Page 267 - Water Standards
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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  













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