Marine & Offshore NDT Services in Seattle 2026 — ASNT Level III Led
Atlantis NDT delivers marine & offshore ndt services in Seattle. ASNT NDT Level III-led. Seattle is a key hub for aerospace, refining & maritime 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 Seattle
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 Seattle
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, Seattle ERP, Seattle 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 Seattle asset base
Seattle is the headquarters of Boeing Commercial Airplanes (Everett 737/747/767/777/787 fabrication), Phillips 66 Ferndale Refinery (105,000 bpd), Andeavor/Marathon Anacortes Refinery (120,000 bpd), and BP Cherry Point Refinery (236,000 bpd) at the strategic Strait of Juan de Fuca corridor. Trans Mountain Pipeline's Westridge marine terminal and the Olympic Pipeline product distribution network drive PHMSA integrity-management work. The combination of Boeing's NAS 410 aerospace NDT (composites and metallics), Cascadia subduction-zone seismic risk, and the maritime corrosion environment make Seattle a uniquely diverse digital twin market.
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.
Related: ASNT Level III consulting · NDT training and certification · inspection management software · asset integrity management software. Request a quote for Seattle.
Marine and shipbuilding NDT beyond Seattle
This page covers marine and shipbuilding inspection in Seattle. 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.