The implementation standards of American standard flanged ball valves are generally API and ANSI, and the different standards for specific models are also different. For example, the design and manufacturing standards of split American standard flanged ball valves are based on API 608, and the structural length standard is based on ANSI B16.10. , while the design and manufacture standards and structural length standards of the fixed American standard flanged ball valve are in accordance with API 6D.

    The American Standard flanged ball valve quality certification standard system is mainly reflected in the following aspects:

    1. The valve manufacturer establishes a quality management system in accordance with IS09001 "Quality Management System Certification", and strictly limits the qualifications of valve secondary suppliers.

    2. The qualifications of third-party valve quality certification agencies are specified, and the materials to be submitted for valve quality certification and the valve product selection principles are determined.

    3. Compared with the domestic standard, the inspection of the appearance of the valve and the mechanical performance test of the American standard valve material are more strict and meticulous.

    4. In addition to conventional inspection methods such as pressure test and non-destructive testing, special inspections such as valve closing ability test, connection strength test of valve stem and closing parts, and valve handwheel performance test are also carried out.

    5. For example, American standard flanged ball valves will be checked to confirm whether they contain radioactive substances and dangerous chemical substances before maintenance.

    6. Established the bottom requirements criteria that valves and components should meet to confirm whether they can continue to be used or repaired.

    Related recommendation: The difference between the structural length of the American standard flanged ball valve and other standards