Installation of the pipeline
Installation of the pipeline must be carried out by specialists. The same applies to repairs. During the gasification of a given project, which provides for the diameter and material of pipes, their location and attachment, as well as the types of the used compounds.
Prior to installation measurements are made. and then manufactured components and parts of the future gas pipeline. For large construction created centralized workshops in which produced all the necessary details. If the volume of work is small, mobile workshops are used, which are 1-2 trailers delivered to the object by car.
Installation of the pipeline inside the buildings starts with the installation of the input device. First, in the lower part of the outer wall of the building breaks through the hole, which will be installed case. Further through it the pipe is passed and to its end the riser is mounted. As a rule, welding is used for the joints. The riser is located vertically along the wall at a distance of 20 millimeters and is attached to it by means of special hooks.
Boxes are also installed in places of passage of the gas pipes through the floor, walls and staircase. Inside the wiring trying to do with a minimum number of welded joints. using pipes of great length.
Pipe of diameter 150 mm and wall thickness of 5 mm, allowed welding gas welding. As for the material of the pipes, most often for the pipeline materials used and low-alloy low-carbon steel. The pipes are also divided according to the method of manufacture for seamless and seam.
Even the installation of the pipeline involves the use of fittings - small parts with pipe threads (couplings, elbows, tees, crossings, adapters, plugs and so on). These parts are usually made of steel or cast iron.
There are accepted standards for the welding and mounting pipes. Before welding is necessary to prepare a place. The pipe ends must be cut and trimmed to a length of 10 millimeters. Hooks for fastening pipes should be placed at a distance of not more than 2 meters when pipe diameter is 25 millimeters. Mounting should allow to easily inspect the pipe for damage. and also give the opportunity to perform various repairs. The ends of the fastenings, as a rule, are driven into wooden plugs and filled with cement mortar.
All threaded connections must be assembled with the use of long-fibre flax. First, the thread lubricated by special beligum or red lead, and then it is clockwise wound tape linen with a width of 15 millimeters. In addition to flax can use the tape FUM (ftoroplastovye sealing material). It does not require lubrication, and only two of its revolutions to securely seal the threaded connection.
When installing a gas pipelineused special lever keys with parallel jaws with notches for better grip on the part. When working with such keys, the force must be applied from the side of the flat lever. Otherwise, there is a risk of poor adhesion, which will lead to a tool breakdown from the part.
As you can see, the installation of a gas pipeline is a rather complicated process. which should be carried out by qualified masters under the guidance of specialists.