Marine & Offshore NDT Services in New Orleans 2026 — ASNT Level III Led

Atlantis NDT delivers marine & offshore ndt services in New Orleans. ASNT NDT Level III-led. New Orleans is a key hub for LNG, petrochemical & refining operations. Technicians are certified by their employer to its SNT-TC-1A written practice, and procedures and reports are reviewed by an ASNT NDT Level III (UT, RT, MT, PT, VT).

For the national service, with the methods used, what you receive and how crews are mobilised, see maritime NDT services.

Marine & Offshore Inspection Scope in New Orleans

Comprehensive NDT inspection for Marine & Offshore facilities: pressure vessels (API 510), piping (API 570), above-ground storage tanks (API 653), heat exchangers + columns, fired heaters + furnaces, offshore platforms + FPSOs (where applicable), turnaround + EPC project support. Methods: UT (including PAUT and TOFD), RT, MT, PT and VT.

Code + Compliance

Marine & Offshore facility inspections per: ASME B&PV Sections V + VIII + IX + XI; ASME B31 piping series; API 510 + 570 + 571 + 653 + 936 + 1169; NACE MR0175 + MR0103 sour-service; ASTM E-series; ISO 17635/17636/17640; AWS D1.1/3.6; IACS Rec-20 marine. Records are retained in Atlantis NDT ERP.

Free Consultation in New Orleans

Atlantis NDT publishes no pricing — pricing varies by region + scope + delivery model. Request your free 30-minute consultation with founder Anoop Rayavarapu (ASNT NDT Level III in UT, RT, MT, PT and VT). Every job is quoted on request. See also verticals, consulting, New Orleans ERP, New Orleans training.

What marine and offshore inspection actually covers

Assets in scope: hull plating and internal structure, ballast and cargo tanks, deck equipment and cranes, propulsion shafting and stern tubes, offshore jackets and topsides, risers and mooring systems.

Damage mechanisms that drive the inspection plan

General and pitting corrosion accelerated by coating breakdown in ballast tanks; grooving corrosion along weld lines; fatigue cracking at hard points, bracket toes and hatch corners; hydrogen-induced cracking in high-strength steels; and marine growth masking condition underwater.

Methods applied

Close-up visual survey, ultrasonic thickness gauging against a gauging plan agreed with the class surveyor, magnetic particle on critical welds, and ROV or diver-deployed examination for the underwater hull and subsea structure.

Governing codes and standards

IACS unified requirements and the class society rules — ABS, DNV, Lloyd's Register, Bureau Veritas, RINA, ClassNK — with thickness measurement performed by a firm approved by the class society and the results presented in the society's required format.

What makes this sector different

The class survey regime, not a general inspection code, drives scope and timing. Thickness diminution is calculated against original scantlings, which means the as-built data is part of the inspection record and its absence is a genuine problem rather than an inconvenience.

The New Orleans asset base

New Orleans anchors the Lower Mississippi River chemical corridor, with major refineries operated by Phillips 66, Valero, and Marathon alongside LNG export terminals and a dense network of petrochemical facilities. The strategic importance of Gulf Coast energy infrastructure and its exposure to hurricane-related damage drives risk-based inspection planning, where digital twin platforms provide the geographic and condition data needed to prioritise inspection scopes after weather events. High humidity, temperature cycling, and external corrosion from the Mississippi River industrial environment are monitored in real time through 3D asset models.

How the work is controlled

Agree personnel qualification, equipment checks, procedure revision and review responsibilities for the examination. Retain those records with the results and coverage limitations.

Marine and shipbuilding NDT beyond New Orleans

This page covers marine and shipbuilding inspection in New Orleans. The sector-wide picture sits on the national pages: marine and shipbuilding NDT consulting covers programme authority — written practices, procedure approval, audit defence — in this sector's regime; and marine and shipbuilding NDT training covers the methods this sector certifies in and the career path into it.

Maritime NDT around New Orleans: inland barges, towboats and the lower Mississippi

Most maritime NDT around New Orleans is brown-water work. It covers inland tank barges, pressure barges and towboats on the Mississippi River System and the Gulf Intracoastal Waterway, plus the docks and terminals along the lower river. The core tasks are thickness gauging, weld crack detection and visual survey for Coast Guard, third-party or class surveyors. Atlantis, based in Houston, sends crews to the yard, fleet or dock.

The river as a working port. The Port of South Louisiana covers a 54-mile stretch of the Mississippi between New Orleans and Baton Rouge. It handled about 248 million short tons in 2023. Grain, soybeans and corn are major exports, and crude oil, petroleum products and chemicals make up much of the rest. The barges that serve this traffic spend time in a shipyard on a regular cycle. There, bottom and side plating is gauged, internal structure is checked for wastage, and renewed steel is examined before the hull goes back into the tow.

Pressure barges and petrochemical cargo. Part of the inland fleet carries pressurized cargoes such as liquefied petroleum gas and ethylene plant co-products, which follow petrochemical growth along the Gulf Coast. Kirby's purchase of Targa's 16 pressure barges, about 258,000 barrels of capacity, shows how specialized that segment is. The cargo tanks on these barges are welded pressure containers. Weld examination and wall-thickness history therefore matter more on them than on an open hopper barge carrying grain.

Subchapter M from the surveyor's side. Third-party organizations are approved by the Coast Guard under 46 CFR Part 139. They audit an operator's Towing Safety Management System against Part 138 and survey individual towboats under Part 137. The Coast Guard has accepted the Responsible Carrier Program of the American Waterways Operators as a TSMS option, and class societies such as ABS also act as third-party organizations. For an NDT crew, the practical point is simple: hull gauging and crack findings feed the surveyor's report. The gauging plan, report format and personnel requirements should be agreed with the surveyor before the boat is out of the water. Atlantis confirms at quotation whether its personnel are acceptable for the survey in question.

Seasons and access. Spring high water on the Mississippi and the June to November hurricane season both change yard and fleeting schedules. Work is planned with float in the dates, and rope access or staging is arranged for dock structures that cannot be reached from the bank.

Tank barges: bottom, side and internal structure gauging during yard periods
Pressure barges: cargo tank weld examination and thickness history
Towboats: hull condition evidence for Part 137 surveys and TSMS audits
River docks and terminals: dock piping, mooring structures and loading equipment
Reports in the format the third-party organization or class surveyor requires

Where to go next. Searches for maritime NDT services in general are answered on maritime NDT services. How a single written practice can satisfy both the Coast Guard and class survey cycles is covered on maritime NDT consulting in New Orleans. Statewide inspection scopes are on inspection services in Louisiana. For crews you want to train in-house, see maritime NDT training and NDT training in New Orleans. Gauging results can go out as signed reports from the ERP reports app. To scope a yard period, send the barge or towboat details and the survey basis through the New Orleans marine NDT enquiry.