PPE for Welding: Safety Equipment Guide

Last updated: March 2026

A journeyman welder on a pipeline fabrication job in northern Alberta starts his shift with a cracked lens in his welding helmet. He knows it is cracked. He figures he will replace it at the end of the week when the supply truck comes through. By Wednesday, he has a flash burn in his left eye and three days off work. The lens was a $12 part.

Welding injuries are almost always preventable, and they almost always come down to PPE that is missing, damaged, or wrong for the process. We work with construction contractors across Canada who run welding crews, and the gap is rarely that people do not know they need protection. It is that they do not know exactly what protection is required for their specific welding process, or they are wearing gear that is not rated for the job.

This guide covers every piece of PPE a welder needs, the CSA standards that apply in Canada, and the mistakes we see over and over on jobsites.

What PPE Does a Welder Need?

Welding personal protective equipment protects workers from five primary hazards: optical radiation (UV and infrared), flying metal and slag, fumes and gases, burns from heat and sparks, and electrical shock. Every piece of welding PPE addresses one or more of these hazards.

Here is the complete list, based on CCOHS guidance and CSA W117.2:

Notice the detail about ear protection: CCOHS specifically recommends flame-resistant earmuffs over ear plugs when sparks or spatter could enter the ear canal. A small detail that prevents a horrifying injury.

How Do You Choose the Right Welding Helmet Shade?

This is where most PPE mistakes happen in welding. The shade number on the filter lens determines how much light passes through to your eyes. Too light, and you get radiation burns. Too dark, and you cannot see the weld pool, which leads to poor welds and awkward positioning that causes other injuries.

CSA W117.2 and CSA Z94.3 provide shade number recommendations based on the welding process and amperage. Here are the common ones for construction welding:

Always use the recommended shade, not the minimum. The minimum is the bare legal threshold. The recommended shade is what actually protects your eyes comfortably over a full shift. Auto-darkening helmets are common now and can adjust shade automatically, but they still need to be set to the correct range for the process.

Why Is Flame-Resistant Clothing Non-Negotiable?

Standard cotton or polyester clothing is a fire hazard around welding. Synthetic fabrics can melt onto skin, making a burn exponentially worse. Even untreated cotton can ignite from sparks and continue burning.

FR clothing for welding must:

• Be rated as flame-resistant, not just "fire-retardant" treated cotton that loses protection after repeated washing
• Cover all exposed skin. No rolled-up sleeves, no gaps between gloves and sleeves
• Have no cuffs on pants (sparks collect in cuffs)
• Have pockets either flapped closed or taped shut (same reason)
• Be clean. Grease-soaked FR clothing can still catch fire

A leather welding jacket or apron over FR clothing provides an extra layer for heavy-duty arc welding. For tack welding or light MIG work, properly rated FR clothing alone may be sufficient. The hazard assessment determines the level of protection.

What Respiratory Protection Do Welders Need?

Most contractors think welding fumes are just a nuisance. They are wrong. Chronic exposure to welding fumes causes lung disease, neurological damage, and cancer. The International Agency for Research on Cancer (IARC) classifies welding fumes as Group 1 carcinogenic to humans.

The type of respiratory protection depends on the welding process and ventilation:

• Well-ventilated or outdoor welding: A minimum of a P100 particulate respirator (half-face). This catches metal fume particulates but not gases.
• Enclosed spaces or poor ventilation: A half-face or full-face respirator with combination cartridges (P100 + organic vapour/acid gas) or a supplied-air respirator.
• Stainless steel or galvanized metal welding: These produce hexavalent chromium or zinc oxide fumes. Minimum half-face with P100 filters; supplied-air preferred for prolonged exposure.
• Confined spaces: Supplied-air respirators (SAR) or self-contained breathing apparatus (SCBA). Half-face respirators are not sufficient.

Every respirator must be fit tested. An unfitted respirator does not protect against fumes regardless of the cartridge type. Provincial OHS codes in Alberta and BC both require fit testing, and the respiratory protection program must include written procedures for selection, use, and maintenance.

What Are the Most Common Welding PPE Mistakes?

After working with construction welding crews across Alberta and BC, here are the mistakes we see repeatedly:

• Using the wrong shade lens. A shade 10 lens for a process that needs shade 12 gives the welder a false sense of protection while UV radiation damages their eyes.
• No safety glasses under the welding helmet. The helmet protects from arc radiation. Safety glasses protect from grinding debris, chipping slag, and impacts. Both are required, always.
• Wearing ear plugs instead of earmuffs where spatter is present. A hot spark in the ear canal is exactly as painful as it sounds. Flame-resistant earmuffs prevent this.
• No respiratory protection for "just a few tack welds." Fume exposure is cumulative. There is no safe minimum. If you are striking an arc, you need respiratory protection.
• Synthetic clothing under FR gear. If a spark gets through, the synthetic layer melts onto skin. Base layers should be natural fibre (cotton, wool) or FR-rated.
• Wearing contact lenses while welding. CSA W117.2 states that contact lenses should not be worn by welders and welding personnel. Foreign bodies cause excessive irritation, and contacts provide zero protection from UV.

Every one of these mistakes results in a preventable injury. Most of them result in a WCB claim that your company pays for through increased premiums for years afterward.

For a complete overview of PPE basics, read our pillar guide: What Is PPE? Guide to Personal Protective Equipment. For construction-specific requirements, see PPE Requirements for Construction Sites in Canada. If your crew needs formal training, Safety Evolution offers a PPE training course built for construction workers.

Frequently Asked Questions