WIS5 CN 2013 Appendices 1

7/17/2019 WIS5 CN 2013 Appendices 1

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TWI 02 Training Acceptance Levels for Plate, Pipe and Macro

D = depth L = length H = height t = thickness

Acceptance levels plate and pipe

Acceptance

levelsmacro only

Remarks Maximum allowance Remarks

1 Excess weld

metal

At no point shall the excess weldmetal fall below the outside

surface of the parent material. All

weld runs shall blend smoothly.

Excess weld metal will not exceed H = 3mm inany area on the parent material, showing

smooth transition at weld toes. As for plate and pipe

2Slag/silicainclusions

Slag inclusions are defined asnon-metallic inclusions trapped in

the weld metal or between theweld metal and the parent

material.

The length of the slag inclusion shall notexceed 20mm continuous or intermittent.

Accumulative totals shall not exceed 50mmSlag not permitted

3 Undercut

Undercut is defined as a grovemelted into the parent metal,

at the toes of the weld excessmetal, root or adjacent weld

metal.

No sharp indications Smooth blend required.The length of any undercut shall not exceed

20mm continuous or intermittent. Accumulativetotals shall not exceed 50mm. Max D = 2mm

for the cap weld metal.Root undercut not permitted.

No sharp indicationsSmooth blend required

4Porosity or

Gas Cavities

Trapped gas, in weld metal,elongated, individual pores,cluster porosity, piping or

wormhole porosity.

Individual pores 1mm max.Cluster porosity maximum 20

2mm total area.

Elongated, piping or wormholes15mm max. L continuous or intermittent.

Cluster porosity notpermitted. Individuelpores acceptable,max 3 indications

5Cracks or

Laminations

Transverse, longitudinal, star or

crater cracks.Not permitted Not permitted

6 Lack of fusion

Incomplete fusion betweenthe weld metal and base

material incomplete fusion

Surface breaking lack of side wall fusion,lack of inter-run fusion continuous or

intermittent not to exceed 35mm Accumulative Not permitted

T a b l e n u m

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MATERIALS JOINING

TECHNOLOGY



MATERIALS JOINING

TECHNOLOGY



MATERIALS JOINING

TECHNOLOGY

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Documents

WIS5 CN 2013 Appendices 1