Fittings are manufactured in various designs. The manufacturer offers T pieces, connectors, plugs, bends, sockets, and more. With the reduction, the installer can switch from one pipe size to another, even from metric to imperial.
You can look for the stainless steel tri clamp ferrule at https://sanifittings.com/collections/ferrules for pipe fitting. Unlike the folding fittings, there are no standards set for the production of ferrule fittings.
All manufacturers use the same method to distinguish between metric and imperial fittings. Materials such as high nickel alloys, high-temperature alloys, duplex, and super duplex are coated in the same way as bile protection agents.
These ingredients are chosen so that they are compatible with the liquid media contained in them. The ideal situation for chemical stability is tubes and fittings made from the same material.
There are strict installation instructions that you must follow for this type of product. The rule is that most sizes of 1-1 / 4 round nut from the fixed position of the finger ensure proper sealing of the seal. Additional "compression" from the valve is allowed if there is a slight leak, but this is not usually necessary.
When access to a system is needed, these fittings are an excellent entry point. The connection can be repeated and reassembled without losing the integrity of the seal, provided the correct installation instructions are followed.