API 653 Tank Inspection Support in Alabama

Short answer: In Alabama, an API 653 tank inspection is evaluated and signed by the owner's API 653 Authorized Inspector. Alabama has no broad state rule that prescribes API 653, so the obligation usually comes from federal rules: EPA's SPCC integrity-testing requirement, PHMSA's breakout-tank rule and OSHA process safety management. Atlantis performs the NDE behind the inspection, floor MFL with UT prove-up, shell UT, weld examination and settlement data, and hands it to your inspector in a structured digital report.

Alabama's tank population is split between two very different worlds. Down on Mobile Bay there is a refinery, a deep-water port with liquid bulk terminals, chemical plants along the Mobile and Tombigbee rivers and a hurricane season that shapes every outage plan. In the north there are product pipeline terminals around Birmingham, a refinery in Tuscaloosa, Tennessee River chemical plants around Decatur and the fuel farms that serve Huntsville's aerospace and defence sector. In between sit pulp and paper mills, power stations and oil-field tank batteries. This page explains where those tanks are, what API 653 asks of their owners, which Alabama and federal bodies have a say, and what Atlantis does. Atlantis performs the NDE; your API 653 Authorized Inspector remains inspector of record and signs the inspection report. To start, send us your Alabama tank list.

Where API 653 tanks are in Alabama

Direct answer: Alabama's field-erected steel tanks are concentrated around Mobile Bay (the Saraland refinery, Port of Mobile liquid bulk terminals, Theodore and the north Mobile County chemical corridor), at the Tuscaloosa refinery, at product pipeline terminals in the Birmingham area, at Tennessee Valley chemical and industrial plants, and at pulp and paper mills, power plants and military installations across the state.

Mobile Bay: refining, port terminals and chemicals

The refinery at Saraland, just north of Mobile, is the largest single concentration of crude and product tankage in the state. It changed hands from Shell in 2022 and its owner went through a Chapter 11 reorganisation in 2024, so inspection histories and tank records have passed through more than one management system in a short time, which is exactly when a clean baseline survey earns its keep. The Port of Mobile handles crude, refined products, chemicals and vegetable oils through liquid bulk terminals on the Mobile River and around Blakeley Island and Theodore. North of the city, the chemical plants along the Mobile and Tombigbee rivers in the McIntosh and Axis area store feedstocks, intermediates and finished chemicals in carbon-steel and stainless tanks, some built to API 650 and others to different construction standards. Humid, salty air and a high water table make external corrosion and soil-side floor corrosion the dominant concerns along the bay.

Tuscaloosa and west-central Alabama

Hunt Refining operates a refinery in Tuscaloosa that produces asphalt, fuels and specialty products, with heated asphalt and residual tanks alongside light-product storage. Heated tanks behave differently from ambient tanks: insulation hides the shell, temperature cycling stresses the shell-to-bottom weld, and corrosion under insulation can run unseen for years. Smaller refining capacity also exists in the south of the state at Atmore.

Birmingham and the product pipelines

Both the Colonial and Plantation product pipelines cross north-central Alabama on their way from the Gulf Coast to the Southeast and Mid-Atlantic, and the Birmingham area holds delivery terminals and distributor tank farms that load trucks for much of the state. Pipeline-connected tanks used to relieve surges or receive and store product between pipeline segments are breakout tanks under federal rules, which brings PHMSA's API 653 requirement into play. Terminal tanks that only load trucks are usually covered by SPCC rather than PHMSA.

Tennessee Valley: Decatur, Huntsville and the north

Decatur's industrial district along the Tennessee River hosts chemical, polymer and metals plants with process and bulk storage tanks. Huntsville is dominated by aerospace, defence and research, where fuel storage at Redstone Arsenal, airports and test facilities is the main tank population. TVA generating stations in the valley store fuel oil and treatment chemicals. Further east, Anniston and Gadsden add metals and defence-related industry.

Pulp and paper, power and oil fields

Alabama is one of the country's leading pulp and paper states, and its mills store fuel oil, chemicals and process liquors in large tanks that may or may not have been built to API 650. Coal and gas-fired power plants hold fuel oil and water-treatment chemicals. In the southwest, the Citronelle field and other onshore production areas use production tanks that are normally managed under API RP 12R1 rather than API 653, and natural gas from Mobile Bay's state-water platforms comes ashore to processing facilities on the bay. Knowing which construction standard each tank was built to is the first question in any Alabama tank programme, because it decides whether API 653 is the right yardstick at all.

What API 653 requires, in plain terms

Direct answer: API 653 covers inspection, repair, alteration and reconstruction of in-service atmospheric steel tanks built to API 650 or API 12C. It calls for monthly owner checks, a formal external inspection by the Authorized Inspector at least every five years, shell UT surveys, and an out-of-service internal inspection with intervals tied to measured corrosion. The current Fifth Edition carries addenda through Addendum 4 (July 2025).

Routine in-service checks. Owner or operator personnel look at each tank at least monthly for leaks, shell distortion, signs of settlement, coating failure, roof and seal damage, and foundation problems. On the Gulf Coast that walk-down naturally covers rainwater on floating roofs, blocked roof drains and storm damage after a tropical system.

Formal external inspection. The Authorized Inspector performs an external inspection at least every five years, or sooner when shell corrosion is rapid, because the code links the interval to a quarter of the remaining shell corrosion life.

Shell UT thickness. Where UT readings are used, the code requires them within five years while the corrosion rate is unknown, then at the lesser of half the remaining shell corrosion life or fifteen years.

Internal inspection. For a new tank, the first internal inspection is due within ten years. Credits for safeguards such as a fibreglass-reinforced lining, cathodic protection or a thicker bottom can extend that initial interval, up to twenty years without a release prevention barrier or thirty with one. Later intervals are calculated from measured bottom corrosion within the same ceilings, or set by a risk-based assessment that meets the code's conditions and is carried out by the owner's specialists.

Settlement, brittle fracture and repairs. API 653 also contains a settlement evaluation annex, a brittle-fracture screening procedure and rules for repairs, alterations and hydrostatic testing. Addendum 4 revised the text on measuring tank-bottom plate thickness, so check procedures against the current edition and addendum from api.org. These are engineering decisions for the owner and the inspector. Background reading: API 653 tank inspection intervals explained and the API 653 tank inspection guide.

Alabama regulations that sit on top of API 653

Direct answer: Alabama does not run a statewide aboveground tank integrity programme that cites API 653. ADEM registers motor-fuel ASTs that want coverage from the state's storage tank Trust Fund, and that coverage depends on staying in substantial compliance with federal SPCC rules. The API 653 obligation itself usually comes from EPA SPCC, PHMSA's breakout-tank rule, OSHA PSM and owner policy. Confirm current requirements with ADEM and the Alabama Public Service Commission.

ADEM and the Alabama Underground and Aboveground Storage Tank Trust Fund

The Alabama Department of Environmental Management's storage tank work focuses mainly on underground tanks. For aboveground tanks, ADEM's role is narrower: owners of ASTs that hold motor fuel can register them on ADEM Form 283 so that cleanup of an eligible release can be reimbursed from the Alabama Underground and Aboveground Storage Tank Trust Fund, under ADEM Administrative Code Chapter 335-6-16. Eligibility requires the tank to be registered, not owned by the state or federal government, and in substantial compliance with state and federal AST requirements, including a valid SPCC plan where one is required. In practice that ties Trust Fund protection to the same integrity testing SPCC already demands. ADEM can also require an industrial stormwater permit depending on the facility's classification. Because the programme and its forms change, confirm current details with ADEM's Groundwater Branch.

EPA SPCC, administered by EPA Region 4

Most Alabama tank owners meet API 653 through EPA's Spill Prevention, Control and Countermeasure rule, 40 CFR Part 112, which EPA Region 4 enforces in Alabama. Facilities above the rule's storage thresholds must test or inspect bulk storage containers for integrity on a regular schedule and whenever material repairs are made, following industry standards. For field-erected tanks the industry standard is API 653; for shop-built tanks it is usually STI SP001. The SPCC plan, certified by a professional engineer where required, should state which standard each tank follows and when the next inspection is due, and the inspection records need to be kept with the plan.

PHMSA and the Alabama Public Service Commission

Under 49 CFR 195.432, steel aboveground breakout tanks on regulated hazardous-liquid pipelines that operate at atmospheric or low pressure must be inspected in accordance with API 653, excluding the code's alternative risk-based internal-inspection interval; pressurised breakout tanks follow API 510. In Alabama, interstate lines such as Colonial and Plantation are inspected by PHMSA's Office of Pipeline Safety. Through PHMSA certification, the Gas Pipeline Safety Section of the Alabama Public Service Commission inspects and enforces the federal rules on intrastate gas and hazardous-liquid pipelines, including the hazardous-liquid systems that operate wholly inside the state. If you own a breakout tank on an intrastate line, the PSC is likely to be the agency that reviews your API 653 records; confirm the jurisdiction for your system with the PSC.

OSHA PSM and the fire code

Alabama does not have an OSHA State Plan for private employers, so federal OSHA enforces 29 CFR 1910.119. At the refineries and at chemical plants with covered processes, the mechanical-integrity element requires inspection and testing following recognised and generally accepted good engineering practices, and API 653 is the practice most owners cite for atmospheric tanks inside a covered process. Fire-code requirements for flammable and combustible liquid storage are administered through the State Fire Marshal and local fire authorities; confirm locally which edition applies to a new or altered tank.

Radiography in Alabama

Alabama has been an NRC Agreement State since 1966, so industrial radiography licences are issued by the Alabama Department of Public Health's Office of Radiation Control. Repair-weld radiography is carried out only by crews properly licensed for work in Alabama.

NDE methods for API 653 work in Alabama

Direct answer: Alabama tank work centres on floor MFL scanning with UT prove-up for soil-side corrosion, shell and annular-plate UT, corrosion mapping on marine-exposed and insulated shells, visual examination of roofs, seals and foundations, MT, PT and vacuum-box testing after repairs, PAUT or RT on new welds, and settlement survey data for the inspector.

Every procedure is reviewed by an ASNT NDT Level III and technicians are certified to an SNT-TC-1A written practice for each method. Every reportable MFL indication is proved up with UT so the inspector sees remaining thickness rather than a signal amplitude. For the trade-offs between floor methods see MFL versus UT for tank floors, and for the full scope see aboveground storage tank inspection.

How Atlantis supports your Authorized Inspector

Direct answer: Atlantis takes the scope from your API 653 inspector's plan, performs the NDE, checks the data before the crew leaves site and delivers a digital report the inspector can evaluate and sign. We are not an Authorized Inspection Agency and we do not supply API-certified inspectors. Many Alabama competitors sell the inspector and the NDE as one package; we sell the NDE behind the inspector, which keeps your data independent.

1. Scope from the inspector's plan: floor coverage, shell and annular-plate locations, roof, seal and foundation examinations, weld examinations and settlement points.
2. Procedure review by an ASNT NDT Level III, matched to the tank's construction standard and the acceptance references your inspector uses.
3. Examinations by technicians certified to an SNT-TC-1A written practice: MFL with UT prove-up, shell and annular UT, corrosion mapping, visual, surface and volumetric methods.
4. Data QA on site: readings checked against calibration records and the previous inspection before demobilising, so gaps are closed while the tank is still open.
5. Digital report in our reporting platform: floor maps, prove-up readings, shell readings by course and location, weld records, photographs, calibration data and technician certifications, built on report templates that match your inspector's file and your SPCC records.
6. Inspector evaluation and sign-off: the inspector evaluates the data, decides on repairs and sets the next inspection dates.
7. Reuse at the next interval: the same locations are measured next time, tracked in our inspection-management ERP or on a digital twin of the tank farm.

We can calculate corrosion rates and remaining life from our thickness data for the inspector's review. The interval decision belongs to the inspector and the owner under API 653 and whichever federal or state rule applies. Atlantis performs the NDE; your API 653 Authorized Inspector remains inspector of record and signs the inspection report. Request an NDE scope for your inspector's plan, or see API 653 tank inspection support for what the service covers.

Planning around turnarounds, hurricanes and operations

Direct answer: On Alabama's Gulf Coast, out-of-service tank inspections are best planned outside the peak of hurricane season, with cleaning, NDE, repairs and return to service run as one sequence. In-service work, external UT, corrosion mapping and visual inspection, can be done year-round, and north Alabama terminals can schedule around pipeline cycles and seasonal product demand.

Hurricane season. The Atlantic season runs from June through November, and Mobile Bay has taken direct or near hits from storms such as Katrina in 2005 and Sally in 2020. An empty tank opened for internal inspection is vulnerable to flotation in storm surge and to wind damage, so owners usually avoid having large tanks out of service during the peak months, or plan to ballast them with water if a storm threatens. After a storm, floating roofs, seals, drains, shell stiffeners and foundations need checking before normal operation resumes, and Atlantis can collect that data once the site is safe.

Cleaning and gas-freeing. Internal inspections depend on the tank being emptied, cleaned and certified safe for entry. The NDE crew should arrive when cleaning finishes, not days later, and the plan should allow time for UT prove-up of MFL indications and for repair decisions before the repair crew mobilises. Building the floor scan, the prove-up, the inspector's evaluation and the repair scope into one schedule is the biggest single saving on most internal inspections.

Turnarounds and pipeline cycles. At the Saraland and Tuscaloosa refineries, tank work is often scheduled around unit turnarounds and product slates. At Birmingham-area terminals, taking a tank out of service depends on pipeline delivery cycles and seasonal demand, so in-service shell surveys are often done well ahead of the out-of-service internal to help the inspector plan.

Heat and humidity. Summer heat affects technician safety inside tanks and on black-painted shells, couplant behaviour and coating repairs. Early starts, ventilation and temperature-corrected UT readings are standard. Book a scoping call to fit inspections around your season and outages.

API 653 inspection support across Alabama

Direct answer: Atlantis mobilises crews to tank sites anywhere in Alabama on a schedule agreed during scoping: Mobile, Saraland, Theodore and the north Mobile County chemical corridor, Tuscaloosa, the Birmingham pipeline terminals, Decatur and Huntsville in the Tennessee Valley, and mills, power plants and production sites in between.

• Mobile Bay: refinery tankage, port liquid bulk terminals and chemical plants; see third-party inspection in Mobile for the wider inspection support we provide in the area.
• Huntsville and north Alabama: aerospace, defence and industrial fuel storage; see third-party inspection in Huntsville.
• Birmingham: pipeline delivery terminals and distributor tank farms, many of them breakout or SPCC-regulated tanks.
• Tuscaloosa and west Alabama: refinery, asphalt and heated-product tanks.
• Decatur and the Tennessee River: chemical and industrial bulk storage.
• Statewide: pulp and paper mills, power stations and military fuel farms.

The piping and pressure vessels at the same sites follow their own codes; see our companion hubs for API 570 piping inspection in Alabama and API 510 pressure vessel inspection in Alabama, and the statewide NDT inspection services in Alabama page. Pipeline operators can also see pipeline inspection services.

What to send us for a quote

Direct answer: Send your tank list, the last API 653 reports, your inspector's plan, access and cleaning status, and your target dates. We return a scoped NDE quote within 24 hours.

1. Tank list and drawings: tank IDs, diameter, height, roof type, product, year built, construction standard, plate thicknesses, bottom history, cathodic protection and leak detection, and whether the tank is a PHMSA breakout tank, inside a PSM-covered process or registered with ADEM.
2. Previous reports: external and internal API 653 reports, floor maps, shell readings, settlement surveys and any risk-based inspection assessment.
3. The inspector's plan: examinations, coverage, acceptance references and report format, with the name of your Authorized Inspector or agency.
4. Access and cleaning: whether the tank will be in service, emptied or cleaned and gas-free, scaffold and confined-space arrangements, site orientation and permit requirements.
5. Dates: SPCC or regulatory due dates, turnaround windows, pipeline schedule constraints and hurricane-season limits.

Get a quote within 24 hours.

Frequently asked questions: API 653 tank inspection in Alabama

Who can perform an API 653 inspection in Alabama?

An API 653 Authorized Inspector, employed by the owner or by an inspection agency, is responsible for the inspection and signs the report. Qualified NDE technicians collect the thickness, floor and weld data. Atlantis performs that NDE with ASNT-certified technicians under Level III oversight and delivers the results to your inspector.

Does Alabama law require API 653 inspections?

Not through a general state tank rule. The requirement normally comes from EPA's SPCC rule, PHMSA's breakout-tank rule at 49 CFR 195.432, OSHA PSM at covered facilities, or your own corporate standard. ADEM's Trust Fund coverage for registered motor-fuel ASTs depends on SPCC compliance. Confirm your obligations with ADEM and your SPCC plan.

Do I need to register my aboveground tank with ADEM?

Registration on ADEM Form 283 is how owners of motor-fuel ASTs become eligible for Alabama Underground and Aboveground Storage Tank Trust Fund coverage if a release occurs. Eligibility also requires substantial compliance with state and federal AST requirements. Confirm current forms and eligibility with ADEM.

Who regulates breakout tanks in Alabama?

PHMSA inspects interstate pipelines such as Colonial and Plantation. The Alabama Public Service Commission, through PHMSA certification, inspects intrastate gas and hazardous-liquid pipelines. Either way, steel atmospheric breakout tanks must be inspected in accordance with API 653 under 49 CFR 195.432, without the code's risk-based internal interval.

How often does a storage tank need an API 653 inspection?

Monthly owner checks, a formal external inspection at least every five years, shell UT on an interval set by the corrosion rate, and an internal inspection first due within ten years, then on a calculated interval inside the code's ceilings. Your inspector sets the actual dates.

Should we avoid internal inspections during hurricane season?

Many Gulf Coast owners avoid having large tanks empty during the peak months because an empty tank can float in storm surge. If an internal must happen then, plan for water ballast and a storm procedure. External UT and visual work can continue.

Is Atlantis an Authorized Inspector?

No. We are not an Authorized Inspection Agency and we do not supply API-certified inspectors. We perform and document the NDE; your inspector evaluates it and signs, so the data stays independent of the sign-off.

Can you inspect a tank while it stays in service?

Yes, for external work: shell UT, corrosion mapping, visual examination of the shell, roof and foundation, and settlement data. The floor needs the tank emptied and cleaned for MFL scanning and prove-up.

What certifications do your NDE technicians hold?

Technicians are certified to an ASNT SNT-TC-1A written practice for each method, with procedures reviewed by an ASNT NDT Level III. Radiography is performed only by crews licensed through the Alabama Department of Public Health's Office of Radiation Control.

Do you perform RBI or fitness-for-service assessments?

No. Risk-based inspection and fitness-for-service assessments are carried out by the owner's engineers or specialist consultants. Atlantis supplies the floor, shell and weld data those assessments use.

Do you offer API 653 certification training?

No. Atlantis provides ASNT SNT-TC-1A NDT training only, including NDT training in Alabama. For the API certification route, see our API inspector career guide.

How quickly can a crew reach Mobile or Birmingham?

Crews are mobilised to your site on a schedule agreed during scoping, built around your cleaning, turnaround and pipeline dates. Send tank details for a quote within 24 hours.

Plan your Alabama tank inspections

Whether it is a floor scan on a crude tank at Saraland, a shell survey at a Birmingham terminal or post-storm checks on floating roofs around Mobile Bay, start with your inspector's plan and your outage window. Send us your tank list, or see NDT consulting in Alabama for Level III procedure and written-practice support.

More Atlantis NDT services in Alabama

• NDT training and certification in Alabama
• Level III consulting in Alabama
• NDT inspection services in Alabama
• API 510 pressure vessel inspection support in Alabama
• API 570 piping inspection support in Alabama
• Practical NDT simulator in Alabama

Part of the wider aboveground storage tank inspection service at Atlantis NDT.