QA/QC Welding & NDT Inspection Services
We support clients in oil & gas, power generation, mining, construction, manufacturing, ports and industrial maintenance by helping ensure weld quality, structural integrity, compliance and safe operation of welded assets.
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Welding Quality Assurance, Quality Control and Non-Destructive Testing for Critical Industrial Assets
TechInspecta Integrity Services, Lda. provides QA/QC Welding and Non-Destructive Testing inspection services for industrial projects where weld quality, structural integrity, safety and compliance are critical.
Our services support clients during fabrication, construction, installation, commissioning, maintenance, shutdowns and asset integrity inspections. We help ensure that welded joints, pressure equipment, piping systems, tanks, structures and mechanical components are inspected according to project specifications, approved procedures and applicable international standards.
TechInspecta supports industries such as oil & gas, power generation, mining, construction, manufacturing, ports, petrochemical plants, fuel terminals and offshore/onshore facilities.
Service Overview
Welding defects can compromise the safety, reliability and performance of critical assets. Poor welding quality may lead to leaks, cracks, structural failure, equipment breakdown, production losses, fire hazards, environmental incidents and costly rework.
Our QA/QC Welding & NDT Inspection Services are designed to detect defects early, verify compliance, control welding quality and provide reliable inspection evidence before assets are placed into service.
TechInspecta combines practical field inspection, welding quality control and NDT techniques to support safe and compliant project execution.
QA/QC Welding Inspection Services
TechInspecta provides welding inspection support before, during and after welding activities.
1. Pre-Welding Inspection
Before welding begins, our inspectors verify that all requirements are in place to perform the work correctly.
This may include:
- Review of drawings and project specifications.
- Verification of approved Welding Procedure Specifications.
- Verification of welder qualifications.
- Material identification and traceability.
- Base metal condition check.
- Joint preparation inspection.
- Fit-up and alignment inspection.
- Bevel angle and root gap verification.
- Welding consumable control.
- Preheat requirement verification.
- Environmental condition assessment.
Client value: prevents welding problems before they occur and reduces the risk of rework, rejection and schedule delays.
2. In-Process Welding Inspection
During welding, TechInspecta monitors the process to ensure that welding is performed according to approved procedures and project requirements.
This may include:
- Monitoring welding parameters.
- Checking welding technique.
- Verification of preheat and interpass temperature.
- Control of welding consumables.
- Visual monitoring of weld passes.
- Verification of cleaning between passes.
- Checking distortion control.
- Monitoring repair welding.
- Recording welding progress and inspection findings.
Client value: ensures that welding quality is controlled during execution, not only after completion.
3. Post-Welding Inspection
After welding is completed, the welds are inspected to identify surface defects, dimensional issues and compliance with acceptance criteria.
This may include:
- Visual inspection of completed welds.
- Weld profile assessment.
- Weld size verification.
- Undercut inspection.
- Porosity detection.
- Crack identification.
- Spatter and arc strike inspection.
- Dimensional inspection.
- Final weld acceptance verification.
- Identification of welds requiring NDT.
Client value: confirms that completed welds meet quality, safety and specification requirements before final acceptance.
Our Non-Destructive Testing Methods
TechInspecta provides a comprehensive range of Non-Destructive Testing methods tailored to the specific requirements, materials and operating conditions of each project.
Non-Destructive Testing allows welds, components and materials to be inspected without damaging the asset. NDT is essential for detecting surface and internal defects that may not be visible during normal visual inspection.
TechInspecta can support the following NDT methods:
Visual Testing - is the first and most important inspection method used to evaluate weld appearance, surface condition, geometry and visible discontinuities.
It can identify:
- Cracks.
- Undercut.
- Porosity.
- Lack of fusion indications.
- Incomplete weld profile.
- Excessive reinforcement.
- Misalignment.
- Arc strikes.
- Surface damage.
- Poor workmanship.
Visual inspection is commonly performed before, during and after welding.
Radiographic Testing (RT)
Radiographic Testing (RT) - is a Non-Destructive Testing method used to inspect the internal condition of welds, castings, pressure vessels, pipelines and other industrial components without damaging them. It uses X-rays or gamma rays to produce an image of the internal structure of the material, allowing inspectors to identify hidden defects that may not be visible on the surface.
RT is commonly used to detect internal flaws such as porosity, cracks, lack of fusion, slag inclusions, incomplete penetration and material discontinuities. This method is highly valuable in critical industries such as oil & gas, mining, construction and manufacturing, where weld quality, pressure containment and asset integrity are essential.
Ultrasonic Testing (UT)
Ultrasonic Testing (UT) - uses high-frequency sound waves to detect internal defects, measure thickness and assess the integrity of welds, pipelines, pressure vessels and industrial equipment without causing damage.
UT is commonly used to detect cracks, corrosion, lack of fusion, laminations, thickness loss and internal discontinuities in assets such as pipelines, pressure vessels, storage tanks, welded structures and mechanical components.
It helps clients identify:
- Wall thinning.
- Corrosion loss.
- Erosion damage.
- Localized metal loss.
- Remaining service life concerns.
Magnetic Particle Testing (MT)
Magnetic Particle Testing (MT) is a Non-Destructive Testing method used to detect surface and near-surface defects in ferromagnetic materials such as carbon steel and other magnetic metals. The method works by magnetising the component and applying fine magnetic particles to the surface. If cracks or discontinuities are present, the particles gather around the defect, making it visible for inspection.
MT is commonly used to inspect welds, lifting components, pressure equipment, structural steel, shafts, hooks, bolts and other critical industrial parts. It helps identify defects such as surface cracks, laps, seams, lack of fusion and fatigue-related discontinuities, supporting safer and more reliable operations.
Dye Penetrant Inspection (DPI)
Dye Penetrant Inspection (DPI), also known as Penetrant Testing (PT), is a Non-Destructive Testing method used to detect surface-breaking defects in non-porous materials such as metals, stainless steel, aluminium, welds and machined components.
The process involves applying a visible or fluorescent dye to the surface of the component. The dye penetrates any open cracks or discontinuities, and after cleaning, a developer is applied to draw the dye back to the surface, making defects clearly visible.
DPI is commonly used to identify surface cracks, porosity, leaks, lack of fusion, fatigue cracks and welding discontinuities. It is a simple, effective and widely used method for verifying the surface integrity of industrial components without causing damage.
Assets Covered
TechInspecta’s QA/QC Welding & NDT Inspection Services can be applied to:
- Pressure vessels.
- Process piping.
- Storage tanks.
- Pipelines.
- Steel structures.
- Pipe racks.
- Offshore structures.
- Skids and modules.
- Heat exchangers.
- Boilers.
- Fuel terminals.
- Power plant components.
- Mining plant structures.
- Crane and lifting equipment components.
- Mechanical equipment frames.
- Fabricated steel assemblies.
- Welded supports and brackets.
Welding Quality Control Documentation
TechInspecta can support the review and verification of essential welding quality documents, including:
- Welding Procedure Specifications.
- Procedure Qualification Records.
- Welder Qualification Records.
- Inspection and Test Plans.
- Material certificates.
- Welding consumable certificates.
- NDT reports.
- Heat treatment records.
- Weld maps.
- Traceability records.
- Repair records.
- Punch lists.
- Final inspection dossiers.
This documentation helps clients demonstrate control, traceability and compliance throughout the project.
Common Welding Defects Identified
Our inspection services help detect and control welding defects such as:
- Cracks.
- Porosity.
- Undercut.
- Lack of fusion.
- Lack of penetration.
- Slag inclusion.
- Excessive reinforcement.
- Burn-through.
- Overlap.
- Arc strikes.
- Misalignment.
- Distortion.
- Poor weld profile.
- Incomplete root penetration.
- Excessive spatter.
- Lamination in base material.
Early detection of these defects helps reduce rework costs and prevents unsafe assets from entering service.
Every inspection delivered to internationally recognised frameworks.
All TechInspecta inspections are conducted in full compliance with the standards mandated by the world’s leading regulatory bodies and industry authorities:
API-Certified Inspection Expertise for Pressure Vessels, Piping, Tanks and Mechanical Integrity: API 510, API 570, API 650, API 571, API 577 & API 580 Certified Inspectors.
Our inspection services are supported by highly qualified professionals with internationally recognised competencies in coating inspection, welding inspection, quality control and asset integrity. Through NACE/AMPP, BGAS and CSWIP-certified inspectors, we help clients ensure that industrial assets are inspected with technical accuracy, compliance focus and a strong commitment to safety, reliability and long-term performance.
Our lifting equipment inspection services are guided by recognised industry practices, including LEEA guidance, LOLER principles and applicable BS/EN standards. This helps ensure that lifting gear and lifting equipment are inspected with a strong focus on safety, compliance, technical accuracy and fitness for purpose in demanding industrial environments.
Our inspection services are supported by qualified professionals with internationally recognised competencies in welding inspection, non-destructive testing, quality control and industrial asset integrity. Through CSWIP, SAIW and BINDT-certified expertise, we help clients ensure that critical equipment, welded structures, piping systems and industrial components are inspected with technical accuracy, safety focus and compliance with recognised industry standards.
Our Non-Destructive Testing services are delivered by qualified NDT technicians certified in accordance with SNT-TC-1A and ISO 9712 requirements, ensuring reliable inspection results, technical accuracy and compliance with recognised international practices.
