Heat exchanger nozzle position change processing
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As shown in the figure, due to XXX reasons during the production of the heat exchanger, the position of the shell side liquid inlet and outlet cannot match the on-site pipe opening. The on-site pipe size is determined and cannot be changed, so the opening position of the heat exchanger can only be changed. Since it is a fixed tube plate, cutting off the pipe opening (Q345E, 89x4) will inevitably damage the internal heat exchange tube. Therefore, the initial plan is to cut the pipe and the cylinder flush, then use a 90° elbow to cut it from the 45° position and rotate it 180°. After butt welding, it is assembled with the cylinder and subjected to corresponding non-destructive testing to solve the 35mm eccentricity problem. So the question is: 1. Is this kind of structure allowed by the standard specification? 2After the change, the straight edge section of the nozzle is gone. How to deal with the opening reinforcement? 3. Can the general design drawing be changed like this? The Type II heat exchanger requires supervisory inspection. Is it possible to pass it?
My God, your reform is too bold.
This post was last edited by 515133307 on 2017-7-10 11:46 As a technician, I have considered the above issues this way, but the leader is concerned about the cost issue. If the pipe is moved as a whole, the heat exchange pipe must be dismantled, and then a series of problems will come. If it is scrapped, it will be a waste: dizzy:
Coordinate the on-site piping, that is the simplest and safest
If the equipment has undergone supervisory inspection, such modifications will definitely fail the special inspection. Can't we consider moving the equipment and think of a solution from the pipeline? For example, the pipe uses a reducing section and an XX degree elbow to match the pipe?
This is used as a substitute for the maintenance heat exchanger of an offshore platform of CNOOC. There are 4 of the same model (2 in use and 2 in standby). The pipeline positions have been fixed. This is done to ensure interchangeability. If the pipelines are changed, the other three heat exchangers cannot be used: funk:
This is used as a substitute for the maintenance heat exchanger of an offshore platform of CNOOC. There are 4 of the same model (2 in use and 2 in standby). The pipeline positions have been fixed. This is done to ensure interchangeability. If the pipelines are changed, the other three heat exchangers cannot be used: funk:
What is "process piping"? It just needs to match the equipment. I have never seen the equipment need to be matched with the pipeline. Piping adjustments must be coordinated and the equipment itself must not be damaged at will.
This post was last edited by AtlantisH on 2017-7-10 14:06. It will definitely fail. If it passes, what should I do if something goes wrong? I don’t want my job anymore. I don’t know what the operating conditions are, and whether a section of flexible pipe (GB/T 14525-2010) can be installed at the connection point.
It’s a problem with on-site surveying and mapping, there’s nothing we can do about it :(