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Inspection of Shop FabricatedASTs per the SPCC Rule
Inspection of Shop FabricatedInspection of Shop Fabricated
ASTs per the SPCC RuleASTs per the SPCC Rule
Wayne B. Geyer, P.E.
Steel Tank InstituteA Division of STI/SPFA
Wayne B. Geyer, P.E.Wayne B. Geyer, P.E.
Steel Tank InstituteSteel Tank InstituteA Division of STI/SPFAA Division of STI/SPFA
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Few states have any certifications for ASTinstallers and it shows in the creativeways the tank systems are installed.
- J ohn Cignatta, course instructor forSTI AST inspector certification
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Doorways in dikes No overfill alarms
..
adequatecontainment
Leaking tank
Major Facility
Review of 28 tanks at a
Nearly 90% lackedadequate venting
Over 50% lacked
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Review of 28 tanks at aMajor Facility
0 20 40 60 80 100
Serious Other
Emergency Vent
Overfill
UL Listing
Containment
Normal Vent
Spill Control
% of tanks
Missing i
tem
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API 653 or STISP001
Requires Integrity
Revised SPCC Rules
References industrystandards
Tank inspection per
Testing
Visual inspectionalone no longersufficient
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Test Each AbovegroundContainer for Integrity
Section 112.8(c)(6) On a regular schedule
Combine visual inspection withanother testing technique Hydrostatic testing Radiographic testing
Ultrasonic testing Other nondestructive shell testing
Frequently inspect the outside of
Acoustic emissions testing
container
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Show me some tanks!!!
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AST Standardsfor Shop Fabricated Tanks
API - American Petroleum Institute
UL - Underwriters Laboratories
SwRI - Southwest Research Institute
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API Specifications
API 12F Specification for Shop Welded Tanks for
Storage of Production Liquids
Vertical, cylindrical only API 650, Appendix J
Shop Assembled Welded Steel Tanks
for Oil Storage
Vertical, cylindrical only
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API Vertical Tanks
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API Vertical-UL Horizontal Tanks
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Underwriters Laboratories
UL 142 SteelAboveground Tanks forFlammable and
Combustible Liquids UL 2085 Protected
Aboveground Tanks for
Flammable andCombustible Liquids
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UL 142 Steel thickness
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UL 142 type tanks
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UL 142 type tanks
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STI SP001-03
Standard for Inspection ofInService Shop
Fabricated AbovegroundTanks for Storage of
Combustible andFlammable Liquids
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How STI SP001 differs fromAPI 653
API 653 emphasis is the large, fieldconstructed tanks per API 650.
Strictly vertical tanks.
The bottom of the tank is not visible.
API 653 requirements are needed
because Large volume
Large pressure
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How STI SP001 differs fromAPI 653
API 650 includes equations forcalculating the steel thickness neededfor a particular tank.
API 653 allows for / requires more
judgement by inspector
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Shop fabricated tanks Tables that specify the steel thickness
Manufactured in controlled shopenvironments
How STI SP001 differs fromAPI 653
based on tank diameter and capacity.
Smaller capacities and smaller hydrostaticpressures
Capacity up to 50,000 gallons.
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50,000 gallon tank
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Corrosion concerns
Check corroded
areas to findminimum thickness
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Single wall tanks restingdirectly on the ground are a
concern!!
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Periodic Inspection by tank owner
>Water inside tank
> Vents> Pipe connections> Exterior paint> Foundation
www.steeltank.com/library/pubs/waterinfueltanks.htm
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Certified Inspection
Performed by Qualified Tank Inspector STI Trained and Certified
API Certified
Every 10 Years
All types of tanks (single and double
wall, on ground and elevated)
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September 20 - 24 Tennessee
J une 14 - 18 California
J uly 19 - 23
STI AST Inspector Training
Michigan May 24 - 28
New York
NEW for 2004 Level 1
Tank inspector
Level 2 Tank system
inspector
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Level 2 Tank System
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Tank type dictates inspection method:Single wall not in contact with
ground
Single wall in contact withground
Double wall or double-bottom
STI Certified Inspection
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Double wall or double-bottom
Check leak
detection system
Check for water orfuel in interstice
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STI Certified Inspection UT Testing by
scanning if possible Most reliable method
for determining wallthickness
Qualified UT inspectornecessary (ASNTSpecifications)
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Must compare remaining wallthickness to original thickness
6. Certified Inspection Criteria
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STI SP031-04
Standard for Repair ofInService ShopFabricated
Aboveground Tanksfor Storage of
Combustible andFlammable Liquids
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Patches New bottoms
SupervisingPersonnel
STI inspectors
SP031 Repair Standard
Adding openings
Supportmodifications
API inspectors
Repair Personnel
Tank manufacturer Testing of repairs
ASME welders
AWS welders
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Tank owner surprises
Not all that meets the eye!
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Tank #1
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Tank #1
No grounding anywhere
Unsecured AST's in a flood plain (Not a single anchorbolt)
Many Electric Code Violations
Improperly Secured Conduits
OSHA Access Issue on the back stairs and topplatform
PVC Caps atop various nozzles (No Fire Rating forPVC)
Labeling Issues
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Tank #2
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Tank #2
Fuel Piping
Unsupported Pipes
Leaking SubmersibleTurbine Pump
No CP on buried fuelpipe runs
Electric Code Violations
Kinked Flex Connector
Improperly Installed
Combustible Materialsstored inside dike
Poor Control on Tank
Pipes and conduits too
close in pipe trench Unsupported Conduits
Missing Fire Diamonds
Filling Routine Spillage
Conduits between fuelpipes in pipe trench
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Tank #3
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Tank #3
Unsupported conduits
Valve on Return Piping
tank's annular space
No Vehicle Damage
PVC Caps on various tanknozzles
Flex Fuel lines secured toUnistrut with conduitclamps
Normal vent on secondary
No fire diamonds
Improper labeling ofnozzles
bottom)
Veeder-Root bottomwater floats can get hungup on shafts if rustymuck/mud forms in
Tank not being stickedto check either ATGSaccuracy oraccumulation of water
Protection (i.e., bollards)
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Get the BIG picture first
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Enough openings ontop?
underground? Tank next to river, is
it anchored?
Supports more than12 in. high?
Condition offoundation?
From 20 feet away.
Dirt spots on tank,fuel spilled?
Coated for Adequate
containment? Paint condition?
Level gauge visible?
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Adequate supports?
condition? Weep holes? Use
UV light here
Closer inspection
Emergency ventcondition?
Normal vent
Look inside tank, butwith proper trainingonly.
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New STI StandardsCommittee
To review inspection standards
SP001
SP031
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Does this Comply?
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I ti f T k
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Inspection of TanksKeeps Things Happy