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Ultrasonic Testing (UT) Flaw detection Free Procedure

Free Download: NDT Procedure for Ultrasonic Examination of Ferritic Welded Joints | ASME Section V, AWS D1.1, B31.1 & B31.3 Document No: TNE-DOC-UT-01 Rev 01 | Trinity NDT WeldSolutions Pvt. Ltd., Bangalore

This professional, ready-to-use Ultrasonic Testing (UT) procedure for ferritic welded joints has been developed by Trinity NDT WeldSolutions Pvt. Ltd. — India’s ISO 17025 & NADCAP Accredited NDT laboratory and Centre of Excellence in Welding — and is available for free download. Designed for manual pulse-echo A-scan UT, it covers the complete examination workflow from equipment setup and calibration through scanning, defect sizing, evaluation, and reporting across a wide range of fabrication applications including pressure vessels, power piping, process piping, and structural steel.

Suitable for NDE Level II/III examiners, quality engineers, welding inspectors, and third-party inspection agencies working on new construction, in-service inspection, and repair/alteration projects.

Applicable Material & Configuration: Ferritic welded joints in plate, pipe, and structural sections across most geometric configurations encountered in industrial fabrication. Special configurations and materials require supplementary procedure qualification per ASME Section V, T-150.

Codes & Standards Referenced:

• ASME BPVC Section V — Non-Destructive Examination (primary examination standard)
• ASME BPVC Section I — Acceptance criteria for power boilers (PW-52)
• ASME BPVC Section VIII Div. 1 — Acceptance criteria for pressure vessels (Mandatory Appendix 12)
• ASME / ANSI B31.1 — Power Piping acceptance criteria (Clause 136.4.6)
• ASME / ANSI B31.3 — Process Piping acceptance criteria
• AWS D1.1 — Structural Welding Code — Steel (Tables 6.2 & 6.3, statically & cyclically loaded)
• National Board Inspection Code (NBIC-23)
• IIW — International Institute of Welding (reference block standards)

What’s Included — 7 Sections + 3 Attachments:

Scope — UT of ferritic welded joints across standard fabrication geometries; special configuration qualification requirement per T-150 | References — 8 codes and standards including ASME, AWS, NBIC and client specifications; conflict resolution clause (Code prevails over client specification) | Definitions — ASNT, ASME, DAC, NDE, IIW | Responsibilities — NDE Examiner accountable for examination and reporting per applicable code and client specification | Personnel Qualifications — Level II minimum per Trinity NDT Written Practice; subcontractor personnel qualification review by QA/QC Manager; pre-work certification verification by Level III | Procedure (Section 6) — Full technical procedure covering:

• Equipment (6.1): Pulse-echo A-scan, 1–5 MHz frequency range, screen height linearity ±5% FSH (20%–80%), amplitude control linearity ±20%, analogue instruments re-verified every 3 months / digital every 12 months, calibration check triggers on any system component change, calibration block re-check at examination completion and personnel change
• Materials (6.2): Search units 1–5 MHz, single or twin transducer; AWS D1.1 specific requirements — straight beam active area ½–1 in², angle beam 5/8–1 in. width, 45°/60°/70° beam angles at 2–2.5 MHz ±2°; IIW-V1 and IIW-V2 reference blocks; same P-Number calibration block material (P-Nos. 1, 3, 4, 5 considered equivalent); couplant (cellulose paste, liquid soap, oil, or grease); worn face search units prohibited
• Surface Condition (6.3): Minimum full skip distance each side of weld; free of spatter, grinding marks, scale, and surface noise sources
• Technical Information (6.4): Pre-examination data gathering — material type, joint configuration, welding process, PWHT status
• Examination Procedure (6.5): Curvature compensation for diameters >20 in. (flat block + gain correction) and ≤20 in. (curved block, 0.9–1.5× block diameter); 100% volume scan with 10% probe overlap; scanning rate ≤6 in./sec; transverse reflector scanning parallel to weld axis; 180° probe rotation repeat
• Calibration (6.5.5): Straight beam DAC construction at 80% FSH using calibration block holes; angle beam DAC per same method; system calibration at commencement, every 4 hours, and on completion; sweep range tolerance ±10% time base position; DAC amplitude tolerance ±20%/2 dB — decrease triggers void and re-examination of all data since last valid calibration; increase noted on report
• Inspection Technique (6.5.6): Parent metal compression wave (0°) scan minimum 75 mm each side of weld for lamination and thickness; critical root scan both sides with angle probe perpendicular to weld axis; weld body and fusion face raster scan from both sides using minimum two probes of differing angles
• Scanning (6.5.7): Datum reference marking on workpiece; base metal straight beam scan where required; angle beam scanning at ≥2× primary reference level; bi-directional scanning for parallel and transverse discontinuities; AWS D1.1 Table 6.7 scanning angles and indication rating formula: a − b − c = d
• Defect Evaluation & Sizing (6.6): All indications >20% DAC investigated for existence, location, size, and nature; defect length by 6 dB drop technique; through-thickness dimension by 20 dB technique with adjustable flaw location slide; AWS D1.1 acceptance by indication rating and length per Tables 6.2 (static) and 6.3 (cyclic); 6 dB 50% amplitude drop for indication length measurement

Acceptance Standards (6.7): ASME Section I (PW-52) · ASME Section VIII Div. 1 (Mandatory Appendix 12) · ASME B31.1 (136.4.6) · AWS D1.1 Tables 6.2 & 6.3

Reporting (6.8): Report Form TNE-UTR-03; all reflectors >50% reference level reported with size, shape, location and classification; sketches and drawings required for support

Attachments: Ultrasonic Examination Report (TNE-UTR-03) · Screen Height Linearity Record (TNE-UT-Doc-02) · Amplitude Control Linearity Record (TNE-UT-Doc-03) 

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Liquid Penetrant Testing Procedure for Welds as per ASTM E165

Free Download: NDT Procedure for Liquid Penetrant Testing (PT) of Welds | ASTM E165 / E165M-23 Document No: TNWSPL/PT/WELD/024 Rev 0 | Date: October 2025 | Trinity NDT WeldSolutions Pvt. Ltd., Bangalore

This detailed, weld-specific Liquid Penetrant Testing (PT) procedure has been prepared by Ravi Kumar Thammana, ASNT Level III (UT, MT, PT, RT, VT, ET) at Trinity NDT WeldSolutions Pvt. Ltd. — India’s NABL & NADCAP Accredited NDT Centre of Excellence. Available for free download, it is purpose-built for NDT technicians, welding inspectors, quality engineers, and fabrication shops performing surface discontinuity detection on welds across industries including oil & gas, pressure vessels, structural steel, aerospace, and power generation.

Unlike generic PT procedures, this document is written exclusively for weld inspection — addressing weld toe cleaning, HAZ coverage, weld spatter removal, crack-specific dwell times, and weld-by-weld reporting requirements in full technical detail.

Techniques & Methods Covered:

• Type I — Fluorescent Dye Penetrant (Sensitivity Levels 2, 3, 4)
• Type II — Visible / Colour Contrast Dye Penetrant
• Method A — Water-Washable
• Method B — Post-Emulsifiable, Lipophilic
• Method C — Solvent-Removable
• Method D — Post-Emulsifiable, Hydrophilic

Codes & Standards Referenced:

• ASTM E165/E165M-23 — Standard Practice for Liquid Penetrant Examination (primary standard)
• ASTM E1417/E1417M-21 — Standard Practice for Liquid Penetrant Testing
• ASTM E709-21 — Magnetic Particle Testing (for combined inspection reference)
• ASME BPVC Section V (2023) — Non-Destructive Examination
• ASNT SNT-TC-1A (2020) — Personnel Qualification & Certification
• ISO 3452-1:2021 — Penetrant Testing General Principles
• AWS D1.1 — Structural Welding Code (acceptance criteria reference)
• ASME BPVC Section VIII — Pressure Vessel acceptance criteria reference

What’s Included — 18 Sections:

Scope — PT of ferromagnetic and non-ferromagnetic weldments in steel, stainless steel, aluminium and other non-porous metals | References — 7 codes and standards | Personnel Qualification — ASNT Level II minimum, ISO 9712, Jaeger J-2 near vision + annual colour perception test | Responsibilities — Level III (procedure approval), Level II (evaluation & reporting), Level I (assisted tasks) | Materials & Equipment — Penetrant type and sensitivity selection (QPL-AMS-2644 qualified products), UV-A light source (365 nm, ≥1000 µW/cm² at 15 inches), white light (≥1000 lx), ambient light control (<20 lx for fluorescent), calibrated UV-A & white light meters, timers, thermometers, magnifying glass (2x–5x) | Calibration — Annual meter calibration, TAM panel / cracked block sensitivity verification before each use | Safety — PPE requirements, solvent ventilation, UV-A eye protection, chemical disposal per environmental regulations | Surface Preparation — Full pre-clean protocol covering 25 mm around weld, removal of slag, spatter, scale, oil, paint; grinding permitted with caveat against smearing; minimum 5-minute drying time | Penetrant Application — Temperature range 5°C–52°C, brush/spray/dip methods, weld toe and HAZ coverage requirement, dwell times: steel welds 10–20 min, aluminium welds 5–15 min, tight cracks extended dwell | Penetrant Removal — Step-by-step instructions for all four methods: Method A (water spray ≤40 psi at 45°), Method B (lipophilic emulsifier 30 sec–2 min), Method C (solvent wipe with final dry cloth), Method D (hydrophilic emulsifier 30 sec–3 min) | Developer Application — Non-aqueous wet developer preferred, spray from 8–12 inches, uniform thin layer, development time 10–60 minutes | Inspection — UV-A darkroom inspection (<2 fc ambient) with 1–2 min eye adaptation for fluorescent; white light (≥100 fc) for visible; linear vs rounded indication evaluation, measurement, false indication differentiation | Acceptance Criteria — Linear >1/16 in. (1.6 mm) rejectable; rounded >3/16 in. (4.8 mm) rejectable; 4+ rounded in 1 in.² rejectable; ASME Section VIII and AWS D1.1 cross-reference | Post-Cleaning — Full removal of developer and residual penetrant to protect against corrosion and interference with subsequent coating or welding operations | Documentation & Reporting — 12-item report content checklist, 5-year record retention, ASTM E165 Annex A2 report template reference | Quality Control — Daily TAM panel check, per-shift light intensity measurement, procedure qualification for non-standard conditions, periodic Level III audits | Limitations — Surface-breaking only, unsuitable for porous/rough surfaces, environmental sensitivity | Notes — Guidance on supplementary NDT (MT/UT), method sequencing, aluminium-specific dwell adjustment, high-sensitivity aerospace applications (Level 3/4 + E1417 qualification)

Approved & Prepared By: Ravi Kumar Thammana, ASNT Level III — Trinity NDT WeldSolutions Pvt. Ltd., Bangalore, India 

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T9

Positive Material Identification PMI testing Procedure

Free Download: NDT Procedure for Positive Material Identification (PMI) Testing | XRF & OES Methods Document No: TNWSPL/PMI/025 Rev 02 | Trinity NDT WeldSolutions Pvt. Ltd., Bangalore

This comprehensive, industry-ready Positive Material Identification (PMI) Testing procedure has been authored by Ravi Kumar Thammana, ASNT Level III (UT, MT, PT, RT, VT, ET) at Trinity NDT WeldSolutions Pvt. Ltd. — India’s NABL & NADCAP Accredited NDT laboratory. Available for free download, this procedure is suitable for quality professionals, inspection agencies, turnaround teams, and fabricators working across oil & gas, petrochemical, power generation, and structural steel sectors.

PMI Testing is a critical quality assurance activity used to verify the chemical composition and material grade of metallic components — including piping, pressure vessels, welds, raw materials, fasteners, and structural members — before they enter service.

Techniques Covered:

• XRF (X-Ray Fluorescence) — portable, fast, surface elemental analysis
• OES (Optical Emission Spectroscopy) — enhanced light element detection including carbon

Codes & Standards Referenced:

• ASTM E1476 – Optical Emission Spectrometric Analysis of Stainless Steel
• ASTM E539 / E2823 – X-Ray Fluorescence (XRF) Analysis
• ASME B31.3 – Process Piping
• ASME Section VIII – Pressure Vessels
• ASME Section IX – Welding & Brazing Qualifications
• AWS D1.1 – Structural Welding Code
• ISO 9712 / ASNT SNT-TC-1A – NDT Personnel Qualification & Certification

What’s Included in This Procedure (15 Sections + Attachment):

Scope — PMI testing of piping, vessels, welds, structural components & raw materials | References — 10 codes and standards | Definitions — PMI, XRF, OES, Heat Number, CRS, Base/Weld Metal | Personnel Qualification — ASNT Level II minimum, ISO 9712, vision requirements, training records | Equipment & Materials — Portable XRF/OES analyser, NIST-traceable certified reference standards, surface prep tools, PPE, radiation safety equipment | Safety Requirements — General site safety, radiation safety (XRF), grinding safety, chemical handling | Calibration & Daily Verification — Factory calibration (12-month interval), NIST traceability, daily 2-standard verification, acceptance criteria (±10% relative error), failed verification procedure | Test Procedure — Pre-test documentation review, sampling plan, surface preparation (grinding to bare metal, min. 0.5 mm removal), analyzer setup, grade library selection (CS / SS / Ni Alloy), reading technique, multiple readings, weld testing (3-point minimum per joint) | Sampling Requirements — Piping (per heat/line), pressure vessels, structural steel, bolting/fasteners (100% for critical), welds (base metal both sides + weld cap) | Acceptance Criteria — Grade match, elemental composition by material type (CS, LAS, SS, Ni alloys), critical elements (Cr, Ni, Mo, C, S, P), ±10% tolerance, borderline result protocol | Non-Conformance Procedure — Immediate quarantine, NCR preparation, root cause investigation, disposition (Use-As-Is / Rework / Return / Reject), CAPA | Documentation & Records — 5-year minimum retention, revision control, audit readiness | Limitations of PMI — Light element detection (C, B, N), surface-only analysis, similar-grade differentiation (304 vs 304L), temperature effects, complementary testing recommendations | Revision History — Rev 00 (Jan 2023) to Rev 02 (Oct 2024) | Approval Block — Prepared By / Reviewed By / Approved By signature fields

Attachment A — PMI Test Report Format: Fully structured report form covering: Project Information, Equipment Details, Daily Verification Check, Applicable Codes, Detailed Test Results Table (10 rows + continuation), Full Elemental Composition Table (16 elements: C, Si, Mn, P, S, Cr, Ni, Mo, Cu, V, Nb, Ti, Al, Co, W, Fe), Weld Testing Details, Non-Conformance Section, Test Summary with acceptance rate, Conclusion, Certification & Approval (Level II technician + Level III reviewer + QA/QC Manager), Distribution List.

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Ultrasonic testing Procedure as per ASME, AWS, API Codes

Free Download: NDT Procedure for Ultrasonic Testing (UT) | ASME, AWS & API Codes Document No: TNWSPL-DOC-UT-12 Rev 0 | Trinity NDT WeldSolutions Pvt. Ltd.

This detailed Ultrasonic Testing (UT) procedure for welds and piping is prepared by Trinity NDT’s ASNT/ISO 9712/NAS 410 Level III experts and is available for free download. Applicable for manual pulse-echo UT of groove welds in pressure vessels and piping with wall thickness from 8 mm to 200 mm.

Codes & Standards Covered:

• ASME BPVC Section V – Non-Destructive Examination (Article 4)
• ASME BPVC Section VIII Div. 1 & Div. 2 – Pressure Vessels
• ASME BPVC Section I – Power Boilers
• ASME B31.1 – Power Piping
• ASME B31.3 – Process Piping
• SNT-TC-1A / ANSI/ASNT CP-189 / ISO 9712 / NAS 410

What’s Included: Scope | Reference Documents | Personnel Qualification | Equipment Specifications (A-scan, 1–5 MHz) | Screen Height & Amplitude Linearity | Couplant Requirements | Calibration Blocks (DAC, V1/V2/V3) | Straight Beam & Angle Beam Calibration | Surface Preparation | Examination Techniques | Scanning Patterns & Speed | Signal Interpretation (20% DAC rule) | Acceptance Criteria (ASME Sec VIII, B31.3) | Documentation | UT Report Format (Appendix II) | Calibration Block Drawings (Figures T-434.2.1, T-434.3-1, T-434.3-2)

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Liquid Penetrant  testing Procedure as per ASME, AWS, API Codes

Free Download: NDT Procedure for Liquid Penetrant Testing (PT) | ASME, AWS & API Codes Document No: TNWSPL-DOC-PT-11 Rev 0 | Trinity NDT WeldSolutions Pvt. Ltd.

This comprehensive, ready-to-use Liquid Penetrant Testing (PT) procedure has been prepared by Trinity NDT’s ASNT/ISO 9712/NAS 410 Level III NDT experts and is available for free download. Suitable for quality engineers, NDT technicians, and inspection agencies working on pressure vessels, power piping, process piping, structural steel, and storage tanks.

Codes & Standards Covered:

• ASME BPVC Section I – Power Boilers
• ASME BPVC Section VIII Div. 1 – Pressure Vessels
• ASME B31.1 – Power Piping
• ASME B31.3 – Process Piping
• AWS D1.1 – Structural Welding Code (Steel)
• API 650 – Welded Steel Tanks for Oil Storage
• API 653 – Tank Inspection, Repair & Reconstruction
• ASTM E165 / E1417 – Standard Methods for PT

What’s Included: Scope | Reference Documents | Personnel Qualification (SNT-TC-1A, CP-189, ISO 9712, NAS 410) | Equipment & Materials | Surface Preparation | Calibration | Step-by-Step Examination Technique (Water-Washable & Solvent-Removable) | Dwell Time Table | Developer Application Methods | Viewing Conditions | Evaluation & Acceptance Criteria | Documentation Requirements | Safety & Environment | PT Report Form (Appendix VI)

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