What type of porosity usually occurs with an orientation perpendicular to the weld face?

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Study for the CSA Welding Inspector Certification Test (W178.2) Level 1. Use flashcards and multiple choice questions with hints and explanations. Prepare for your certification!

Multiple Choice

What type of porosity usually occurs with an orientation perpendicular to the weld face?

Explanation:
Piping porosity is the type that forms as elongated, pipe‑like voids that run perpendicular to the weld face. This vertical orientation happens as gas becomes trapped and creates a continuous, tubular cavity that extends through the weld metal from the surface inward. It’s distinct from other porosity forms: gas porosity is usually round or spherical and scattered within the weld; crater porosity occurs at the end of the weld crater; laminar porosity consists of parallel, layered pores. Because the question specifies porosity oriented perpendicular to the weld face, piping porosity best fits that description.

Piping porosity is the type that forms as elongated, pipe‑like voids that run perpendicular to the weld face. This vertical orientation happens as gas becomes trapped and creates a continuous, tubular cavity that extends through the weld metal from the surface inward. It’s distinct from other porosity forms: gas porosity is usually round or spherical and scattered within the weld; crater porosity occurs at the end of the weld crater; laminar porosity consists of parallel, layered pores. Because the question specifies porosity oriented perpendicular to the weld face, piping porosity best fits that description.

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