Friction force calculation under the conditions of external pipe galleries in the plant area
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Seeking help: For the piping discipline outside the factory area, when specifying requirements for the structural discipline, how should friction calculations be taken into account? Does friction need to be considered for pipes with pipe supports?
Piping thrust may need to be provided, such as in thermal pipelines, at locations where expansion supports are present @ylb913 @ZhiZheMing @
The friction force must take into account its relationship with the static load on the pipeline, and the friction coefficient of the pipeline is selected based on the structure type of the pipe support (steel pipe support or concrete pipe support). The selection of the coefficient is related to the material of the pipeline and the material of the pipe support; when performing calculations, only the static load on the pipeline needs to be considered (it is best to use the weight of the medium plus the weight of the water filling, taking the maximum value). It doesn’t matter whether there are pipe supports or not.
There should be a compensator + sliding pipe support
In addition to the thrust exerted by the stress analysis on the pipeline, *inertia is generally taken as 0.3 times the friction force
The optimal solution is to prepare a stress analysis report
What if the pipes are laid directly on the steel structural pipe rack without any covering? Is it also only considering vertical loads, without the need to take into account the friction coefficient?
It should be taken into account that, remember, it’s 0.3 for steel to steel
So when discussing the civil engineering requirements, in addition to considering vertical loads, should we also take into account the horizontal thrust exerted by pipes, calculated using a friction coefficient of 0.3 for steel-on-steel contact? For thermal pipes, should the horizontal thrust be determined based on stress calculations? But it seems that most designs currently only take into account vertical loads for pipes at normal temperatures; if friction is also considered, will the steel structure of the outer pipe support become too heavy?
For thermal pipelines, the design is based on the results of stress analysis. For pipelines at normal temperatures, our previous approach was to indicate the vertical loads in the condition diagram, and to specify the value of the friction coefficient in the description of those conditions. The specific calculations are carried out by the structural engineering team