Tank Standards and Part 4 SP001 Inspections [PDF]

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Aboveground Storage Tank Types Flammable Liquid Aboveground Storage Tank Workshop February 2, 2011

y

Portable containers

y

Shop-fabricated

y

Field-erected

Ab Aboveground d Tank T k Fabrication F b i ti Standards St d d Dana Schmidt, PE Project Engineer Steel Tank Institute, div. of STI/SPFA

Portable containers

Portable containers

3 types of Portable Containers 1. 2. 3.

Metal and plastic drums IBC (Intermediate Bulk Container) IM (Intermodal) or UN (United Nations) portable tank

1

Metal and plastic drums

NFPA 30 Portable Container Requirements y

Metal containers ◦ Metal IBC, Metal portable tanks ◦ Conform to USDOT Hazardous Materials Regulation 49 CFR*, OR ◦ Part P t 6 off UN Recommendations R d ti on the th Transport of Dangerous Goods

y

IBC (Intermediate Bulk Container)

*see http://www.access.gpo.gov/nara/cfr/waisid x_04/49cfr178_04.html

NFPA 30 Portable Container Requirements y

Rigid nonmetallic IBC ◦ USDOT Hazardous Materials Regulations, 49 CFR ◦ Part 6 of UN Recommendations on the Transport of Dangerous Goods for Classes 31H1, 31H2, 31HZ1

IM or UN portable tank

Shop Fabricated Aboveground Storage Tanks Standards

2

50,000 Gallons

V ertical Indoo r

F ire R ated G enerator

O u tdo or

D ik ed

AST Standards for Shop Fabricated Tanks y

API - American Petroleum Institute ◦ API 12F ◦ API 650, 650 Appendix J

y

UL - Underwriters Laboratories

API Specifications y

◦ “Specification for Shop Welded Tanks for Storage of Production Liquids” ◦ Vertical, cylindrical only y

y

Table 1 “Tank Dimensions” includes: ◦ ◦ ◦ ◦

Capacity Outside diameter g Height Connection details

API 650, Appendix J ◦ “Shop Assembled Welded Steel Tanks for Oil Storage” ◦ Vertical, cylindrical only

◦ UL 142 ◦ UL 2085

API 12F

API 12F

API 12F y

Specifies steel thickness ◦ ◦ ◦ ◦ ◦ ◦ ◦

BOTTOM: 1/4 in. (except sump to be 3/8 in.) SHELL: 3/16 in. or 1/4 in. as requested by purchaser DECK (TOP): same as shell except 15 ft.-6 in. diameter tanks to be 1/4 in.

3

API 12 F Tank Layout

Aux Line Connection Vent Line Connection

Fill Line Connection Overflow Line Connections

A, B & C Dimensions are all provided in copy of API 12 F Table 1 at back of binder.

A B

Note: All capacities are in barrels not gallons.

C D

(1 barrel = 42 gals.) Drain Line Connection

24" x 36" Clean Out Pipeline Connection

API 12F continued y

API 12F Painting

Emergency venting per Table C-1

y

◦ based on tank dimensions given in Table 1

y

Pressure testing with air at 1 1/2 times design pressure and apply soap solution y Nameplate y

◦ ◦ ◦ ◦

Manufacturer, serial number, year built Nominal diameter, height, capacity Thickness of bottom, shell, deck Design pressure

API 650, Appendix J Shell thickness

API 650, Appendix J y y

Metal primer required Finish coating optional

Limited to 20 ft. diameter Steel thickness: ◦ BOTTOM: ◦ SHELLS:

1/4 in. calculations required and Diameter

◦ ROOFS:

Minimum

to 10.5 ft.

3/16 in.

over 10.5 ft.

1/4 in.

calculations required cone, dome and umbrella

t=

2.6 D( H − 1)G + CA ( E )(21,000)

t = minimum thickness D = nominal diameter H = liquid level Diameter to 10.5 ft. over 10.5 ft.

G = liquid specific gravity E = joint efficiency CA = corrosion allowance Minimum 3/16 in. 1/4 in.

4

API 650, App. J (continued)

API 650, App. J (continued)

Relies on Fire Codes for emergency venting requirements y Pressure testing

y

y

◦ diameters to 12 ft.=5 ft. 5 psig ◦ diameters over 12 ft.=2 to 3 psig y

Nameplate ◦ API 650, App. J, serial number, year built ◦ Nominal diameter, height, maximum capacity ◦ Design pressure, temperature, liquid level

Underwriters Laboratories

Does include: ◦ Qualified welders requirement ◦ X-ray of some welds and magnetic particle testing of nozzles

y

Does not include: ◦ requirements for secondary containment ◦ requirements for painting

UL 142

ISBN 1-55989-385-0

Steel Aboveground Tanks for Flammable and Combustible Liquids

UL 142 “Steel Aboveground Tanks for Flammable and Combustible Liquids” y UL 2085 “Protected Protected Aboveground Tanks for Flammable and Combustible Liquids” y UL 2244 “Aboveground Flammable Liquid Tank Systems” y

Underwriters Laboratories UL 142

y

Atmospheric Tank ◦ -0.5 to 1 psig

Single wall y Double wall y Steel Diked Tanks y

◦ Open or Closed Top

Carbon or stainless steel y Stationary use only y

UL 142 Steel thickness

Capacities up to 50,000 gallons y Specifies steel thicknesses y

◦ Primary tank ◦ Secondary tank ◦ Shells and heads

5

Underwriters Laboratories UL 142 y

STI AST Technologies (UL 142)

Performance testing required for: ◦ Rectangular tanks ◦ Optional support designs p tank accessories ◦ Ladders and other optional

y

Manufacturing tests required: ◦ Air test at 1-1/2 to 5 psig with soap suds (based on tank type) ◦ Hydrostatic pressure (with water)

Underwriters Laboratories UL 142 y

Horizontal Cylindrical ◦ ◦ ◦ ◦

Steel thickness specified, including shell and heads Optional support design requires testing or calculations Diameters to 12 feet Air test at 5 psi

Underwriters Laboratories UL 142 y

Underwriters Laboratories UL 142

Rectangular ◦ Requires performance testing to prove design ◦ Manufacturing air test at 3 psi

y

Vertical cylindrical ◦ Steel thickness specified ◦ Manufacturing air test at 1 1/2 to 2 1/2 psi ◦ Dished or conical roof required

Open Diked Tanks (F911)

18 Performance 18.1 Hydrostatic strength test 18.1.1 The tank shall be tested to demonstrate that the strength of the assembly and the welded joints are in accordance with these requirements. 18.1.2 The tank shall not rupture or leak when subjected to the Hydrostatic Strength Test, Section 40. 18.2 Top load test 18.2.1 After being subjected to the Top Load Test, Section 41, the tank shall then be subjected to the Leakage Test, Section 39, and shall not leak.

6

Diked Tanks with Rainshields

UL 142 Supports y y

y

y

Maximum height of 12 inches Must withstand 2 times the weight of a full tank Design using calculations approved by UL Design using Performance Test

UL 142 Venting Requirements y

Normal vents ◦ Allow air to enter the tank when fluid is being withdrawn and also exhausts air when the tank is being filled ◦ Required on Primary tank (each compartment) ◦ Size per Table 8.2 in UL 142

Closed Diked Tanks

UL 142 Welding y y

Specifies weld joint designs Does not require “qualified” welders

UL 142 Emergency Venting y

Emergency vents ◦ Prevent damage to the tank by allowing excess pressure to be vented. They are designed to relieve excess pressure in the event of an emergency, such as a fire. ◦ Required on x Primary tank and x Secondary tank

7

UL 142 Emergency Venting y

UL 142 Painting

Emergency vent device size

No paint required on Stainless steel tanks y One coat of paint required q on Carbon steel tanks

◦ “Wetted surface area”

y

x Horizontal cylindrical tanks = 75% of total surface area x Vertical tanks = shell surface area (and bottom if elevated) x Rectangular tanks = surface area of sides and bottom

◦ Table 8.1 in UL 142 gives x Emergency vent capacity x Size

UL 142 Label

UL 2085

“Protected Tank”

ISBN 0-7629-0238-8

Protected Aboveground Tanks for Flammable and Combustible Liquids

y

◦ Part of the construction of the tank, monitorable

UL Serial No._________

y

Will have one of these statements: ◦ Aboveground Tank for Flammable Liquids ◦ Aboveground Ab dT Tankk ffor Fl Flammable bl Liquids L d on Supports S ◦ Secondary Containment Aboveground Tank for Flammable Liquids

“Integral” Secondary containment

Insulation Reduce heat in a fire y Protection from physical damage y y

◦ Open Top Diked Aboveground Tank for Flammable Liquids ◦ Open Top Diked Secondary Containment Aboveground Tank for Flammable Liquids ◦ Closed Top Diked Aboveground Tank for Flammable Liquids ◦ Closed Top Diked Secondary Containment Aboveground Tank for Flammable Liquids

Vehicle Impact Resistance Option

2 Hour 2000 Degree Exposure

8

Ballistics Resistance Option

UL 2085 Tank Construction y

Refer to UL 142 ◦ ◦ ◦ ◦ ◦

y

Steel thickness Welding pp design g Support Vents Emergency vents

Must have provisions for monitoring interstitial space

Cutaway of Insulated Tank Technology

Concrete Encased

Cylindrical Tanks

Rectangular Tanks

9

Vertical Cylindrical

CARB Enhanced Vapor Recovery Fireguard® passed the Standing Loss Control portion of CARB EVR certification requirement in 2008 yC CARB requirement equ e e t of o Emission Factor < 0.57/1000 gallons corresponds to a 90% reduction in emissions y

◦ As compared to a single-wall tank without a P/V vent.

UL 2085 Label

Vaulted Tanks - UL 2245

10

Generator Base Tanks y

UL 142 Special Purpose Tank

y

Provides sturdy support for emergency power generator

y

Stores fuel supply

Small Field Field--erected tanks

API 650 Welded Steel Tanks for Oil Storage y

Shell courses

◦ ◦ ◦ ◦ ◦ ◦

2.6 D ( H − 1)G td = + CA Sd

API 650 Welded Steel Tanks for Oil Storage y

Bottom plates ◦ Minimum ¼” ◦ 1” projection beyond shell

td = design thickness (in.) D = nominal tank diameter (ft.) H = height of liquid (ft.) G = specific gravity CA = corrosion allowance (ft.) Sd = allowable stress (psi)

11

API 650 Shell openings

API 650 tanks

Reinforcement usually required y Spacing specified

y

y

Nameplate ◦ ◦ ◦ ◦

Manufacturer, serial number, year built Nominal diameter, height, capacity Thickness of bottom,, shell,, deck Design pressure

12

Did you know? There may be more “regulated” AST’s than UST’s in the U.S. y Tanks under 300,000 gallons likely represent ep ese t 90% o of the t e actual actua tank ta units u ts in operation y STI estimates that there are over 4 million such tanks in existence today y

Flammable Liquid Aboveground Storage Tank Workshop February 2, 2011

T k IInspections Tank ti per STI SP001 Dana Schmidt, PE Project Engineer Steel Tank Institute, div. of STI/SPFA

Risk based inspections Tank owner’s view - addition of safeguards to reduce or simplify expensive tank inspections makes good business sense. y Regulator’s egu ato s view v ew – aaddition t o of o safeguards sa egua s minimize and eliminate releases. y

SP001 Scope y

Inspection of aboveground storage tanks ◦ Shop-fabricated ◦ Field-erected ◦ Portable containers

Inspection based on installation type and its risk to environment Tanks offering greatest risk have significantly g y more inspections y Tanks with less risk have less inspections y

AST Types in STI SP001 y

Storing liquids

y

Portable containers

◦ Flammable or Combustible ◦ Specific gravity 1.0 A bi to 200F ◦ Ambient

y

Shop-fabricated

◦ Atmospheric pressure

y

Field-erected

1

Facilities with a mix of tanks

Portable container y

3 types of Portable Containers 1. 2. 3.

Metal and plastic drums IBC (Intermediate Bulk Container) IM (Intermodal) or UN (United Nations) portable tank

Greater than 55 gallons and not intended for fixed installation

Shop-Fabricated AST Shop(per SP001) Welded metal AST fabricated in a manufacturing facility OR y An AST without a nameplate with a volume vo u e less ess tthan a o or equa equal to 50,000 U.S. gallons y

50,000 Gallons

V ertical Indoo r

F ire R ated G enerator

O u tdo or

D ik ed

2

AST Standards for Shop Fabricated Tanks y

API - American Petroleum Institute ◦ API 12F ◦ API 650, Appendix J

y

UL - Underwriters Laboratories ◦ UL 142 ◦ UL 2085

SP001 Key terms Release Prevention Barrier (RPB) y Continuous Release Detection Method (CRDM) y

Field-erected AST Field(per SP001) y y

y

Welded metal AST erected on-site where it will be used. Limited to a maximum shell height g of 50 feet and a maximum diameter of 30 feet An AST without a nameplate that is more than 50,000 U.S. gallons and a maximum shell height of 50 feet and a maximum diameter of 30 feet

Release Prevention Barrier (RPB) y

◦ “Sufficiently impervious” ◦ Under the AST

y

Release prevention barrier ???

Liquid containment barrier

Diverts leaks toward the perimeter of the AST where they can be easily detected

Continuous Release Detection Method (CRDM) A means of detecting a release of liquid through inherent design. It is passive because it does not require sensors or power to operate. Liquid releases are visually detected by facility operators. ◦ Tank with Release Prevention Barrier ◦ Secondary containment AST including doublewall ASTs ◦ Elevated AST with release prevention barrier

3

Spill Control

Tanks with CRDM

Prevent release of liquid to environment y Includes: y

◦ ◦ ◦ ◦

Remote impounding Secondary containment dike/berm Secondary containment AST Secondary containment system

Owner’s checklists

Inspection types y

Owner monthly inspections

y

Formal External inspections

y

Leak test

y

Formal Internal inspections

◦ Check operation of vents, coating, foundation ◦ Certified inspector, but no entry ◦ one time test to determine if container leaking. ◦ Entry into tank is necessary for full assessment

Table of Inspection Schedules y

Category 1

y

◦ Spill control ◦ CRDM

y

y

Category 2

y

Category 3

◦ Spill control ◦ No safeguards

y y

Category 1

P – Owner inspection E – External by inspector I – Internal by inspector L – Leak testing Double-wall Tank

Double-bottom Tank in Concrete Dike

4

Category 2

Category 3

Formal External and Formal Internal Inspections

Risk Matrix concept More Risk Tank Size

More e Risk

Shop built tanks

Category 1

Category 2

Category 3

0 - 1100

P

P

P, E&L(10)

1101 5,000

P

P, E&L(10)

[P, E&L(5), I(10)] or [P, E(5) & L(2)]

5,001 30,000

P, E(20)

[P, E(10)& I(20)] or [P, E(5) & L(10)]

[P, E&L(5), I(10)] or [P, E(5) & L(1)]

30,001 50,000

P, E(20)

P, E&L(5), I(15)

P, E&L(5), I(10)

P, E(5), I(10)

P, E(5), I(10)

P, E(5), I(10)

P

P

P **

Field erected Portable containers

y

Performed by Qualified Tank Inspector ◦ STI Trained and Certified ◦ API Certified (with additional SP001 certification)

External inspections

Internal inspections

Containment area y Stairways, ladders y Normal vents y Emergency E vents y Overfill alarms y Fire valves

y

y

y

UT of accessible areas, near base of tank (internal inspection spect o if problems found)

y

Check all external inspection items UT of entire tank bottom ◦ elevated tanks do not require entry

y

UT methods ◦ UTT – point measurements (15 points per sq. ft.) ◦ UTS – full scan if problems found in UTT

5

UT qualifications y

UTT (15 points per sq. ft.) ◦ Digital thickness meter ◦ Training of minimum one hour (thickness ranges, couplants, transducer types)

y

UTS (full (f ll scan)) ◦ Flaw detector ◦ Certified per ASNT TC-1A “Personnel Qualification and Certification in Non­destructive Testing”

Suitability for continued service y y y

y

Leak tests by qualified personnel Gas pressure decay y Gas pressure with soap bubbles y Gas and soil tracers y Mass measurement y Level measurement y Hydrostatic test y

MIC corrosion

MIC corrosion – Repair immediately. Next inspection 2 years Category 3 – less than 75%, then repair. Next inspection 5 years Category 2 – 3” in a sq. ft. is less than 75%, or l less th than 50% 50%, then th repair. i Next N t inspection i ti 5 years Category 1 - 3” in a sq. ft. is less than 50%, or less than 25%, then repair. Next inspection 5 years

Other tank damage

AST Inspector Certification

Fire Natural disaster – flooding, winds y Excessive settlement y Overpressure y Cracking of welds y Leak

y

y y

Meet experience and education requirements y Attend seminar y Pass exam y Visual acuity exam

6

Seminar topics

Experience and education Bachelor of Science degree and at least one year of experience, OR y 2 year certificate in engineering or technology and at least two years of experience, OR y High School diploma or equivalent and at least three years of experience. y

y

Related experience ◦ Construction of, operation of, or inspection and maintenance of steel storage tanks, pressure vessels, or steel piping systems. ◦ Also acceptable is engineers developing SPCC plans

y y y y

Tank Fabrication Standards Corrosion Basics Inspection Techniques Regulatory Requirements

y y y y y

Fire codes Valves and Piping Level Monitoring g Electrical Issues Hands on Demonstrations

Exam ◦ 2 sections: x Open book x AST Standards x Corrosion

x Closed book x Inspection, safety

◦ 80% total with no section under 70%

Inspection Schedule/Table P–Periodic Inspection by Owner E-External Inspection by Certified Inspector IInternal Inspection L-Leak Test Category 1

Category 2

0 - 1100

P

P

P, E&L(10)

1101 5,000

P

P, E&L(10)

[P, E&L(5), I(10)] or [P E(5) & L(2)] [P,

P, E(20)

[P, E(10)& I(20)] or [P, E(5) & L(10)]

[P, E&L(5), I(10)] or [P, E(5) & L(1)]

P, E(20)

P, E&L(5), I(15)

P, E&L(5), I(10)

P, E(5), I(20)

P, E(5), I(20)

P, E(5), I(20)

P

P

P **

Size, Gallons

Shop built tank

5,001 30,000 30,001 50,000 Field Erect Tank Portable Containers

Category 3

7

Inspection Schedule/Table P–Periodic Inspection by Owner E-External Inspection by Certified Inspector IInternal Inspection L-Leak Test Category 1

Category 2

0 - 1100

P

P

P, E&L(10)

1101 5,000

P

P, E&L(10)

[P, E&L(5), I(10)] or [P E(5) & L(2)] [P,

5,001 30,000

P, E(20)

[P, E(10)& I(20)] or [P, E(5) & L(10)]

[P, E&L(5), I(10)] or [P, E(5) & L(1)]

30,001 50,000

P, E(20)

P, E&L(5), I(15)

P, E&L(5), I(10)

P, E(5), I(20)

P, E(5), I(20)

P, E(5), I(20)

P

P

P **

Size, Gallons

Shop built tank

Field Erect Tank Portable Containers

Category 3

Inspection Schedule/Table P–Periodic Inspection by Owner E-External Inspection by Certified Inspector IInternal Inspection L-Leak Test Size, Gallons

Shop built tank

Category 1

Category 2

Category 3

0 - 1100

P

P

P, E&L(10)

1101 5,000

P

P, E&L(10)

[P, E&L(5), I(10)] or [P E(5) & L(2)] [P,

5,001 30,000

P, E(20)

[P, E(10)& I(20)] or [P, E(5) & L(10)]

[P, E&L(5), I(10)] or [P, E(5) & L(1)]

30,001 50,000

P, E(20)

P, E&L(5), I(15)

P, E&L(5), I(10)

P, E(5), I(20)

P, E(5), I(20)

P, E(5), I(20)

P

P

P **

Field Erect Tank Portable Containers

Inspection Schedule/Table P–Periodic Inspection by Owner E-External Inspection by Certified Inspector IInternal Inspection L-Leak Test Size, Gallons

Shop built tank

Category 1

Category 2

Category 3

0 - 1100

P

P

P, E&L(10)

1101 5,000

P

P, E&L(10)

[P, E&L(5), I(10)] or [P E(5) & L(2)] [P,

5,001 30,000

P, E(20)

[P, E(10)& I(20)] or [P, E(5) & L(10)]

[P, E&L(5), I(10)] or [P, E(5) & L(1)]

30,001 50,000

P, E(20)

P, E&L(5), I(15)

P, E&L(5), I(10)

P, E(5), I(20)

P, E(5), I(20)

P, E(5), I(20)

P

P

P **

Field Erect Tank Portable Containers

Category 3 Portable containers ** Owner shall either discontinue use of portable container or have DOT tested ◦ ◦ ◦

Plastic container - 7 years Steel container - 12 years S i l Stainless SSteell container i - 17 years

8

Inspection Schedule/Table P–Periodic Inspection by Owner E-External Inspection by Certified Inspector IInternal Inspection L-Leak Test Category 1

Category 2

0 - 1100

P

P

P, E&L(10)

1101 5,000

P

P, E&L(10)

[P, E&L(5), I(10)] or [P E(5) & L(2)] [P,

5,001 30,000

P, E(20)

[P, E(10)& I(20)] or [P, E(5) & L(10)]

[P, E&L(5), I(10)] or [P, E(5) & L(1)]

30,001 50,000

P, E(20)

P, E&L(5), I(15)

P, E&L(5), I(10)

P, E(5), I(20)

P, E(5), I(20)

P, E(5), I(20)

P

P

P **

Size, Gallons

Shop built tank

Field Erect Tank Portable Containers

Category 3

Inspection Schedule/Table P–Periodic Inspection by Owner E-External Inspection by Certified Inspector IInternal Inspection L-Leak Test Category 1

Category 2

0 - 1100

P

P

P, E&L(10)

1101 5,000

P

P, E&L(10)

[P, E&L(5), I(10)] or [P E(5) & L(2)] [P,

5,001 30,000

P, E(20)

[P, E(10)& I(20)] or [P, E(5) & L(10)]

[P, E&L(5), I(10)] or [P, E(5) & L(1)]

30,001 50,000

P, E(20)

P, E&L(5), I(15)

P, E&L(5), I(10)

P, E(5), I(20)

P, E(5), I(20)

P, E(5), I(20)

P

P

P **

Size, Gallons

Shop built tank

Field Erect Tank Portable Containers

Category 3

9

Inspection Schedule/Table P–Periodic Inspection by Owner E-External Inspection by Certified Inspector IInternal Inspection L-Leak Test Category 1

Category 2

0 - 1100

P

P

P, E&L(10)

1101 5,000

P

P, E&L(10)

[P, E&L(5), I(10)] or [P, [P E(5) & L(2)]

5,001 30,000

P, E(20)

[P, E(10)& I(20)] or [P, E(5) & L(10)]

[P, E&L(5), I(10)] or [P, E(5) & L(1)]

30,001 50,000

P, E(20)

P, E&L(5), I(15)

P, E&L(5), I(10)

P, E(5), I(20)

P, E(5), I(20)

P, E(5), I(20)

P

P

P **

Size, Gallons

Shop built tank

Field Erect Tank Portable Containers

Category 3

Insulated AST Remove insulation where moisture or product collects y If vapor barrier damaged, remove sections of insulation o su at o y

Inspection Schedule/Table P–Periodic Inspection by Owner E-External Inspection by Certified Inspector IInternal Inspection L-Leak Test Category 1

Category 2

0 - 1100

P

P

P, E&L(10)

1101 5,000

P

P, E&L(10)

[P, E&L(5), I(10)] or [P, [P E(5) & L(2)]

Size, Gallons

Shop built tank

Category 3

UST as AST

5,001 30,000

P, E(20)

[P, E(10)& I(20)] or [P, E(5) & L(10)]

[P, E&L(5), I(10)] or [P, E(5) & L(1)]

30,001 50,000

P, E(20)

P, E&L(5), I(15)

P, E&L(5), I(10)

P, E(5), I(20)

P, E(5), I(20)

P, E(5), I(20)

P

P

P **

Field Erect Tank Portable Containers

10

Repairs Per STI Standard SP031 – covers shopfabricated tanks only y Qualified personnel for repairs y

◦ Facility that manufactures STI, UL, etc. tanks ◦ ASME Section IX welders ◦ AWS D1.1 welders

Shop-Fabricated Typical Bottom or Head

Field-Fabricated Typical Bottom

Standard Organization y y y y

1.0 Scope 2.0 Definitions 3.0 Safety Considerations 4.0 Personnel Qualifications

y y y y

5.0 Materials and Welding 6.0 Modifications 7.0 Repairs 8.0 Testing

◦ Repair & Inspection

Special Consideration in Shop--Fabricated Tanks Shop

Scope y

Aboveground Tanks

Personnel Qualifications y

◦ Flammable & Combustible ◦ Atmospheric ◦ Built to national standards y

Repair/Modify ◦ Manufacturer of Labeled/Listed Tanks ◦ ASME Section IX ◦ AWS

What is not included?

•

◦ Underground Tanks ◦ API tanks ◦ Bolted and Riveted Tanks

•

Tester Final Inspection • STI SP001 • API 653 • Manufacturer of labeled/listed tanks

11

Modifications Section y

Repairs at knuckle

Items

y

◦ New pipe connections x Reinforcing plate when pipe >2”

y

◦ Manways

Limited repairs in knuckle area Otherwise, replace the bottom or head.

x Reinforcing plate when below liquid level

◦ New second bottom x Knuckle at bottom

Shell Repair y

Bottom Repairs

Lap Weld Patch plates ◦ Shape ◦ Over existing welds

y y

Weld Spacing Plate Inserts

T Joints and Knuckles

Testing Testing of all repairs and modifications required y Significant repair examples (requires tank pressure p essu e test) y

◦ Complete replacement of bottom ◦ Patch plate greater than 12 square feet ◦ Openings greater than 12 inches diameter y

Final inspection by SP001 inspector or tank manufacturer

12