The Silmet ASTM product line is available in the most common types: K, L, M AND DWV.
Characteristics
The Silmet ASTM product line is able to satisfy all the requirements for the hydraulic/plumbing supply and for DWV applications.
Supply
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.
The tubes that meet these standards can be supplied in any of several tempers:
O50 : Light Annealed
O60: Soft Annealed
H55: Light Drawn
H58: Drawn
H80: Hard Drawn
and in coils and straight lengths, in lengths recommended in the standards and / or requested by the customer.
| Packing | in cardboard boxes on wooden pallet |
| Indicative weight | 500 kg |
| Cardboard box of | 40 cm x 40 cm x 20 mm (W x L x H) 60 cm x 60 cm x 20 mm (W x L x H) |
| Packing | Straight lengths in bundles and protected with plastic film |
| Indicative weight | 500 kg |
Usage and Directives
The tubes that meet these standards can be supplied in any of several tempers:
ASTM B75: Suitable for general engineering applications.
ASTM B88: Water Tube.
ASTM B280: Air Conditioning and Refrigeration Field Service.
ASTM B819: Medical Gas Systems.
ASTM B837: Natural gas and liquefied petroleum (lp) gas fuel distribution system.
Technical sheets
| Symbol | Cu |
| Atomic number | 29 |
| Atomic weight | 2,6625 |
| Crystalline structure | cubic with faces centred with the side of the cube 3,6078 Å |
| Melting temperature | 1083° C |
| Boiling temperature | 2595° C |
| Density at 20° C | 8,94 g/cm 3 |
| Coefficient of linear thermal expansion at 20° C | 0,0000165 · K-1 |
| 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 mm2/m |
| Electric resistivity temperature coefficient at 20° C | 0,00393 • K-1 |
| Alloy for the production of ASTM Copper Tubes | C12200 (Cu-DHP) (Cu = 99.90% min. - P = 0.015 ÷ 0.040%) |