Mechanical Testing - Impact Test

Before looking at impact testing let us first define what is meant by 'toughness' since the impact test is only one method by whic...

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Mechanical testing - Tensile Test

Mechanical testing is carried out to produce data that may be used for design purposes or as part of a  material joining procedure or oper...

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Wormholes / Crater Pipe

Elongated pores or wormholes Characteristically, wormholes are elongated pores (Fig. 3) which produce a herring bone appearance on the r...

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Porosity - Weld Defects

The characteristic features and principal causes of porosity imperfections are described. Best practice guidelines are given so welders ca...

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API ICP Computer-based testing launches in 2014

Starting in March 2014, the American Petroleum Institute Inspector Certification Program (API ICP) changed its examination delivery method...

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Geometric Shape Imperfections

This article looks at those imperfections related to poor geometric shape and will concentrate on the following: Excess weld metal   ...

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Root Concavity - Suck Back

A shallow groove that may occur in the root of a butt weld. Common causes Root concavity is caused by shrinkage of the weld pool in t...

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