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Open technical tools for NDT inspectors

Calculators, simulators and study material published on app.simplendt.com.br. No signup, no login. Maintained as support for the welding and NDT technical community.

ASME IX USM Go UT VT AWS A2.4

This page collects tools I built for SimpleNDT internal use and decided to keep open. Each one is anchored on an explicit normative reference — ASME Section IX, AWS A2.4, ASME Section V — and none requires signup. If you find an error or have a suggestion, write to contato@simplendt.com.br.

Open technical resources

No signup, no login

Each opens in a new tab on app.simplendt.com.br.

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ASME IX Calculator

Qualified ranges QW-452 (thickness/diameter), QW-461 (positions), QW-423/QW-424 (P-Number) — for both welder and procedure. Includes set-cover optimization via QW-424.1: given a welding plan, returns the minimum set of PQRs that covers all joints.

Open · no login
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USM Go Simulator

Independent angle UT detector simulator — navigation interface inspired by the Krautkrämer USM Go. Live A-scan, V1/V2 calibration, gain, range, reject and gate controls — with embedded test pieces. For SNT-TC-1A Level II/III practical prep. Not affiliated with Baker Hughes/Waygate; nominative trademark use only.

Open · no login
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UT Geometry

A set of three tools that work together for angle UT inspection planning: beam path computation (skip, half-skip, full-skip per angle and thickness), field ruler for angle probes, and joint template for visualizing coverage in the bevel.

Beam plotter → UT ruler → Joint template →
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Digital Bridge Cam

Bridge Cam (Cambridge gauge) in digital form — bevel angle, fillet leg, effective throat, undercut and reinforcement height. Includes guided fillet measurement exercises.

Open · no login
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Visual Testing Theory

VT exercises and theory for SNT-TC-1A Level 1 and 2 prep — weld discontinuities, visual acceptance criteria, lighting, auxiliary tools (templates, magnifiers, mirrors) and code references.

Open · no login
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Welding Symbols

Reading and constructing AWS A2.4 symbols — joint preparation, process, position, length, spacing, contour and finish. Interactive exercises to consolidate correct interpretation of arrow, reference line and tail.

Open · no login
Missing one? Found a bug? contato@simplendt.com.br · WhatsApp
FREQUENTLY ASKED QUESTIONS
Are the tools free? +
Yes — all six tools are free and open. They require no signup, login or authentication. Links open app.simplendt.com.br in a new tab and run directly in the browser.
Do they work offline? +
Yes. The app is a Progressive Web App (PWA): installing it via the Install button in Chrome or Edge keeps the tools available offline after the first load. Useful in the field, with no signal.
Which ASME edition does the calculator implement? +
ASME BPVC Section IX 2025 edition. The implemented rules — QW-452, QW-461, QW-423, QW-424 and the QW-424.1 optimization — reflect that edition. When ASME publishes a new edition (2-year cycle), formulas are reviewed and the calculator is updated.
Does the USM Go Simulator count as practice for SNT-TC-1A qualification? +
It does not replace practice with real equipment. It is useful for menu familiarity on the USM Go, calibration concepts with V1 and V2 blocks, gain/range/reject/gate exercises and theory study before Level II and III exams. Physical practice with parts and probes remains required.
Can I use the tools on client or employer projects? +
Yes, free use. We recommend verifying results against the current edition of the applicable code and citing the edition used in the final document (WPS, PQR, inspection report). The tool is technical support — it does not replace the judgment of the responsible Level 3.
Do the tools work on mobile? +
Yes, responsive layout. The ASME IX Calculator, Bridge Cam, UT ruler and joint template work well on small screens. The USM Go Simulator is best on a larger screen (tablet or desktop) due to the number of equipment controls.