1,3A21 Aluminium Aluminum Pipe and tube electrical bus conductors
1) Implementation standard: GB/T27676-2011 aluminum and aluminum alloy bus tube pipe conductor or ASTM B 317M-07
2) Product Alloy: 3A21
3) Product Temper: H14
4) The product is hollow tubular structure with glossy surface, beautiful appearance and uniform size.
5)The outer diameter is from 60mm to 450mm.
6)The Wall thickness from 3mm to 15mm.
7) The length of a single bus tube pipe conductor can reach up to 15 meters.
2.The Chemical composition and Mechanical properties of 3A21 Aluminium Aluminum Pipe and tube electrical bus conductors
3.The external diameter allowable deviation and wall thickness allowable deviation of
3A21 Aluminium Aluminum Pipe and tube electrical bus conductors
3.1 The external diameter allowable deviation (unit: mm)
3.2 The Wall thickness allowable deviation (unit: mm)
4.The main performance of 3A21 Aluminium Aluminum Pipe and tube electrical bus conductors as follows:
1) 3A21 Aluminium Aluminum Pipe and tube electrical bus conductors adopts hot-top casting seamless pipe tube etc a series of advanced technology, with smooth surface, high dimensional accuracy, high tensile strength, not easy to discharge and deformation, low power loss, equivalent to 40% of rectangular bus and cable;
2) 3A21 Aluminium Aluminum Pipe and tube electrical bus conductors has excellent machining, welding, conducting and heat resistance. The products were certified by the science and technology department and reached the international advanced level.
3) The convection heat dissipation condition is good, the temperature rise is low, the loss is small, the electrical conductivity is strong, the carrying capacity is big.
4) The installation area is small, and the combined busbar is the 1/3 of the soft conductor installation area.
5) The inner grain structure is compact, the corrosion resistance is strong,and it is not easy to ice coating, the ability to resist disasters is strong, and the service life is long.
6) Easy installation, beautiful appearance, safe, stable and reliable operation, convenient for maintenance.
5.The usage of 3A21 Aluminium Aluminum Pipe and tube electrical bus conductors:
3A21 Aluminium Aluminum Pipe and tube electrical bus conductors is mainly used as overcurrent conductor in power construction projects, such as conductor connection between power grid transmission conductor and transformer substation, jumper in transmission line, connection conductor in power equipment and high current DC ice melting device,It is a new conductor to replace the traditional rectangular, groove, bar-shaped bus and soft conductor.
It is one of the key equipment (materials) in power transmission and transformation system, and plays a vital role in the safe and reliable operation of power transmission and transformation system and power equipment.
6,Common tubular busbar, Liner tube & sealing ball size or sealing cover size.
1) Implementation standard: GB/T27676-2011 aluminum and aluminum alloy bus tube pipe conductor or ASTM B 317M-07
2) Product Alloy: 3A21
3) Product Temper: H14
4) The product is hollow tubular structure with glossy surface, beautiful appearance and uniform size.
5)The outer diameter is from 60mm to 450mm.
6)The Wall thickness from 3mm to 15mm.
7) The length of a single bus tube pipe conductor can reach up to 15 meters.
2.The Chemical composition and Mechanical properties of 3A21 Aluminium Aluminum Pipe and tube electrical bus conductors
| Alloy | Chemical component(%) | ||||||||||||
| Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Ni | Other | Al | |||
| Each | Total | ||||||||||||
| 3A21 | ≤0.6 | ≤0.7 | ≤0.2 |
1.0- 1.6 |
≤0.05 | -- | ≤0.1 |
≤ 0.15 |
-- | ≤0.05 | ≤0.10 | Remain | |
| Alloy | Temper | Mechanical properties | |||||
| Tensile Strength（Mpa） |
Yield strength （Mpa） |
Elongation (%) |
|||||
| standard value | measured value | standard value | measured value | standard value | measured value | ||
| 3A21 | H14 | ≥135 | ≥160 | ≥120 | ≥130 | ≥4 | ≥15 |
| Property / Alloy | 3A21 |
| Density（g/cm³）（20℃） | 2.74 |
| Melting point ℃ | 620-640 |
|
Thermal conductivity, （K /℃ x cm x s） |
0.46 |
| Electrical Conductivity IACS% | 41 |
| Poisson's Coefficient μ | 0.305 |
|
20℃ Temperature coefficient of electrical resistance I/℃ |
0.0042 |
| 20℃ Electrical Resistivity β，Ω.m㎡/m | 0.043 |
3.The external diameter allowable deviation and wall thickness allowable deviation of
3A21 Aluminium Aluminum Pipe and tube electrical bus conductors
3.1 The external diameter allowable deviation (unit: mm)
| Nominal external diameter | >50～75 | >75～120 | >120～150 | >150～200 | >200～250 |
| Normal level ± | 0.23 | 0.30 | 0.40 | 0.60 | 0.80 |
| High Precision level ± | 0.15 | 0. 20 | 0.30 | 0.50 | 0.70 |
3.2 The Wall thickness allowable deviation (unit: mm)
| Nominal Wall Thickness | >3.0～4.0 | >4.0～5.0 | >5.0～8.0 | >8.0～10 | >10～15 | |
|
Average wall thickness and Nominal Wall Thickness ± |
Normal level | 0.30 | 0.40 | 0.50 | 0.70 | 0.80 |
| High Precision level | 0.15 | 0.15 | 0.20 | 0.30 | 0.40 | |
|
Any wall Thickness and Nominal Wall Thickness ± |
Normal level | 0.40 | 0.50 | 0.60 | 0.80 | 1.00 |
| High Precision level | 0.20 | 0.20 | 0.30 | 0.40 | 0.50 | |
4.The main performance of 3A21 Aluminium Aluminum Pipe and tube electrical bus conductors as follows:
1) 3A21 Aluminium Aluminum Pipe and tube electrical bus conductors adopts hot-top casting seamless pipe tube etc a series of advanced technology, with smooth surface, high dimensional accuracy, high tensile strength, not easy to discharge and deformation, low power loss, equivalent to 40% of rectangular bus and cable;
2) 3A21 Aluminium Aluminum Pipe and tube electrical bus conductors has excellent machining, welding, conducting and heat resistance. The products were certified by the science and technology department and reached the international advanced level.
3) The convection heat dissipation condition is good, the temperature rise is low, the loss is small, the electrical conductivity is strong, the carrying capacity is big.
4) The installation area is small, and the combined busbar is the 1/3 of the soft conductor installation area.
5) The inner grain structure is compact, the corrosion resistance is strong,and it is not easy to ice coating, the ability to resist disasters is strong, and the service life is long.
6) Easy installation, beautiful appearance, safe, stable and reliable operation, convenient for maintenance.
5.The usage of 3A21 Aluminium Aluminum Pipe and tube electrical bus conductors:
3A21 Aluminium Aluminum Pipe and tube electrical bus conductors is mainly used as overcurrent conductor in power construction projects, such as conductor connection between power grid transmission conductor and transformer substation, jumper in transmission line, connection conductor in power equipment and high current DC ice melting device,It is a new conductor to replace the traditional rectangular, groove, bar-shaped bus and soft conductor.
It is one of the key equipment (materials) in power transmission and transformation system, and plays a vital role in the safe and reliable operation of power transmission and transformation system and power equipment.
6,Common tubular busbar, Liner tube & sealing ball size or sealing cover size.
| Main Bus Pipe Tube | Liner Bus Pipe Tube |
Sealing ball or Sealing cover |
||
|
OD (mm) |
Wall Thickness (mm) |
OD (mm) |
Wall Thickness (mm) |
OD (mm) |
| 80 | 4 | 71 | 3 | 70 |
| 90 | 5 | 79 | 4 | 79 |
| 100 | 5 | 89 | 5 | 89 |
| 110 | 5 | 99 | 5 | 99 |
| 120 | 5 | 109 | 5 | 109 |
| 130 | 7 | 115 | 7 | 115 |
| 150 | 7 | 135 | 7 | 135 |
| 150 | 10 | 129 | 10 | 129 |
| 170 | 7 | 155 | 7 | 155 |
| 170 | 10 | 149 | 10 | 149 |
| 200 | 10 | 179 | 10 | 179 |
| 250 | 10 | 229 | 10 |
229 |
