WELDING WORKBOOK
Datasheet 331
Welding Application Nomenclature
Backstep Sequence: A longitudinal sequence in which weld passes are made in the direction opposite to the progress of welding — Fig. A. Block Sequence: A combined longitudinal and cross-sectional sequence for a continuous multiple-pass weld in which separated segments are completely or partially welded before intervening segments are welded — Fig. B. Cascade Sequence: A combined longitudinal and crosssectional sequence in which weld beads are made in overlapping layers — Fig. C. Cross-Sectional Sequence: The order in which the weld passes of a multiple-pass weld are made with respect to the cross section of the weld — Figs. D, E. Boxing: The continuation of a fillet weld around a corner of a member as an extension of the principal weld — Fig. F. Intermittent Weld: A weld in which continuity is interrupted by recurring unwelded spaces — Figs. G, H, I. Chain Intermittent Weld: An intermittent weld on both sides of a joint in which the weld segments on one side are approximately opposite those on the other side. Figure G shows a chain intermittent fillet weld. Staggered Intermittent Weld: An intermittent weld on both sides of a joint in which the weld segments on one side are alternated with respect to those on the other side. Figure H shows a staggered intermittent fillet weld. Figure I shows an intermittent seam weld.
A
D
E
F B
G
C
H
I
Excerpted from AWS A3.0M/A3.0:2010, Standard Welding Terms and Definitions. 70 APRIL 2012
Table of Contents for the Digital Edition of Welding Journal - April 2012