Integrity Digs/NDT Services

Integrity Inspection Group provides complete integrity dig support with integrated NDT, dimensional verification, and code-compliant documentation. Our team supports pipeline operators, engineering firms, and contractors during anomaly excavations, repairs, and verifications in accordance with federal regulations, industry standards, and client specifications.

We deliver field-ready inspection personnel who understand constructability, documentation traceability, and compliance requirements for transmission and distribution assets.
 

Integrity Dig Inspection

We provide full excavation oversight and anomaly verification support including:
    •    Pre-dig documentation review (ILI reports, dig sheets, anomaly data)
    •    Anomaly location verification and field marking
    •    Depth of cover verification
    •    Excavation monitoring and pipe exposure verification
    •    Coating condition assessment
    •    Corrosion characterization (pitting, general corrosion, mechanical damage)
    •    Dent and deformation evaluation
    •    Gouge and mechanical damage documentation
    •    Weld seam identification and orientation confirmation
    •    Direct measurement and data capture for engineering evaluation
    •    Repair verification and backfill documentation
 

All data is captured in structured field reports with photo logs and dimensional records suitable for engineering disposition and regulatory traceability.

NDT Capabilities for Integrity Digs

Our NDT services are performed in accordance with applicable codes and client specifications including 49 CFR Parts 192 and 195, API standards, and ASME requirements where applicable.

Magnetic Particle Testing (MT)

Specification Basis: ASTM E709 / ASME Section V Article 7
    •    Surface crack detection at dents, gouges, weld toes, and sleeve installations
    •    Long seam and girth weld surface examination
    •    Repair verification

Ultrasonic Thickness Testing (UTT)

Specification Basis: ASTM E797 / ASME Section V Article 5
    •    Remaining wall thickness measurement
    •    Corrosion mapping
    •    Grid-based thickness surveys
    •    Verification of metal loss dimensions

Ultrasonic Shear Wave (UTSW)

Specification Basis: ASME Section V Article 4
    •    Subsurface flaw detection
    •    Crack characterization
    •    Weld integrity evaluation

Phased Array Ultrasonic Testing (PAUT) (Project Dependent)

Specification Basis: ASME Section V Article 4 Mandatory Appendix
    •    Advanced flaw characterization
    •    Complex weld geometry evaluation
    •    High-resolution weld scanning

Anomaly Evaluation Support
    •    ILI correlation and verification
    •    Metal loss sizing confirmation
    •    Dent depth measurement (OD-based percentage calculations)
    •    Mechanical damage assessment
    •    Stress riser identification
    •    Sleeve landing verification
    •    Cut-out documentation

We provide precise dimensional measurements in inches and millimeters to support engineering critical assessment (ECA) and fitness-for-service evaluations.

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Cathodic Protection & Field Measurements
    •    Pipe-to-soil potential readings
    •    Soil resistivity testing
    •    Coating holiday documentation (visual assessment)
    •    CP continuity verification

Reference Standards:
    •    NACE / AMPP SP0169 (Control of External Corrosion)
    •    Operator-specific CP procedures

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Dimensional & Digital Documentation

Creaform 3D Scanning

We utilize handheld 3D scanning technology for:
    •    Dent geometry mapping
    •    Deformation modeling
    •    Sleeve fit-up validation
    •    Digital surface replication
    •    Engineering export files (STL / dimensional datasets)

This provides high-resolution surface capture beyond traditional manual measurement methods.

Weld Mapping & As-Built Documentation
    •    Girth weld numbering and orientation
    •    Seam weld orientation verification
    •    Replacement weld mapping
    •    GPS location documentation
    •    Photo documentation packages
    •    Final dig book compilation

All documentation is delivered in structured digital format for integration into operator asset management systems.

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Governing Codes & Standards

Integrity Inspection Group performs integrity dig and NDT services in accordance with:
    •    49 CFR Part 192 – Transportation of Natural Gas by Pipeline
    •    49 CFR Part 195 – Transportation of Hazardous Liquids
    •    ASME B31.8 – Gas Transmission and Distribution Piping Systems
    •    ASME B31.4 – Liquid Transportation Systems
    •    ASME Section V – Nondestructive Examination
    •    ASTM E709 – Magnetic Particle Testing
    •    ASTM E797 – Ultrasonic Thickness Testing
    •    API 1163 – In-Line Inspection Systems Qualification
    •    NACE / AMPP SP0169 – Cathodic Protection

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​Why Integrity Inspection Group
    •    Field-experienced inspectors with transmission and distribution background
    •    Code-driven, specification-based reporting
    •    Structured documentation for audit readiness
    •    Advanced digital capture capability
    •    Responsive support for planned and emergency digs

We understand that integrity digs are high-visibility events with regulatory and engineering implications. Our objective is to deliver technically sound inspection services with defensible documentation and measurable accuracy.

For integrity dig support or NDT services, contact Integrity Inspection Group to discuss your project requirements.