A good weld isn't just about appearance. It's about safety, quality, procedure, and compliance.

Whether you're working on structural steel, pipelines, industrial equipment, or fabrication projects, following the right welding standards can help reduce defects, rework, equipment damage, and safety risks.

Quick Check

What type of welding work do you handle?

AWS notes that it has more than 350 welding standards, including AWS D1.1 Structural Welding Code – Steel, one of the most widely referenced welding codes. (American Welding Society)

1. Follow the Correct Welding Code

Don't start welding before you know which code applies to the job.

Different projects can require different standards.

Contractor Checklist

☐ Identify the applicable welding code
☐ Review project specifications
☐ Confirm material requirements
☐ Confirm welding process
☐ Check required weld quality
☐ Document applicable procedures

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2. Use a Qualified Welding Procedure

A professional welding operation shouldn't depend on guesswork.

Your Welding Procedure Specification (WPS) should define the important variables needed to produce the required weld.

Pro Tip: Keep the applicable WPS available to welders at the work location.

3. Make Sure Welders Are Qualified

The machine can be excellent, but the result still depends on the person operating it.

Before assigning a welder to critical work:

CHECK → QUALIFICATION → PROCESS → MATERIAL → POSITION

Don't assume that experience with one welding process automatically qualifies someone for another.

4. Inspect Materials Before Welding

Bad material preparation = bad weld.

Before striking an arc:

5. Use the Right Welding Machine

The welding machine should match the material, thickness, process, and application.

Which machine are you using?

TIG → Precision & stainless steel
MIG → Speed & production
MMA/Stick → Repairs & outdoor work
Multi-process → Multiple welding applications

Contractor Tip

Don't select a machine simply because it has a high amperage rating.

Consider:

Amperage + Duty Cycle + Welding Process + Material + Power Supply

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6. Don't Ignore PPE & Site Safety

Welding creates multiple hazards, including heat, sparks, fumes, UV radiation, electrical hazards and fire risks.

A proper welding setup should include appropriate:

OSHA's welding requirements cover welding, cutting and brazing, while its PPE standards address areas including eye/face, respiratory, head, foot, hand and electrical protection. (OSHA)

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7. Control Fire & Hot-Work Hazards

Before welding:

HOT-WORK CHECK

☐ Remove combustible materials
☐ Check the surrounding area
☐ Provide appropriate fire protection
☐ Inspect cables and connections
☐ Check gas cylinders and hoses
☐ Provide adequate ventilation
☐ Follow the site's hot-work requirements

Never treat welding as an ordinary workshop activity.

8. Inspect the Finished Weld

The weld isn't finished when the arc stops.

Depending on the project requirements, inspection may include:

Visual Inspection → Dimensional Check → NDT → Documentation

Possible non-destructive testing methods include:

• Visual Testing (VT)

• Dye Penetrant Testing (PT)

• Magnetic Particle Testing (MT)

• Ultrasonic Testing (UT)

• Radiographic Testing (RT)

ISO 3834 provides quality requirements for fusion welding of metallic materials and applies to both workshop manufacturing and field installation. (ISO)

9. Keep Welding Records

For professional contractors, documentation matters.

Keep records where required for:

• WPS

• Welder qualifications

• Material certificates

• Consumables

• Inspection results

• NDT reports

• Repairs

• Project specifications

If you can't document it, proving compliance becomes much harder.

Contractor's 30-Second Welding Checklist

Before starting the job, ask:

Choose the Right Equipment for the Job

Building a professional welding setup?

Important Note

Standards vary by project and location. AWS, ISO and local/regulatory requirements are not interchangeable, and a contractor should follow the standard specified by the project, applicable law, client, engineer, or authority having jurisdiction. OSHA's requirements, for example, are U.S. regulations and should not be presented as Nigerian law. (OSHA)

For an international-facing Tikweld article, I would therefore use AWS and ISO as technical references, while adding a short note directing Nigerian contractors to comply with applicable Nigerian regulations and project specifications.