5.2　Load and action

5.2.1　The design load of the equipment shall include the following contents：

1　Internal pressure，external pressure or maximum pressure difference；

2　Hydrostatic pressure under working and testing conditions；

3　The weight of the internals，packing and equipment，the gravity load of the internal medium under normal working conditions or pressure test；

4　Auxiliary equipment and thermal insulation materials，linings，pipes，escalators，platform gravity loads；

5　Wind load，seismic load and snow load；

6　Eccentric load；

7　Partial load；

8　Impact load；

9　Force caused by temperature gradient or thermal expansion；

10　The load generated during the installation and operation of personnel can be calculated according to the uniformly distributed load of 1.5kN/m ² ；

11　Other short-term loads.

5.2.2　Wind loads，seismic loads and snow loads shall be in accordance with the following requirements：

1　The basic wind pressure value of each region may be determined according to the National Basic Wind Pressure Distribution Map or the local meteorological department data，and shall not be lower than the relevant provisions of the current national standard GB 50009 Load Code for the Design of Building Structures ，and shall not be less than 300N/m ² ；

2　Seismic fortification intensity shall include design seismic grouping and seismic acceleration，and shall be determined according to local meteorological data，and shall not be lower than the relevant provisions of the current national standard GB 50011 Code for Seismic Design of Buildings ；

3　The snow load shall meet the relevant requirements of the current national standard GB 50009 Load Code for the Design of Building Structures.

5.2.3　The local load shall include the reaction force of the support，the lugs and other accessories on the local area of the equipment housing，and the connection loads generated by the pipes，valves and other container components.

5.2.4　The impact load shall include the impact load caused by the sudden fluctuation of the pressure，the reaction force caused by the fluid impact，and the additional load generated during transportation and lifting.

5.2.5　Short-term loads shall include wind loads，snow loads，seismic loads，personnel loads，and installation loads.

5.2.6　The various loads on the equipment shall be the most unfavorable combination of installation，hydrostatic test，normal working conditions and abnormal working conditions.The combination of loads can be determined according to specified in Table 5.2.6.