Installation of chemical equipment supports
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There is currently a set of equipment in which the ear mounts are supported on concrete beams (with embedded iron plates on those beams); currently, the ear mounts are welded directly to those embedded iron plates. However, the client requires that welding not be used and instead bolts should be employed for the connection. Are there any requirements or standards regarding this type of installation?~
Based on conventional engineering installation experience, the installation of ear support brackets for chemical processing equipment should meet the following requirements: 1. The connectors and bolts used for the ear support brackets should comply with **standard or industry standards； 2. The bolts used to support the earrests should be high-strength bolts, and they must have sufficient tightening force ； 3. The connection between the earthing lug and the bolt must be secure; there should be no looseness ； 4. Gaskets or other materials that can provide cushioning need to be installed between the earthing posts and the concrete beams ； 5. Ensure that the connection point between the earrest and the concrete beam is located on the upper surface of the embedded steel plate, and the connection area should be smooth with no obvious protrusions or depressions ； 6. After installation, inspections and tests are required to ensure that the earrest support of the equipment is safe and reliable. It should be noted that the specific circumstances of each project may vary, so it is recommended that you consult a professional equipment installation company or engineer for more detailed and accurate guidance. .
The ear seat is originally connected by bolts; it is sufficient to follow the standards for ear seats specified in NB_T 47065.3-2018. :)
The ear seat is originally bolt-connected per NB_T 47065.3-2018
If the equipment is not subjected to eccentric loads, and seismic and wind loads are not taken into account (i.e., only the equipment’s own weight is considered), then there is no impact at all; welding is equivalent to bolted connections in this regard. When seismic, wind loads, and eccentric forces are considered, the actual load borne by a welded structure is somewhat less than that of a bolted structure. In other words, welding (provided that the embedded plate is firmly bonded to the foundation to achieve absolute rigidity) is a better option than bolted connections. Of course, the standard design uses bolted connections, and most projects are also constructed using such bolted structures
Furthermore, for the equipment itself, is there any temperature difference stress? Is it a equipment at normal pressure or a pressurized equipment? When internal pressure or temperature differences are present, deformation occurs, and this deformation leads to local stresses at the support areas. Therefore, bolted connections are more suitable for \"pressure vessel\" structures