NDT Simulator and Storage Tank Inspection Practice in Portland, Maine

Look across the Fore River from Portland's Old Port and the skyline on the South Portland side is dominated by storage tanks. South Portland is Maine's largest oil port, with more than a hundred tanks spread across several marine terminals, holding gasoline, diesel, heating oil, asphalt and heavy fuel oil that supply much of northern New England. A products pipeline runs north from the waterfront toward Bangor, and a World War II era crude line once carried tanker cargoes all the way to Montreal refineries before flows essentially stopped in 2016. That concentration of aboveground storage, marine loading lines and buried pipe makes greater Portland one of the most tank-intensive places in the Northeast, and tank inspection is exactly the kind of work that suffers when technicians only do it a few weeks a year. Atlantis built the first-ever online practical NDT simulation portal for practice and hands-on experience, and Practical NDT gives Portland-area inspectors an immersive, 3D, game-like place to rehearse it: shell thickness surveys, floor screening, weld inspection and more, with scored feedback in a browser or app. It supports NDT practice in Portland alongside real training and exams, never replacing them.

Why Hands-On Practice Matters for Maine's Tank Farms and Marine Terminals

Tank inspection looks simple from the outside and is anything but in practice. A shell thickness survey needs a sensible grid, careful surface preparation, correct calibration and consistent coupling on curved, weathered plate. Floor inspection with magnetic flux leakage means planning scan lanes, handling the edges and critical zone near the shell, and interpreting signals from topside and underside corrosion that can look alike. Then come the follow-up ultrasonic prove-ups, weld inspection on repairs, and nozzle and piping checks. Terminals schedule this work around product movements, weather and out-of-service windows, and in Maine that often means compressing it into the warmer months. A technician who spends the winter on other jobs can arrive at the first tank of the season noticeably rusty.

Practising for tank work physically is awkward. Floor plate samples with known corrosion are heavy and hard to store, a full tank floor is obviously not available as a training aid, and reference blocks need to stay in good condition for calibration. Confined-space entry, hot work permits and product vapours make every hour inside a real tank carefully controlled, so it is not a place for anyone to learn the basics by trial and error. Practical NDT gives inspectors a full-size virtual tank to scan as many times as they like. Trainees learn the pattern of a survey before setting foot on scaffolding; experienced technicians refresh MFL interpretation before an outage season. Less time learning on the job means less time exposed to the real hazards of tank interiors, and fewer surprises when the data is reviewed.

Methods You Can Practice: Tank, Weld and Plant Scenarios

Practical NDT covers 12 methods. Surface methods: penetrant testing (PT), magnetic particle testing (MT) and visual testing (VT). Volumetric methods: contact ultrasonic testing (UT), phased array ultrasonic testing (PAUT), time-of-flight diffraction (TOFD) and radiographic testing (RT). Electromagnetic methods: eddy current testing (ET) and magnetic flux leakage (MFL). Specialist techniques: long-range ultrasonic testing (LRUT) guided-wave screening, internal rotary inspection system (IRIS) for heat-exchanger and boiler tubes, and positive material identification (PMI).

For a Portland crew, the Storage Tank environment is the natural starting point. It is built around UT shell thickness surveys and MFL floor screening on a full-size tank, the two workhorse techniques behind most aboveground storage tank inspections. Users practise grid layout, calibration, readings on corroded and pitted plate, and floor scanning with the realistic complications of lap welds, sumps and the annular region. The Oil and Gas Site environment extends that to the rest of a terminal or plant: weld inspection on piping, corrosion surveys, IRIS on exchanger tubes, LRUT screening on long pipe runs such as dock lines and road crossings, and PMI on replacement components. As an ultrasonic testing simulator, the platform also covers angle-beam weld inspection for repair welds and nozzle reinforcements, and the phased array simulator adds encoded corrosion mapping and weld scanning.

There are five environments in total: the NDT Lab with bench specimens and reference blocks, the Welding Workshop with weld coupons and fabrication joints, the Aircraft Hangar for airframe and component inspection, the Oil and Gas Site and the Storage Tank. Job libraries include 52 jobs in the NDT Lab, 52 in the Welding Workshop, 54 in the Aircraft Hangar and 73 at the Oil and Gas Site, supported by 33 guided lessons. The Welding Workshop is valuable for Maine's shipbuilding and fabrication suppliers, and the Aircraft Hangar supports aviation maintenance and the state's aircraft engine component manufacturing.

Built for Every Skill Level

New trainees start with guided fundamentals: what each method detects, how to calibrate, how to scan systematically and how to decide whether a reading or signal matters. Scenarios build gradually, so someone who has never seen an MFL floor scan can reach a point where the concepts make sense before their first real tank.

Working technicians use rare-defect refreshers between assignments. In a seasonal market, that is the core use case: a quick run through shell survey scenarios and floor screening interpretation before the first tanks of the year, or a refresher on angle-beam UT before a repair campaign. The scored feedback shows exactly where accuracy has slipped, which is more useful than a general sense of being out of practice.

Level III inspectors and team leads can build and assign scenario sets, benchmark crews objectively against identical simulated tanks and welds, and find coverage gaps. For a small Maine inspection company that pulls in extra technicians for the busy season, that is a practical way to check who is ready for what before assigning them to a terminal. The scenario library was designed by Anoop Rayavarapu, ASNT NDT Level III and founder of Atlantis NDT, who also leads Atlantis training.

How It Complements Formal ASNT Training and NDT Practical Exam Preparation

To be clear: Practical NDT is a skills-practice and readiness tool. It does not certify anyone, it does not grant a Level I, II or III, and it does not replace the practical examination on real specimens that ASNT SNT-TC-1A and an employer's written practice require. Under SNT-TC-1A, certification is the employer's responsibility, and the practical exam uses real equipment on real parts. A simulator is no substitute for that, and Practical NDT is not presented as one.

What it offers is better preparation and better retention. For NDT practical exam preparation, candidates can rehearse a practical many times over: choose the technique, calibrate, scan, record and evaluate. Once certified, technicians can use the platform to keep skills fresh through the off-season. It is designed to work alongside Atlantis's Level I, II and III NDT training. Tank owners in Maine also commonly work to API 653 for aboveground storage tank inspection and may require inspectors who hold that credential; that is market context about what local employers may require, not something Practical NDT trains toward or certifies.

Portland's Inspection Landscape: Oil Port, Shipyards and Industry

The petroleum terminals along the Fore River in South Portland remain the single biggest concentration of NDT-relevant energy infrastructure in Maine. Several marine terminals, a tank count well above one hundred, a refined products pipeline to Bangor and the largely idle crude pipeline corridor to Montreal together generate steady demand for tank inspections, piping corrosion surveys, dock line inspections and weld inspection on repairs and modifications. Portland Harbor also handles container, cargo and cruise traffic and supports fishing and marine services along the waterfront. The Storage Tank and Oil and Gas Site environments map directly onto that work.

Shipbuilding sits on either side of the city. About forty miles up the coast, the Kennebec River shipyard at Bath builds destroyers for the US Navy, and about fifty miles south, the naval shipyard at Kittery overhauls submarines. Both support supply chains of fabricators, machine shops and inspection firms across southern Maine, where weld inspection by UT, PAUT, MT and RT is constant. The Welding Workshop environment is where Portland-area technicians supporting that supply chain would spend most of their practice time. Aviation adds another thread: Portland International Jetport handles commercial traffic and maintenance, and southern Maine is home to aircraft engine component manufacturing, both of which fit the Aircraft Hangar environment with ET and PT.

Beyond those anchors, Maine's pulp and paper mills, biomass and fossil generating plants and hydro facilities need boiler tube inspection, pressure vessel inspection and structural checks, and the bridges on the I-295 and I-95 corridors and over the Fore River need MT, UT and VT. Industrial radiography in the state is regulated by the Maine CDC Radiation Control Program, since Maine is an NRC Agreement State; simulated RT interpretation lets technicians build image-reading skill without source handling. All of these industries and agencies are named as regional context only, not as customers or partners.

Hands-On NDT Training in Portland, Maine: Where Virtual Practice Fits

Hands-on NDT training in Maine still requires qualified instructors, real specimens and calibrated equipment. The challenge in a geographically large, lightly populated state is access: travelling to a training centre can mean a long drive and nights away from home, and small inspection firms cannot easily release people for extra practice days. Virtual NDT training helps with exactly that. Technicians can practise from home or from a site office in the evening, without travel and without borrowing equipment. Before a formal course, they can learn the flow of each method so instructors can focus on the hands-on work that only real equipment can teach. After certification, they have a library of scenarios to stay sharp through slow periods. For employers bringing in seasonal help, a short scenario set is an easy way to confirm competence on tank surveys or weld inspection before assigning work.

Bringing Practical NDT to Your Portland Team

Atlantis built the first-ever online practical NDT simulation portal for practice and hands-on experience, and bringing it to a Maine team starts with a short demo. We walk through the five environments, the 12 methods and the scoring, then look at your work mix: terminal and tank inspection, shipyard supply chain weld inspection, mill and power plant work, aviation or a combination. We then recommend a starting set of scenarios, for example the Storage Tank environment with UT shell surveys and MFL floor screening for a tank crew, or the Welding Workshop with PAUT and MT for a fabrication inspection team. Level III and lead users can build and assign their own scenario sets. Access runs in a browser or app, which suits dispersed crews. Pricing is quote on request; the platform is affordable, accessible and fully customisable. Request a Practical NDT demo for your Portland team, or write to info@atlantisndt.com.

Frequently Asked Questions

Does Practical NDT replace the practical certification exam?

No. It is a practice and readiness tool. Under ASNT SNT-TC-1A, the employer certifies personnel through its written practice, and the practical exam must be performed on real specimens with real equipment. Practical NDT helps people prepare and stay current, but it does not certify anyone.

What experience level is it for?

Every level. New trainees follow 33 guided lessons, working technicians use rare-defect refreshers between assignments, and Level III inspectors and team leads build scenario sets, benchmark crews and find coverage gaps.

Can we practise storage tank inspection on the simulator?

Yes. The Storage Tank environment covers UT shell thickness surveys and MFL floor screening on a full-size tank, which suits crews that inspect the South Portland terminals and other tank farms. Ask for a storage tank demo.

Is it useful for shipyard supply chain inspectors?

Yes. The Welding Workshop environment has 52 jobs on weld coupons and fabrication joints, with UT, PAUT, TOFD, MT and RT interpretation available. It is a practical place to rehearse weld inspection. Naval work often carries additional customer qualification requirements, which remain with the employer.

How do we get started?

Request a demo through our contact page and tell us about your team and methods. We will map the environments to your work and provide a quote on request. Book a Portland demo.

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