Welding safety is not a single item such as wearing a helmet. A welding task can combine electrical energy, intense optical radiation, hot metal, sparks, fire, fumes, compressed gases, cylinders, grinding, noise, awkward access and nearby workers. The correct approach is to identify hazards before starting and apply the required controls for the specific worksite.
Saudi Arabia’s National Council for Occupational Safety and Health (NCOSH) publishes guidance on industrial and workshop hazards that includes welding, cutting, machinery, electrical systems and workplace controls. Site rules, permits and employer procedures remain the direct requirements for the job.
This welding safety guide is educational. Saudi Skill Test is an independent preparation resource and is not affiliated with the Saudi government, Takamol or NSDC. Foreign references such as OSHA are used only as supplementary technical material and are not presented as Saudi law.
High-risk warning: Hot work in a confined space, on tanks/containers that may have held hazardous substances, or in an atmosphere that may be flammable or oxygen-deficient requires formal controls and competent authorization. It must never be treated as a simple DIY welding task.
Welding Hazard Assessment
Before setting up equipment, ask what can harm people, equipment or the site.
A practical hazard assessment considers:
- welding process and power source;
- base material and coatings;
- filler metal or electrode;
- welding fumes and gases;
- arc radiation;
- electric shock;
- sparks and hot metal;
- combustible materials;
- compressed-gas cylinders;
- grinding and cutting;
- work at height;
- wet or conductive environments;
- ventilation;
- nearby workers and public access;
- confined or restricted spaces;
- vehicle or machinery movement;
- heat stress and outdoor conditions.
The welder should not assume that repeating a familiar weld makes the environment familiar. The same process may have very different risk in an open workshop, inside a vessel or near combustible material.
Arc Radiation
Arc welding produces intense visible light plus ultraviolet (UV) and infrared radiation. Exposure can injure eyes and burn skin. People nearby may also be exposed even if they are not welding.
Controls may include:
- welding helmet with suitable filter protection for the process;
- safety glasses or other required eye protection under the helmet;
- protective clothing that covers exposed skin;
- welding screens or curtains to protect nearby people;
- control of reflective surfaces where practical;
- restricting access to the welding area.
A welding helmet protects the welder only when it is used correctly and is in serviceable condition. Cracked lenses, damaged shells or improvised filter arrangements should not be accepted.
Burns and Hot Metal
Fresh welds, cut edges, electrode stubs, slag and nearby metal can remain hot after the visible glow disappears.
Good practice includes:
- treating recently welded material as hot until verified otherwise;
- using suitable gloves and tools for handling;
- marking or isolating hot workpieces where others could touch them;
- controlling sparks and slag direction;
- wearing clothing that reduces the chance of trapped sparks;
- keeping cuffs, pockets and openings controlled according to site PPE practice.
Never test metal temperature with a bare hand.
Electrical Hazards
Arc welding uses an electrical circuit. Shock risk can increase with damaged insulation, poor connections, wet environments, cramped conductive locations or unsafe equipment.
Before use:
- inspect welding leads and connectors;
- inspect electrode holder or torch;
- ensure the work clamp and return path are serviceable;
- keep machine covers and electrical enclosures intact;
- keep equipment dry and positioned as required by the manufacturer and site rules;
- do not make unauthorized internal repairs to energized equipment;
- isolate power before maintenance that requires isolation.
Wet or high-humidity conditions can require additional protection. The correct control should come from the site electrical-safety process rather than improvised insulating materials.
Fumes and Gases
Welding fume composition depends on process, base metal, filler, coatings and contaminants. Gases may also be generated by the arc or supplied as shielding.
Potential exposure changes with:
- material being welded;
- coating or plating;
- electrode or wire composition;
- process;
- ventilation;
- work position relative to the plume;
- enclosed or confined conditions;
- number of welders in the area.
A worker should never rely on smell as proof that air is safe.
Coated and unknown materials
Heating galvanized, painted, plated or otherwise coated metal can create additional hazardous emissions. Identify the material and coating before welding. Use the approved removal, ventilation and respiratory-protection controls where required.
Ventilation
Ventilation aims to keep airborne contaminants controlled and away from the breathing zone. Depending on the task, this may involve general ventilation, local exhaust ventilation or other engineered controls.
Local extraction is most effective when positioned to capture fume near its source without disturbing the shielding gas or creating another hazard.
Do not use oxygen to ventilate a workspace, cool a worker, blow dust from clothing or clean a work area. Oxygen enrichment can greatly increase fire risk.
A fan is not automatically an adequate control. Air movement must actually manage exposure and must not disrupt process shielding.
Fire Prevention
Welding and cutting produce ignition sources. Fire prevention starts before striking the arc.
Check for:
- combustible materials near the work;
- hidden combustibles on the opposite side of walls or floors;
- openings through which sparks can travel;
- flammable liquids, gases or dusts;
- combustible insulation or linings;
- hoses, cables and equipment exposed to sparks;
- required firefighting equipment;
- need for fire watch under the site permit system.
A welding screen protects people from radiation but does not automatically provide fire protection.
Hot-Work Controls
Many workplaces use a hot-work permit system for welding, cutting, brazing, grinding or other spark/flame-producing tasks outside designated safe areas.
A permit is not just paperwork. It should confirm that hazards have been assessed and required controls are in place.
A practical hot-work sequence is:
Before
- confirm authorization and permit requirement;
- identify combustibles and hazardous substances;
- isolate relevant energy or process sources where required;
- confirm atmosphere testing where applicable;
- establish ventilation;
- position firefighting equipment;
- confirm fire-watch requirement;
- protect nearby workers;
- inspect equipment and PPE.
During
- keep the work area controlled;
- maintain ventilation;
- watch for sparks traveling beyond the immediate area;
- monitor changing site conditions;
- stop if a new hazard appears;
- maintain required fire watch.
After
- stop equipment safely;
- close/isolate gas supplies as required;
- inspect for smoldering material or hot debris;
- continue post-work fire monitoring for the period required by the site procedure;
- remove waste and restore the area safely;
- close the permit under the authorized process.
The exact permit duration and fire-watch time are site-specific and should not be invented by a generic guide.
Cylinder Storage and Handling
Compressed-gas cylinders contain stored energy and require disciplined handling.
General safe principles include:
- identify cylinder contents from the proper label or approved identification system;
- keep cylinders secured against falling;
- protect valves from damage;
- move cylinders using the approved method and equipment;
- keep cylinders away from heat, sparks and impact as required;
- close valves when cylinders are not in use or are being moved/stored according to procedure;
- use regulators and fittings intended for the gas service;
- keep oil and grease away from oxygen-system components;
- do not lift a cylinder by its valve-protection cap;
- do not use a cylinder as a roller, support or electrical work connection.
Cylinder colors should not be treated as a universal identification method. Always verify the label and local system.
Hoses and Regulators
Gas-welding and cutting systems may include regulators, hoses, check devices and torches. Before use, inspect for:
- physical damage;
- burns or cuts;
- loose connections;
- contaminated fittings;
- damaged gauges;
- incorrect regulator for the gas service;
- signs of leakage;
- defective torch valves.
Leak checking must follow the equipment and site procedure. Never use an open flame to look for a gas leak.
If a regulator, valve or safety device appears defective, remove it from service according to procedure rather than attempting an unauthorized field repair.
Confined-Space Welding
Confined-space hot work combines multiple serious hazards. Possible dangers include:
- oxygen deficiency or enrichment;
- toxic gases and fumes;
- flammable atmosphere;
- restricted escape;
- heat stress;
- electrical hazards;
- difficult rescue;
- cylinders or hoses creating additional risk.
Confined-space work requires the site’s confined-space program, atmospheric evaluation, ventilation, permit controls, standby/rescue arrangements and other required measures.
A welder should never enter a space because “the opening is large enough” or because another worker says the air seems normal.
PPE
PPE is selected from the hazard assessment. Depending on the work, it may include:
- welding helmet;
- safety glasses/goggles;
- welding gloves;
- flame-resistant protective clothing;
- safety footwear;
- hearing protection;
- face shield for grinding where required;
- respiratory protection when specified by the exposure-control program;
- fall protection where work at height requires it.
PPE is the last layer, not the only layer. Ventilation, isolation, guarding, screens, housekeeping and work planning remain important.
| Hazard | Primary control direction | PPE examples |
|---|---|---|
| Arc radiation | screens, access control | helmet, eye protection, covered skin |
| Fume | source control, ventilation | respiratory protection if required |
| Sparks/hot metal | remove combustibles, barriers | gloves, protective clothing, footwear |
| Electric shock | sound equipment, dry/controlled conditions | task-specific electrical protection |
| Grinding | guarding and correct wheel/tool | eye/face, hearing protection |
| Noise | reduce/control exposure | hearing protection |
Post-Work Fire Check
Fires can start after welding stops because sparks may enter gaps or combustible material can smolder.
At the end of work:
- inspect the immediate weld area;
- inspect likely spark-travel paths;
- check the other side of walls, floors or partitions where relevant and accessible under the site plan;
- remove hot waste safely;
- maintain any required fire watch;
- confirm cylinders and equipment are left in a safe condition;
- report abnormal heating, smoke or damage.
Do not shorten post-work monitoring just because no flame is visible.
Emergency Actions
The first response to an emergency is to protect life without creating another casualty.
Fire
Stop work, raise the alarm, isolate energy/gas if this can be done safely and follow the site emergency plan. Use firefighting equipment only if trained and the situation is within the permitted response.
Gas leak
Stop ignition sources if safe, avoid operating equipment that could create a spark, warn others and follow the site gas-emergency process. Do not attempt an improvised cylinder-valve repair.
Electric shock
Do not touch a person who may still be energized. Isolate the electrical source using the safe method and activate emergency response.
Fume exposure
Move to a safe atmosphere if this can be done without entering a hazardous area yourself, call for medical/emergency support and report the exposure. Some welding-fume effects may not be immediately obvious.
Before / During / After Hot Work Checklist
Before
- Task and WPS understood
- Hazard assessment complete
- Permit/authorization confirmed
- Combustibles controlled
- Equipment inspected
- Gas cylinders secured and identified
- Ventilation suitable
- Screens/barriers placed
- PPE checked
- Fire-control arrangements ready
During
- Work area remains controlled
- Ventilation remains effective
- No unsafe gas/equipment condition develops
- Sparks and hot metal remain controlled
- Nearby people remain protected
- Changes in conditions trigger stop/reassessment
After
- Equipment shut down safely
- Gas valves/supplies left safe
- Hot waste controlled
- Fire check complete
- Required fire watch continues
- Area clean and barriers removed only when safe
- Permit closed under site procedure
What to Study Next
Continue with:
- W1 — Welding Processes, Machines and Consumables for safe equipment setup;
- W3 — Common Welding Defects and Visual Inspection for quality clues that may indicate unsafe setup;
- W5 — Practical Welding Work Sequence and Skill Readiness for a complete work routine;
- the Welder practice tests for original competency-oriented questions.
Key Takeaways
- Welding safety begins with hazard assessment, not PPE alone.
- Saudi NCOSH guidance should be prioritized for the local worksite context.
- Fumes depend on process, material, filler and coatings; smell is not an exposure test.
- Oxygen must not be used for ventilation or cleaning.
- Hot work requires control of combustibles, sparks, atmosphere and post-work fire risk.
- Cylinders must be identified, secured, protected and used with compatible equipment.
- Confined-space welding requires formal controls and must not be treated as routine open-shop welding.
- Stop work when conditions change or required controls are missing.
Technical References
- Saudi National Council for Occupational Safety and Health (NCOSH) — Occupational Safety and Health Industrial Hazards Guide and How to Address Them and related guidance — https://ncosh.gov.sa/en/knowledge-center/rules-regulations/administrative-systems/
- OSHA — Welding, Cutting and Brazing: Hazards and Solutions (supplemental technical reference; not Saudi law) — https://www.osha.gov/welding-cutting-brazing/hazards-solutions
- OSHA 1910.252 — General requirements for welding, cutting and brazing (supplemental) — https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.252
- OSHA 1926.350 — Gas welding and cutting (supplemental) — https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.350
- OSHA 1926.353 — Ventilation and protection in welding, cutting and heating (supplemental) — https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.353
Editorial note: Foreign safety references above are technical supplements only. Saudi law, NCOSH guidance, employer procedures and site permits govern the actual workplace.