Conducting self-activity of the hydraulic
Persons employed as plumbers can sign various contracts of employment. They work full-time in a variety of plants, hydraulic or sign contracts-orders for certain services. Some plumbers also run his own business, under which perform minor plumbing services.
Nowadays, self-employed persons often assume hydraulic websites, which include information on the services rendered by them and their price list.
They also by posting information about their activities on bulletin boards, and even spread leaflets around the city to encourage use of their services.
So they can get regular customers, who will often benefit from their services.
Ordering services hydraulic performed in small towns In the area of small towns they are carried out various plumbing work.
They are most often associated with improving water and sewage networks, and above all the wells and the removal of these branches or leaves, and various filth.
The implementation of specific services hydraulic ordered also by owners of residential houses, where you need to install new sanitary or check the efficiency of their operations.
The homes can also occur failure of hydraulic such as rupture of the seal or hose from the washing machine and the lower belt in a washing machine.
Repair any of this type of failure can be reported to the plant hydraulic operating near the town, in which the owners home.
Wikipedia about Gaskets
Gaskets are mechanical seals, usually formed like a ring and used for sealing of flange joints.
In general, gaskets should not be reused.
Various types of gaskets are available depending upon their construction, materials, and features. The following are the type of gaskets commonly used:
Non-Metallic Gaskets (ASME B 16.21)
Spiral-Wound Gaskets (ASME B 16.20)
Ring Joint Gaskets (ASME B 16.20)
Non-Metallic Gaskets are used with flat face or raised face flanges. Spiral-Wound Gaskets are used with raised face flanges.
They are available with an inner ring and outer ring, which is also known as the cantering ring.
Ring Joint Gaskets are used with Ring Type Joint (RTJ) flanges.
They are available in octagonal or oval cross sections.
A very high surface stress is developed between an RTJ gasket and the flange groove when RTJ is bolted up in a flange.
This leads to plastic deformation of the gasket.
Thus, the hardness of the gasket is kept less than the hardness of the groove to achieve coining i.e.
bringing two metal surfaces of different hardness so tightly together that the softer surface deforms to match harder surface exactly in shape and finish. Źródło: https://en.wikipedia.org/wiki/Piping_and_plumbing_fitting.