Joining processes — Safe practice

Jurisdiction for this module: Republic of Ireland (Ireland).

Module: Safe practice Parent learning area: Joining processes Target group: vocational learners in blacksmithing, artistic metalwork and metal fabrication Language: English Review date for authority checks: 1 September 2026 Licence for this aiMOOC text: Creative Commons Attribution-ShareAlike 4.0 Expert-review status: ready for review by a competent Irish metal-fabrication educator and workplace safety specialist before local delivery

All legal, occupational-safety, vocational-training and national-standards references in this course are Irish unless another country is explicitly labelled. This module does not blend Irish requirements with UK, US or other systems and does not claim automatic equivalence of qualifications, certifications, standards or job titles across countries.

Current Irish official rules, the employer's risk assessment, safe system of work, permit conditions, equipment manufacturer's instructions and workplace or training-centre instructions take precedence over this learning material. Where requirements differ, follow the competent Irish authority and the approved local procedure.

Introduction

Joining metal is central to gates, railings, sculpture, architectural ironwork, repair work and general fabrication. The craft decision is not simply “How can these pieces be joined?” A competent craftsperson also asks: “Is this joining process suitable for the design, the material, the workshop, the people nearby and the required quality?”

This module develops safe-practice thinking around forge welding, arc welding, brazing, riveting, bolting and related preparation or finishing operations. You will learn to identify hazards, select controls in the right order, plan a supervised joining task, recognise common errors and judge whether a finished joint is acceptable for its intended purpose.

No hazardous practical activity in this course is intended for unsupervised use. Live forging, hot riveting, welding, brazing, thermal cutting, grinding, gas-cylinder work and similar operations must only be carried out by learners who have been authorised for the task and are under the level of supervision required by their workplace or training provider.

How to use this module

Use the module before, during and after supervised workshop instruction. Before practical work, study the hazards and controls. During a demonstration, concentrate on control measures, communication and quality checkpoints rather than copying motions without understanding. After the task, compare the result with the drawing, sample, welding procedure or other job specification and record what you would improve.

The course distinguishes three ideas:

Hazard: something with the potential to cause harm, such as welding fume, hot scale, electrical energy or a rotating grinder.
Risk: the likelihood and possible severity of harm in the actual task and conditions.
Control measure: an action that eliminates the hazard or reduces exposure, preferably by design or engineering before relying on personal protective equipment.

Irish authority, training and standards context

Current Irish occupational-safety position

The principal Irish workplace-safety framework relevant to this module includes the Safety, Health and Welfare at Work Act 2005, the Safety, Health and Welfare at Work (General Application) Regulations 2007 to 2023, and, for hazardous chemical agents generated or used in joining work, the Safety, Health and Welfare at Work (Chemical Agents) Regulations 2001 to 2026. The Health and Safety Authority, or HSA, also publishes welding-fume guidance, fire-prevention guidance and safety alerts.

The HSA's current 2026 Chemical Agents Code of Practice is effective from 9 April 2026. It gives practical guidance for the Chemical Agents Regulations 2001 to 2026 and for the Carcinogens, Mutagens and Reprotoxic Substances Regulations 2024 and 2026. Some older HSA welding pages still display pre-2026 amendment dates, so current legislation and exposure-limit information should be checked on the HSA's current legislation and Code of Practice pages.

Important jurisdiction note — United Kingdom comparison: the term COSHH refers to United Kingdom regulations. The HSA states that COSHH does not apply in the Republic of Ireland. Do not import UK legal labels into an Irish risk assessment.

Useful official Irish sources for expert review:

The HSA states that a welding risk assessment must consider the process, material, gas, electrode or rod, location, other welding activity, ventilation and work practices, and must consider the welder and other workers in the area. Welding fume can contain hazardous components such as chromium VI compounds, nickel compounds, manganese and other substances depending on the process and material. Control measures must therefore be task-specific.

Irish vocational terminology and pathway

Irish apprenticeship material uses the craft title Metal Fabricator and terminology including MMA, MIG/MAG, TIG/TAG, oxy-fuel processes, thermal cutting, fabrication drawing, marking out and riveting. Those terms are used here where relevant.

Official Generation Apprenticeship material identifies Metal Fabrication as a Level 6 apprenticeship with an overall duration of four years. SOLAS is the coordinating body named for the craft route, with off-the-job training delivered through Education and Training Boards and Technological Universities. The official craft brochure states that successful completion leads to a Level 6 Advanced Certificate Craft — Metal Fabrication.

This aiMOOC is a learning resource only. It is not the Irish Metal Fabrication apprenticeship, does not award the Level 6 craft qualification and does not by itself qualify or certify a person to carry out welding or other hot work. Current entry, registration, provider and assessment requirements must be checked directly with SOLAS and Generation Apprenticeship.

Official training references:

No Irish qualification described here is presented as automatically equivalent to a qualification from another country.

Irish standards context

The National Standards Authority of Ireland, NSAI, publishes Irish-adopted standards used in welding and fabrication. Their application depends on the product, drawing, contract, procedure, employer requirement and applicable legislation. A standard is not a substitute for a risk assessment or competent supervision.

Examples checked as current in the NSAI catalogue on the review date include:

I.S. EN ISO 4063:2023: Welding, brazing, soldering and cutting — nomenclature of processes and reference numbers.
I.S. EN ISO 5817:2023: Quality levels for imperfections in fusion-welded joints within its stated material and process scope.
I.S. EN ISO 9606-1:2017: Qualification testing of welders for fusion welding of steels.

Do not assume that ISO 5817 acceptance levels apply to every decorative or forge-welded joint, or that ISO 9606-1 is automatically the qualification route for every artistic-metalwork task. Check the specified standard and its scope for the actual job.

Core concepts of safe joining

Choose the joining process before choosing the tool

A safe and economical design starts with the required function. Ask whether the joint must be permanent or demountable, whether it carries load, whether appearance matters, whether future repair is likely, whether heat could distort the work and whether coatings or unknown residues create additional hazards.

Typical options in blacksmithing and artistic metalwork include:

Process	Typical craft use	Main hazards to plan for	Quality focus
Forge welding	Traditional welded transitions, laminated or pattern-welded work, selected restoration work	Extreme heat, burns, hot scale, fire, hammering noise, poor grip, combustion products, flux or surface contaminants where used	Sound bond, correct alignment, intended section and finish
MMA welding	Repair and fabrication, especially where portability is useful	Welding fume, arc radiation, electric shock, fire, hot slag, leads, grinding	Correct weld size and profile, fusion, freedom from unacceptable imperfections
MIG/MAG welding	Gates, frames, fixtures, general fabrication and repeated joints	Welding fume, arc radiation, gas cylinders, electric shock, fire, wire-feed and grinding hazards	Fit-up, continuity, profile, distortion control and specified acceptance criteria
TIG/TAG welding	Controlled fabrication, stainless steel or aluminium work where specified, fine visible work	Fume and gases, arc radiation, electric shock, hot metal, shielding-gas risks, surface preparation	Clean joint, controlled profile, fit-up and distortion
Brazing	Decorative assemblies, repairs and dissimilar-metal work where suitable	Flame or hot-work fire risk, hot metal, flux fumes, cylinder hazards, surface-cleaning chemicals	Capillary flow where applicable, fit, continuous bond, clean finish
Hot riveting	Traditional gates, heritage-style ironwork, straps and visible mechanical joints	Hot rivet handling, burns, struck-by hazards, trapping, noise, coordination between workers	Tight joint, correct head formation, alignment and design intent
Cold riveting or bolting	Demountable or lower-heat assembly, selected decorative and sheet-metal work	Drilling, sharp edges, swarf, pinch points, torque or tool hazards	Hole alignment, seating, fastener security and surface finish

Safety principle: where a cold joining method satisfies the design and specification, it may eliminate or reduce thermal hazards and welding-fume generation. The HSA welding-risk guidance specifically lists alternative cold joining techniques as one way to reduce the need for welding.

Media note: the photograph above shows forge welding. It is useful for observing work position and the heated workpiece, but a photograph cannot show all controls required in an Irish workshop.

Visual process map

DESIGN NEED
    |
    v
Can the joint be made safely without hot work?
    | yes                         | no
    v                             v
Consider riveting, bolting        Select the justified hot process
or another suitable cold join     and identify its hazards
    |                             |
    +-------------+---------------+
                  v
        TASK-SPECIFIC RISK ASSESSMENT
                  |
                  v
   Engineering controls and safe work system
                  |
                  v
      Supervised setup and joining operation
                  |
                  v
  Isolation, hot-metal control and fire closeout
                  |
                  v
       Inspection against job criteria

The route through the map is not a permission to start work. It is a planning model. The responsible supervisor or employer decides whether the work may proceed.

Hazards and risk controls

Use the hierarchy of control

A strong control plan does not start with gloves or a helmet. It starts by asking whether the hazard can be removed or reduced at source.

Eliminate: redesign the joint so hot work is unnecessary where the design permits.
Substitute or reduce: choose a lower-fume or lower-hazard process or consumable where technically suitable; work on clean, known, uncoated material where the approved procedure permits.
Engineering controls: use task-suitable local exhaust ventilation, welding screens, guarding, jigs, mechanical handling, fixed extraction or other engineered measures.
Administrative controls: use risk assessments, permits, competent supervision, exclusion zones, training, inspection schedules, housekeeping, signage and coordinated work methods.
PPE and RPE: use correctly selected, compatible personal protective equipment and respiratory protective equipment where required. PPE is not a substitute for feasible higher-order controls.

Observe the image: the extraction inlet is placed to capture contaminants near their source. In practice, LEV must be suitable for the workpiece, process and movement of the weld. An extraction arm that works for a small fixed joint may be ineffective for a long weld on a large frame. Follow the task risk assessment and the LEV system's approved operating instructions.

Welding fume and ventilation

Welding fume is process-generated and its composition changes with the base metal, coating, filler, shielding gas, electrode, cleaning products and process. Surface coatings, contamination and associated grinding or polishing can add further hazards.

For an Irish welding task, the HSA advises a precautionary approach: control exposures to the lowest levels practicable, provide suitable ventilation and local extraction where appropriate, and use suitable RPE when engineering measures do not adequately control exposure. The exact RPE must be selected for the task and wearer. Tight-fitting facepieces, where used, depend on an effective face seal and any required fit testing; do not improvise respiratory protection.

A useful workshop question is: Where will the contaminant go before anyone breathes it? If the answer is “into the room”, the control strategy needs improvement.

Fire, explosion and hot-work control

The HSA defines hot work broadly as work that can generate sufficient heat, sparks or flame to cause a fire, including welding, flame cutting, soldering, brazing and grinding. Where hot work is justified, the HSA advises stringent controls and a hot-work permit system.

Key permit elements include clear responsibility, removal or protection of combustible materials, control of sparks and heat, suitable fire-fighting equipment and training, a designated fire watcher where required, supervision, clean closeout and a final check of the area at least 60 minutes after the completed job and before the premises are vacated.

Authentic Irish safety case: the HSA issued a safety alert after a fatal explosion involving hot work on an apparently empty 200-litre metal drum that still contained waste residue. The lesson for craft work is simple: never apply heat to a drum, tank or container until its contents are known and the fire and explosion risk has been properly assessed. Replacing the item or using a suitable cold method should be considered first. Such work must be authorised and supervised by an experienced competent supervisor.

Gas cylinders and oxy-fuel equipment

Oxygen and fuel-gas systems require process-specific training, correct storage, inspection and approved equipment. In workshop guidance, the HSA states that gas bottles should be racked and gas-welding bottles should be fitted with a flashback arrestor. Protect cylinders from impact and heat, keep them secured in the approved position and keep oxygen equipment free from incompatible contamination.

Image limitation: this Commons diagram is a generic oxy-gas illustration, not an Irish legal checklist. Use it to identify components only. Irish HSA guidance, the equipment manufacturer's instructions and the local approved procedure take precedence.

Arc radiation, electricity and people nearby

Arc welding creates intense visible, ultraviolet and infrared radiation. Controls must protect the operator and bystanders. Welding screens, correct eye and face protection, suitable clothing and controlled access all matter. A person passing a welding bay is part of the risk assessment, not an afterthought.

Electrical hazards increase with damaged leads, unsuitable equipment, wet conditions, poor connections and incorrect setup. The machine, leads, electrode holder, torch and work return must be inspected and used in accordance with the manufacturer's instructions and local inspection system. Defects are reported and the equipment is taken out of service according to workplace procedure.

Irish terminology note: the second image is described on Commons using the US term “shielded metal arc welding”. Irish SOLAS material commonly uses MMA, Manual Metal Arc, for this process family.

Hot metal, scale, impact and noise

Blacksmithing hazards often remain after the hammer stops. A dark-looking bar can still cause a serious burn. Establish a consistent workshop method for identifying, segregating and cooling hot material. Never assume that colour alone proves safe temperature.

When forging or hot riveting, plan:

secure grip with suitable tongs or holding tools;
stable anvil, vice, bolster or jig;
a clear strike zone and agreed communication between workers;
face and eye protection suitable for scale and flying particles;
hearing controls based on the noise assessment;
safe body position and exclusion of bystanders;
a designated location for hot stock and finished hot work.

Grinding, drilling and preparation hazards

Joining work usually includes preparation and finishing. Grinding can create sparks, dust, noise, vibration and high-speed fragments. Drilling can catch loose material and generate sharp swarf. Degreasing, pickling, coatings and fluxes may introduce chemical hazards.

Use the approved machine guard, workholding, extraction, inspection and PPE for the task. Secure the workpiece instead of holding it by hand where the machine procedure requires clamping. Do not grind or weld unknown plated, painted or contaminated metal until the material and required controls have been identified.

Ergonomics, handling and inclusion

Large gates, frames and sculpture can create handling hazards before joining begins. Use lifting aids, stands, trestles, positioners or team handling where the risk assessment requires them. Plan the joint so the learner is not forced into an unstable or excessively awkward position.

Inclusive safe practice means PPE and RPE must fit the individual, instructions must be understandable, and communication must work in noisy environments. Training can use diagrams, demonstrations, written checklists and agreed hand signals. A learner must not be pressured to perform a task beyond their authorised competence. Reasonable adjustments should preserve the required level of safety rather than quietly transferring risk to the learner or colleagues.

Tools and materials

Typical tools and equipment

A blacksmithing or artistic-metalwork joining area may contain:

Forge and hearth equipment, anvil, hammers, tongs, fullers, swages and set tools.
Welding power sources for MMA, MIG/MAG or TIG/TAG, electrode holders, torches, wire-feed systems, work returns and welding tables.
Oxy-fuel equipment, regulators, hoses, flashback arrestors and secured cylinders where the approved process requires them.
Vices, clamps, jigs, fixtures, bolsters and rivet sets for holding and aligning work.
Drills, grinders, saws and deburring tools for preparation and finishing.
LEV systems, welding screens, fire-control equipment, barriers and hot-metal storage locations.
Measuring and marking-out tools such as rules, squares, scribers, templates and gauges.

A learner should know the function of a tool before using it and must know the stop, isolation and defect-reporting procedure for equipment they are authorised to operate.

Typical materials and consumables

Irish Metal Fabrication apprenticeship material includes low-carbon steel, stainless steel, alloy steel and aluminium. Artistic metalwork may also involve copper, brass or other materials where the training programme, design and approved process allow them.

Consumables can include MMA electrodes, MIG/MAG wire, TIG filler, shielding gases, brazing filler, fluxes, fasteners and surface-preparation products. Their labels, safety data sheets where applicable, storage conditions and compatibility matter. Never identify an unknown coating by heating it.

Supervised step-by-step demonstration

Demonstration: planning and completing a small MIG/MAG practice joint

Purpose: demonstrate a safe workflow for a short non-structural low-carbon-steel practice joint in an approved training bay. This is not a standalone welding instruction and gives no machine settings, gas pressures or substitute procedures.

Supervision rule: the instructor or authorised craftsperson controls the training bay, approves the learner, selects the process parameters and stops the task if conditions change. A learner performs the live weld only when the training provider has authorised that learner for the exercise.

Confirm the job. Read the drawing or training sheet; identify the joint type, material, required dimensions and acceptance criteria.
Confirm permission. Review the task risk assessment, local welding procedure, supervision arrangements and any hot-work permit that applies.
Identify the material. Use known, approved, clean low-carbon steel practice pieces. Stop if the coating, contamination or previous use is uncertain.
Prepare the area. Remove or protect combustible material, establish the welding screen or exclusion zone and make sure the floor and escape route are clear.
Set the controls. Position task-suitable LEV before welding. Confirm any required RPE, fire equipment and fire-watch arrangements.
Inspect equipment. The authorised person checks the welding set, torch, work return, wire-feed system, hoses or gas connection as applicable and takes defective equipment out of use.
Fit and clamp. Measure, align and securely clamp the pieces in a stable position so the joint can be reached without unstable posture.
Check PPE compatibility. Confirm eye and face protection, protective clothing, gloves, footwear, hearing protection and RPE required by the assessment; make sure items work together without defeating one another.
Instructor sets the process. The authorised instructor or craftsperson sets and verifies machine parameters and shielding-gas arrangements to the approved procedure.
Make the joint under direct supervision. Maintain the approved body position and extraction position. Stop immediately if extraction fails, the screen is displaced, a fire risk appears or equipment behaves abnormally.
Control the hot work after the arc stops. Isolate equipment as required by the local procedure, place or mark hot work in the designated location and prevent unprotected contact.
Inspect and close out. When safe to handle, check alignment, size, continuity and visible imperfections against the training specification. Complete the fire-watch and final-area check required by the permit or workplace procedure; HSA hot-work guidance specifies a final check at least 60 minutes after the job.

Use the image only to discuss observable weld appearance. A photograph cannot prove internal soundness, penetration, mechanical performance or compliance with a specification.

Craft examples

Example: decorative gate frame

A fabricated gate frame in low-carbon steel may be assembled using MIG/MAG welding because it allows efficient production of repeated joints. Safe planning includes fume control, screens for people nearby, distortion management, stable support for the frame and fire control during grinding and welding. Quality is judged against the drawing and job specification, not simply by whether the joint “looks strong”.

Example: traditional hot-riveted strap

A visible hot rivet can be part of the design language of forged architectural ironwork. The operation needs coordinated teamwork: one person may heat and transfer the rivet while another supports and forms it. The risk assessment must control hot material, dropped rivets, strike zones, noise, trapping and communication.

England — craft demonstration only, not Irish legal or safety guidance. The following video by artist blacksmith Joel Tarr shows hot riveting. Use it for visual analysis of the joining principle. Irish HSA requirements and the local supervised procedure take precedence.

Example: forge-welded transition

A forge weld can preserve a traditional hand-forged appearance and avoid a visible arc-weld bead in selected work. It also introduces intense heat, scale, combustion and fire hazards. A learner should first practise stock control, tongs, hammer coordination and heat management under supervision before a forge-welding exercise is introduced.

United States — craft technique reference only, not Irish legal or safety guidance. The following Black Bear Forge video introduces forge welding as a blacksmithing technique. It is useful for observing the sequence and material handling, but it is not a substitute for competent Irish workshop instruction.

Example: brazed decorative detail

Brazing may be chosen where the joint design, parent metals and appearance suit a filler metal that melts below the parent material. The learner must still treat the operation as hot work: flame control, fire prevention, ventilation, flux or surface-preparation hazards and hot-metal handling all require planning. Never infer a safe flux or cleaning method from colour or smell.

Common errors and corrective thinking

Common error	Why it matters	Better practice
Starting with PPE instead of the hazard	Leaves avoidable hazards in place	Apply the hierarchy of control and eliminate or engineer out risk where practicable
Welding coated or unknown metal	Can generate unexpected hazardous fumes and contaminate the joint	Identify the material and coating before work; follow the risk assessment and approved preparation method
Extraction hood too far away or poorly positioned	Fume enters the breathing zone or spreads through the workshop	Use LEV designed for the task and position it according to the approved procedure
Treating a dark workpiece as cold	Residual heat can cause burns or ignite material	Use the workshop's designated hot-metal identification and storage method
Loose or unstable fit-up	Increases distortion, poor alignment and unsafe movement during joining	Clamp or fixture the work securely before live work
Using a grinder as a substitute for poor welding technique	Can hide defects, remove required section and add dust, noise and spark hazards	Correct fit-up and process control first; grind only as specified
Reusing an “empty” drum for a hot-work project	Residual vapour or liquid can create a fatal explosion risk	Do not apply heat until contents and risks are formally established; prefer a purpose-made container or cold alternative
Copying a video setting or gas arrangement	Machine, material, consumable and workplace conditions differ	Use the approved local welding procedure and manufacturer instructions
Assuming a standard applies because it has “welding” in its title	Standards have defined scopes and contractual contexts	Check the exact job specification and the current NSAI standard

Quality criteria

Safety and quality reinforce one another. Poor fit-up may force awkward posture; excessive rework adds fume, grinding and energy use; a rejected component consumes material and time.

For a vocational joining task, quality criteria may include:

Dimensions and alignment: the assembly matches the drawing, template and tolerances specified for the job.
Joint location and fit-up: contact, root gap, overlap or hole position is as specified before joining.
Visible soundness: there are no cracks or other visible imperfections that exceed the stated acceptance criteria.
Profile and size: an arc weld has the required size, length and profile; a rivet head has the intended form and seating; a forge weld preserves the required section and transition.
Distortion control: the assembly remains within specified straightness, squareness or form.
Surface finish: grinding, filing, dressing or scale removal is only carried out to the required finish and does not weaken the joint.
Functional result: a moving gate, hinge, latch or sculptural assembly works as intended without binding or unsafe sharp edges.
Traceability: where the job requires it, process, material, inspection or welder records are complete.

If a drawing or contract invokes I.S. EN ISO 5817:2023 within its scope, use the specified quality level and inspection method rather than inventing your own acceptance rule.

Sustainability and resource efficiency

Safe joining and sustainable joining often point in the same direction.

Design for repair: preserve serviceable ironwork and replace only what is necessary where the design and condition allow.
Design for disassembly: use bolts or other reversible joints when future maintenance or reuse benefits from disassembly and the specification permits.
Material efficiency: plan cut lists, reuse suitable offcuts and avoid avoidable rework.
Energy efficiency: heat only the necessary work and maintain forges, compressors, extraction and welding equipment so they operate as intended.
Fume prevention: reducing unnecessary welding and using clean, known material can reduce both exposure and process waste.
Waste segregation: separate metal scrap and process wastes according to the workplace waste plan; contaminated residues, spent chemicals or special wastes require the approved disposal route.
Long-life finish: choose preparation and corrosion protection appropriate to the environment so the object lasts and needs fewer repairs.
Repairability: document hidden joints and materials so a future craftsperson can maintain the work without destructive guesswork.

Do not trade safety for a small energy or material saving. A lower-energy method is not sustainable if it creates an uncontrolled exposure, a defective joint or unsafe manual handling.

Glossary

Term	Meaning in this module
Arc welding	A family of joining processes using an electric arc as the heat source.
Brazing	Joining with a filler metal that melts and flows without melting the parent metals in the same way as fusion welding.
Competent person	A person with the training, knowledge, experience and other qualities needed for the assigned safety-critical role; competence is task and context specific.
Fit-up	The alignment, spacing and positioning of parts before joining.
Forge welding	Joining heated metal by forging surfaces together under suitable conditions.
Hot work	Work capable of generating enough heat, sparks or flame to create a fire risk, including welding, flame cutting, soldering, brazing and grinding in HSA fire guidance.
Hot-work permit	A controlled authorisation system setting conditions and responsibilities for hot work.
LEV	Local exhaust ventilation; an engineering control that captures airborne contaminants close to where they are generated.
MIG/MAG	Metal Inert Gas or Metal Active Gas welding, terms used in Irish Metal Fabrication training material.
MMA	Manual Metal Arc welding, a term used in Irish Metal Fabrication training material.
RPE	Respiratory protective equipment selected to reduce inhalation exposure when required as part of the control strategy.
Risk assessment	A systematic examination of hazards, people exposed, risk and required controls for the actual task.
TIG/TAG	Tungsten Inert Gas or Tungsten Active Gas welding terminology appearing in Irish craft material.
Work return	The electrical connection that completes the welding circuit between the power source and work; it is often casually but inaccurately called an earth clamp.
WPS	Welding Procedure Specification; a controlled document specifying how a weld is to be made where the job system requires one.

Reflection

Before a supervised joining task, answer these questions in your learning journal:

Which hazard can be eliminated before I put on PPE?
Who else could be exposed to fume, arc radiation, sparks, noise or hot material?
What would make me stop the job immediately?
How will hot metal be identified after the joining operation?
Which quality criterion can I check before joining so that I avoid hazardous rework?
Which part of the local procedure would I need explained again before practical work?

Interactive Tasks

Quiz: Test Your Knowledge

Which jurisdiction governs the legal and vocational references in this module? (Republic of Ireland) (!United Kingdom) (!United States) (!Australia)

What should you consider first when applying the hierarchy of control to a joining task? (Eliminating the hazard) (!Choosing thicker gloves) (!Adding warning signs) (!Selecting a darker helmet)

What is the main purpose of local exhaust ventilation during welding? (Capture contaminants near the source) (!Cool the weld rapidly) (!Increase arc brightness) (!Replace all other controls)

What should happen before hot work is considered on an apparently empty drum? (The contents and explosion risk must be established) (!The drum should be struck with a hammer) (!The lid should be painted) (!The drum should be heated outdoors)

What is a central purpose of a hot-work permit? (Control and authorise fire-risk work) (!Set the selling price) (!Measure weld hardness) (!Choose decorative colours)

Which process is a cold joining option when the design permits it? (Bolting) (!Brazing) (!Forge welding) (!Flame cutting)

Why must other workers be considered in a welding risk assessment? (They can also be exposed to the hazards) (!They set the welding current) (!They own the workpiece) (!They select the paint colour)

Which chemical-agent regulations are current in Ireland for this module? (Chemical Agents Regulations 2001 to 2026) (!UK COSHH Regulations) (!Chemical Agents Regulations 1990 to 1995) (!Federal Welding Code)

When should a learner copy machine settings from an online welding video? (Never without the approved local procedure) (!Whenever the metal looks similar) (!Whenever the video has many views) (!Whenever the workshop is quiet)

What award is associated with successful completion of the Irish Metal Fabrication apprenticeship described here? (Level 6 Advanced Certificate Craft) (!Level 2 Welding Licence) (!Master Blacksmith Certificate) (!International Forge Permit)

Memory Game

LEV	Captures airborne contaminants close to their source
Fit-up	Alignment and positioning of parts before joining
RPE	Equipment selected to protect the wearer's breathing
Hot-work permit	Controlled authorisation for fire-risk work
Riveting	Mechanical joining using a formed rivet
Forge welding	Joining heated metal by forging the surfaces together
Work return	Connection completing the welding circuit through the work

Drag and Drop

Match the correct terms.	Topic
Captures welding fume near its source	Local exhaust ventilation
Keeps parts aligned before joining	Jig or clamp
Controls authorised hot work	Hot-work permit
Allows future disassembly where suitable	Bolted joint
Checks the finished work against requirements	Inspection

Match each control purpose with the correct joining-work term.

Crossword Puzzle

Ventilation	What general air-control concept helps manage airborne contaminants in a workshop?
Riveting	Which mechanical joining process forms a rivet to hold parts together?
Isolation	What action separates equipment from hazardous energy before specified maintenance or closeout?
Supervision	What oversight is required for a learner carrying out hazardous practical work?
Extraction	What source-control action is performed by a suitable LEV system?
Brazing	Which hot joining process uses a filler metal without fusion-welding the parent pieces?

LearningApps

Cloze Text

This module uses the Republic of

as its jurisdiction. A welding task needs a task-specific

. Suitable

captures airborne contaminants close to their source. A cold joint such as bolting may remove the need for

. A dark piece of steel must not automatically be assumed to be

. Welding screens help protect people nearby from arc

. The Irish vocational term for Manual Metal Arc welding is

. Finished work is checked against the job's stated

. Official HSA guidance and approved workplace instructions take

over this course.

Open-Ended Tasks

Easy

Hazard spotting: From a teacher-provided workshop photograph, identify five joining hazards and explain which people could be affected; do not enter an active work area to collect your own photograph.
Control hierarchy poster: Create an illustrated poster showing elimination, engineering controls, administrative controls and PPE for one joining process.
Hot metal communication: Design a simple visual sign and short verbal callout that could help a supervised workshop communicate that a workpiece is still hot.
Joint comparison: Examine teacher-provided cold samples or photographs of a riveted, bolted and welded joint and describe one strength and one limitation of each joining approach.

Standard

Supervised workshop walk-through: With an instructor, map the authorised joining area, noting extraction, screens, hot-metal zones, escape routes and fire-control points without operating equipment.
Craftsperson interview: Interview an experienced Metal Fabricator or blacksmith about how they decide between welding, riveting and bolting; ask how safety and appearance influence the choice.
LEV observation study: During an instructor-led demonstration, sketch the position of the extraction relative to the source and explain why the position may need to change as the work moves.
Quality sample report: Compare approved sample joints against a drawing or training specification and write an inspection report that separates dimensional issues, visible imperfections and finish.

Advanced

Risk assessment workshop: In a supervised classroom exercise, draft a risk assessment for joining a decorative low-carbon-steel frame, including people nearby, fume, fire, electricity, handling and finishing hazards.
Safe system of work plan: Write a step-by-step safe work plan for an instructor-approved joining exercise, including stop criteria, equipment checks, hot-metal control and post-work closeout; do not carry out the plan unless separately authorised.
Sustainability audit: Compare two technically suitable joining methods for a repair and evaluate energy use, rework, material waste, repairability, fume generation and service life without assuming that the lowest-energy option is automatically safest.
Instructional video project: Produce a short video in which a competent instructor demonstrates safe planning and inspection of a joining task; learners may film, narrate and annotate but must not perform unauthorised hot work for the recording.

Learning Assessment

Control strategy analysis: Given a proposed MIG/MAG task on a large gate frame, explain which hazards should be eliminated or engineered out before PPE is selected and justify your choices.
Incident reasoning: Analyse the HSA drum safety-alert scenario and explain how material history, authorisation, supervision and process substitution could break the chain leading to an explosion.
Process selection: Choose between a hot rivet, bolt and welded joint for a teacher-provided artistic-metalwork brief and defend the selection using function, appearance, repairability, safety and quality criteria.
Quality and safety transfer: Explain how poor fit-up can lead both to a quality defect and to increased safety exposure through rework, grinding or awkward welding posture.
Jurisdiction check: Review a mixed list of Irish and foreign safety terms, identify which claims require Irish authority verification and explain why automatic cross-country equivalence is unsafe.
Supervised demonstration critique: Observe an instructor-led joining demonstration and produce a structured critique covering preparation, controls, communication, stop criteria, closeout and inspection.

Evidence of Learning

Evidence of learning should show more than recall. A strong learner portfolio may contain:

Evidence type	What it demonstrates
Knowledge	Accurate explanation of joining hazards, hierarchy of control, Irish terminology, hot-work principles and the distinction between law, standards and workplace procedure
Risk-thinking skill	Ability to identify who may be exposed, select controls in the correct order and recognise when a task must stop
Planning product	A clear risk-assessment exercise, safe work plan, annotated workshop layout or hot-work control checklist produced for assessment
Observation skill	Accurate notes from a supervised demonstration showing attention to extraction, screens, fit-up, hot-metal handling, closeout and quality checks
Quality evidence	Inspection of sample joints against a drawing, template, WPS or stated acceptance criteria rather than personal preference alone
Communication	Use of clear professional terms and safe handover language with peers, instructors and supervisors
Sustainability transfer	A justified joining choice that considers repairability, waste, energy, rework and service life without compromising safety
Jurisdictional literacy	Ability to distinguish Irish HSA, SOLAS and NSAI sources from foreign systems and to avoid claims of automatic equivalence

Practical competence must be assessed separately in the approved workshop environment by the responsible training provider or employer. Completion of online tasks alone is not evidence that a learner can safely perform welding, forge welding, hot riveting, brazing or related hazardous operations.

OERs on the Topic

This aiMOOC text is licensed for open educational reuse under CC BY-SA 4.0. Wikimedia Commons files embedded above remain under the licence stated on each Commons file page. YouTube videos are external references and are not relicensed as part of this aiMOOC; check their current availability and reuse terms before redistributing them.

Open and official learning references:

Linked Learning Areas

Joining processes

This module links craft knowledge, vocational safety, fabrication drawing, materials science, occupational hygiene, fire prevention, quality assurance, design for repair and sustainable resource use.

Expert review checklist

Before using this module in delivery, an Irish subject-matter expert should:

confirm that HSA legal and guidance links remain current;
confirm current SOLAS or Generation Apprenticeship pathway details;
confirm the scope and current status of any NSAI standard specified for local assessment;
check that images and external videos remain available and appropriately licensed or linked;
adapt practical controls to the actual forge, welding bay, LEV, tools, materials and learner cohort;
verify that no learner practical task exceeds the training provider's authorisation and supervision arrangements.

The module deliberately avoids machine settings, fuel-gas pressures, flux recipes and other task-specific operating values because these must come from approved procedures, manufacturers, specifications and competent instruction.

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Diesen aiMOOC als Battle spielen: Englisch, Klasse 5-6, G-Niveau

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