Asset Reliability Services

INDUSTRIAL SERVICES RELIABILITY & INTEGRITY ARTICLE

This article describes asset reliability services as an industrial service discipline. For the management-system framework, see asset management (ISO 55000). For the inspection methods referenced throughout, see non-destructive testing.

Asset Reliability Services (ARS) is a multidisciplinary field of industrial services focused on maximizing the availability, performance, safety, and useful life of physical assets while minimizing unplanned downtime, maintenance costs, and operational risk. The discipline spans both the analytical work of predicting and preventing failure — reliability engineering, inspection, condition monitoring, and corrosion management — and the field execution work that physically protects the asset and provides safe access to it.

That field execution work is commonly grouped under the term soft craft services: the specialty trades that insulate, coat, enclose, fireproof, and provide access to industrial assets, as distinguished from the “hard” mechanical crafts such as pipefitting, welding, millwrighting, and rigging that cut into or replace the asset itself. Soft crafts — insulation, scaffolding, industrial coatings and painting, fireproofing, refractory, abatement, heat tracing, and siding and cladding — generally do not alter the pressure boundary or the mechanical function of equipment. Instead they govern the conditions in which the asset degrades: thermal performance, moisture intrusion, surface protection, fire exposure, and the physical accessibility that determines whether an inspection can be performed at all. Because those conditions drive the dominant damage mechanisms in most process facilities, soft craft execution is treated within asset reliability services as a reliability activity in its own right rather than as ancillary construction support.

Asset reliability services are commonly provided to industries that depend on large, complex, or high-value physical assets, including oil and gas, petrochemical, chemical processing, power generation, manufacturing, mining, infrastructure, and industrial facilities.

Overview

The objective of asset reliability services is to transition organizations from a predominantly reactive maintenance approach — repairing equipment after failure — to a proactive and predictive approach that identifies and addresses potential failures before they disrupt operations.

Asset reliability programs typically combine engineering, inspection, maintenance, corrosion control, data analysis, technology, and skilled field execution. The services may be performed throughout an asset’s lifecycle, from design and commissioning through operation, maintenance, refurbishment, and eventual retirement.

A comprehensive asset reliability program seeks to answer three fundamental questions:

  1. What can fail?
  2. When is it likely to fail?
  3. What can be done to prevent or mitigate the failure?

A fourth question is increasingly treated as inseparable from the first three: what physical work — insulation, coatings, access, corrosion control — has to be maintained in order for the answers to remain valid?

Core Services

Asset reliability services may include a broad range of specialized activities.

Inspection and condition assessment

Inspection services evaluate the physical condition of equipment and infrastructure. Common techniques include:

  • Visual inspection
  • Ultrasonic testing
  • Radiographic testing
  • Magnetic particle testing
  • Liquid penetrant testing
  • Remote visual inspection
  • Drone and robotic inspection
  • Thickness measurement
  • Coating and corrosion assessment

Example Companies:

  • PK Technical & Inspection
  • Mistras
  • Acuren

Predictive maintenance

Predictive maintenance uses equipment condition and operating data to identify developing failures. Technologies may include:

  • Vibration analysis
  • Infrared thermography
  • Oil and lubricant analysis
  • Motor current analysis
  • Acoustic monitoring
  • Ultrasonic monitoring
  • Continuous condition monitoring

The objective is to identify deterioration early enough that corrective action can be planned rather than responding to an unexpected failure — that is, to detect the fault far enough ahead of functional failure that the intervening interval can be used for planning, procurement, and scheduling.

Example Companies:

  • PK Technical & Inspection
  • NV5
  • G.R. Stucker & Associates, Inc. (GRSA)

Reliability engineering

Reliability engineering applies analytical and engineering methods to understand equipment failure mechanisms and improve asset performance. Common methodologies include:

  • Reliability-centered maintenance (RCM)
  • Failure Modes and Effects Analysis (FMEA)
  • Root Cause Failure Analysis (RCFA)
  • Risk-based inspection (RBI)
  • Reliability, Availability and Maintainability (RAM) analysis
  • Criticality analysis
  • Life-cycle cost analysis

Example Companies:

  • PK Technical & Inspection
  • NV5
  • G.R. Stucker & Associates, Inc. (GRSA)
  • ABS Group
  • SGS
  • Intertek

Asset integrity management

Asset integrity management focuses on ensuring that physical assets remain safe, fit for service, and capable of performing their intended function throughout their operating life. Asset integrity programs may address:

  • Corrosion
  • Erosion
  • Mechanical degradation
  • Structural deterioration
  • Pressure equipment integrity
  • Piping systems
  • Storage tanks
  • Protective coatings
  • Structural steel
  • Electrical and instrumentation systems

Example Companies:

  • PK Technical & Inspection
  • NV5
  • G.R. Stucker & Associates, Inc. (GRSA)
  • ABS Group
  • SGS
  • Intertek

Maintenance optimization

Reliability service providers may evaluate existing maintenance programs to determine whether maintenance activities are appropriately timed and targeted. The goal is generally to perform the right maintenance on the right asset at the right time.

This can include optimization of preventive-maintenance intervals, spare-parts strategies, inspection frequencies, work processes, and maintenance resources.

Example Companies:

  • PK Technical & Inspection
  • Intertek
  • DNV
  • Allied Reliability
  • Jacobs

Corrosion Management

Corrosion management is the systematic control of material degradation across an asset’s life, and in most process industries it is the single largest driver of inspection scope, maintenance spend, and loss-of-containment risk. Within asset reliability services it is treated as a program rather than a task: a defined set of responsibilities, monitoring locations, mitigation measures, and acceptance limits that together keep degradation rates predictable and within the tolerance assumed by the equipment’s design.

Damage mechanism review

A corrosion management program normally begins by identifying which degradation mechanisms are credible for each system, given its materials of construction, process fluids, temperatures, and operating history. The output is often documented in a corrosion control document (CCD) that divides the facility into corrosion loops — groups of equipment sharing common materials, process conditions, and expected damage — and states the anticipated mechanism, rate, and inspection strategy for each.

REPRESENTATIVE DAMAGE MECHANISMS AND DETECTION METHODS
MECHANISM TYPICAL LOCATION COMMON DETECTION
Corrosion under insulationInsulated carbon steel in the wet-temperature rangeInsulation removal, profile radiography, pulsed eddy current
Internal general thinningPiping and vessel walls at condition monitoring locationsUltrasonic thickness, permanently installed sensors
Chloride stress corrosion crackingAustenitic stainless steelPenetrant testing, eddy current, phased-array ultrasonics
Erosion and erosion-corrosion Elbows, tees, downstream of control valves Ultrasonic scanning, radiographic profile
Soil-side corrosionAboveground storage tank bottoms Magnetic flux leakage floor scanning, CP survey
Vibration-induced fatigueSmall-bore connections, vibrating linesMagnetic particle testing, vibration monitoring
Atmospheric corrosionExternal surfaces, structural steel, pipe supportsVisual survey, coating condition assessment

Monitoring and measurement

Corrosion is quantified so that it can be trended and projected. Programs typically combine fixed-point thickness measurement at condition monitoring locations (CMLs) with intrusive and non-intrusive monitoring devices, including weight-loss coupons, electrical resistance and linear polarization resistance probes, hydrogen flux monitors, and permanently installed ultrasonic sensors that report continuously. Process-side indicators — pH, chloride and iron counts, inhibitor residuals, water draw — are trended alongside wall-loss data, since a change in the process usually precedes a change in the metal.

corrosion rate = ( tprevious ? tactual ) ÷ elapsed years
remaining life = ( tactual ? trequired ) ÷ corrosion rate

Wall thickness in inches or millimetres; corrosion rate conventionally expressed in mils per year (mpy) or millimetres per year. Remaining life drives the next inspection interval.

Mitigation and control

Mitigation measures are selected against the identified mechanisms rather than applied uniformly. Common elements include materials selection and upgrading, chemical treatment with corrosion inhibitors, biocides and neutralizers, protective coatings and linings, cathodic protection for buried and immersed surfaces, insulation and jacketing design that sheds water, and integrity operating windows (IOWs) — explicit process limits that, if exceeded, are known to accelerate a specific mechanism and therefore trigger review.

Monitoring and Corrosion under insulation

Corrosion under insulation is treated as a distinct sub-discipline because it is concealed by design: the damage occurs on an external surface that is hidden beneath insulation and jacketing, often with no outward indication until leakage. Programs typically prioritize susceptible systems by temperature range, insulation type, jacketing condition, and history of water ingress, then use screening techniques, targeted insulation removal at high-risk points, and coordinated re-insulation to a specification intended to keep water out. Because the mitigation is executed by insulation and coatings crews, CUI programs are the clearest example of soft craft work performed to a reliability specification.
Corrosion management is where the analytical and the physical sides of asset reliability meet: the engineering defines the rate that is acceptable, and the field crafts determine whether that rate is actually achieved.

Example Companies:

  • PK Technical & Inspection
  • Oceaneering
  • ABS Group
  • Rosen

Soft Craft Services

Soft craft services — sometimes called specialty craft or support craft services — are the industrial field trades concerned with protecting, enclosing, insulating, and providing access to physical assets, rather than with modifying the assets themselves. The distinction is functional rather than a matter of difficulty or skill: hard crafts change the asset (cutting, welding, replacing, aligning, wiring), while soft crafts change the environment at the surface of the asset and the conditions under which people can reach it.

In a reliability context, soft crafts are significant for three reasons. First, they control the dominant external degradation mechanisms — moisture, atmospheric exposure, thermal cycling, and fire — which in many facilities account for a large share of unplanned repairs. Second, they determine inspectability: a condition monitoring location that cannot be safely reached is not inspected, and an insulation system that cannot be removed and restored economically tends to defer inspection indefinitely. Third, they carry a large share of turnaround labor hours and schedule, so the quality and sequencing of soft craft work directly affects both outage duration and post-startup reliability.

TRADES COMMONLY GROUPED AS SOFT CRAFT

  • Insulation — thermal and acoustic insulation, removable blankets, personnel protection, jacketing and weather barriers, and vapor-barrier systems on cold service.
  • Scaffolding — engineered access for inspection, maintenance and turnaround work, including shrink-wrap containment, dance floors, and access planning that governs whether other crafts can work at all.
  • Industrial coatings and painting — surface preparation, primers and protective coating systems, tank and vessel linings, and maintenance painting programs tied to coating condition assessments.
  • Fireproofing — cementitious, intumescent and mat-type passive fire protection applied to structural steel, vessel skirts, pipe racks and supports.
  • Refractory — installation and repair of castable, brick and ceramic-fiber linings in furnaces, heaters, boilers, reactors and flue systems.
  • Abatement — controlled removal and disposal of asbestos, lead-bearing coatings, silica and other regulated materials, frequently a prerequisite to insulation and coatings work on older assets.
  • Heat tracing — electric and steam tracing systems that maintain process temperature and freeze protection, together with their controls and insulation systems.
  • Siding and cladding — metal siding, roofing, wall panels and building envelope work on process structures and enclosures.


Where these trades are managed as part of an asset reliability program rather than procured as unrelated construction services, the work is typically specified against the same damage mechanisms identified in the corrosion control document, sequenced around inspection scope, and recorded in the same asset management system — so that, for example, the insulation removed for a thickness reading is restored to a CUI-resistant specification and captured against that asset’s history.

Example Companies:

  • PK Industrial
  • Brand
  • Brock Industrial

Technologies

Modern asset reliability services increasingly incorporate digital technologies. These may include:

  • Industrial Internet of Things (IIoT) sensors
  • Wireless condition monitoring
  • Cloud-based asset management platforms
  • Artificial intelligence and machine learning
  • Digital twins
  • Automated inspection systems
  • Robotics
  • Drones and unmanned aerial vehicles
  • Computerized maintenance management systems (CMMS)
  • Enterprise asset management (EAM) systems
  • Data analytics
These technologies can allow asset owners to collect and analyze large amounts of operational and condition data, enabling earlier identification of potential equipment failures. Their value depends on the quality of the underlying asset register, the consistency of measurement locations, and the discipline with which field results are recorded.

Reliability vs. Integrity

Although the terms are sometimes used interchangeably, asset reliability and asset integrity generally address different aspects of asset performance.

Asset integrity primarily concerns whether an asset remains physically sound, safe, and fit for service. Asset reliability focuses more broadly on whether the asset consistently performs its intended function when required.

The two disciplines are closely related. An asset with poor physical integrity may have poor reliability, while an asset can also experience reliability problems caused by operating conditions, maintenance practices, design limitations, controls, or other factors unrelated to physical deterioration.

Business Objectives

Organizations use asset reliability services to achieve several operational and financial objectives, including:

  • Reducing unplanned equipment failures
  • Increasing equipment availability
  • Extending asset life
    Improving worker and process safety
  • Reducing maintenance costs
  • Increasing production reliability
  • Improving maintenance planning
  • Reducing emergency repairs
  • Optimizing inspection programs
  • Improving capital planning
  • Reducing environmental and operational risk
The economic value of reliability services is often measured by their ability to reduce total cost of ownership while improving production and operational performance.

Lifecycle Approach

Asset reliability is increasingly viewed as a lifecycle discipline rather than an activity limited to maintenance. 
DESIGN ? CONSTRUCTION ? COMMISSIONING ? OPERATION ? INSPECTION ?
MAINTENANCE ? RELIABILITY IMPROVEMENT ? LIFE EXTENSION ? RETIREMENT
Reliability considerations incorporated during design and construction can significantly influence the future cost and performance of an asset — insulation and coating specifications, material selection, and the provision of permanent access are all made once at design and paid for repeatedly thereafter. During operations, inspection and condition-monitoring data can be used to continuously refine maintenance and reliability strategies.

Industry Applications

Asset reliability services are particularly important in industries where equipment failure can result in significant financial, safety, or environmental consequences. Examples include:

  • Oil and gas — pipelines, refineries, terminals, offshore platforms and production facilities
  • Petrochemical and chemical — process equipment, reactors, vessels, piping and storage systems
  • Power generation — turbines, boilers, generators, transformers and balance-of-plant equipment
  • Manufacturing — production machinery, robotics, motors, pumps and material-handling systems
  • Mining — mobile equipment, conveyors, crushers, mills and processing equipment
  • Infrastructure — bridges, tanks, structures, transportation systems and other long-life assets

Evolution of the Industry

Traditional industrial maintenance was largely reactive, with equipment repaired after failure. As the cost and consequences of unplanned downtime increased, organizations increasingly adopted preventive maintenance programs based on scheduled inspections and maintenance intervals.

Advances in sensors, computing, inspection technology, data analytics, and artificial intelligence have accelerated the transition toward predictive and condition-based maintenance. A parallel consolidation has taken place in the service market itself: inspection, reliability engineering, corrosion management, and soft craft execution, once contracted separately, are increasingly delivered under integrated programs on the argument that the analysis and the field work are difficult to optimize independently.

Modern asset reliability programs therefore increasingly combine field inspection and engineering expertise with digital data and analytics, and with the craft execution that acts on their findings.

See Also

  • Asset management
  • Asset integrity
  • management
  • Predictive maintenance
  • Preventive maintenance
  • Reliability engineering
  • Reliability-centered maintenance
  • Risk-based inspection
  • Condition monitoring
  • Non-destructive testing
  • Corrosion management
  • Corrosion under insulation
  • Cathodic protection
  • Protective coatings
  • Passive fire protection
  • Industrial insulation
  • Scaffolding
  • Refractory
  • Industrial inspection

A corrosion management program normally begins by identifying which degradation mechanisms are credible for each system, given its materials of construction, process fluids, temperatures, and operating history. The output is often documented in a corrosion control document (CCD) that divides the facility into corrosion loops — groups of equipment sharing common materials, process conditions, and expected damage — and states the anticipated mechanism, rate, and inspection strategy for each.

REFERENCE ARTICLE · ASSET RELIABILITY SERVICES · LAST REVISED SEPTEMBER 2026

Hard Craft / Soft Craft
Hard crafts change the asset — pipefitting, welding, millwright work, rigging, electrical. Soft crafts change the conditions around it — insulation, scaffolding, coatings, fireproofing, refractory, abatement, heat tracing, cladding.
WHY CORROSION DOMINATES
External and internal corrosion set most inspection scope in process facilities, and the mitigation for both is applied by soft craft crews: coatings on the surface, insulation and jacketing over it, and access to reach either one.
WHY CORROSION CONDITION MONITORING LOCATION
A CML is a designated, repeatable point on a pipe or vessel where wall thickness is measured over time. Trending the same point is what converts a measurement into a corrosion rate.