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There are very few restrictions as to size and strength of material. If a fabricator wants to use a material that is not listed in the table, a procedure must be qualified by testing and with a written PQR.ĪSME materials are listed by "P" and "S" numbers. Each material list shows matching electrode, and filler metal, to be used to establish prequalified procedures. Group II lists materials at 36 KSI to 80 KSI. Group I lists the lowest-yield-strength materials from 30 KSI to 46 KSI. Although the groups reflect a somewhat ascending alignment as to the yield strength, there are instances of overlapping within three of the four groups. These materials are listed in groups that are assigned Roman numerals. The prequalification Section 3 of AWS D1.1 lists materials for prequalifying the WPS. Materials for Prequalification by AWS D1.1 This code, generally used for buildings and support structures, is useful for fabricating and erecting any welded structure. The maximum yield strength addressed is 100 KSI. The minimum thickness addressed is 1/8 in.
AWS D1 1 2010 ESPAÑOL PDF GRATIS CODE
The AWS D1.1 code qualification is specifically for carbon and low-alloy metals. In some cases, the test coupons may be radiographed in lieu of destructive These tests consist of guided bends, breaking of fillet welds, and macroetching. It includes qualification of the range of base materials, weld materials, positions, and so forth. The welder qualification test record (WQTR) comprises the results of a test to prove that a welder is qualified to weld to a certain WPS. AWS D1.1 also requires nondestructive testing for procedure qualification.
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Destructive testing (tensile pulls, bends, etc.) is required for PQRs in all codes. The procedure qualification record (PQR) is a record of test results for the welds made in accordance with the WPS. It also depicts the joint design and welding materials, parameters, and technique and code requirements. The welding procedure specification (WPS) is a document that is intended to provide direction for the welder.
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The basic contents of a procedure qualification are the same in both programs. Choosing a specific code when one is not specified in the contract often involves a fine line. If the job is related to ductwork associated with a boiler, the contract usually allows qualification with either code. If the job entails pressure vessels or piping, the ASME Boiler and Pressure Vessel Code must be used. If the job consists totally of structural welding and the contract specifies the AWS Structural Code, then that is the code that must be used for all aspects of the job. Some work contracts require that a specific code be used for qualifying the welders, but in many cases either code is sufficient. A "code of construction," such as ASME Section VIII, Division I, must be used in conjunction with Section IX for fabrication. ASME is specifically for welder and welding procedure qualification. The most obvious difference between ASME Section IX and AWS D1.1 is that D1.1 addresses fabrication, erection, inspection, and welder and welding procedure qualification. We all have heard that ASME codes are more stringent than AWS codes and vice versa. Committees and subcommittees comprising volunteer workers interested in furthering the quality and efficiency of the welding industry work together to develop these codes. Strengthening and Repairing Existing Structures (Noġ2.The most commonly used codes for qualifying welders are the American Society of Mechanical Engineers (ASME) Section IX and American Welding Society (AWS) D1.1. Tubular Structures (No Applications within this code)ġ1. Welded Steel Bridges (The provisions of this clause inĪNSI/AASHTO/AWS D1.5-96 were distributed throughoutĪASHTO/AWS D1.5M/D1.5:2002 and remain so for thisġ0. Statically Loaded Structures (No Applications withinĩ.