Today, the volume of production and sale of rolled tubular products is constantly growing. The technology of production improves, and prices decline. One of the most popular types of rolled products is steel pipe. The scope of its use are almost limitless. It with identical success used in the construction of steel structures and mechanical engineering, and agriculture. As for benefits, the steel pipe has many undisputed advantages, such as:
·durability, corrosion resistance;
·relatively low cost;
·the wear resistance.
Data on metal placed on the pages of our website and regulatory documents, GOST and T. W. For those who are interested in tube rental, certified quality at the best price, we recommend you to contact the Manager of the company «Auremo». Individual approach in collaboration with each client and prompt delivery is guaranteed. Phone numbers and e-mail addresses specified in section «Contacts».
Modern industry can produce any pipe for the operation of housing and communal services, geological exploration, gas production, and industrial chemistry. More than 50% of tubular metal is made from iron alloys. Steel and iron have good thermal conductivity and resistance to corrosion. They are wear-resistant, durable, relatively cheap compared to products from non-ferrous alloys. The finished pipe klassificeret on a number of parameters: scope, material and method of production of pipes, corrosion resistance.
Kinds of pipes
Tube rental is divided by the metal used:
- color (tin, copper, etc.)
- black (steel alloys)
For corrosion resistance
- from iron alloys
- stainless steel
- with the polymer coating (polyurethane, PMI, insulation)
Type of production:
- produced by drilling
- casting (cast iron pipe)
- having a spiral seam
- with straight seam
In the form section:
- square, rectangular;
- oval or round.
For the purpose regarding withstanding pressure:
- water and gas supply tube
- special purpose
Pipe restored — are widely represented on the market of secondary raw materials. In the factory is high-quality restoration of pipes used for use in less aggressive conditions. .
Welded pipe is the most practical and frequently used among the other pipes. Made from sheet metal, which is bent on a special machine in round, oval or square. Butt-welded. If the sheet is bent along the length and weld in a straight line, get longitudinally welded pipe. And when the spiral twisting of the tape after welding get spiral welded pipe.
By pulling a metal piece on a special machine to produce seamless pipe. This is the most popular type of hire Technologically, it consists of the following steps. In the first stage, a special preparation in the form of blanks is heated in a special oven. It is rounded and elongated shape. Next is the firmware, the temperature of heating increases, and through the finished disc in a special machine dragged a steel rod of the required diameter. Hot pipe is additionally rolled on pipe mill, forming the walls and giving the product a smooth shape. In the final stage of the inserted rod is removed.
Cold rolled steel pipe rolling
Technology cold-rolled tubular steel allows the pipe with more precise settings and more thin walls. In this method, the finished hot rolled pipe is sent for further machining. To achieve the necessary parameters allows high plasticity of hot iron and steel alloys. The tube was placed in a special machine, which by means of the rolls stretches the pipe. This reduces the wall thickness to the required parameters and generates exactly the given length of the workpiece, are simultaneously simulated and the cross section of the pipes — oval, square, rectangle.
The first stage is the melting of metal to a liquid state. Further cast iron pipe cast in a stationary or rotating form. In the first case, formed from sand core sample, into which is poured molten metal. After cooling sand mold is broken and she gets the product. In stationary form this files most often cast radiators and connecting fittings for joining pipes in the same system. In the second case, liquid iron is poured into a spinning shape, the tube is formed under the influence of centrifugal forces. In the future, to achieve more accurate dimensions of the pipe subjected to hot working. To protect from corrosion the walls of cast iron pipes treated with mastic.
Most often used method of galvanizing. Recently widely used polymer coatings staining with special varnishes. For polymeric coatings include, PPE, PPU, MAS insulation. This not only gives a corrosion and heat protection.
PMI (TYPE of INSULATION) is a vapor-permeable complex design — is a variable density cross section. Has 3 layers.
- Anti-corrosion layer with high adhesion to the material of the pipe protects the pipe wall from corrosion.
- Insulating layer with a porous structure can have a different density depending on operating conditions
- Waterproofing coating — dense layer is made as a shell that protects the insulation from mechanical damage and water.
Pipe foam is protected by a layer of foam polyurethane (PUR) polyethylene shell. These pipes are used in air networks or stacked into the ground without creating channels.
Pipe VUS protected with extruded polyethylene reinforced type, which refers to the latest developments for the protection of pipelines. Extruded polyethylene has high adhesion to the pipe wall, and the outer polyethylene layer provides mechanical protection. These pipes are used in various industries and construction.
Today, the pipe metal has the wide application in the modern industrial market. The most popular pipe (VGP) water-gas supply or galvanized water-gas supply. In the housing sector, it is indispensable for the installation of water pipes, heating systems and gas supply. In exploration, during the drilling of wells for oil, gas, water, heat exchanger in the high pressure circuits, the construction of gas and oil pipelines use steel tubes hot or cold deformed.
Rectangular pipes are indispensable for the creation of different constructions in civil and industrial construction. Today they are especially popular on the market.
Oval and cast iron pipe
Steel tube oval section help to realize various design projects are used in the automotive industry. Cast iron pipes installed in the sewer systems and low pressure. Note that today appeared on the market of ductile iron pipe is of high quality, which is designed for operation under high pressure.
Today is particularly relevant pipe, protected from corrosion of the type PPE, PPU, VSL. They have additional thermal protection, it is cheaper than stainless steel tubes and their life — not less. They are relevant in the systems of heat supply, installation of water pipelines high pressure pipelines. They can be laid in the ground without the creation of headers, they are resistant to soil and atmospheric moisture. They can be laid in sea water.