Installation, Operation & Maintenance Manual
14
Top-Transfer 2" Angle Valves A-720, A-721, A-721-B and A-724 Series
NOTICE
WARNING
NOTICE
5.1.9
Special Inspection Considerations
5.1.9.1
Previous procedures may not cover all conditions encountered in the field. Therefore, it is the responsibility of the repair agency
to obtain approval from Midland for inspection, evaluation, repair and maintenance procedures not covered herein.
5.1.9.2
Facilities performing recommended dye-penetration and magnetic-particle testing must carry out such testing according to a
qualified procedure conducted by certified trained personnel.
5.1.9.3
Evaluation of critical component metal surfaces of the valves after cleaning, inspection and specialized testing performed by
agencies other than the repair facility are the responsibility of the repair facility
5.1.9.4
Where numerical tolerances cannot be provided, the disposition of the internal integrity and surface quality of parts is under
the jurisdiction of the repair facility and dependent on its experience and judgment.
NOTICE:
Repair work is limited to cleaning and polishing.
WARNING: Machining Not Allowed
. Without consent from the valve manufacturer or car owner, machining,
grinding, welding or other alterations to the valve seat or stem seat is not allowed per AAR M1002,
Paragraph A3.11.1 of the Tank-Car Specifications.
NOTICE:
Please refer to paragraph A3.11.2 of the Tank-Car Specifications and consult
Appendix E for dimensions and applicable tolerances.
