On-site construction of pipelines

Haha, then go and take a look at the site. If there’s a schematic diagram, the workers will of course cut the materials according to the dimensions specified in that diagram. If the design isn’t accurate, it will cause problems, so it’s essential to ensure that the design is precise.

When designing pipes for on-site installation, it is essential to take into account some on-site installation allowance.

Construction workers carry out their work in accordance with the blueprints. There is usually a design briefing before construction, as well as an inspection of the design drawings. Additionally, the construction workers, construction supervisors, and the owner also review the design drawings. Nevertheless, it is the designers who are responsible for the accuracy of their drawings; therefore, they must be meticulous and dedicated in their work. During construction, a margin is taken into account for materials, but not for errors. Any changes during construction are made based on the baseline drawings.

Going to the construction site regularly can be very helpful in improving your design skills.

If I were working on the site, I would also find it strange: how can designers draw three-dimensional pipe layouts without actually touching them? Each approach has its advantages; designers are very strict in following regulations, while constructors are skilled at dealing with issues that arise on site. For example, when it comes to connecting pipes made of composite materials, the design drawings do not show the details of these connections, but subtle differences in implementation can lead to completely different results

I work in on-site construction. Generally, process pipelines come with schematic diagrams, and workers cut the materials according to those diagrams. However, it’s not possible to cut everything precisely; there needs to be a margin or opening in each of the east-west, north-south, and up-down directions. The actual length of the material to be used is determined after measurements are taken on site. In contrast, prefabricated components are cut exactly according to the dimensions specified in the drawings. Moreover, there is strict control over the quality of the materials used. If the dimensions specified in the design aren’t accurate enough, it not only leads to mismatches but can also cause delays in the project timeline. Therefore, those who create the designs must be thorough and strive for precision. :(

I basically agree with what was said on floor 9: the design certainly needs to be as accurate as possible, but it’s by no means necessary to achieve perfect precision. There will always be openings during on-site construction, and pipes cannot be made too long either; therefore, slight deviations in length and height are not a problem.

The prefabrication of pipelines at construction sites is mostly based on single-line diagrams; therefore, your design must be as complete as possible. Meanwhile, designers need to visit the site frequently, rather than creating designs in an office under ideal conditions.

It is essential during the design phase, and sometimes, if there is a slight deviation, adjustments can be made on site. The workers also have experience

It’s best to be precise when doing design work, to avoid problems on site later

Designers need to go to the site regularly. For one of our current projects, we didn’t see any designers show up; we scolded them before they finally came

It’s not possible to follow the design in every case; there are some situations on site that weren’t taken into account during the design phase

That’s right. If workers notice any errors in the design, they will cut the materials based on their own experience! Be more careful when designing!

It’s that serious? I haven’t been to the scene either; I really have no idea at all. I need to learn more first

I just designed a system; I was responsible for arranging the pipes, handling the piping work, and setting up the pipe racks. Yet I don’t have any actual experience in this area at all. It’s frustrating – I really have no idea how many problems will arise on site

I basically have no on-site experience at all, and it’s not possible to get any arrangements to go to the factory site. What should I do?

Although construction is carried out according to the plans, a margin is still left based on actual conditions

Generally, a margin is left, as well as some flexibility.

We should still trust the technical skills of our construction workers. Although some of the drawings are indeed rather rough, and some of them are merely schematic illustrations showing general principles, as long as there are no fundamental errors, we are generally able to carry out the construction properly. The only issue is that it reduces the depth of prefabrication, which is not conducive to improving work efficiency. I have another question for those working in design: do you usually produce single-line diagrams along with the construction drawings? Why don’t most of the projects I’ve worked on come with line drawings? This creates a huge amount of work for us when it comes to preparing the as-built drawings, as line drawings are required for the handover of pressure pipelines, and weld numbers must be indicated on those drawings. As a result, we have to create our own line drawings, which, due to various constraints, are often not drawn in a proper manner.

If the size is large, there will be no problem; just set up the field port in the single-line diagram.