roof plates


6" gauge hatch

6" breather

20" light access

INTER SPEC, LLC - LoopNet...Gary G. Boley, Senior Inspector, API-653 # 020, API-570 # 267, API-510 #...

Documents

Transcript of INTER SPEC, LLC - LoopNet...Gary G. Boley, Senior Inspector, API-653 # 020, API-570 # 267, API-510 #...