Spreading guideline for seismic support of pipe gallery
The seismic support of fire pipeline is equipped with lateral support and longitudinal support. Its principle is to form support in four directions of 90 ° each other on the level plane of the pipeline's centroid. The seismic force of degree acts from arbitrary direction, and the pipeline is maintained. Two rigid supports of 90 ° device can maintain the pipeline in degree direction because they have the ability of tension and compression at the same time; For flexible support, four supports with 90 ° to each other on the degree plane must be made. Therefore, seismic supports and hangers have more stringent requirements on the performance of diagonal braces and suspenders.
How to arrange anti-seismic nodes during the application of anti-seismic support of fire pipeline:
1. Lateral seismic supports and hangers shall be set at both ends of each straight pipe.
2. At least one longitudinal seismic support and hanger shall be set for each straight pipe section.
3. The spacing between diagonal braces and hangers of the seismic support shall not be greater than 0.1 m.
4. All the supports used should be firmly connected with the main structure. When the pipeline passes through the building settlement joint, the relevant impact of uneven settlement should be considered.

During the use of pneumatic control valve, cavitation and flashing are two common phenomena, especially in the case of large pressure difference. Cavitation and flashing will seriously damage the sealing surface of the control valve, causing leakage of the sealing surface of the control valve, or even loss of the regulating ability. Therefore, the pneumatic control valve should be reasonably designed according to the on-site technical requirements at the design stage. So, what methods can be used to avoid cavitation and flashing of pneumatic control valve?