Standard Guides:Welding Piping ASME API Asset Matrix

🐘 Tusker VaultVisualSurface & Visual • CI / CIP

Coating Inspection & Protective Linings (CI / CIP)

Method Overview

AMPP / NACE / FROSIO Certified Coating Inspection covering ambient conditions, surface profile roughness, surface cleanliness, wet/dry film thickness (WFT/DFT), and pinhole/holiday porosity detection.

Core Method Specifications

Technique IDCI

AcronymCI / CIP

CategoryVisual

ModalitySurface & Visual

Standardized Report TemplateISO 17020 Ready

CI-Standard-TemplateTest in Sandbox

Target Applications & Governing Standards

3 Scopes Configured

Piping & Loops

SSPC-PA 2 ISO 19840 NACE SP0188 ASTM D7091

Target Assets / Components:

Insulated Process LinesBuried Pipeline SpoolsPipe Rack Structural Supports

Detectable Defects & Anomalies:

• Under-Film Corrosion / CUI• Low DFT Thinning• Coating Delamination / Blistering

Storage Tanks

NACE SP0188 ASTM D4417 SSPC-SP 10 ISO 8501-1

Target Assets / Components:

Internal Tank LiningsTank Floor Epoxy CoatingsExternal Shell Paint Systems

Detectable Defects & Anomalies:

• Pinholes & Holidays• Blistering & Osmotic Disbondment• Inadequate Anchor Profile

Concrete & Structural Engineering

ISO 8502-6/9 ASTM D4541 ISO 12944

Target Assets / Components:

Offshore Jacket StructuresBridge GirdersMarine Splash-Zone Piles

Detectable Defects & Anomalies:

• Salt Contamination Under Primer• Dry Spray Porosity• Adhesion Failure (Dolly Pull)

Method Limitations & Operational Boundary Conditions

Critical physics limits, thermal envelopes, blind spots, and ASME Sec V / API procedural boundaries for CI / CIP.

Level III Procedure Control

Operating Temp Envelope

Standard EnvelopeSteel temperature must be at least 3°C (5°F) above dew point per ISO 8502-4 / ASTM E337

High-Temp CapabilitySubstrate temperature must not exceed manufacturer maximum (typically 40°C / 104°F) during application to prevent solvent popping

Relative humidity must generally be < 85% to prevent condensation and premature cure inhibition.

Thickness & Dead Zone

Min ThicknessSubstrate thickness: Any structural steel plate, pipe, or sheet

Max RangeDry Film Thickness (DFT) range: 25 µm (1 mil) wash primers up to 3,000 µm (120 mils) high-build linings

Near-Surface Dead Zone

N/A (Interface testing of surface profile, adhesion, and film thickness)

Surface Condition & Couplant

Roughness & PrepAnchor profile typically 50 to 100 µm (2.0 to 4.0 mils) verified via replica tape (ASTM D4417 Method C)

Coating ToleranceEvaluates cured primer, intermediate, and topcoat layers against SSPC-PA 2 80/20 criteria and zero pinhole / holiday tolerances

Couplant / Media

None for magnetic/eddy current DFT gauges; wet sponge or conductive silicone probe for high-voltage spark testing

Geometry & Orientation

Orientation Sensitivity

Profile tape micrometer and DFT probe tip must be perpendicular (90°) to the substrate surface

Clearance:Direct hand access required for replica tape burnishing, comb gauging, and spark sweep wand

Critical Blind Spots

•Sub-film corrosion creeping underneath seemingly intact paint blisters prior to visual breaching
•Soluble non-visible chloride, sulfate, and nitrate salts trapped deep in blast pits beneath applied primer
•Microscopic holidays on intricate fastener edges, bolted flanges, and sharp structural angles

False Indication Trap:

Magnetic edge effect within 25 mm (1.0 in) of plate boundaries causing falsely high DFT readings

Recommended Cross-Validation

PECView Method

Evaluate underlying pipe wall loss through thick protective coatings and thermal insulation

ACFMView Method

Detect and size surface fatigue cracks through intact epoxy paint without stripping the coating

Level III Code Compliance Directive:AMPP / NACE CIP Level 3 mandates daily environmental logs (dry bulb, wet bulb, dew point, substrate temp) and calibrated 2-point DFT gauge verification per SSPC-PA 2.