19. Source Inspection
19.1 If the purchaser elects to make an inspection of the
castings at the producer’s works, it shall be so stated in the
contract or order.
19.2 If the purchaser elects to have an inspection made at
the producer’s works, the producer shall afford the inspector all
reasonable facilities to satisfy him that the material is being
furnished in accordance with this specification. All tests and
inspections shall be so conducted as not to interfere unnecessarily
with the operation of the works.