AWS C2.21M-C2.21:2015 pdf download.Specification for Thermal Spray Equipment Performance Verification
1.1 Scope. This standard describes the essential elements of a procedure to verify performance of equipment and systems used for thermal spraying. These equipment and systems include the thermal spray gun, gas console, control apparatus,and feedstock supply system. Other external systems and apparatus such as a gas or fuel management system, sound abatement, dust collection, automation, fire suppression, and finishing systems are beyond the scope of this document.
This specification does not address all of the thermal spray process variations or equipment configurations. However, the principles presented may be a starting point for establishing a customized verification procedure.
It is not the intent of this standard to address process validation; to ensure a process is producing, or capable of producing,desired coatings. This specification does not address all of the essential process variables necessary for thermal spray process qualification. This specification does not address equipment design standards, provisions, requirements, codes, or regulations that may apply to the thermal spray equipment or its installation.
The standard can be applied at the time of installation and any other times or intervals the User deems appropriate to ensure the equipment is capable of operating to the manufacturer' s specifications or other specifications deemed applicable by the User.
1.2 Units of Measure. This standard makes use of both the International System of Units (SI) and U.S. Customary units.The latter are shown within brackets ([ ]) or in appropriate columns in tables and figures. The measurements may not be exact equivalents; therefore, each system must be used independently.
1.3 Safety. Safety and health ssues and concerns are beyond the scope of this standard; some safety and health information is provided, but such issues are not fully addressed herein.
4. Performance Verification Procedure
This standard establishes objectives, requirements, and procedures to verify specified thermal spray equipment performance. Appropriate application of this standard allows the User to minimize the risk of undetected equipment problems or variations which may affect its reliability, consistency, or safe use. The principle elements of the performance verification activity are: definition of the scope of work, establishing the timing, execution of the procedure, and documentation of the results.
4.1 Scope ofWork. The principle reason for performance verification is to ensure the thermal spray equipment can operate within the established specifications. However, there can be a wide range of expectations for the verification procedure and they can have a great impact on the verification effort and cost, as well as the production availability of the equipment. The scope of work, including the performance verification requirements, procedures, acceptance criteria, and responsibilities of the parties, shall be clearly defined.AWS C2.21M-C2.21 pdf download.