High temperature pipe supports
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My unit has an L-shaped pipe, and steam is flowing in the pipe. Since the pipe will have condensed water in the early stages of use, liquid shock will occur when steam is introduced, causing the pipe to vibrate and cause the flange welding joint at the top of the riser to crack. (Note: The riser is a printed type 7. There is a short section on the top of the head. The short section is butt welded to the flange and connected to the equipment. It is this welding joint that is cracked) In order to reduce or eliminate the displacement when the pipe vibrates, in addition to draining the condensed water, I also want to L The elbow of the pipe needs to be fixed with a bracket. Because the spring bracket was previously used at the elbow to ease the thermal expansion and contraction of the pipe, it only plays a supporting role and cannot fix its position so that it does not move back and forth. Now I want to put a bracket on the left side of the elbow to prevent it from moving back and forth as much as possible, and at the same time take care of its thermal expansion and contraction. We can't come up with a feasible solution for how to make this bracket. I hope everyone can give their valuable opinions.
Note: Now I want to put a bracket on the left side of its position so that it does not move back and forth as much as possible. The left side of it should be done. I hereby indicate that I am sorry.
After looking at it for a long time, I didn't understand it very clearly. (No picture? It's L and 7) The bracket is made into a sliding bracket. Check the atlas to find out how to do it. I didn’t see the soft connection you mentioned connecting to the device? Is such a big vibration in the pipeline transmitted directly to the equipment?
Vibrating pipes and equipment should be connected with soft connections. To consider thermal expansion and limit the position, the only way is to use guide brackets.
There is something wrong with the operation, otherwise there will be no water hammer. It is normal for the pipe to expand due to heat.
I forgot to state earlier that the pressure in this pipe is 25 kg of steam. Is it appropriate to use soft connections? The design institute designed does not have soft connections. The spring bracket used at the lower end of the pipe is not fixed, and the pipe can move back and forth. However, the pipe is far away from the equipment, and the installation position of the guide bracket is difficult to determine. I drained the condensation water as much as possible when using it, but there was still liquid slugging.
In fact, water hammer is mainly caused by improper operation of the steam temperature pipe! In addition, the thermal expansion compensation of steam pipelines needs to be considered based on the actual situation of your pipeline. You'd better draw a sketch for us so that we can make suggestions for you! :lol :handshake
In general, the pipe stress should be calculated for the entire pipeline to see if it is necessary to add expansion joints and the installation points of the fixed bracket and guide bracket should be selected. For small pipes or where the temperature is not high, ∏-shaped compensation can be designed. In this case, the bracket should be a sliding guide frame (see the standard atlas of pipe racks). If you are still unclear, please send us the current piping diagram for discussion.
The nipple is butt welded to the flange and connected to the equipment. It is the cracking of this welding joint to see if it is a quality issue with the welding joint (due to fatigue fatigue) or socket welding... If it is socket welding, it is recommended to change to butt welding. This post was last edited by ssmith2007 on 2008-2-25 23:42 ]