Copper was one of the first metals mastered by people. Iron came much later. Today, copper alloys are used less than before, but there are production areas where copper is leading the way. Because of its corrosion resistant, high conductivity, seamless copper tube circular cross-sections are indispensable for heating, air-conditioning, refrigeration circuit, domestic, gas and water supply of country cottages. Copper alloys are the principal materials for internal wiring of gas pipes in countries such as Australia, UK, France. While Hong Kong, Sweden, the United Kingdom, the United States used copper alloys as the basic materials, water, and Sweden, and the UK — for steam heating pipes.
The shape of the pipe they can be classified into round, square and rectangular sections. According to the method of production: cold rolled steel «D», extruded, drawn -«G». Accuracy of production: P — increased accuracy, «N» is normal. By state of material: solid — the «T»; soft «M»; semi — «P»; soft, high plasticity — «L»; solid high-strength — «H»; semi-ruggedized «R». By the length: dimensional — «KD»; random length — «NDL»; in the Bay — «BT».
|The chemical composition of the material (in parameters %)|
|Brand copper alloy||Iron||Nickel||Sulfur||Copper||Arsenic||Lead||Oxygen||Antimony||Bismuth||Tin||Phosphorus||Zinc||Silver|
|Mark M1||≤ 0.005||≤ 0.002||≤ 0.004||at least 99.9||≤ 0.002||≤ 0.005||≤ 0.05||≤ 0.002||≤ 0.001||≤ 0.002||≤ 0.004||≤ 0.003|
|Mark M 1P||≤ 0.005||≤ 0.002||≤ 0.005||at least 99.9||≤ 0.002||≤ 0.005||≤ 0.01||≤ 0.002||≤ 0.001||≤ 0.002||0.002−0.012||≤ 0.005|
|Mark M 2||≤ 0.05||≤ 0.2||≤ 0.01||at least 99.7||≤ 0.01||≤ 0.01||≤ 0.07||≤ 0.005||≤ 0.002||≤ 0.05|
|Mark M 2P||≤ 0.05||≤ 0.2||≤ 0.01||at least 99.7||≤ 0.01||≤ 0.01||≤ 0.01||≤ 0.005||≤ 0.002||≤ 0.05|
|Mark M 3||≤ 0.05||≤ 0.2||≤ 0.01||at least 99.5||≤ 0.01||≤ 0.05||≤ 0.08||≤ 0.05||≤ 0.003||≤ 0.05|
|Mark M 3P||≤ 0.05||≤ 0.2||≤ 0.01||at least 99.5||≤ 0.05||≤ 0.03||≤ 0.01||≤ 0.05||≤ 0.003||≤ 0.05||from 0.005 to 0.06|
The main advantage of copper tube and fitting — exceptional resistance to corrosion, including soil. They are distinguished by high plasticity, corrosion resistance, electrical and thermal conductivity. They are easily welded, soldered, comply with strict Sanitary standards. They are characterized by such properties as durability, ability to endure considerable difference of temperatures, pressures and adverse weather events. On their inner surfaces do not exist colonies of fungi and bacteria, copper pipes do not react with chlorinated water, have extremely low resistivity (less only the silver pipes).
Copper pipe is relatively cheap and very high-tech. They are easily cut, drilled, stamped, easy to install, — all this makes these pipes extremely beneficial to use. They work in a wide temperature range. Excellent performance characteristics make copper pipe demand in a variety of industries.
The strength of such pipes if to compare with steel, much less.
The pipes are manufactured from grades M1, M3, M2 with chemical composition according to GOST 859−2001 hard, soft and drawn. Matte surface with standard quality finishes, the normal precision when manufacturers diameter and wall thickness. Sampling for inspections of the chemical. formulations normalizes GOST 24231−80. In the production of copper pipe adhere to the following GOST: 617−90 (thick water pipe), 16774−78 (square pipe and rectangular), 2624−77 (capillary tube) 20900−75 (waveguide pipe), 11383−75 (thin walled tube), 17217−79 (pipe of copper-Nickel alloy MNZH5−1); 21646/2003 (tube for heat exchangers and heating devices). Tube copper for kondicionirovanie made in accordance with the technical specifications 184450−106−181−2006. Chemical composition of material fully complies with the requirements of national and international quality standards.
According to the following GOST produced pipe: a thick-walled General purpose — 617−2006; thin-walled, drawn — 11383−75. The curvature, roundness and slant of the cut should correspond to GOST 26877−91.
Fittings for connecting pipes made of copper of the same brands. Connections are made either by high temperature capillary rations (strength of such joints strength of the pipe itself) or press fitting (crimped press tool). The last connection is faster.
Heating and gas supply on the basis of copper tubes significantly reduces the overhead during installation. For plumbing, it is important that this pipe is not affected by chlorinated water. In addition, copper pipes have bakteriostatichnosti, i.e., inhibit the growth of bacteria. Time trouble-free operation of such tubes ranges from 60 to 110 years. Pipe used in the creation of HVAC equipment, air conditioners, refrigerators, decorative items, brass instruments. It is demanded in the electric power industry, housing and utilities, engineering, construction. Owing to durability, corrosion resistance, harmlessness to health — copper pipe occupies a special place in drinking water. During the construction of technical communication and health systems prefer pipe of the same material — substantially reduced costs. Very often copper pipe is not a final product, but only the workpiece for cutting, pressing, punching, production of parts rolling.
|The diameters of pipes in mm.||Wall thickness in mm.||Units of measurement||Prices for 1 kg.|
|Pipe copper M1 hard and soft|
|4 ÷ 6||0,5 ÷ 1||pounds||contractual|
|8 ÷ Z2||0,5 ÷ 10||pounds||contractual|
|Pipe copper M1 pressed|
|30 ÷ Z2||5 ÷ 6||pounds||contractual|
|Copper tubes M2 of hard and soft|
|4 ÷ 6||0,5 ÷ 1||pounds||contractual|
|8 ÷ 36||0,5 ÷ 10||pounds||contractual|
|Copper tubes extruded M2|
|S0 ÷ P6||5 ÷ 7||pounds||contractual|
|≤ 10||0,5 ÷ 10||pounds||contractual|
Packing, transport, storing and temporary corrosion protection are produced in accordance with GOST 9.510−93.
|Names of copper pipe||According To GOST||According to technical conditions||Marking pipe||The size parameter|
THAT 48−0810−5 DIGITS
THAT 48−0810−5 DIGITS
|5.0 to 60хЗ0−280x1500−4000|
|0, H5−1,6x1,2−2,75 XL|
|For air conditioner||
|ТУ48−0814−120−2002||0, H5−2x4.5 to 10x L|
«To» high accuracy curvature;
«B» — increased accuracy in length;
«U» — extended length in the Bay.
The pipe can be tanytym way of seamless billet «D»; or from welded blanks «S»: soft «M» semi-hard «P» or a hard «T». The pipe can be: increased flexibility with the marking «PP»; increased strength marked with «PT»
With the welded billet, — «KD» multiple lengths;
— «R» any billet. — «BT» in the Bay;
— «G» extruded billet, — «MD» dimensional;
— «L» with high ductility, — «ND»: non-standard;
Examples of marking: pipe:
Pipe «DCMM» 45/2,5/З000 M1R GOST 21646/2003. This is a tube of circular cross-sections, drawn from soft copper grade «M1R» with an outer diameter of 45 mm. and a wall thickness of about 2.5 mm, length up to 3 m.
Pipe «DKRNT» З8/1,5/2000КД MNZH5−1 GOST 17217/79. This tube alloys «MNZH5−1», cold normal accuracy, solid with an external diameter of 38 mm, a wall thickness of 1.5 mm. and a multiple of a length of 2 m
|Markirovka pipe||Nickel+Cobalt||Iron||Carbon||Silicon||Manganese||Sulfur||Phosphorus||Copper||Arsenic||Lead||Zinc||Antimony||Bismuth||Tin||The admixture|
|«MNZH5−1»||5÷6,5||1÷1,4||0÷0.0 S||0÷0.15||0.S÷ 0.8||0÷0.01||0÷0.04||90.6÷ 9З.7||0.01||0÷0.005||0÷0.5||0÷0.005||0÷0.002||0.25÷0.1||≤0.7|
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