Major Work Activity B - Performs layout and fabrication of components for welding
Table of Contents
Task B-7 Performs layout
Task Descriptor
Welders lay out materials before any fabrication procedure such as cutting, drilling, bending and welding. It is important that the layout be done properly to prevent waste and ensure proper fit and accuracy.
B-7.01 - Develops templates
| NL | NS | PE | NB | QC | ON | MB | SK | AB | BC | NT | YT | NU |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| yes | yes | yes | yes | NV | yes | yes | yes | yes | yes | NV | NV | NV |
| Reference Code | Performance Criteria | Evidence of Attainment |
|---|---|---|
| B-7.01.01P | select and use measuring and layout tools and equipment | measuring and layout tools and equipment are selected and used according to task |
| B-7.01.02P | determine template materials and properties | template materials and properties are determined according to specific application |
| B-7.01.03P | determine starting point | starting point is determined according to working point and axis |
| B-7.01.04P | extend or create lines from working points | lines are extended or created from working points |
| B-7.01.05P | transfer dimensions from drawing to template | dimensions are transferred from drawing to template |
| B-7.01.06P | complete profile | profile is completed from transferred dimensions |
| B-7.01.07P | shape template | template is shaped using measuring and layout tools and equipment according to template materials |
| B-7.01.08P | mark template with information | template is marked with information |
Range of Variables
- measuring and layout tools and equipment include: combination squares, measuring tapes, plumb bobs, marking devices, compasses, trammel points, straightedges, string lines, dividers, levels, transfer punches, center punches, radius markers
- properties include: durability, fire resistance
- template materials include: wood, cardboard, metal, paper
- information includes: part numbers, layout information, material required
| Reference Code | Learning Outcomes | Learning Objectives |
|---|---|---|
| B-7.01.01L | demonstrate knowledge of templates, their characteristics and applications | identify types of templates, and describe their characteristics and applications |
| describe principles of templates | ||
| interpret information pertaining to templates found on drawings and specifications | ||
| identify template materials, and describe their properties and applications | ||
| identify imperial and metric systems of measurements and describe conversion factors | ||
| identify reference points and dimensions that need to be transferred | ||
| identify starting point, working points and axis, and describe their characteristics and applications | ||
| identify information marked on templates, and describe their characteristics and applications | ||
| B-7.01.02L | demonstrate knowledge of procedures to develop templates | identify measuring and layout tools and equipment used to develop templates, and describe their procedures for use |
| identify digital measuring tools used to develop templates and describe their characteristics, applications and procedures for use | ||
| identify hazards, and describe safe work practices pertaining to developing templates | ||
| describe procedures to develop template | ||
| describe procedures to identify starting point, working points and axis | ||
| describe procedures to transfer dimensions from drawing to template | ||
| describe procedures to complete profile | ||
| describe procedures to cut template | ||
| describe procedures to dispose of and recycle templates | ||
| describe template materials | ||
| B-7.01.03L | demonstrate knowledge of emerging technologies related to developing templates | identify emerging technologies related to developing templates, and describe their characteristics and applications |
Range of Variables
- types of templates include: hole-punching templates, wrap arounds, cutting templates, arc templates (sweeps)
- properties include: durability, fire resistance
- information includes: part numbers, layout information, material required
- measuring and layout tools and equipment include: combination squares, measuring tapes, plumb bobs, marking devices, compasses, trammel points, straightedges, string lines, dividers, levels, transfer punches, center punches, radius markers
- digital measuring tools include: calipers, levels, measuring devices
- hazards include: pinch points, burns, debris
- template materials include: wood, cardboard, metal, paper
B-7.02 - Transfers dimensions from drawings to materials
| NL | NS | PE | NB | QC | ON | MB | SK | AB | BC | NT | YT | NU |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| yes | yes | yes | yes | NV | yes | yes | yes | yes | yes | NV | NV | NV |
| Reference Code | Performance Criteria | Evidence of Attainment |
|---|---|---|
| B-7.02.01P | select and use measuring and layout tools and equipment | measuring and layout tools and equipment are selected and used according to task |
| B-7.02.02P | interpret information from drawings and welding symbols | information is interpreted from drawings and welding symbols and is transferred to materials |
| B-7.02.03P | determine work points | work points are determined to identify location and orientation of components according to drawings |
| B-7.02.04P | perform mathematical calculations | mathematical calculations are performed according to task |
| B-7.02.05P | determine total material required | total material required is determined according to factors to maximize efficiency and quality |
| B-7.02.06P | verify layout for accuracy | layout is verified for accuracy according to drawings, specifications, and company policies and procedures |
Range of Variables
- measuring and layout tools and equipment include: combination squares, measuring tapes, plumb bobs, marking devices, compasses, trammel points, straightedges, string lines, dividers, levels, transfer punches, center punches
- work points include: centre lines, hole locations, end preparation lines, base point, axis
- mathematical calculations include: conversions, ratios, proportions, fractions, geometry, decimals
- factors include: size, material usage, seam location, bend allowances, kerf, job requirements
| Reference Code | Learning Outcomes | Learning Objectives |
|---|---|---|
| B-7.02.01L | demonstrate knowledge of transferring dimensions from drawings to template material | identify template materials, and describe their characteristics and applications |
| interpret information and symbols pertaining to dimensions found on drawings and specifications | ||
| identify work points and axis, and describe their characteristics and applications | ||
| B-7.02.02L | demonstrate knowledge of procedures to transfer dimensions from drawings to materials | identify measuring and layout tools and equipment used to transfer dimensions from drawings to materials, and describe their procedures for use |
| identify digital measuring tools used to transfer dimensions from drawings to materials and describe their characteristics, applications and procedures for use | ||
| identify hazards, and describe safe work practices pertaining to transferring dimensions from drawings to materials | ||
| describe procedures to transfer dimensions from drawings to materials | ||
| describe procedures to determine work points | ||
| perform mathematical calculations used to transfer dimensions from drawings to materials | ||
| describe procedures to verify layout |
Range of Variables
- template materials include: wood, cardboard, metal
- measuring and layout tools and equipment include: combination squares, measuring tapes, plumb bobs, marking devices, compasses, trammel points, straightedges, string lines, dividers, levels, transfer punches, center punches
- digital measuring tools include: calipers, levels, measuring devices
- hazards include: pinch points, burns, debris, cuts
- work points include: centre lines, hole locations, end preparation lines, base point, axis
- mathematical calculations include: conversions, ratios, proportions, fractions, geometry, decimals
Task B-8 Fabricates components
Task Descriptor
Fabrication is the process done prior to welding. It involves preparation of materials and fitting and assembling them. These processes are often done in conjunction with other tradespersons. It is critical that pieces be fabricated within the tolerances of specifications.
B-8.01 - Prepares materials
| NL | NS | PE | NB | QC | ON | MB | SK | AB | BC | NT | YT | NU |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| yes | yes | yes | yes | NV | yes | yes | yes | yes | yes | NV | NV | NV |
| Reference Code | Performance Criteria | Evidence of Attainment |
|---|---|---|
| B-8.01.01P | select and use tools and equipment | tools and equipment are selected and used according to task |
| B-8.01.02P | verify components’ dimensions, conditions and grade | components’ material type, grade, thickness and size are verified to ensure compliance with job specifications |
| B-8.01.03P | verify all preparation processes have been completed | all preparation processes have been completed according to drawings and specifications |
| B-8.01.04P | clean weld areas | weld areas are cleaned using abrasive techniques according to WPS/WPDS, job specifications and material requirements |
| B-8.01.05P | prepare edge for assembly | edge is prepared for assembly by squaring or bevelling according to job specifications, tolerances and information in welding symbols |
Range of Variables
- preparation processes include: drilling, punching, forming, grinding, thermal processes
- abrasive techniques include: grinding, using a file, chemicals
| Reference Code | Learning Outcomes | Learning Objectives |
|---|---|---|
| B-8.01.01L | demonstrate knowledge of welding components and materials, their characteristics and applications | identify welding components and materials, and describe their characteristics and applications |
| interpret information pertaining to welding components and materials found on drawings and specifications | ||
| describe preparation process | ||
| describe cleaning process using abrasive techniques | ||
| describe characteristics and applications of dimensional tolerances | ||
| describe imperial and metric systems of measurements and conversions | ||
| B-8.01.02L | demonstrate knowledge of procedures to prepare welding components and materials | identify tools and equipment used to prepare welding components and materials, and describe their procedures for use |
| identify hazards, and describe safe work practices pertaining to preparing welding components and materials | ||
| describe procedures to perform material preparation processes | ||
| describe procedures to clean weld areas | ||
| describe procedures to prepare edge for assembly | ||
| describe procedures to dispose of and recycle welding components and materials |
Range of Variables
- preparation processes include: drilling, punching, forming, grinding, thermal processes
- abrasive techniques include: grinding, using a file, chemicals
- hazards include: pinch points, burns, debris
B-8.02 - Fits components for welding
| NL | NS | PE | NB | QC | ON | MB | SK | AB | BC | NT | YT | NU |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| yes | yes | yes | yes | NV | yes | yes | yes | yes | yes | NV | NV | NV |
| Reference Code | Performance Criteria | Evidence of Attainment |
|---|---|---|
| B-8.02.01P | select and use tools and equipment for tacking | tools and equipment for tacking are selected and used according to task |
| B-8.02.02P | join components mechanically | components are joined mechanically according to drawings and specifications using clamps and fixtures |
| B-8.02.03P | pre-heat base metals for tacking | base metals are pre-heated for tacking according to job specifications |
| B-8.02.04P | select tacking materials and tacking methods | tacking materials and tacking methods are selected according to job specifications |
| B-8.02.05P | join components by tacking | components are joined by tacking according to job specifications |
| B-8.02.06P | identify and repair common discontinuities in a tack | discontinuities in tack are identified and repaired according to industry approved repair procedures |
| B-8.02.07P | identify and repair common defects in a tack | defects in tack are identified and repaired according to industry approved repair procedures |
| B-8.02.08P | identify methods to control expansion and contraction | methods to control expansion and contraction are identified |
Range of Variables
- tools and equipment include: hi-lo gauges, wedges, clamps, sawhorses, jigs, fixtures
- tacking methods include: bridge, penetrating, plug
- discontinuities include: porosity, slag inclusions
- defects include: lack of penetration, incomplete penetration, lack of fusion, incomplete fusion, undercut, spatter, slag inclusions, cracks, porosity, overlap
- methods to control expansion and contraction include: using strongbacks, gussets and tacking sequence, heat sinks
| Reference Code | Learning Outcomes | Learning Objectives |
|---|---|---|
| B-8.02.01L | demonstrate knowledge of components for welding, their characteristics, applications | identify components for welding, and describe their characteristics and applications |
| interpret information pertaining to components for welding found on drawings and specifications | ||
| identify types of base metals, and describe their characteristics and applications | ||
| identify types and sizes of tacks, and describe their characteristics and applications | ||
| describe pre-heating requirements for tacking | ||
| describe sequence of tacks | ||
| describe welding processes to be used after tacking | ||
| describe impact of tack welding on base metals | ||
| describe inspection requirements for components | ||
| B-8.02.02L | demonstrate knowledge of procedures to fit components for welding | identify tools and equipment used to fit components for welding, and describe their procedures for use |
| identify hazards, and describe safe work practices pertaining to fitting components for welding | ||
| describe procedures to join components for welding | ||
| describe tacking methods | ||
| describe methods to control expansion and contraction | ||
| describe procedures to repair common defects in a tack | ||
| describe procedures to dispose of and recycle components for welding | ||
| B-8.02.03L | demonstrate knowledge of regulatory requirements pertaining to tacking components | identify codes, standards and regulations pertaining to tacking components |
Range of Variables
- tools and equipment include: hi-lo gauges, wedges, clamps, sawhorses, jigs, fixtures
- hazards include: pinch points, burns, debris, rotating equipment
- tacking methods include: bridge, penetrating, plug
- methods to control expansion and contraction include: using strongbacks, gussets and tacking sequence, heat sinks
- defects include: lack of penetration, incomplete penetration, lack of fusion, incomplete fusion, undercut, spatter, slag inclusions, cracks, porosity, overlap
B-8.03 - Assembles components
| NL | NS | PE | NB | QC | ON | MB | SK | AB | BC | NT | YT | NU |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| yes | yes | yes | yes | NV | yes | yes | yes | yes | yes | NV | NV | NV |
| Reference Code | Performance Criteria | Evidence of Attainment |
|---|---|---|
| B-8.03.01P | select and use tools and equipment | tools and equipment are selected and used according to task |
| B-8.03.02P | determine sequence for assembly | sequence for assembly is determined according to drawings |
| B-8.03.03P | set gaps and alignments | gaps and alignments are set within tolerance levels according to specifications |
| B-8.03.04P | fit, place and adjust components | components are fit, placed and adjusted, ensuring they are level, plumb and orientated according to drawings |
| B-8.03.05P | fasten components | components are fastened together using fastening devices according to plans and specifications |
| B-8.03.06P | verify assembly throughout all stages | assembly is verified throughout all stages according to drawings and specifications |
Range of Variables
- tools and equipment include: hi-lo gauges, wedges, clamps, sawhorses, jigs and fixtures, cranes, slings, alignment tools
- fastening devices include: bolts, clips
| Reference Code | Learning Outcomes | Learning Objectives |
|---|---|---|
| B-8.03.01L | demonstrate knowledge of components, their characteristics, applications and operation | identify components, and describe their characteristics and applications |
| identify fastening devices, and describe their characteristics and applications | ||
| interpret information pertaining to components found on drawings and specifications | ||
| identify assembly constraints | ||
| identify isometric and orthographic views and sketching techniques for assembly plan | ||
| identify material allowances for bending, braking and rolling | ||
| B-8.03.02L | demonstrate knowledge of procedures to assemble components | identify tools and equipment used to assemble components, and describe their procedures for use |
| identify hazards, and describe safe work practices pertaining to assembling components | ||
| describe procedures to assemble components | ||
| B-8.03.03L | demonstrate knowledge of regulatory requirements pertaining to assembling components for pressure vessels | identify codes, standards and regulations pertaining to assembling components for pressure vessels |
Range of Variables
- fastening devices include: bolts, clips
- assembly constraints include: building size, equipment limitations
- tools and equipment include: hi-lo gauges, wedges, clamps, sawhorses, jigs and fixtures, cranes, slings, alignment tools
- hazards include: pinch points, burns, debris