Various codes and specifications require that the welding procedures for a process be proven to give satisfactory welds by prescribed tests. In addition the governing code may require that the welder be proven by test as qualified for the job. Houston Valve and Testing Company maintains welding procedure specifications, procedure qualification records, and welder qualification test records to section IX of the Boiler and Pressure Vessel Code of the American Society of Mechanical Engineers, for all welding done routinely in our plant. Any special requirements of our customers can be met by qualifying the procedure to any other code. Two of the most widely used procedures, tests, and welder qualifications are shown in Figures 8 through 13, as an example. Any other documents can be provided upon request.


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