Owner's Inspection
Technical surveillance and acceptance support on behalf of the owner, checking contractor work against contract requirements, approved documents and the ITP.
Owner-side assuranceOwner's Inspection · Site QA/QC · TPI Support
Industrial Insulation Inspection, QA/QC & Third-Party Inspection
ERATHERM provides owner-side inspection, construction QA/QC and project-defined TPI support for hot, cold and cryogenic insulation systems—from document review and material receiving inspection to final acceptance and quality-dossier close-out.
ITPHold & witness pointsMIR/WIRNCRPunch listFinal dossier
1,000,000+ m²Successfully completed industrial insulation
20+ YearsEngineering, design and field experience
3 ContinentsProject experience across Europe, Asia and Africa
End-to-End InsightDesign, installation, QA/QC and verification
Layer-by-layer quality assurance
Insulation Quality Cannot Be Verified at the Final Walkdown Alone
Many critical insulation defects disappear from view as soon as the next layer or metal cladding is installed. Incorrect material, insufficient thickness, aligned joints, uncontrolled blanket compression, incomplete vapour retarders, poorly formed vapour stops and unsealed support details may remain hidden until heat loss, condensation, icing, water ingress or premature deterioration becomes visible in service.
Effective inspection therefore follows the construction sequence. Documents and materials are checked before installation; the substrate is released before concealment; each critical layer is inspected at the approved hold, witness or surveillance point; and nonconformities are closed before the next stage.
Core principle: Quality must be inspected before each critical layer becomes concealed.
Engineering decisions grounded in construction
Inspection Informed by More Than 1,000,000 m² of Completed Field Work
ERATHERM's inspection approach is built on direct experience in insulation engineering, detail design, material selection, procurement, prefabrication and field application. This background allows our inspectors to evaluate not only whether a detail looks correct, but whether it is thermally appropriate, constructible, maintainable and consistent with the specified long-term performance.
Across power generation, refinery and petrochemical, mining and metallurgy, cement, MDF, marine and critical infrastructure projects, our teams have successfully completed more than 1,000,000 m² of insulation. The resulting lessons are applied to new construction, maintenance, retrofit and turnaround inspection programmes.
This integrated perspective is especially valuable at supports, nozzles, penetrations, expansion joints, removable covers, vapour-barrier terminations and cladding interfaces—areas where a specification clause must be translated into a practical field detail.
Choose the correct engagement model
Three Inspection and QA/QC Service Models
Roles, reporting lines, inspection authority and independence are defined before mobilisation so every release and record has a clear project meaning.
EPC / Contractor QA/QC Support
Preparation and administration of ITPs, inspection requests, field records, NCRs, punch items and turnover documentation within the contractor's quality system.
Project quality executionProject-Defined TPI
Third-party inspection at agreed hold and witness points where ERATHERM is not the executing insulation contractor and the required impartiality is defined by the project.
Defined independent scope
Scope boundary: When ERATHERM supplies or installs the inspected system, the service is identified as internal or contractor QA/QC—not independent TPI. Where accredited inspection-body certification is contractually required, the accreditation, inspection type and authorised scope must be separately verified before appointment.
Inspection from submittal to turnover
End-to-End Insulation Inspection Workflow
The inspection plan follows the physical sequence of the work and retains objective evidence at every critical transition.
01Document ReviewSpecification, drawings, submittals, method statement, ITP and acceptance criteria.
02Material ReceivingProduct identity, certificates, dimensions, damage, shelf life and storage.
03Pre-Insulation ReleaseSurface, coating, NDT, tracing, supports and readiness before concealment.
04In-Process InspectionLayers, joints, thickness, barriers, fixings, supports, cladding and details.
05NCR & Punch ControlNonconformity, corrective action, reinspection, evidence and close-out.
06Final AcceptanceWalkdown, records, optional performance screening and quality dossier.
Field inspection checkpoints
What Is Checked at Each Stage?
The detailed checklist is project-specific. These control groups provide a practical baseline for hot, cold and cryogenic insulation work.
Material Receiving Inspection
Materials are verified before they enter the work front, preventing unapproved or damaged products from being concealed within the completed system.
Records may include MIR, packing-list traceability, certificates, photographs and quarantine status.
- Approved Material List and submittal compliance
- Manufacturer, product, grade and batch/lot identity
- Datasheet, certificate of conformity and required test reports
- Dimensions, density or class, nominal thickness and facing
- Wet, broken, compressed or otherwise damaged material
- Sealant, adhesive, coating and mastic shelf life
- Dry, enclosed and raised storage conditions
- Quarantine and disposition of nonconforming deliveries
Pre-Insulation Release
The substrate and connected disciplines are checked before insulation hides the surface and makes later verification difficult or impossible.
Release responsibility remains governed by the approved ITP and the interface matrix between piping, coating, tracing and insulation disciplines.
- Clean, dry and accessible substrate condition
- Coating completion and approved coating release
- Required welding, pressure test and NDT completion
- Heat-tracing installation, testing and handover status
- Support rings, clips, protrusions and penetrations
- Nameplates, inspection points and removable-access requirements
- Weather conditions and work-front protection
- Approved drawings, method statement and materials available
Installation Quality Control
Material fit-up and workmanship are checked before the next layer closes the system and again before final cladding acceptance.
Acceptance tolerances, inspection frequency and required evidence are taken from the approved project documents—not from a generic checklist alone.
- Correct material and layer sequence
- Nominal and total installed thickness
- Joint fit, gap control and staggered joints
- Blanket compression and rigid-insulation fit-up
- Pin, band, wire, mesh and fastener spacing
- Expansion and contraction provisions
- Valves, flanges, nozzles, supports and penetrations
- Cladding laps, screws, sealant and water-shedding direction
Cold and Cryogenic QA/QC
Below-ambient systems require continuous control of moisture ingress, thermal bridges and dimensional movement in addition to basic thickness and workmanship checks.
A vapour-retarder layer is only as continuous as its seams, penetrations, terminations, vapour stops and repair details.
- Vapour-retarder continuity and sealed seams
- Vapour stops, terminations and compartmentalisation
- Staggered joints through multiple layers
- Penetration, nozzle and instrument sealing
- Contraction allowances and compatible sealants
- Insulated supports and load-bearing interfaces
- Weather barrier and mechanical protection
- Post-start-up condensation, icing and cold-spot screening
Inspection across real project conditions
From Detail Control to Turnaround Work Fronts
Inspection intensity and record frequency are adapted to system criticality, production rate, concealment risk and the approved ITP.
Inspection and Test Plan controls
Hold, Witness, Surveillance and Review Points
Each ITP activity identifies the acceptance criterion, inspection frequency, responsible parties, notification rule and record needed for release.
Hold Point
Work cannot proceed beyond the defined stage until the required inspection and formal release are completed.
Witness Point
The inspector is notified and given the opportunity to attend; progression follows the rules stated in the approved ITP.
Surveillance Point
Periodic or random monitoring is performed without routinely stopping the active work front.
Review Point
A document, certificate, report or inspection record is checked for completeness and compliance.
Project-specific acceptance planning
What a Practical Insulation ITP Defines
The ITP converts the specification and construction sequence into auditable inspection actions and records.
| ITP Field | Purpose | Typical Insulation Example | Resulting Record |
|---|---|---|---|
| Activity | Defines the construction or inspection stage. | Material receiving, substrate release, first layer, vapour barrier or cladding. | Inspection request / checklist |
| Inspection Characteristic | States exactly what will be verified. | Material identity, thickness, staggered joints, seal continuity or lap direction. | Measured or observed result |
| Acceptance Criterion | Identifies the requirement used for pass/fail. | Project specification clause, approved drawing, datasheet or method statement. | Accepted / rejected status |
| Frequency | Defines sample size or inspection coverage. | Every delivery, first-off detail, each work area, defined percentage or 100%. | Traceable inspection extent |
| Responsibility & Point | Allocates inspection roles and H/W/S/R status. | Contractor QC, EPC, owner, consultant or project-defined third party. | Notification and release signatures |
| Required Record | Preserves objective evidence for turnover. | MIR, WIR, field report, photo register, NCR, punch record or release note. | Quality dossier entry |
The exact point codes, signatory roles and progression rules must match the approved project quality plan and contract terminology.
Cold and cryogenic specialism
Inspection Where a Small Discontinuity Can Affect the Entire System
In cold and cryogenic service, moisture is driven toward the cold surface through every unsealed seam, penetration or damaged termination. Water vapour may condense or freeze inside the insulation, increasing heat gain and contributing to external condensation, icing, process instability or material degradation.
ERATHERM inspection plans therefore include layer staggering, vapour-retarder continuity, vapour stops, contraction details, sealed penetrations, load-bearing insulation at supports and compatible weather protection. Critical details are inspected before they become inaccessible.
Post-start-up screening can help identify cold spots or condensation, but it does not replace documented layer-by-layer inspection during construction.
After commissioning
Thermography and Performance Verification
Infrared thermography may be used after stable operation as a screening and comparative verification tool. It can help prioritise hot spots, cold spots, suspected missing insulation, thermal bridges or areas requiring closer investigation and can compare conditions before and after repair.
Results are influenced by cladding emissivity, reflected radiation, viewing angle, process load, wind, solar exposure and ambient temperature. Thermography is therefore interpreted alongside operating data, visual inspection, construction records and the limitations of the measurement method.
Important: Thermography supports post-commissioning screening and performance verification; it is not a substitute for installation-stage inspection and does not directly prove the presence or absence of hidden CUI.
Acceptance hierarchy
Project Requirements Govern Acceptance
Standards support the inspection framework, but pass/fail decisions follow the contractual and approved project documents in their defined order of precedence.
Contract RequirementsCommercial and technical obligations forming the inspection mandate.
Project SpecificationSystem-specific materials, workmanship, tolerances and acceptance clauses.
Approved Drawings and DatasheetsConfiguration, dimensions, layers, products and field details.
Manufacturer InstructionsProduct-specific storage, installation and compatibility requirements.
Approved ITP and Method StatementSequence, inspection points, frequencies, responsibilities and records.
Referenced StandardsApplicable international or project-nominated technical framework.
CINI Manual
Project-specified guidance for the design, execution and inspection quality of industrial insulation systems.
API RP 583 & AMPP SP0198
System-level corrosion-under-insulation risk management, inspection and mitigation context where contractually referenced.
ASTM C450 & ASTM C585
Dimensional coordination for fitting covers and preformed pipe-insulation systems where applicable.
ASTM C680 & ISO 12241
Thermal calculation and performance-checking references—not generic workmanship acceptance standards.
ASTM C1055 & ISO 13732-1
Evaluation framework for contact-temperature and hot-surface burn-risk considerations where required.
Traceable quality evidence
Audit-Ready Inspection Records and Quality Dossier
Deliverables are tailored to the contract, quality plan, project document-control system and required turnover structure.
Inspection and Test PlanActivities, acceptance criteria, frequencies, roles, point codes and records.
Inspection ChecklistsSystem- and stage-specific field verification forms.
Material Receiving ReportsProduct identity, certificates, condition, storage and traceability.
WIR / Inspection Request RecordsWork-front notification, inspection status and release evidence.
Field Inspection ReportsObserved condition, measurements, references and inspector findings.
Hold / Witness ReleasesFormal release records at defined construction points.
Photo RegisterTraceable evidence linked to system, location, line or equipment.
NCR Log and Close-OutNonconformity, disposition, corrective action and reinspection evidence.
Punch ListOutstanding items, responsibility, target date and closure status.
Thermographic ReportOptional screening with operating conditions, limitations and findings.
Final Acceptance ReportSummary of inspection status, open items and completion evidence.
Quality Dossier IndexStructured turnover file with as-built and supporting records.
Global project experience
Proven Engineering and Field Perspective Across Critical Industries
ERATHERM combines design understanding with construction experience to support owners, EPC contractors and operators across new-build, retrofit, maintenance and turnaround programmes.
Experience from projects involving leading international organisations:
ExxonMobil · SOCAR · STAR Refinery · RWE · OMV · Técnicas Reunidas · SAIPEM · TÜPRAŞ · Tekfen · ENKA · GE · Siemens · METKA · Cengiz Holding
ExxonMobil · SOCAR · STAR Refinery · RWE · OMV · Técnicas Reunidas · SAIPEM · TÜPRAŞ · Tekfen · ENKA · GE · Siemens · METKA · Cengiz Holding
Start with the inspection basis
Submit Your ITP and Project Documents
Share the available scope and quality documents. ERATHERM will define the engagement model, mobilisation basis, inspection coverage, reporting structure and required deliverables.
- Scope of work and contract requirements
- Project insulation specification
- Approved drawings and insulation schedule
- Material submittals and datasheets
- Draft or approved ITP
- Method statement and quality plan
- Project schedule and work-front quantities
- Required inspection model and reporting line
- Site location and mobilisation date
- Existing NCR, punch or audit records
Connected engineering services
Continue with the Right Technical Scope
Frequently asked questions
Insulation Inspection, QA/QC & TPI FAQ
What does an industrial insulation inspection service include?
The scope can include document and ITP review, material receiving inspection, pre-insulation release, installation-stage checks, hold and witness points, NCR and punch management, final walkdown, optional thermographic screening and quality-dossier close-out.
What is the difference between QA/QC and third-party inspection?
QA/QC is the quality planning, control and record system used by the party executing or managing the work. Third-party inspection is a separately appointed inspection scope with project-defined independence. When ERATHERM supplies or installs the inspected system, its inspection is identified as internal or contractor QA/QC rather than independent TPI.
Why must insulation be inspected before cladding is installed?
Cladding conceals material identity, layer arrangement, thickness, joint fit, compression, vapour-retarder continuity and many support or penetration details. Inspection before concealment preserves objective evidence and allows defects to be corrected without dismantling completed work.
What are hold and witness points in an insulation ITP?
At a hold point, work may not proceed until the required inspection and release are completed. At a witness point, the designated party is notified and given the opportunity to attend; the approved ITP defines whether work may proceed if that party does not attend.
What is checked during material receiving inspection?
Typical checks include approved product identity, grade, batch or lot, certificates, dimensions, nominal thickness, facing, physical damage, wet material, storage condition and the shelf life of coatings, mastics, sealants and adhesives.
What is different about cryogenic insulation QA/QC?
Cold and cryogenic inspection adds rigorous checks for vapour-retarder continuity, sealed penetrations, vapour stops, staggered multilayer joints, contraction allowances, load-bearing supports, weather protection and post-start-up condensation or cold spots.
Can thermography replace insulation installation inspection?
No. Thermography can screen for thermal anomalies after stable operation, but results are affected by emissivity, reflections, process load, wind and ambient conditions. It complements rather than replaces layer-by-layer installation inspection and does not directly prove hidden CUI.
Does ERATHERM issue accredited third-party inspection certificates?
Accredited inspection-body certification is not assumed by this service page. If a contract requires accreditation to ISO/IEC 17020 or another scheme, the required inspection type, accreditation body and authorised scope must be verified and agreed before appointment.
Can ERATHERM support both new construction and turnaround projects?
Yes. Inspection and QA/QC scopes can be structured for new-build installation, retrofit, maintenance, shutdown and turnaround work, with inspection frequency and reporting adapted to work-front volume, concealment risk and schedule.
Inspection evidence before acceptance
Build Quality into Every Insulation Layer
Send your project specification, ITP, drawings and schedule. ERATHERM will prepare an inspection proposal aligned with the required service model, site coverage, acceptance points and turnover records.
TPI, inspection and QA/QC scopes are project-defined. References to standards describe a potential technical framework and do not represent universal applicability, certification or accreditation. Contract requirements, approved project documents and verified inspector qualifications govern each assignment. Company names are cited only to describe ERATHERM's experience on projects involving those organisations and do not imply endorsement, current affiliation or a direct contractual relationship in every case.