Page 17 - Quick Guide to Welding and Weld Inspection by S.E. Hughes, Clifford Matthews

A Quick Guide to Welding and Weld Inspection

WI: welding inspector
WM: weld metal
WPS: welding procedure specification

Common terms
Longitudinal direction: along the length of the weldment
(parallel to the weld)
Transverse direction: along the width of the weldment
(perpendicular to the weld)
Short transverse direction: through the weldment thickness
Weldment: the combined weld, HAZ and
base metal
Fusion weld: a weld produced by joining
materials in a molten state
Yield point: the point at which plastic
deformation starts in a material
Joint terminology
Before welding takes place the parts to be joined must be
prepared and arranged into the required form. The most
common forms of joint are butt (or groove) joints, T joints
and lap joints. Butt joint members are fitted edge to edge, T
joints are fitted edge to surface and lap joints are fitted
surface to surface (see Fig. 1.1).
Weld terminology
Types of weld used on the joints are butt (or groove) welds,
fillet welds, edge welds, plug welds and spot welds. The type

Figure 1.1 Common joint forms

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Woodhead Publishing Ltd – A Quick Guide to Welding and Weld Inspection
Data Standards Ltd, Frome, Somerset – 17/9/200901QG Welding chap1.3d Page 2 of 16