plumbing Hackney Wikipedia about piping union
A union is similar to a coupling, except it is designed to allow quick and convenient disconnection of pipes for maintenance or fixture replacement. While a coupling would require either solvent welding, soldering or being able to rotate with all the pipes adjacent as with a threaded coupling, a union provides a simple transition, allowing easy connection or disconnection at any future time. A standard union pipe is made in three parts consisting of a nut, a female end, and a male end. When the female and male ends are joined, the nut then provides the necessary pressure to seal the joint. Since the mating ends of the union are interchangeable, changing of a valve or other device can be achieved with a minimum loss of time. Pipe unions are essentially a type of flange connector, as discussed further below.
In addition to standard, simple unions, other types of union exist:
Dielectric unions are unions with dielectric insulation, used to separate dissimilar metals (such as copper and galvanized steel) to avoid the damaging effects of galvanic corrosion. When two dissimilar metals are in contact with an electrically conductive solution (even tap water is conductive), they will form a battery and generate a voltage by electrolysis. When the two metals are in direct contact with each other, the electric current from one metal to the other will cause a movement of ions from one to the other, dissolving one metal and depositing it on the other. A dielectric union breaks the electric current path with a plastic liner between two halves of the union, thus limiting galvanic corrosion.
Rotary unions are unions that allow for rotation of one of the united parts.
Źródło: https://en.wikipedia.org/wiki/Piping_and_plumbing_fitting
Checking the status of the hospital network plumbing
Building a hospital is this type of building, which must run smoothly at all levels. Therefore, in addition to cleanliness in the bathrooms, also asks a lot of attention on the general state of water supply and sewerage hospital. This can prevent the occurrence of various unforeseen situations that could harm the good functioning of the hospital and the safety of his patients. Every few years should, therefore, check the status of the hospital water supply, sewerage and if necessary exchange the already clogged pipes that belong to the network. All of these activities can be carried out by a team of plumbers working in a nearby factory water and sanitation. From time to time you should also be exchanged sanitation in the hospital.
Plumbing code - Wikipedia:
Plumbing code is a code that provides regulations for the design, installation and inspection of building plumbing and sanitary systems. In the U.S., jurisdictions enact their own codes, some of which are based upon model plumbing codes.1 The most widely adopted plumbing code in the United States is the International Plumbing Code published by the International Code Council (ICC). This code is also used as the basis for the plumbing code of some other countries. Another model plumbing code published in the United States is the Uniform Plumbing Code published by IAPMO.
Źródło: https://en.wikipedia.org/wiki/Plumbing_code