CSWIP 3.1 Practical Pipe Examples EBOOK

CSWIP 3.1 Welding Inspection

Practical Pipe Inspection TWI Training & Examination Services Course Reference WIS 5 Course notes section reference 23 World Centre for Materials Joining Technology

Copyright © 2006, TWI Ltd

Pipe Inspection

World Centre for Materials Joining Technology


Hi – Low & Root gap Measurements 1 2 3 4

5

Root gap dimension

HI-LO Single Purpose Welding Gauge

6

Internal alignment



Pipe Inspection Examination Remember in the CSWIP 3.1 Welding Inspectors examination your are required to conduct a practical examination of a pipe test weld, complete a thumb print sketch and a final report on your findings

 Time allowed 1 hour and 45 minutes  Use your own code i.e. API 1104



Pipe Inspection Points 1) Use a pencil for the arrow lines, but make all written comments and measurements in ink only 2) Report everything that you can observe 3) Do not forget to compare and sentence your report 4) Do not forget to date & sign your report 5) Make any observations, such as recommendations for further investigation for crack-like imperfections. World Centre for Materials Joining Technology


Pipe Inspection Examination After you have observed an imperfection and determined its type, you must be able to take measurements and complete the thumb print report sketch The first thumb print report sketch should be in the form of a repair map of the weld. (i.e. All observations are Identified Sized and Located) The thumb print report sketch used in CSWIP exam will look like the following example.



Pipe final Inspection Report After you have completed your thumb print report sketch of your test pipe the next step is to complete your final report again the report must be completed in ink (no pencil). The report must be completed to your thumb print sketch, do not leave any boxes empty, every box must be completed or dashed out. You must also make any comments you feel are necessary regarding any defects observed. The report form used in CSWIP will look like the following example. World Centre for Materials Joining Technology


Outside Dia & thicknes

process Welding process:

EXAMPLE PIP Signature: I C

98 60

C

40

5

Arc Strike

25

A

API 1104 B

12 8

15

120

Slag

Cap height : 3mm. Weld width: 12-14mm Toe blend: Poor. Misalignment(HI-LO): 2mm Spatter or scale on the pipe surface Lack of side wall fusion

38

Toe blend: Poor. Misalignment (HI-LO): 1mm Spatter or scale on the pipe surface

Slag inclusion

C

NOTES:

Page 1 of 3

>1.0 mm Cap height : 4mm. Weld width: 12-14mm

Welding position: Flat /PA

Under fill

DCode/Specification used:

Undercut

180

10

90

15

20

Lack of side wall fusion

46 Name: [Block capitals] Mr. I C Plenty

8

Under fill

A

140

Lack of side wall fusion

Arc Strike

WELD FACE

Cap height : 4mm. Weld width: 12-14mm Toe blend: Poor. Misalignment (HI-LO): 2mm Spatter or scale on the pipe surface

Cap height : 5mm. Weld width: 12-14mm Toe blend: Poor. Misalignment(HI-LO): 1mm Spatter or scale on the pipe surface



PIPE ROOT FACE

>1.0 mm

Penetration height : 5mm. Misalignment (HI-LO): 1mm Scale on the pipe surface

C

6 60

46

Excess penetration 5mm

Poor stop start

5

180

Undercut

Penetration height : 3mm. Misalignment (HI-LO): 2mm Spatter on the pipe surface

A

8

38

D

Lack of root fusion

120

120

C

NOTES:

10

Lack of root penetration

90

15

20

A

B

40

Burn through

8

140

Lack of root fusion

Smooth Undercut <1.0mm Penetration height: 2mm. Misalignment (HI-LO): 2mm Spatter on the pipe surface


Penetration height: 3mm. Misalignment (HI-LO): 1mm Scale on the pipe surface


Pipe final Inspection Report PRINT FULL NAME SPECIMEN NUMBER EXTERNAL DEFECTS

Defect Type

I C Plenty 001 Defects Noted

Accumulative Total 2

Code or Specification Reference

Maximum Allowance 3

Section/ Table No 4

Accept/Reject 5

Excess weld metal height

4mm

1.6mm

7.8.2

Reject

Excess weld metal appearance

Poor blend

Smooth

7.8.2

Reject

Incomplete filling

22mm

None

7.8.2

Accept

Inadequate weld width (PIPE)

N/A

3mm

7.9.2

Accept

Slag Inclusions

70mm long

None

7.8.2

Reject

Undercut

1.5mm depth

0.8mm

9.7.2 Table 4

Reject

Surface Porosity

1.5mm ∅

2mm ∅

9.3.9.3

Accept

Cracks/Crack-like defects

40mm

NONE

9.3.10

Reject*

Lack of fusion

22mm

25mm

9.3

Accept

Arc strikes

30x25

------------

Not specified

Mechanical damage

NONE

------------

-----------

Accept

Laps/Laminations

NONE

------------

-----------

Accept

Misalignment (Linear)

2mm

3mm

7.2

Accept

Longitudinal seams (PIPE)

N/A

------------

----------

Accept


Reject**


Pipe final Inspection Report Root EXTERNAL DEFECTS

Defects Noted

Defect Type

Accumulative Total 2

Code or Specification Reference Maximum Allowance 3

Misalignment

2mm

3mm

Excessive Root Penetration

4mm

------------

Incomplete Root Penetration

50mm

Lack of Root Fusion

Section/ Table No 4

Accept/Reject 5

7.2

Accept

Not specified

Accept

25mm

9.3.1

Accept

20mm

25mm

9.3.4

Accept

Root Concavity

2mm depth

1mm

9.3.6

See Notes ***

Root Undercut

0.5mm

0.8mm

9.3.11

Accept

Cracks/Crack-like defects

NONE

------------

9.3.10

Accept

Slag inclusions

70mm long

None

7.8.2

Reject

Porosity

1.5mm ∅

2mm ∅

9.3.9.3

Reject

Laps/Laminations

NONE

------------

----------

Accept

This *pipe/plate has been examined to the requirements of code/specification API 1104................. and is accepted/rejected accordingly. Comments: * Request MPI testing. ** Recommend arc strikes are ground flush prior to MPI testing for cracks. *** Radiography Required Signature

2003

I C Plenty

*Delete which is not applicable.

Date

22nd August Use the other side for any comments.



Pipe Code API 1104 Reinforcement Height:

Misalignment:

7.8.2

Longitudinal seams: Not referenced

page 20 Reinforcement Appear:

Excess penetration: Not referenced

7.8.2

Lack of penetration: 9.3.1/9.3.2 page 21

page 20 Incomplete groove:

7.8.2

Inadequate weld width:

page 20

7.8.2

page 20 Slag inclusions:

7.2 page 19

7.8.2

Lack of root fusion: 9.3.4 page 22 Concave root:

9.3.6 page 22

Burn through:

9.3.7 page 22

page

20 Undercut:

9.3.11

page 24 Porosity:

9.3.9



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CSWIP 3.1 Practical Pipe Examples EBOOK

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