Features of installation of pipelines

In order for the pipeline to serve the entire service life without incident, you need to carefully approach its installation. It is necessary to comply with all the requirements of state standards and regulations, as well as to control the quality of all pipes and fittings used.

Preparatory stage

Before installation work on laying pipes, it is necessary:

• to pick up working drawings, specifications, technical documentation;
• organize places for temporary storage of pipeline elements;
• equip welding posts;
• finish general construction works;
• prepare scaffolding and scaffolding;
• pick up a tool.

The selection and study of technical documentation is carried out by foremen or chief foremen.

Tool storerooms and storage areas for pipeline elements are located in close proximity to the work. Collapsible and container structures are used as temporary structures. They contain pipes, fittings and other devices, including valves, gate valves, check valves, etc.

All embedded elements are carefully checked, the installation sites are cleared of debris, freed from foreign objects, and workers have access. Collapsible scaffolding and scaffolding are harvested, workers are given instructions on safety and the work being carried out.

Features of welding of pipeline elements

Welding of non-ferrous metal pipes is carried out only at a temperature not lower than -5 degrees Celsius. Copper, aluminum and brass pipes are welded by gas, electric arc methods, or welding in the environment of protective gases. Brass and copper pipelines can also be soldered.

Before welding or soldering work, the ends of the pipes are cleaned inside and outside. This is done by pipe cutting machines. The project may involve cleaning by etching.

If copper and brass pipes are welded by the gas method, a mixture of acetylene and oxygen is used. The flame must be in a pivoting position. Copper is welded with a normal flame, brass is oxidized. For greater strength, pipes up to 5 mm thick are forged in a cold state. These seams on copper pipes are heated to 500-550 degrees and cooled in water, and on brass pipes they are heated to 600-650 degrees and cooled in air.

Aluminum pipes are also welded with acetylene oxygen normal flame. Aluminum oxides are removed by fluxes, they also protect against oxidation of liquid metal. The pipes are joined by internal and external centralizers. Before welding aluminum pipes, their edges are heated to 200-250 degrees. The surface of the layered tacks is cleaned with metal brushes during argon-arc welding or with water in other types of welding.