Design requirements and installation precautions for seismic supports

1、 Design requirements for seismic supports

The design requirements for seismic supports aim to ensure that they can effectively support and protect pipeline systems during earthquakes. The following are some key design requirements

Structural stability:
Seismic supports should be designed to be strong enough to withstand expected seismic forces and maintain structural integrity.
The bracket material should be selected with high strength and corrosion resistance to ensure long-term reliability.

Position accuracy:
The position of the bracket should be accurately calculated to ensure smooth and tight contact with the supported pipeline after installation.
The layout of supports should consider the overall stability of the pipeline system and avoid setting up supports at locations of stress concentration.

Displacement limit:
Pipelines and wire conduits are allowed to have a certain longitudinal offset, but it must not exceed the limit value of the maximum lateral support spacing specified.
The allowable deviation of equipment such as air ducts should also comply with relevant standards to prevent damage caused by excessive displacement.

Load calculation:
When designing seismic supports, factors such as the weight of the pipeline system, dynamic loads, and seismic forces need to be considered.
When calculating horizontal seismic force loads, it is usually only necessary to consider the full load weight, but the specific situation may vary depending on the project.

Consideration of thermal expansion and contraction:
The design of seismic supports should take into account the displacement of pipelines caused by thermal expansion and contraction.
When considering the factors of thermal expansion and contraction, the longitudinal hanger should consider that the selected model should be able to resist pipeline thermal expansion and contraction stress in component selection.

Specific scenario requirements:
For specific types of buildings and pipelines, such as smoke ducts, accident ventilation ducts, and equipment, specialized seismic supports and hangers should be used.
Gas pipelines and other flammable and explosive pipelines should also undergo specialized seismic design to ensure safety.

2、 Precautions for installation of seismic supports

When installing seismic brackets, the following precautions should be taken to ensure installation quality and safety

Preparation before installation:
Before installation, carefully check whether the components of the seismic support are complete and undamaged, and ensure that they meet the design requirements.
Installation personnel should be familiar with the installation drawings and operating procedures to ensure a smooth installation process.

Installation location and layout:
The installation position of the bracket should meet the design requirements, avoiding installation in stress concentrated areas or vulnerable areas.
The layout of the bracket should be reasonable to ensure the overall stability and safety of the pipeline system.

Fixed and connected:
The bracket should be firmly fixed to the wall or structure to ensure that it can withstand the expected seismic forces.
The connection between the bracket and the pipeline should be tight and reliable, avoiding looseness or detachment.

Adjustment and inspection:
After installation, the seismic support should be adjusted and inspected to ensure that it meets the design requirements and is in good condition.
Regularly check the tightness of the bracket and the stability of the pipeline system, promptly identify problems, and take measures to repair them.

Safety precautions:
During the installation process, safety operating procedures should be followed to ensure personnel safety.
Avoid stepping on the support or using it as a scaffold to prevent damage to the support or injury to personnel.