Carry out motor vehicle body metal active gas (MAG) welding operations
URN: IMICB19
Business Sectors (Suites): Coachbuilding
Developed by: IMI
Approved on:
30 Mar 2023
Overview
This unit is about joining materials safely, correctly and effectively using metal active gas (MAG) welding techniques and procedures.
Welding involves the melting of the parent metal (steel) which fuses with the filler metal - a total fusion process.
Performance criteria
You must be able to:
P1 use the appropriate personal protective equipment (PPE) when carrying out MAG welding operations
P2 protect the vehicle and its contents effectively when carrying out MAG welding operations
P3 prepare material and align to enable suitable join to be achieved, ensuring mating flanges are treated following manufacturers' procedures before joining
P4 select, set up and use the correct tools and equipment for carrying out MAG welding operations
P5 ensure that the tools, equipment and PPE you require are in a safe working condition
P6 set up your equipment to carry out MAG welding operations checking:
P6.1 suitability of gas / filler wire and size for material to be joinedP6.2 parameters are set correctlyP6.3 consumables are correctP6.4 feed rollers and welding tipP7 carry out MAG welding operations following:P7.1 recognised researched repair methodsP7.2 test procedures, including providing test coupons on equivalent material in accordance with British StandardsP7.3 manufacturers processes, methods and proceduresP7.4 your workplace proceduresP7.5 health, safety and legal requirementsP8 avoid damaging other components, units, panels and surfaces on the vehicle and the surrounding work areaP9 recognise when your weld is not forming correctly and what action needs to be takenP10 inspect and assess MAG weld quality in accordance with British Standards and manufacturers specificationP11 check integrity of weld and record the type of weld achieved on the appropriate paperworkP12 ensure test pieces are recorded and storedP13 dress the joint area without reducing material thickness and protect the repaired area to inhibit corrosion where applicableP14 clean and store PPE and equipment in appropriate mannerP15 promptly report any additional faults you notice during the course of your work to the relevant person(s)P16 promptly report any delays in completing your work to the relevant person(s)P17 carry out MAG welding operations within the agreed timescaleP18 complete work records accurately, in the format required and promptly pass them to the relevant person(s)
Knowledge and Understanding
You need to know and understand:
K1 the health, safety and legal requirements relating to the joining of materials using MAG welding techniques
K2 your workplace procedures for:
K2.1 the referral of problemsK2.2 reporting of delays to the completion of workK2.3 completion of work recordsK3 the work that needs to be done and the standard requiredK4 the requirements for protecting the vehicle and contents from damage before, during and after the joining of materials using MAG welding techniquesK5 the importance of selecting, using and maintaining the appropriate PPE when joining materials using MAG welding techniquesK6 how to find, interpret and use sources of information applicable to the joining of materials using MAG welding techniques and the implications of not fully understanding the repair methods presentedK7 how to select, check, maintain and set up all of the tools and equipment required to correctly join materials using MAG welding techniquesK8 the different types of welding processes, techniques and joints used for the joining of materials when using MAG welding techniques
K9 the correct surface preparation methods to ensure a good MAG weld is achieved and the reasons why surface preparation is importantK10 the faults and defects that can occur when carrying out MAG welding and the common causes of these faultsK11 the need for correct alignment of materials and the methods used to achieve thisK12 the types of quality control checks that can be used to ensure correct joining of materialsK13 how to inspect and assess MAG welding in accordance with British StandardsK14 when MAG welding should be used to join materialsK15 the difference between MAG welding techniques and other welding methodsK16 the different types of joint that can be used to join materials using MAG welding, including:
K16.1 lap plugK16.2 lap seamK16.3 butt jointK16.4 fillet jointK17 the implications of electro-magnetic fields and the effects on medical devicesK18 the hazards of inhaling welding fumes
Scope/range
All of the items listed below form part of this National Occupational Standard.
1. Personal protective equipment (PPE) for metal active gas (MAG) welding operations includes:
1.1. face mask with appropriate eye protection1.2. protective/flame retardant coveralls1.3. protective/flame retardant gauntlets1.4. steel toe cap boots1.5. appropriate vehicle protection1.6. appropriate protection for others in the workshop1.7. appropriate fume mask
2. Tools and equipment are:2.1. workshop equipment2.2. generic hand tools2.3. manufacturer's specified and specialist tools2.4. fume extraction equipment
Scope Performance
Scope Knowledge
Values
Behaviours
Skills
Glossary
Links To Other NOS
External Links
Version Number
1
Indicative Review Date
30 Mar 2026
Validity
Current
Status
Original
Originating Organisation
IMI
Original URN
IMIBB19
Relevant Occupations
Body Repair and Alignment Technician (Automotive), Body Repair Technician (Automotive), Engineering, Vehicle Trades, Coachbuilder
SOC Code
5232
Keywords
Motor; vehicle; body; MAG; welding; operations;