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However some Qualifications are only valid for a single project, while others are unlimited as long as welders do not go beyond a specified length of time without performing that specific type of welding (this period is typically 6 months). Welders must maintain a log to demonstrate they have maintained their Qualifications.
The Canadian Welding Bureau, through CSA Standards W47.1, [3] W47.2 [4] and W186, [5] specifies both a WPS and a Welding Procedure Data Sheet (WPDS) to provide direction to the welding supervisor, welders and welding operators. The WPS provides general information on the welding process and material grouping being welded, while the WPDS ...
Machinery joint welding AWS D14.5: Press welding AWS D14.6: Rotating Elements of Equipment AWS D14.9 Specification for the Welding of Hydraulic Cylinders AWS D15.1: Railroad welding AWS D15.2: Railroad welding practice supplement AWS D16.1: Robotic arc welding safety AWS D16.2: Robotic arc welding system installation AWS D16.3
This is a list of welding processes, separated into their respective categories. The associated N reference numbers (second column) are specified in ISO 4063 (in the European Union published as EN ISO 4063 ). [ 1 ]
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Duty cycle is a welding equipment specification which defines the number of minutes, within a 10-minute period, during which a given arc welder can safely be used. For example, an 80 A welder with a 60% duty cycle must be "rested" for at least 4 minutes after 6 minutes of continuous welding. [8]
American Welding Society ATFs are listed on the official AWS website and advertised in the American Welding Society's Welding Journal magazine. The ATF program requires that a facility implements a quality assurance program that meets the requirements established in the AWS QC4-89, Standard for the Accreditation of Testing Facilities. [ 5 ]
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