Is the nozzle orientation diagram a good condition? Is it better as a finished product?

I think the first approach is more reasonable; a design firm I know does it that way

As the division of labor becomes more detailed, computer-based design becomes simpler, and project timelines shorten. So it’s impossible to wait until all the piping is installed before starting to manufacture the equipment. Once the piping layout plan is ready, the locations of the equipment connections are generally determined, especially for those with larger diameters. If later on the direction of the pipes changes, resulting in changes to the location of the connections, it becomes necessary to coordinate with the equipment design team and the manufacturer. In my opinion, it’s better to provide the equipment design team with a preliminary version of the equipment assembly diagram based on the current piping layout. Any modifications that are needed later can be handled by the piping team by submitting a notice outlining the changes to the pipe locations; after the equipment design team approves this, it can be sent directly to the manufacturer, which is a quicker and more efficient approach that saves time.

It is better to provide the nozzle condition diagram as a design requirement to the equipment team. There is a certain discrepancy between the conditions proposed by the piping team and the drawings prepared by the equipment team; making adjustments by the equipment team can help avoid errors.

In my opinion, it would be better to provide the nozzle orientation diagram as a design requirement to the equipment team, who will then handle its inclusion in the final product. This is how the new work instructions in our department are stipulated at present.

The pipe outlet layout diagram should be a finished document specific to the piping discipline; it must be produced at the time of drawing and also archived. This requirement is included in the unified specifications regarding the content and level of detail required for chemical process drawings. The equipment discipline generally only specifies the elevation and size of the pipe outlets, with the details being indicated on the equipment drawings; the location of the pipe outlets can be found in the pipe outlet layout diagram. Typically, equipment manufacturers first create the shape of the equipment based on the equipment drawings, and only after obtaining the pipe outlet layout diagram do they proceed with designing the pipe outlets.

For piping designers: It is the best design workflow to archive the positions of equipment connections as part of the final product, have them approved by the equipment designers, and then send them to the equipment manufacturers. As is well known, the piping process takes a long time, and it is often necessary to adjust the positions of the connections during this process in order to arrange the pipes more reasonably. Moreover, for those pipes for which stress calculations are required, such calculations can only be carried out after piping is completed, once the necessary conditions are met; if it is not possible to adjust the pipes, the stress on the connections can only be reduced by adjusting their positions. Clearly, archiving the positions of equipment connections as part of the final product is beneficial for both design and manufacturing. However, since there is a certain time frame involved in equipment manufacturing, specifying the positions of the equipment connections can affect the project timeline and progress. Therefore, I believe that this issue cannot be addressed in a one-size-fits-all manner; adjustments should be made based on the specific circumstances of each project. Each design firm has its own system for task allocation and management, and since people approach problems from different perspectives, it is still important to prioritize what is best for the project.

In my opinion, there are advantages and disadvantages on both sides, and it should be determined by each design institute based on the specifics of the project. For pipes with high temperatures, high pressures, and large diameters, as well as the pipe connections of equipment that require stress calculations, it is recommended to provide the pipe connection layout in a conditional form to the equipment engineering team, which will then prepare the actual pipe connection layout. In this way, the device nozzles may be subjected to additional forces resulting from thermal stress; the equipment specialists must also check whether the wall thickness of the casing meets the requirements and verify that there are no conflicts between the pipes and the welds. Errors can be reduced as professional equipment drawings go through design, verification, and approval processes. For the pipe ends of some equipment with lower temperatures and pressures, it is recommended that the layout diagrams of these pipe ends be prepared by the piping specialty. In this way, the mechanical engineering team can produce drawings earlier, allowing manufacturing plants to prepare materials and carry out prefabrication in advance; whereas the piping engineering team generally requires more time for piping work. Finally, after approval by the equipment specialists, as long as it does not come into contact with the welds, it is acceptable; even if there is contact, the pipeline can be adjusted slightly or modified a bit.

Under normal circumstances, this serves as a condition: when the piping discipline conducts a comprehensive assessment, it is already possible to determine the location, size, and elevation of the pipe outlets. If the piping discipline prepares it as a final drawing, there may be conflicts with the equipment discipline.

Conditions, we use conditions everywhere

Hehe, I agree with the opinions and approaches expressed in floors 7 and 8. In terms of the designs carried out in our company, clients often request that the equipment be ordered in advance, especially for those with long lead times. After that, the piping team is tasked with designing the pipelines; once they have completed the piping design and determined the locations of the pipe connections, they submit this information to the equipment team for approval before it is sent to the equipment manufacturers. This approach can save a lot of time!