Aboveground storage tanks are everywhere — refineries, terminals, pipeline stations, chemical plants. And the certified professionals qualified to inspect them are in short supply.
Atlas Training | June 2026
If you work in pipeline or plant inspection and you have been hearing more about API 653 lately, that is not a coincidence. Demand for certified aboveground storage tank inspectors has been building steadily — and in 2026, it is at a level that is hard to ignore.
Operators across the energy sector are under increasing pressure to keep their tank inspection programs current. Aging infrastructure, tightening compliance expectations, and a wave of new tank construction are all pointing at the same outcome: more tanks that need to be inspected, and not enough certified professionals to do it.
If you have been thinking about adding API 653 to your credentials, the timing has rarely been better.
What API 653 Actually Is
API 653 is the American Petroleum Institute's standard for the inspection, repair, alteration, and reconstruction of aboveground storage tanks — the large, flat-bottom steel tanks used to store crude oil, refined products, chemicals, and other hazardous materials at refineries, terminals, and pipeline facilities.
The API 653 Inspector Certification is the credential that proves you have the knowledge to assess those tanks in the field — to evaluate corrosion, identify fitness-for-service concerns, determine inspection intervals, and sign off on the documentation that keeps operators compliant and facilities safe.
Without a certified API 653 inspector in the loop, operators cannot legally demonstrate compliance with the standards that govern their tank programs. That is not a technicality — it is the reason this credential carries the weight it does.
Every aboveground storage tank in service has an inspection clock running on it. When that clock runs out, someone with an API 653 certification has to show up and evaluate it. With hundreds of thousands of regulated tanks across the country, that work never stops.
Why Demand Is Rising Right Now
A few things are happening at the same time that are driving the uptick in inquiries about this certification.
First, the existing tank fleet is aging. Tanks that were built and commissioned decades ago are hitting inspection milestones and requiring the kind of detailed fitness-for-service evaluation that only a certified API 653 inspector can provide. That backlog is real and it is growing.
Second, new energy infrastructure is coming online. LNG export projects, crude storage expansions, and pipeline-connected terminal buildouts have all been adding new tank farms to the inventory — and every one of those tanks needs an ongoing inspection program staffed by certified personnel.
Third, compliance scrutiny is tightening. Operators who let their inspection records slide are finding it increasingly difficult to get away with it. The facilities that are ahead of their inspection schedules need certified inspectors to stay there. The ones that have fallen behind need certified inspectors to catch up.
All of that adds up to more work than the current pool of certified API 653 inspectors can comfortably absorb — which is exactly the kind of market condition that makes getting certified worthwhile.
The demand is there. The credential is the key. → atlasapitraining.com
What the Exam Covers — And Why It Pays to Prepare
The API 653 exam is open-book, but do not let that fool you. The standard is dense and technical, and the exam is designed to test whether you genuinely understand it — not just whether you can find the right page under pressure.
You will need a working knowledge of tank construction and design, corrosion mechanisms, inspection methods including UT and MFL floor scanning, fitness-for-service calculations, repair methods, and inspection interval determination. You will also need to be comfortable navigating API 650, API 651, and API 652 as supporting references.
Candidates who come in having practiced code navigation under timed conditions consistently outperform those who study the standard alone. That is not a guess — it is the pattern that shows up in pass rates, and it is exactly what a structured exam prep course is designed to address.
The API 653 credential is one of the more respected in the inspection industry because it is genuinely difficult to earn. That difficulty is part of what makes it valuable. The job market rewards it accordingly.
Who Should Be Looking at This Certification
If you are already working in pipeline inspection, pressure vessel inspection, or general plant inspection — you are likely closer to the eligibility requirements than you think. The API 653 certification requires a combination of documented inspection experience and education, and most working inspectors in the energy sector are already accumulating the experience hours that count toward it.
If you are an NDT technician looking to expand your scope and move into an inspection role with broader responsibility and higher earning potential, API 653 is one of the clearest paths to get there.
And if you are a certified inspector in a related discipline — API 570, API 510 — adding API 653 rounds out your credentials for the full range of fixed equipment inspection work that the Gulf Coast and Mid-Continent markets are asking for right now.
The Bottom Line
The aboveground storage tank inspection market is not a trend. It is a permanent, recurring demand built into every energy facility that operates tanks — which is most of them. The inspectors who hold an API 653 certification are not chasing jobs. The jobs are finding them.
If you have been putting this off, now is a good time to stop putting it off.