Transcription of Use Caution When Specifying “Seal Welds” - Foundation
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Use Caution When Specifying “Seal Welds” - Foundation
Welding Innovation Vol. XVI, No. 2, 1999 Use Caution When Specifying seal Welds Practical Ideas for the Design Professional by Duane K. Miller, , FileIntroductionWhat is a seal weld ? AWS , Standard WeldingTerms and Definitions, defines a seal weld as: Any welddesigned primarily to provide a specific degree of tight-ness against leakage. The purpose of a seal weld maybe to contain a fluid either gaseous or liquid. In themechanical and structural fields, seal welds are used mostoften not to prevent leakage out of a container, but to pre-vent entry of a fluid into a space where some type ofharmful behavior, often corrosion, is expected to occur. Inthese fields, seal welds are frequently used to precludemoisture and oxygen-laden air and water from enteringthat welds may be specified on parts to be galvanized toprohibit pickling acids and/or liquid zinc from entering into aspecific region. For architecturally exposed steel that is tobe painted, seal welds may be specified to prevent unsight-ly rust bleeding.
Welding Innovation Vol. XVI, No. 2, 1999 Use Caution When Specifying “Seal Welds” Practical Ideas for the Design Professional by Duane K. Miller, Sc.D., P.E.
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