International Welding Inspectors
Need an International Welding Inspector (IWI) for an industrial fabrication or manufacturing project?
Dilenza identifies IWI profiles according to the required IWI level, equipment, materials, welding processes, applicable standards, inspection responsibilities, supplier location and project schedule.
Depending on the requirement, profiles may include: IWI-B · IWI-S · IWI-C
Support can range from defined welding inspection activities to more comprehensive inspection responsibilities on complex fabrication programs.
ITP · WPS · Specification · PO · Drawings accepted
- IWI-B
- IWI-S
- IWI-C
- Project-Specific Experience
What Is an International Welding Inspector?
The International Welding Inspector (IWI) qualification is part of the International Institute of Welding's international system for welding inspection personnel.
The IIW framework defines welding inspector competence at three levels:
IWI-B
International Welding Inspector — Basic
IWI-S
International Welding Inspector — Standard
IWI-C
International Welding Inspector — Comprehensive
The appropriate level depends on the type and complexity of inspection responsibilities assigned by the project.
An IWI qualification is an important technical credential, but Dilenza also considers whether the inspector has relevant experience with the actual equipment, materials, manufacturing processes and industry involved.
Choose the IWI level for the responsibility. Choose the inspector for the fabrication.
IWI-B, IWI-S or IWI-C?
The three levels are not interchangeable.
IWI-B — Basic
The IIW describes IWI-B inspectors as having the competence to perform visual inspection of welds and to assist with other welding inspection activities.
This level may therefore be relevant to assignments involving defined visual-inspection responsibilities within an established inspection framework.
The project documentation should determine whether IWI-B provides the required level of competence.
IWI-S — Standard
IWI-S represents a broader level of welding inspection competence.
According to the IIW framework, IWI-S personnel are prepared to perform welding inspection tasks required by applicable standards or codes.
This level may therefore be relevant to projects requiring independent welding inspection across several fabrication stages.
IWI-C — Comprehensive
IWI-C is the comprehensive level within the International Welding Inspector framework.
It is intended for more demanding inspection responsibilities, including non-conventional applications involving materials, welding processes, advanced testing requirements or situations where standard inspection arrangements may not fully address the application.
At this level, competence can also extend to developing or reviewing welding inspection and quality-control plans according to the assigned project responsibilities.
For complex projects, relevant senior experience should still be reviewed alongside the qualification.
Which International Welding Inspector Do You Need?
Do not automatically request the highest IWI level.
The correct level should reflect the actual responsibilities assigned to the inspector.
Consider IWI-B when:
The requirement is focused on defined visual welding inspection activities and the project permits the Basic level.
Consider IWI-S when:
The inspector needs to perform broader welding inspection activities according to a defined standard, code or project specification.
Consider IWI-C when:
The project requires comprehensive welding inspection competence, complex technical review, advanced or unusual applications, or higher-level inspection planning responsibilities.
If the project already specifies:
- IWI-B
- IWI-S
- IWI-C
include that requirement in your request.
If the level is unclear, send the ITP and project documentation before profiles are selected.
What Can an International Welding Inspector Support?
The exact responsibilities depend on the IWI level and controlled project scope. Where applicable, welding inspection can cover activities before, during and after production welding.
Before Welding
Depending on the assigned responsibilities:
- Welding Documentation
- Materials
- Traceability
- Joint Preparation
- Fit-Up
- Welder Qualifications
- Consumables
- Preheat Requirements
During Welding
Inspection can involve:
- WPS Application
- Welder Identification
- Welding Process
- Consumables
- Preheat
- Interpass Temperature
- Welding Conditions
- Production Surveillance
After Welding
Activities can include:
- Visual Inspection
- Weld Dimensions
- Surface Condition
- NDT Status
- Repairs
- Documentation
- Acceptance Criteria
The inspector should always work according to the applicable project documentation and within the responsibilities assigned to the specific IWI level.
Welding Procedures, Qualifications & Traceability
Depending on the IWI level and agreed scope, inspection responsibilities may include technical verification of welding documentation.
WPS
Welding Procedure Specification
Verification that the appropriate project-approved welding procedure applies to the production welding activity.
PQR / WPQR
Procedure Qualification Documentation
Where included in the scope, supporting procedure qualification documentation can be reviewed against the applicable requirements.
Welder Qualifications
Welding Personnel
Inspector responsibilities may include verification that the welding personnel performing production work meet the project-defined qualification requirements.
Weld Traceability
Where required:
- Drawing
- Weld Number
- WPS
- Welder
- Material
- NDT Status
- Repair Status
The applicable documentation and inspector responsibility must always follow the controlled project requirements.
IWI Level Is Only Part of the Selection
An IWI-S inspector with extensive pressure-equipment experience may be more suitable for one project than an inspector whose background is primarily structural steel.
Similarly, an IWI-C profile for a technically complex marine project should ideally have relevant experience with marine fabrication—not simply the Comprehensive-level qualification.
Dilenza therefore considers:
- IWI Level
- Equipment
- Materials
- Welding Processes
- Industry
- Applicable Standards
- Inspection Responsibilities
- Previous Experience
For example:
Pressure Equipment
- Pressure Vessels
- Heat Exchangers
- Process Piping
- Alloy Materials
Shipbuilding
- Hull Structures
- Ship Blocks
- Marine Piping
- Heavy Fabrication
Structural Steel
- Frames
- Modules
- Platforms
- Heavy Welded Structures
Machinery
- Industrial Equipment
- Welded Assemblies
- Mechanical Fabrication
The diploma defines the qualification. Relevant experience defines the fit.
International Welding Inspectors for Industrial Projects
Pressure Equipment & Piping
- Pressure Vessels
- Heat Exchangers
- Boilers
- Tanks
- Process Piping
- Skids
IWI profiles can be matched according to relevant equipment, material and code experience.
Shipbuilding & Marine
- Vessels
- Hull Structures
- Marine Piping
- Ship Blocks
- Offshore Structures
- Marine Equipment
Relevant marine and shipbuilding experience can form an important part of inspector selection.
Structural Steel & Heavy Fabrication
- Steel Structures
- Modules
- Platforms
- Frames
- Pipe Racks
- Heavy Welded Assemblies
Inspection can support project-defined welding and fabrication requirements.
Machinery & Industrial Equipment
- Heavy Machinery
- Fabricated Assemblies
- Equipment Frames
- Mechanical Structures
Inspector matching can consider the specific manufacturing application and relevant welding experience.
Energy & Project Equipment
- Power Equipment
- Energy Structures
- Mechanical Packages
- Fabricated Systems
IWI profiles can be reviewed according to the actual equipment and welding requirements involved.
IWI Qualification and Project Standards
IWI identifies the inspector's qualification level.
It does not determine which welding standard applies to the equipment.
Depending on the project, controlled documentation may reference:
- ISO
- EN
- ASME
- AWS
- API
- Classification Requirements
- Client Specifications
- EPC Specifications
Relevant welding requirements may include, where applicable: ISO 3834 · ISO 5817 · ISO 9606 · ISO 15614 · ISO 17637 · EN 1090 · EN 15085 · ASME Section IX · AWS Requirements
The correct:
- Standard
- Edition
- Acceptance Criteria
- Quality Level
- Inspector Responsibility
must come from the controlled project documentation.
IWI, CSWIP or AWS CWI?
Several internationally recognized welding-inspector qualification schemes exist.
The correct one depends on the project requirement.
International Welding Inspector
The IIW system provides IWI-B · IWI-S · IWI-C, with different levels of welding-inspection competence.
Current qualification
CSWIP
Projects may instead specifically require CSWIP 3.1 Welding Inspector or CSWIP 3.2 Senior Welding Inspector.
AWS CWI
Other projects may specify the AWS Certified Welding Inspector credential.
These qualifications should not be treated as automatically interchangeable. The appropriate inspector credential should follow the contractual and controlled technical requirements of the project.
Review the Inspector Before Deployment
IIW diplomas and certificates are issued through IIW Authorised Nominated Bodies (ANBs) on behalf of IIW. IIW also provides a process for verifying credentials through the issuing ANB.
Where appropriate, Dilenza can submit relevant inspector information for client review before assignment confirmation.
This can include:
- IWI qualification level
- Diploma or certificate information
- CV
- Welding inspection experience
- Equipment experience
- Industry experience
- Additional qualifications
- Availability
If a specific IWI level is mandatory, state it clearly in the inspection request.
International Welding Inspectors for Global Projects
The IWI framework is designed for welding inspection personnel working within an internationally harmonized qualification system.
Dilenza can review IWI inspector requirements across major industrial and manufacturing regions worldwide.
Assignments may take place at:
- Manufacturers
- Fabrication Facilities
- Shipyards
- Equipment Suppliers
- Industrial Project Sites
Technical Requirement
- IWI Level
- Equipment
- Materials
- Standards
- Experience
Project Requirement
- Location
- Availability
- Date
- Duration
- Assignment Model
One Inspection or Longer-Term Support
One Visit
For a defined welding inspection activity, hold point, witness point or final verification.
Recurring
Repeated welding inspection during several fabrication stages.
Resident
Frequent or continuous technical presence for longer manufacturing programs.
Rotational
Structured inspector rotation for extended assignments.
Multi-Site
Inspection coordinated across several fabrication facilities or suppliers.
International Qualification. Project-Specific Matching.
Correct IWI Level
We distinguish between Basic, Standard and Comprehensive requirements.
Equipment Experience
The inspector's industrial and fabrication background forms part of profile selection.
Technical Review
Materials, welding processes, standards and assigned responsibilities can influence matching.
Profile Review
Relevant qualification information and experience can be reviewed before assignment where appropriate.
Flexible Deployment
Support can range from one inspection visit to recurring, resident or multi-site projects.
Global Reach
IWI requirements can be reviewed across major industrial manufacturing regions.
International Welding Inspector FAQ
- What is an International Welding Inspector?
- An International Welding Inspector is welding inspection personnel qualified within the International Institute of Welding's IWI framework.
- What are the IWI qualification levels?
- The IIW defines three levels: IWI-B — Basic, IWI-S — Standard and IWI-C — Comprehensive. Each represents a different level of welding-inspection competence and responsibility.
- What can an IWI-B inspector do?
- The IIW describes the Basic level as competent to perform visual inspection of welds and assist with other welding inspection activities.
- What can an IWI-S inspector do?
- The Standard level is intended for personnel capable of performing welding inspection tasks required by applicable standards or codes.
- What can an IWI-C inspector do?
- The Comprehensive level provides broader competence for complex and non-conventional inspection applications and can include higher-level inspection and quality-control planning responsibilities.
- Should we always request IWI-C?
- No. The IWI level should match the actual project responsibilities. Requesting a higher qualification than necessary can unnecessarily restrict available profiles.
- Can Dilenza provide International Welding Inspectors?
- Yes. IWI requirements can be reviewed according to the required level, equipment, project scope, supplier location, dates and suitable profile availability.
- Can an IWI inspect pressure vessels?
- Yes, where the inspector's IWI level, equipment experience and project requirements are suitable for the assignment.
- Can an IWI work in shipyards?
- Yes. For shipbuilding requirements, Dilenza can prioritize IWI profiles with relevant marine and shipyard experience.
- Can an IWI inspect structural steel?
- Yes. Profiles with relevant structural-steel and heavy-fabrication experience can be considered according to project requirements.
- Is IWI the same as IWE?
- No. International Welding Inspector (IWI) and International Welding Engineer (IWE) are different IIW qualifications with different functions and competence frameworks.
- Is IWI the same as CSWIP?
- No. They are different welding-inspection qualification systems. The required credential should follow the project requirements.
- Is IWI the same as AWS CWI?
- No. International Welding Inspector and AWS Certified Welding Inspector are different qualification or certification frameworks.
- Can we review the IWI qualification before assignment?
- Yes. Where appropriate, relevant qualification information, CVs and experience can be submitted for client technical review before deployment.
- How can an IIW credential be verified?
- IIW states that its diplomas and certificates are issued through Authorised Nominated Bodies. Credential validity can be checked through the ANB that issued the document.
Need an IWI Inspector?
Send us the project requirement.
Location
Where is the manufacturer, fabrication facility, shipyard or project site?
Equipment
What is being fabricated?
Required IWI Level
IWI-B · IWI-S · IWI-C · Not Sure
Inspection Scope
What should the inspector verify?
Materials & Welding Processes
If known.
Standards
Which project codes and specifications apply?
Date & Duration
When and for how long is support required?
Upload Documents
ITP · WPS · Specification · PO · Drawings
Not sure which IWI level applies? Send the available ITP, specification and equipment information and we can review the requirement before profiles are considered.
Need a welding or coating inspector?
Tell us what your project requires. We will review the scope and identify the most suitable inspector profile for the assignment.
Whether you require a certified welding inspector for one day, a coating inspector for a defined project stage or a resident inspector for a long-term site position, Dilenza can support your request.
International Welding Qualification. Relevant Fabrication Experience.
Dilenza matches IWI profiles according to the required level, equipment and actual project responsibilities—not the qualification title alone.