Technological Copper Evolution

IndexAbout UsAdvantages of CopperCopper TubesCopper StripQualityQuotationContactsNEWS

EsencoRICEMedicaLLevel Wound CoilCoated
 

 

QUALITY: THE SILMET LIFE STYLE

All Silmet Lewel Wound Coils for industrial use and ACRs are produced in compliance with all international standards and also with the specific requirements of customers.
Particular attention is paid to dimensional uniformity, uniformity of the physical state, the absence of faults and internal cleanliness.
The length, approximate weight, number of faults present, dimensions and all references aimed at guaranteeing the traceability of the product with regard to laboratory tests carried out in compliance with stringent sampling and control plans implemented during production, are highlighted for each individual coil.
The internal cleanliness of the tubes is considerably above the limit of 0.038 g/m.

The Silmet Quality System is certified in compliance with standard
ISO 9001:2008 and the Quality Service is assigned to highly qualified, constantly updated personnel with functions that are independent from production departments; they use the most sophisticated laboratory and production control equipment.
All phases of the production process, starting from acceptance of raw materials, are subject to very severe sampling and control plans aimed at guaranteeing that the end products achieve very high quality standards.

Silmet S.p.A. has been manufacturing copper tubes for usage in water and gas tubes in sanitary and heating applications and in the industrial sectors since 1973. Over recent years, due to its excellent conductivity, machinability, resistance to corrosion and user-friendliness, the copper tube has made a name for itself as the ideal product for air-conditioning/refrigeration equipment and for the heating industry.
Silmet has always been aware of the needs of the market and is constantly up-to-date technologically.
With all these things in mind, in order to help its customers with the growing trend in production automation and to be able to satisfy their requirements, Silmet is equipped with cutting-edge Level Wound Coils production plants.

 


 COPPER CHEMICAL/PHYSICAL/TECHNOLOGICAL PROPERTIES
                                                                                   
 Symbol  Cu
 Atomic number  29
 Atomic weight  2.6625
 Crystalline structure  cubic with faces centred with the side of the cube 3.6078
 smelting temperature  1083 C
 Boiling temperature  2595 C
 Volumic mass (density) at 20 C  8.94 g/cm
 Coefficient of linear thermal expansion at 20 C  0.0000165 Kˉ
 Solidification shrinkage  4.92%
 Specific heat at 20 C  385 J/kg K
Latent smelting heat  205 kj/kg
 Thermal conductivity at 20 C  391 W/m K
 Electric resistivity at 20 C annealed physical state  0.017241 Ω mm/m
 Electric resistivity temperature coefficient at 20 C  0.00393 Kˉ
 Alloy for the production of LWC  Cu-DHP CW024A (Cu = 99.90% min. - P = 0.015 0.040%)
                                                                                   
                                                                                   
 MECHANICAL CHARACTERISTICS OF COPPER AND LOW ALLOY COPPER ALLOYS - EN 12449
                                                                                   
designation thickness resistance to yield at elongation hardness
material    tensile strength  0.2%    
state t Rm Rp0,2 A HV HB
  mm N/mm N/mm %    
  max.   min. max. min. min. max. min. max
R200 20 200 - 110 40 - - - -
H040 20 - - - - 40 65 35 60
                                                                                   
                                                                                   
 TOLERANCES ON EXTERNAL DIAMETER IN COMPLIANCE WITH EN 12449 - TUBES IN LWC
                                                                                   
external nominal diameter tolerances on nominal diameter
mm mm
greater than up to and including applicable to mean diameter applicable to any diameter
including deviation from circular form
3 6 0,06 0,30
6 10 0,06 0,50
10 20 0,08 0,70
20 30 0,12 0,90
                                                                                   
                                                                                   
 TOLERANCES ON THICKNESS ACCORDING TO EN 12449 - TUBES IN LWC
                                                                                   
 external nominal diameter tolerances on nominal thickness t
mm %
greater than up to and including t from 0.3 mm up to t greater than 1 mm up to
and including 1 mm and including 3 mm
3 40 15 13
                                                                                   
                                                                                   
                                                                                   
                                                                   
    diameters mm 24                                                              
     
 
                                                         
    22                                                              
                                                                 
    20                                                              
                                                                 
    18                                                              
                                                                 
    16                                                              
                                                                 
    14                                                              
                                                                 
    12                                                              
                                                                 
    10                                                              
                                                                 
    8                                                              
                                                                 
    6                                                              
                                                                 
                                                                                   
                      0,28 0,00 0,50 0,60 0,70 0,80 0,90 1,00 1,10 1,20 1,30 1,40 1,50          
                      thicknesses mm      
                               
                                                                                   
 Even if not included in this table, measurements must be agreed when the order is made                    
LWC tubes can be delivered WITH or WITHOUT cardboard coils.
The coils are stacked on wooden pallets and secured with a sheet of heat-shrunk plastic. The practical dimensional limits of the pallets are  2.1 m in height and 1.5 tons in weight.
Any other packing requirement can be assessed when the order is made.

LWC Copper Tube
english - 75 kB