Asset Integrity Management

Industrial assets such as pipelines, storage tanks, pressure equipment, steel structures and other critical infrastructure are exposed to corrosion, mechanical degradation, environmental effects and operational stresses throughout their service life.

Asset Integrity Management (AIM) is a systematic approach used to ensure that equipment and infrastructure remain safe, reliable and fit for service throughout their operating life.

Italcorr provides Asset Integrity Management services combining corrosion engineering, cathodic protection, non-destructive testing, inspection and condition assessment to identify degradation mechanisms, evaluate technical condition and support maintenance and inspection planning.

What Is Asset Integrity Management?

Asset Integrity Management is the coordinated process of maintaining the structural and functional integrity of industrial assets while controlling technical and operational risks.

An effective AIM program integrates information from different sources, including:

• design and construction documentation;
• operating history;
• inspection results;
• corrosion monitoring;
• non-destructive testing;
• cathodic protection data;
• maintenance records;
• environmental conditions;
• failure and repair history.

The objective is not simply to detect defects, but to understand how assets degrade, where critical defects may develop and which inspection or maintenance activities should receive priority.

Assets Covered

Asset Integrity Management can be applied to a wide range of industrial equipment and infrastructure, including:

• pipelines;
• underground piping systems;
• storage tanks;
• pressure equipment;
• steel structures;
• industrial plants;
• terminals and depots;
• water and firewater systems;
• metallic foundations;
• buried structures;
• other corrosion-sensitive infrastructure.

The inspection strategy should be adapted to the specific asset, operating conditions and expected degradation mechanisms.

Corrosion Management

Corrosion is one of the principal mechanisms affecting the integrity of metallic infrastructure.

Corrosion management therefore represents an important component of Asset Integrity Management.

The process may include:

• identification of corrosion mechanisms;
• external corrosion assessment;
• internal corrosion assessment;
• corrosion rate evaluation;
• coating condition assessment;
• cathodic protection evaluation;
• corrosion monitoring;
• analysis of environmental conditions;
• identification of corrosion-critical locations.

Understanding the corrosion mechanism allows appropriate inspection and mitigation methods to be selected.

Cathodic Protection Assessment

For buried or immersed metallic structures, cathodic protection is an important element of integrity management.

Assessment may include:

• structure-to-electrolyte potential measurements;
• ON and Instant OFF potentials;
• cathodic protection current measurements;
• rectifier performance testing;
• insulating joint testing;
• electrical continuity verification;
• anode system assessment;
• stray current investigation;
• AC interference assessment.

For buried pipelines, additional techniques such as CIPS, DCVG, PCM and Pearson surveys can provide detailed information about cathodic protection performance and coating condition.

Non-Destructive Testing

Non-Destructive Testing (NDT) allows the condition of materials and components to be evaluated without damaging the inspected asset.

Depending on the equipment and inspection objectives, methods may include:

• Visual Testing (VT);
• Ultrasonic Testing (UT);
• Ultrasonic Thickness Measurement (UTM);
• Magnetic Particle Testing (MT);
• Liquid Penetrant Testing (PT);
• Eddy Current Testing (ET);
• other specialized inspection techniques.

NDT results provide important information about wall thickness, corrosion damage, surface defects, weld condition and other discontinuities.

Pipeline Integrity

Pipeline integrity management requires correlation between corrosion, coating, cathodic protection and inspection data.

For buried pipelines, an integrated assessment may combine:

CIPS – evaluation of cathodic protection potential distribution;

DCVG – detection and assessment of coating defects;

PCM – analysis of current attenuation and abnormal current losses;

Pearson Survey – detection of coating defects;

UT / Thickness Measurement – evaluation of actual metal loss.

Combining these methods can improve the identification of pipeline sections requiring excavation, direct examination or repair.

Storage Tank Integrity

Storage tanks can be affected by external and internal corrosion, particularly in areas such as tank bottoms, shell plates, roof structures and associated piping.

Integrity assessment may include:

• visual inspection;
• ultrasonic thickness measurements;
• corrosion mapping;
• evaluation of tank bottom corrosion;
• cathodic protection assessment;
• coating condition evaluation;
• inspection of accessible structural elements;
• analysis of corrosion history.

Inspection results can then be used to support maintenance and repair planning.

Inspection Data Management

A major element of Asset Integrity Management is the systematic collection and comparison of inspection data.

Individual measurements provide information about the condition of an asset at a particular moment. Historical comparison provides additional information about how quickly the condition is changing.

Data analysis may include:

• comparison of previous and current inspections;
• corrosion rate calculation;
• wall thickness trends;
• cathodic protection potential trends;
• identification of recurring defects;
• mapping of critical locations;
• evaluation of degradation progression.

This approach allows maintenance decisions to be based on actual condition trends rather than isolated inspection results.

Identification of Degradation Mechanisms

Before selecting an inspection method, it is important to understand which degradation mechanisms are likely to affect the asset.

These may include:

• general corrosion;
• localized corrosion and pitting;
• erosion-corrosion;
• galvanic corrosion;
• stray current corrosion;
• microbiologically influenced corrosion;
• coating degradation;
• mechanical damage;
• fatigue;
• cracking;
• wall thinning;
• environmental degradation.

Different degradation mechanisms require different inspection and monitoring strategies.

Condition Assessment

Condition assessment combines inspection results, operational information and engineering analysis to determine the current technical condition of an asset.

The assessment can help answer several important questions:

Where are the most significant defects?

Is degradation progressing?

Which areas require additional inspection?

Which defects require repair or monitoring?

Where should inspection resources be concentrated?

The result is a more structured approach to maintenance and integrity management.

Risk-Based Approach

Not all equipment has the same probability of degradation or the same consequences in the event of failure.

For this reason, integrity management can use a risk-based approach to prioritize inspection activities.

A simplified concept is:

Risk = Probability of Failure × Consequence of Failure

Assets or locations with higher risk can receive greater inspection priority, while lower-risk equipment may be inspected at appropriately optimized intervals.

Factors considered may include:

• corrosion activity;
• equipment condition;
• operating pressure and temperature;
• transported or stored product;
• environmental consequences;
• proximity to people or infrastructure;
• previous failures;
• inspection history.

Inspection Planning

Inspection planning should be based on expected degradation mechanisms and available condition data.

The process may include:

Asset identification → Degradation assessment → Inspection method selection → Inspection → Data analysis → Maintenance recommendations → Monitoring → Reassessment

This creates a continuous integrity management cycle rather than a series of unrelated inspections.

Remaining Life Assessment

Where sufficient inspection data are available, corrosion rates and wall thickness trends can be used to support estimation of remaining service life.

A simplified engineering approach compares:

• measured wall thickness;
• minimum allowable thickness;
• estimated corrosion rate.

Remaining life calculations should be supported by appropriate engineering criteria and reliable inspection data.

Regular reassessment is important because corrosion rates and operating conditions can change over time.

Integrated Asset Integrity Approach

A key advantage of Asset Integrity Management is the integration of multiple engineering disciplines.

Italcorr combines:

Corrosion Engineering

Cathodic Protection

Non-Destructive Testing

Pipeline Surveys

Corrosion Monitoring

Condition Assessment

Inspection Data Analysis

Instead of considering each inspection result independently, information from different methods can be correlated to obtain a more complete understanding of asset condition.

For example:

Coating defect + insufficient cathodic protection + measured metal loss = higher inspection priority

This type of correlation helps identify critical locations more effectively.

Asset Integrity Management Services by Italcorr

Italcorr provides Asset Integrity Management and integrity assessment services for pipelines, tanks, buried structures and industrial infrastructure.

Our services include:

• asset condition assessment;
• corrosion engineering;
• corrosion monitoring;
• pipeline integrity assessment;
• storage tank integrity assessment;
• cathodic protection assessment;
• CIPS Survey;
• DCVG Survey;
• PCM Survey;
• Pearson Survey;
• stray current investigation;
• AC interference assessment;
• non-destructive testing;
• ultrasonic thickness measurements;
• coating condition assessment;
• identification of degradation mechanisms;
• corrosion rate evaluation;
• inspection data analysis;
• identification of critical areas;
• inspection planning;
• maintenance recommendations;
• technical reporting.

An integrated Asset Integrity Management approach helps operators identify degradation at an early stage, prioritize inspection activities, optimize maintenance resources and extend the reliable service life of industrial assets.