Some basic facts - definition of pipe
A pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances which can flow ? liquids and gases (fluids), slurries, powders and masses of small solids. It can also be used for structural applications; hollow pipe is far stiffer per unit weight than solid members.
In common usage the words pipe and tube are usually interchangeable, but in industry and engineering, the terms are uniquely defined. Depending on the applicable standard to which it is manufactured, pipe is generally specified by a nominal diameter with a constant outside diameter (OD) and a schedule that defines the thickness. Tube is most often specified by the OD and wall thickness, but may be specified by any two of OD, inside diameter (ID), and wall thickness. Pipe is generally manufactured to one of several international and national industrial standards.1 While similar standards exist for specific industry application tubing, tube is often made to custom sizes and a broader range of diameters and tolerances. Many industrial and government standards exist for the production of pipe and tubing. The term "tube" is also commonly applied to non-cylindrical sections, i.e., square or rectangular tubing. In general, "pipe" is the more common term in most of the world, whereas "tube" is more widely used in the United States.
Both "pipe" and "tube" imply a level of rigidity and permanence, whereas a hose (or hosepipe) is usually portable and flexible. Pipe assemblies are almost always constructed with the use of fittings such as elbows, tees, and so on, while tube may be formed or bent into custom configurations. For materials that are inflexible, cannot be formed, or where construction is governed by codes or standards, tube assemblies are also constructed with the use of tube fittings.
Źródło: https://en.wikipedia.org/wiki/Pipe_(fluid_conveyance)
Failures sewage in residential blocks
The blocks may be different failures sewage. Within a week, they are repaired by a team of plumbers employed in cooperatives. In contrast, during the holiday season, or in the case of sudden death during the night, residents will be able to call the emergency water and sanitation and ask to come to the block where the accident occurred. In some situations it may become necessary to purify the basement flooded by the sewage system before the tenants will be able again to enter it. Sewer block can be cleaned using methods commonly used to clean drains, such as. Pressure method. After her performance will be further tested patency sewage before residents return to their homes.
Checking the boilers working in a block of flats
Usually when putting a new unit for use in all apartments are mounted so the boilers operating on gas or electricity. The task plumbers will not only be mounted boilers in all apartments, but also a thorough check of their safety and to adapt their work to the accepted standards. The equal time derogation will also be checking the efficiency of the installed boilers and gas leaks associated with their work. Residents should report to the administration failures resulting in their boilers and replace them only on those that are admissible in blocks for security reasons. Building administrator may also instruct mandatory exchange of the boilers, which ceased to function well.