Magnetic Flux Leakage Testing (MFL) Services in Japan 2026 — Atlantis NDT

Atlantis NDT delivers Magnetic Flux Leakage Testing (MFL) services in Japan. ASNT NDT Level III + API ICP-certified MFL inspectors. Serving Japan's refining, manufacturing & nuclear sectors with certified MFL inspection teams. Japanese quality standards specialists. Our Japan MFL inspectors hold JIS compliant, ASNT Level III qualifications for full regulatory compliance.

MFL Method Overview

Magnetic Flux Leakage Testing (MFL) is an advanced NDT technique. Atlantis NDT Level III approves the Procedure + signs off final disposition. Calibration block + reference standards traceable to NIST/NPL/PTB. Per ASME Section V applicable Article + ASTM E-series + ISO 17635/17636/17640. Atlantis NDT integrates MFL data into Digital Twin platform 3D defect overlay.

Code + Compliance in Japan

MFL delivery aligns with: ASME B&PV V + VIII + IX; ASME B31 piping; API 510 + 570 + 571 + 579 + 580 + 581 + 653; ASTM E-series; ISO 17635/17636/17640; NACE MR0175/MR0103; AWS D1.1/3.6; IACS Rec-20. Audit-ready records per ISO 9001 + 17020 + 17025 via Atlantis NDT ERP.

Atlantis NDT Stack Integration

MFL inspection in Japan integrates with Atlantis NDT ERP + Digital Twin platform + Reporting Software + Atlantis NDT LMS + Atlantis NDT Academy + 3D Scanning Services + Atlantis AI for NDT.

Free Consultation

Atlantis NDT publishes no pricing — varies by region + scope. Request your free 30-minute consultation. Tailored Japan MFL quote within 24 hours. Affordable, accessible, fully customizable. See also methods hub, Japan ERP, Japan training, Japan consulting.

How Magnetic Flux Leakage (MFL) works

MFL saturates a ferromagnetic wall with a magnetic field; where metal is missing, flux leaks out of the wall and is detected by sensors passing over the surface. It scans large ferrous areas quickly, which is why it dominates storage tank floor screening and in-line pipeline inspection.

What it detects

Tank floor corrosion and pitting from both the product side and the soil side, at scanning speeds no point-by-point method can match
Pipeline wall loss during in-line inspection runs, with axial and circumferential field variants suited to different defect orientations
Under-deposit and soil-side corrosion that visual examination cannot see
General wall loss across large ferrous plate areas for screening before detailed UT

What it will not do

MFL is a screening method whose sizing accuracy depends on wall thickness, coating thickness, defect geometry and scanning speed. Indications are confirmed and sized by ultrasonic prove-up. It also degrades on thick walls, on heavily coated surfaces, and on non-ferrous materials where it does not work at all.

When Magnetic Flux Leakage (MFL) is the right choice

Choose MFL to screen large ferrous areas fast — tank floors before an internal inspection scope is set, or pipeline runs where in-line inspection is available — then size with UT what MFL finds.

Codes and acceptance criteria

Examinations are performed to written procedures qualified against API 653 for aboveground storage tank inspection including floor evaluation, API 570 and ASME B31.8S for pipeline integrity assessment, ASTM E570 for flux leakage examination of ferromagnetic tubing, and POF specifications for in-line inspection performance. Acceptance criteria come from the construction or in-service code governing the item — ASME Section VIII for pressure vessels, ASME B31.3 for process piping, API 510, API 570 and API 653 in service, AWS D1.1 for structural steel — and the applicable edition is recorded against the examination so the disposition can be reconstructed later.

Japan context

Japan operates one of the world's most safety-conscious downstream and nuclear industries, with ENEOS Holdings (the merger of JX Nippon Oil & Energy and TonenGeneral) operating the Negishi, Mizushima, Kawasaki, Marifu, and Oita refineries (3.2 million bpd combined), Idemitsu Kosan at Chiba and Aichi, and Cosmo Energy at Sakai and Chiba. The Nuclear Regulation Authority (NRA), the High Pressure Gas Safety Act administered by METI, and the Boiler and Pressure Vessel Safety Regulations create one of the most rigorous compliance environments globally. The Fukushima decommissioning programme, the Kashiwazaki-Kariwa fleet, and the JX Nippon ENEOS refinery modernisation drive sustained digital twin adoption for life-extension and FFS evidence.

How the examination is controlled

Every examination carries its own evidence chain: the technician's certification for the method and level under ASNT SNT-TC-1A or ISO 9712, current on the day of inspection; the calibration status of the instrument, probes, wedges and reference blocks used, traceable under ISO 17025; and the revision of the procedure and technique sheet in force at the time. An ASNT NDT Level III reviews and signs the final disposition. That bundle is exactly what a client or accreditation audit asks for, and it is recorded as the work happens rather than assembled afterwards.

What you receive

A report in your required format, with indications located against the component and, where relevant, against a persistent corrosion monitoring location so trends stay continuous between campaigns
Raw data files in the instrument-native format plus an open export, so the dataset outlives any single supplier relationship
The procedure revision, technician certification state and instrument calibration status applicable at the time of examination
Where a finding affects continued service, a clear statement of the code clause that governs the acceptance decision