WELDING QUALITY REQUIREMENTS

ISO 3834-6:2024

ISO 3834 QUALITY LEVELS

Which ISO 3834 Quality Level Does Your Welding Fabrication Company Need in India? ISO 3834-2 vs 3834-3 vs 3834-4 for Structural, Railway & Industrial Welding

By First Welding Certification Technical Editorial Team

08 Min Read

18 Sep 2026

Table Of Contents

ISO 3834 Quality Levels: Choosing the Right Welding Requirements

ISO 3834-2

Comprehensive Quality

Extensive welding quality controls for complex fabrication and demanding production requirements.

ISO 3834-3

Standard Quality

Defined welding procedures, qualified personnel, production controls and quality documentation..

ISO 3834-4

Elementary Quality

Basic welding quality requirements for applicable manufacturing and fabrication activities.

ISO 3834-6:2024

Quality Level Selection

Key implementation considerations for applying the ISO 3834 series to welding manufacturing.

iso 3834 certification

A welding fabrication company can make strong welds and still have a big question: Is the welding quality level that is being used the right one for the product the welding process, the customer’s needs and the rules that apply?

This is a problem many makers face.

Should the company use ISO 3834‑2, which has quality rules ISO 3834‑3, which has standard quality rules or ISO 3834‑4, which has basic quality rules?

The question has become more important in 2026 after ISO 3834‑6:2024 was published. That Part 6 of the series does not add a quality level or give extra rules. It simply gives advice on how to use the ISO 3834 series and pick the part. For welding companies in India that make steel structures, railway parts, industrial machines and other welded items knowing the difference can mean the difference between a welding quality system that’s just right and one that is too complicated or not complete enough. This article shows the ISO 3834 quality levels from the start explains how ISO 3834‑6:2024 fits into the system that’s already in place describes the technical factors that matter when choosing a level and shows how makers can match welding steps, staff, checks and paperwork, with the rules that apply.

What Is ISO 3834 for Welding Fabrication?

ISO 3834 is a set of standards that describe the quality requirements for joining metallic materials using fusion welding. This standard is different from a quality management standard because it focuses only on welding quality and the control of the welding process.

The requirements can include things like:

  • review of technical and contractual requirements
  • welding procedure specifications
  • welding procedure qualification
  • welding personnel qualification
  • welding coordination
  • welding consumables
  • welding equipment
  • material identification
  • traceability
  • inspection and testing
  • destructive testing when needed
  • nonconformity control
  • quality records

ISO 3834-1:2021 gives guidance on choosing the right quality requirement level from ISO 3834-2 , ISO 3834-3 and ISO 3834-4. It is used for manufacturing in workshops and also for field installation sites.
For information manufacturers can also look at EN ISO 3834 certification requirements, for welding manufacturers.

What Is ISO 3834-6:2024 and Why Does It Matter in 2026?

ISO 3834-6:2024 is the part in the ISO 3834 series. It replaced ISO/TR 3834-6:2007. Came out in February 2024. The goal of this document is to help people use the parts of ISO 3834 and choose the right part for their needs.

A key point for companies is:

ISO 3834-6:2024 does not bring any rules to ISO 3834-1 through ISO 3834-5. Because of this it should not be seen as a level for certification.

The way the parts are organized is like this:

ISO 3834-1 → Rules for picking the quality level
ISO 3834-2 → Full quality rules
ISO 3834-3 → Basic quality rules
ISO 3834-4 → Simple quality rules
ISO 3834-5 → Papers needed to show compliance
ISO 3834-6:2024 → Help, for using the whole series

This difference matters a lot when businesses change their methods and web pages in 2026.

ISO 3834-2 vs 3834-3 vs 3834-4: Which Welding Quality Level Applies?

ISO StandardQuality Requirement LevelGeneral Focus
ISO 3834-2:2021ComprehensiveMost comprehensive welding quality requirements
ISO 3834-3:2021StandardStandard welding quality requirements
ISO 3834-4:2021ElementaryElementary welding quality requirements

I think these should not simply be viewed as “high,” “medium,” and “low” quality.

There is a difference in the scope and depth of quality requirements and the controls that apply to welding activities.

ISO 3834-2: Comprehensive Welding Quality Requirements

ISO 3834-2 specifies comprehensive quality requirements for fusion welding of materials. It involves a framework, for controlling welding activities, including technical review, production planning, welding procedures, personnel, equipment, inspection, testing and quality records.

ISO 3834-3: Standard Welding Quality Requirements

ISO 3834-3 specifies standard quality requirements. It provides a level of welding quality control for applicable manufacturing activities with requirements determined by the product, application and other relevant conditions.

ISO 3834-4: Elementary Welding Quality Requirements

ISO 3834-4 specifies elementary quality requirements. Elementary does not mean “no quality control.” It represents the level defined by the ISO 3834 framework. I believe the correct selection should therefore be based on the requirements than simply choosing the highest level.

How to Choose the Right ISO 3834 Quality Level for Welding Fabrication

The important question is not: “Which ISO 3834 certificate is the best?”

It is: “Which ISO 3834 quality requirement level matches our product, application and welding requirements?”

ISO 3834‑1:2021 provides the selection framework while ISO 3834‑6:2024 provides implementation guidance.

A practical selection process starts with five areas.

1. Identify the Welded Product

Determine whether the company manufactures:

  •  structural steel components
  • railway components
  • machinery
  • welded assemblies
  • fabricated equipment
  • pressure‑related components
  • other metallic welded products

The consequences of welding failure and the technical complexity of the product can affect the applicable requirements.

2. Identify the Applicable Product Standard

The next question is: Which product or sector‑specific standards apply? For example structural steel fabrication may involve EN 1090 while railway welding may involve EN 15085.

3. Review Customer and Contract Requirements

A project specification or customer contract may specify the welding quality level. This means the certification scope should be established after the relevant contractual and technical requirements are reviewed.

4. Evaluate Welding Processes and Materials

Consider:

  • welding processes
  • parent materials
  •  material thickness
  • welding procedure requirements
  • weldability
  • welding positions
  • production volume
  • inspection requirements
  • NDT requirements
  • traceability requirements

5. Establish the ISO 3834 Level

After reviewing these factors the applicable ISO 3834 level can be established using the selection criteria in ISO 3834‑1:2021.

The practical sequence is:

Product → Application → Contract → Applicable Standard → Welding Requirements → ISO 3834 Level → Production Controls

What Technical Factors Affect ISO 3834 Quality Level Selection?

A strong ISO 3834 selection process must go beyond just comparing Part 2 Part 3 and Part 4.

Important technical considerations include:

Product safety and performance

What happens if a welded joint fails? Products with structural, operational or safety consequences may require more comprehensive controls.

Welding complexity

The number and complexity of welding processes, joint types, materials and production conditions can affect the quality requirements.

Metallurgical considerations

Material weldability, heat input, preheating, post‑weld heat treatment and susceptibility to defects can influence the welding controls.

Product and material range

A company welding a range of materials and thicknesses may require a more structured welding control system than a company performing simple repetitive welding.

Testing

The required level of inspection, testing and NDT should be considered when defining the welding quality framework.

These factors are more meaningful than selecting a quality level purely because a competitor or another manufacturer uses it.

What Are the ISO 3834 WPS, WPQR and Welder Qualification Requirements?

A welding quality system cannot operate effectively without controlling the procedures and personnel involved in welding.

Important technical documents and controls can include:

  • WPS – Welding Procedure Specification
  • WPQR – Welding Procedure Qualification Record
  • welder qualification records
  • welding coordinator competence
  • welding control
  • material certificates
  • inspection records
  • NDT records where applicable
  • equipment maintenance and calibration records
  • traceability records

 WPS and WPQR requirements can be referenced here because welding procedure qualification forms an important part of controlled welding production.

The key principle is simple:

The selected ISO 3834 level should be reflected in welding production not only in the certificate or documentation.

ISO 3834 and EN 1090: What Structural Steel Fabricators Need to Know

For steel and aluminium fabrication companies ISO 3834 requirements can be closely connected with EN 1090.

Manufacturers may need to consider:

  •  Execution Class
  • welding coordination
  • welding procedures
  • welder qualifications
  • Factory Production Control
  • material traceability
  • inspection
  • documentation

Therefore structural fabricators should not select an ISO 3834 quality level independently of their applicable EN 1090 requirements.

See First Welding Certification Pvt Ltd (PRVÁ ZVÁRAČSKÁ, a.s.) EN 1090 certification requirements for steel and aluminium manufacturers for more information.

ISO 3834 and EN 15085: Welding Quality for Railway Components

Railway welding brings another technical link.

EN 15085 applies to welding of railway vehicles and components. Covers rules about welding coordination, classification qualified staff, welding procedures and production controls. A railway welding company must look at the EN 15085 classification and project rules before setting up the welding quality framework.  Railway  welding and componenets manufacturing can follow our 15085 certification requirements and classification level.

Common ISO 3834 Quality Level Selection Mistakes

Choosing ISO 3834-2

Part 2 has many rules but the most detailed level does not automatically fit every company.

Choosing based on company size: Company size does not decide whether ISO 3834 Part 2 Part 3 or Part 4 is needed.

Looking at the welding process : The welding process is just one factor. Product rules, materials, use case, contract rules and other standards also matter.

Ignoring customer specifications : A customer may set welding quality rules that change the needed ISO 3834 scope.

Treating ISO 3834 as a documentation exercise: Real welding quality control relies on links between people, procedures, materials, equipment, production, inspection and records.

What Is the Current ISO 3834 Status in 2026?

In September 2026 the ISO 3834 series has the 2021 editions of Parts 1–5 and the published ISO 3834-6:2024. ISO’s technical committee catalogue lists ISO 3834-2:2021, ISO 3834-3:2021 and ISO 3834-4:2021 as the published editions, together with ISO 3834-5:2021 and ISO 3834-6:2024.

So manufacturers must be careful when they say “ISO 3834 edition 2026.”

There is no new ISO 3834:2026 standard that replaces the whole series.

Instead manufacturers should:

  • identify the ISO 3834 part that fits their scope;
  • verify the current edition;
  • review product and sector standards that apply;
  • review customer and contract rules;
  • set the correct quality level;
  • match welding procedures and staff;
  • keep clear production and inspection records.

This way manufacturers avoid references and keep certification documents in line with the current standard framework.

ISO 3834 Quality Level Selection Checklist for Indian Welding Fabricators

Before finalizing the ISO 3834 certification scope check:

☐ Product and use case are identified
☐ Product standards that apply are listed
☐ Customer rules are reviewed
☐ Contract rules are reviewed
☐ Welding methods are identified
☐ Base materials and thickness ranges are identified
☐ WPS requirements are set
☐ WPQR requirements are set
☐ Welder qualifications are reviewed
☐ Welding coordination rules are set
☐ Inspection rules are identified
☐ NDT rules are identified when needed
☐ Material traceability is set
☐ Quality records are defined
☐ The right ISO 3834 level is chosen
☐ Certification scope matches production

Once the level is chosen  EN ISO 3834 audit checklist can serve as a practical verification too

Frequently Asked Questions

What is the difference between ISO 3834-2 3834-3 and 3834-4?

ISO 3834-2 specifies quality requirements ISO 3834-3 specifies standard quality requirements and ISO 3834-4 specifies elementary quality requirements. ISO 3834-1 provides the criteria for selecting the level.

Conclusion

Choose the ISO 3834 Quality Level Based on Your Actual Welding Requirements

For a welding fabrication company in India choosing between ISO 3834-2 ISO 3834-3 and ISO 3834-4 should not be based simply on which level seems to be the most detailed. The correct place to start is with the technical picture:

Product → Application → Material → Welding Process → Contract → Applicable Standard → Quality Requirements → ISO 3834 Level → Production Controls

ISO 3834-1:2021 sets the criteria for choosing the right quality level while ISO 3834-6:2024 gives updated guidance on how to implement it. Parts 2 3 and 4 describe the three levels of quality requirements.

For companies looking at their welding quality system in 2026 the key step is to figure out which requirements are actually relevant to their manufacturing work and then make sure procedures, people, materials, equipment, inspection and records match.

The aim is not just to get an ISO 3834 certificate. The aim is to create a welding quality system that is controlled and fits the contract needs of the products being made.

Determine the Right ISO 3834 Quality Level for Your Welding Fabrication Scope

ISO 3834 Certification for Indian Welding Fabrication Companies. First Welding Certification Pvt Ltd, operating in India under the PZVAR brand, provides certification within its applicable scope for welding manufacturers. If your organization is evaluating ISO 3834-2 comprehensive quality requirements, ISO 3834-3 standard quality requirements or ISO 3834-4 elementary quality requirements, begin by establishing the applicable product, contractual and technical requirements.

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