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Rules for inspection of cryogenic valves

1. Inspection Items

1.1 The inspection could be divided intro delivery inspection and type test.

1.2 Inspection items, inspection categories according to the provisions of the table 1.

2. Delivery Inspection

The valve shall be carried out each by each for factory inspection and qualified then could be shipped out.

3.Type Test

3.1 With One of the following circumstances, the valves shall be made for type testing firstly then batch production after qualified.

New product trial custom type;

It might affect the products performance for great changes of products structure,material and process after production.

3.2 Technical agreement requirements for type testing, the sampling testing shall be carried out.

Sampling inspection from the production line of terminal products randomly,or from the finished-products or selected randomly from the factory products without putting into operation that had been supplied to end users.Quality inspection for whole series of products,2 or 3 typical specification products shall be selected for testing according to the products range and dimensions.

3.3 Type testing of all test items shall comply with the provisions of the table 1.

Table 1 inspection items, technical requirements and test methods