Should the material of the pipe fittings, the valves, and the supports be the same as that of the pipes?

It doesn’t have to be the same; it depends on the medium flowing through the pipeline, and whether it is corrosive or not

Should the material of the fittings be the same as that of the pipes? They are generally designed to be the same, though individual exceptions exist. Should the material of the valve be the same as that of the pipeline? Not necessarily, right? For fiberglass-reinforced plastic pipes, aren’t copper valves still used? Should the material of the bracket be the same as that of the pipe? If it is welded, it’s best if they are the same; but if it is a clamp or a U-bolt with a rubber bushing, then it’s different.

Don’t call me a god; just call me an immortal. :$ I’m not in the chemical industry; I’m not responsible if you make a mistake. :lol

I have another question for you: what does three-way PU BW mean?

Please provide the other information; I’m not sure where this PU comes from.

Should the material of the fittings be the same as that of the pipes? They are generally designed to be the same, though individual exceptions exist. Agreed. Let’s improve the following: Should the material of the valve be the same as that of the pipes? Not necessarily, right? For fiberglass-reinforced plastic pipes, aren’t copper valves still used? Of course, it would be best if the material of the valve body for welding purposes was the same. If different materials are used, an additional welding process evaluation will be required. As for flange connections, there are many stainless steel pipes that use carbon steel valves; this depends on the requirements of the medium, just as mentioned earlier, it varies depending on the circumstances. Should the material of the bracket be the same as that of the pipe? If it is welded, it’s best if they are the same; but if it is a clamp or a U-bolt with a rubber bushing, then it’s different. Agreed, but note that even when using clamps, it’s best to use stainless steel for stainless steel pipes, and carbon steel for carbon steel pipes.

There are two answers to this question. The first is that, in general, they are the same – which is easy to understand. The second is that they can also be different, and this is not uncommon either; factors such as different systems, specific areas, or the need to save materials play a role. Otherwise, why are there so many sets of loop flanges, with the flanges, welding rings, and flanges themselves made of different materials? Moreover, many welds involve different types of metals being welded together. So, it’s not certain – it depends on the situation, the location, and the specific circumstances

The bracket is fine; it didn’t come into contact with the medium, it was only barely a problem. The material of the valve body should be the same as that of the pipeline, or it can be superior to the pipeline material as well