Welding procedure qualification welder is used to assess the implementation of the welding unit, capable of welding the welded joints are required to comply with the boiler safety technology to monitor the procedures and products technical conditions, verify whether the instructions of the welding process of welding units to develop appropriate is an important basis for the assessment of factory production boiler capacity. Strict management of the welding procedure qualification is very necessary, qualified welding procedure qualification report should be used as the basis for the preparation of the welding process file. The general program of the welding procedure qualification:
Welding procedure qualification task books by welding engineers according to the requirements of the product design, audited by welding responsibility engineers, quality assurance engineers approval is issued for implementation.
According to the welding procedure qualification task books prepared by the welding engineer welding procedure qualification instructions after welding responsibility engineer audit, implementation of the by welding test group organizations.
The welding specimen preparation: the specimen material and the structure of the product are the same, and the same groove pattern, and the size of the test piece, the specifications according to the relevant standards. Appearance, nondestructive testing, mechanical properties test specimen after welding.
Welding Accessories and process equipment ready: the actual welding procedure qualification welding equipment and process equipment and production should be the same.
Welders ready: welder welding procedure qualification shall be the unit holder in period and skilled welders, welding procedure qualification task books requires the welding, the specimen does not allow assessment rework.
Summary: after welding the responsibility engineer audit compliance, cross-technology department head countersigned and then fill in the welding procedure qualification report approved by the Quality Assurance Engineer, after the entry into force as the basis for development of the welding process. If the assessment is unqualified, shall amend its process to re-assess until qualified so far.
Boiler welding process is a key factor in quality control of welded joints, is the preparation of the welding process based on product features, types of performance before welding welding, Welding Materials, welding products workpiece thickness and joint type.
Qualified welding procedure qualification based on the assessment, development of welding procedure to guide the welding production. Boiler manufacturer of welding procedure qualification project should be qualified welding procedure qualification, table of contents and the welding procedure qualification report is timely provided to the mill supervision officers seized.
Supervisory inspector welding procedure qualification project audit boiler products welded joints coverage to meet the production needs of the boiler, the supervisory inspector found that the thickness of the welding procedure qualification can not meet the new boiler welded joints requirements, supervisory inspector should be raised , when necessary, to form the supervisory inspection contact list, to inform the process of the boiler plant inspection department must supplement the welding procedure qualification.