Plastics welding personnel — Qualification testing of welders — Thermoplastics welded assemblies

Sub-group

2.2

3.2

1

Welding of test pieces

- weld edge preparation

- component alignment

-welding rod (type, conditions, pretreatment

- equipment (conditions, setting)

- equipment control measurement

. extrudat temperature

. gas flow rate

. gas temperature

. extrudat output

. welding speed

- equipment handling (wed start, weld end)

- welding record

Evaluation

2

Visual examination:

- root defects (notches, cavities...)

- homogeneity : shape, evenness of weld

- lateral breakout/welding shoe guidance

-joint coverage/edge welding

- heat effect/heating width/overheating

Evaluation

3

mechanical-technological examination:

- minimum bending angle (required

- bending angle (actual value)

Evaluation of bend test^a

Result

^a if required

Type of product: Sheet

Dimensions: e_n = mm

Pipe d_n= mm

e_n = mm

SDR

Sub-group

1.3

2.3

2.4

2.5

3.3

3.4

3.5

4.2

4.3

5.2

1

Welding of test pieces

- base material (type, conditions)

- weld edge preparation

- component alignment

- ovality

- choice of weld parameters

- equipment (conditions, setting, control measurement)

- equipment handling

- welding record

Evaluation

2

Visual examination:

Weld beads

- shape

- height/width

- surface

- notch between weld bead

- misalignment

- evenness of weld

- defect in cross-section

Evaluation

3

mechanical-technological examination:

- tensile test

- short term tensile welding factor f_s (required)

- short term tensile welding factor f_s (actual)

Evaluation of welding factor^a

- minimum bending angle (required

- bending angle (actual value)

Evaluation of bend test^a

Result

^a if required