1. TWI
Welding Inspection
Duties/Terms
Course Reference WIS 5
M.S.Rogers

2. CSWIP Examinations Level 1: 3.0 Visual Welding Inspector
TWI
CSWIP Examinations
Level 1: 3.0 Visual Welding Inspector
Level 2: 3.1 Welding Inspector
Level 3: 3.2 Senior Welding Inspector
M.S.Rogers

3. CSWIP Examination Requirements
TWI
CSWIP Examination Requirements
Theory part A2: General welding theory & product technology 30 multiple-choice questions.
Theory part B2: Specific welding technology. 4 questions from 6.
Oral: Specific oral based on nominated code
Practical part A2: Inspection of a plate butt weld
Practical part B2: Inspection of a pipe butt weld
Practical part C2: Inspection of a set of destructive test samples, two macros test to ISO 5817
M.S.Rogers

4. Main Responsibilities
TWI
Main Responsibilities
Code compliance
Workmanship control
Documentation control
M.S.Rogers

5. Personal Attributes Honesty Integrity Knowledgeable Good communicator
TWI
Personal Attributes
Honesty
Integrity
Knowledgeable
Good communicator
Physically fit.
M.S.Rogers

6. Duties of a Welding Inspector
TWI
Duties of a Welding Inspector
Before Welding.
before assembly.
after assembly.
During welding.
After welding.
M.S.Rogers

7. Duties Before Welding Check all documentation Check all consumables
TWI
Duties Before Welding
Check all documentation
Check all consumables
Check materials, dimensions and condition
Preheating, method and temperature
Check fit and set-up.
Ensure no undue stress is applied to the joint
Check welding equipment
M.S.Rogers

8. During Welding Check amperage, voltage, polarity
TWI
Check amperage, voltage, polarity
Ensure the correct technique, run sequence.
Check run out lengths, time lapses.
Cleaning between passes
Interpass temperatures
Consumable control
Maintenance of records and reports
M.S.Rogers

9. After Welding Post cleaning
TWI
After Welding
Post cleaning
Visual inspection of completed welded joint
Check weld contour and with
PWHT
Dimensional accuracy
Weld reports
Tie up with NDT
Monitor any repairs
M.S.Rogers

10. Welding Inspectors Equipment
TWI
Measuring device e.g flexible tape, steel rule
Temperature indicating crayons
Welding gauges e.g. TWI multi-purpose gauge
Voltmeter
Ammeter
Magnifying glass
Torch/flash light
M.S.Rogers

11. TWI Multi-purpose Welding Inspectors Gauge60 50 40
1/4
1/2
3/4 1 5 10 15 20 IN MM 60 50 40
1/4
1/2
3/4 1 5 10 15 20 IN MM
Angle of preparation
The scale reads from 0o to 60o in steps of 5o. The angle is read against the chamfered edge of the segment
Misalignment
The scale is used to measure misalignment of components by placing the edge of the gauge on the lower one and rotating the segment until the pointer contacts the higher piece
M.S.Rogers

12. TWI Multi-purpose Welding Inspectors Gauge60 50 40
1/4
1/2
3/4 1 5 10 15 20 IN MM
1/4
1/2
3/4 1 5 MM IN MM
1/2 10 MM 15 20 15 40 50 60
Undercut
The scale reads from 0 in the negative up to 5m. The segment is rotated until the pointer reaches the full depth of the undercut.
Excess weld metal
The scale is used to read off these dimensions up to a maximum of 25mm and 1 inch
M.S.Rogers

13. TWI Multi-purpose Welding Inspectors Gauge60 50 40
1/4
1/2
3/4 1 5 10 15 20 IN MM 60 50 40
1/4
1/2
3/4 1 5 10 15 20 IN MM
Fillet weld leg length
The scale is used to read off these dimensions up to a maximum of 25mm and 1 inch.
Fillet throat thickness
The sliding pointer reads up to 20mm and 3/4 inch. In measuring throat thickness it is assumed that the fillet weld has normal root penetration
M.S.Rogers

14. HI-LO Single Purpose Welding Gauge
TWI
HI-LO Welding Gauge
HI-LO Single Purpose Welding Gauge 1 2 3 4 5 6
Internal alignment
Root gap dimension
M.S.Rogers

15. TWI
Amp/Volt Meter
M.S.Rogers

16. Terminology Joint Types
TWI
Edge
Corner
Lap
Tee
Butt
Cruciform
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17. Terminology Joint Welds
TWI
Terminology Joint Welds
Compound
Fillet
Butt
Spot
Edge
Plug
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18. Types of Joint Preparation
TWI
Types of Joint Preparation
Included angle
Included angle
Angle of
bevel
Root
Radius
Root Face
Root Face
Root Gap
Root Gap
Single -V Butt
Single - U Butt
M.S.Rogers

19. Types of Joint Preparation
TWI
Types of Joint Preparation
Angle of
bevel
Angle of
bevel
Root
Radius
Root Face
Root Face
Root Gap
Root Gap
Land
Single Bevel Butt
Single J Butt
M.S.Rogers

20. Weld Zone Terminology Heat affected zone Weld Junction Weld zone
TWI
Weld Zone Terminology
Weld zone
Weld metal
Heat affected
zone
Weld Junction
Fusion zone
Root
M.S.Rogers

21. Excess root penetration
TWI
Butt Weld Features
Weld cap width
Excess cap height
Excess root penetration
Root bead width
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22. Fillet Weld Features Weld face Vertical leg length
TWI
Fillet Weld Features
Weld face
Vertical leg length
Design throat thickness
Horizontal leg length
M.S.Rogers

23. BS 499: part 2. Welding Symbols Dimensions
TWI
BS 499: part 2. Welding Symbols Dimensions
a = Actual throat thickness
z = Design throat thickness
b = Leg length
b = Material thickness
z = 0.7 of b z a b
M.S.Rogers

24. Fillet Weld Profiles Mitre fillet Convex fillet Concave fillet TWI
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25. Horizontal vertical position
TWI
Welding Positions
Flat position
UK (USA): 1G
ISO/EN: PA
UK (USA) 1G rotated
ISO/EN PA
Horizontal vertical position
UK (USA): 2G
ISO/EN: PC
UK (USA) 2G Fixed
ISO/EN PC
M.S.Rogers

26. Welding Positions Vertical up Vertical down UK (USA) 3G UK (USA) 3G
TWI
Welding Positions
UK (USA) 3G
ISO/EN PF
Vertical up
Vertical down
UK (USA) 3G
ISO/EN PG
UK (USA) 5G
ISO/EN PF, PG
Vertical Position
Pipe fixed Horizontal
UK (USA) 4G
ISO/EN PE
Overhead Position
M.S.Rogers

27. Inclined position fixed Inclined position Rotated
TWI
Welding Positions
45o
45o
Inclined position fixed
UK (USA) 6G
EN/ISO H-LO45
Inclined position Rotated
UK (USA) 1FR
EN/ISO L 45/PA
M.S.Rogers