Page 267 - Water Standards
P. 267
Table 4 2 12-2 (Continue)
No Item Allowable error Explanation
Valve body levelness and
4 1 0mm/ m —
verticality
Valve body composite Meet requirements of Item 10
5 —
joints of Article 4 2 2
Gap between the valve and
6 Meet design requirements —
valve body
Gap between working and
7 No larger than 0 05mm —
maintenance seals
No less than 80% of the
8 Sealed cap stroke design value, the movement —
shall be flexible
Water leakage after holding 30
Tightness tests in still
9 min shall be no larger than the —
water
design value
3 Expansion joint installation shall meet the following requirements:
1) The gap between an expansion joint s inner and outer casing shall be adjusted to
be uniform and have no blockage.
2) The expansion distance of the inner and outer casings shall meet the design re⁃
quirements. The deviation should not be larger than ±6mm and shall consider the
amount of the pipe union welding shrinkage.
4 2 13 Electrical tests of turbine⁃generator shall meet the following requirements:
1 The items and requirements of stator installation tests shall meet the provisions of Ta⁃
ble 4 2 13-1
2 6 0