3A21 Aluminium Pipe and Tube Electrical Bus Conductors

• Customization: Available
• Type: Decoration Aluminium Profile, Transport Aluminium Profile, Industrial Aluminium Profile, Outdoor Substations
• Shape: Square/Round/Flat/or as Customers′ Drawing
• Model NO.: 3A21
• Grade: 1000 Series
• Temper: O/H18
• Alloy: Alloy
• Surface Finishing: Mill Finish/Polished/Anodizing/Brushing
• Alloying Ingredient: 3A21
• Certification: CE, ISO, ISO9001:2008/SGS
• Polished Aluminum Profile: Mechanical Polishing
• Service: OEM and ODM
• Outer Diameter: 60mm - 450mm
• Transport Package: Ep Paper Inside, Craft Paper/Pallet Outside.
• Specification: According to Customer Requirement
• Trademark: Chalco Aluminum
• Origin: Henan China
• HS Code: 7604210000
• Production Capacity: 10000mt/Month

Product Description

3A21 Aluminium Pipe And Tube Electrical Bus Conductors 

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

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)(20ºC)	2.74
Melting point ºC	620-640
Thermal conductivity, (K /ºC x cm x s)	0.46
Electrical Conductivity IACS%	41
Poisson's Coefficient μ	0.305
20ºC Temperature coefficient of electrical  resistance I/ºC	0.0042
20ºC Electrical Resistivity  β,Ω.	0.043IU

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