Copper Pipes, Tubes, Coils & Fittings
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Electrical Copper Bus Pipes for Power & Distribution Systems
Product Overview
Electrical Copper Bus Pipes supplied by R V Metal Corporation are manufactured from high-conductivity Copper ETP (C11000) and Copper DHP (C12200) grades to ensure exceptional electrical performance and long-term durability. These pipes are widely used in power distribution systems, transformer bushings, switchgear panels, high-current busbar systems, and earthing networks where superior conductivity and mechanical reliability are essential. With smooth inner surfaces, precise dimensional control, and excellent formability, R V Metal’s copper bus pipes support efficient current flow, reduced energy loss, and improved thermal stability. Suitable for bending, flaring, brazing, and plating applications, our copper bus tubes meet leading global standards for electrical engineering and high-load power applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Material Grades | Copper ETP (C11000), Copper DHP (C12200) |
| Purity | ETP: Min. 99.90% Cu · DHP: 99.90% Cu (Deoxidized with Phosphorus) |
| Electrical Conductivity | ETP: ≥ 100% IACS · DHP: 85–90% IACS |
| Temper / Condition | Hard Drawn (HD), Annealed (Soft), Half-Hard |
| Manufacturing Process | Seamless Drawn Copper Tube / Extruded Copper Tube |
| Surface Finish | Bright Natural Copper / Mill Finish / Custom Electroplated |
| Outer Diameter Range | 12 mm to 250 mm (Custom sizes available) |
| Wall Thickness Range | 1.0 mm to 20 mm (As per current rating & design) |
| Length Options | Standard 3M / 6M · Custom cut-to-length available |
| Electrical Resistance | < 0.017241 Ω·mm²/m (for ETP Grade) |
| Thermal Conductivity | ETP: ~390 W/m·K · DHP: ~330 W/m·K |
| Standards (Applicable) | ASTM B111 · ASTM B152 · IS 191 · BS EN 12449 · IEC 60228 |
| Applications | Busbars, Transformer Bushings, Switchgear, Earthing, Power Distribution |
Chemical Composition
| Element | Copper ETP (C11000) | Copper DHP (C12200) |
|---|---|---|
| Copper (Cu) | ≥ 99.90% | ≥ 99.90% |
| Oxygen (O) | 0.02 – 0.04% | < 0.001% (Deoxidized with Phosphorus) |
| Phosphorus (P) | — | 0.015 – 0.040% |
| Silver (Ag) | ≤ 0.003% | ≤ 0.003% |
| Lead (Pb) | ≤ 0.005% | ≤ 0.005% |
| Iron (Fe) | ≤ 0.005% | ≤ 0.005% |
| Total Impurities | ≤ 0.06% | ≤ 0.06% |
UNS Codes & Grades
| Copper Grade | UNS Code | Common Name | Typical Use in Bus Pipes |
|---|---|---|---|
| ETP Copper | C11000 | Electrolytic Tough Pitch Copper | Preferred for electrical bus pipes due to highest conductivity (≥ 101% IACS) |
| DHP Copper | C12200 | Deoxidized High Phosphorus Copper | Used where better weldability/formability is needed; good conductivity (≈ 90% IACS) |
Mechanical, Physical & Fabrication Properties
| Property | ETP Copper (C11000) | DHP Copper (C12200) | Notes / Relevance |
|---|---|---|---|
| Electrical Conductivity | ≥ 101% IACS | 85–90% IACS | ETP is preferred for high-current bus ducts |
| Tensile Strength (Annealed) | 205–250 MPa | 200–240 MPa | Higher strength available in drawn condition for bus pipes |
| Tensile Strength (Hard-Drawn) | 260–315 MPa | 250–300 MPa | Used where rigidity in long bus runs is required |
| Yield Strength (0.5% Offset) | 60–110 MPa | 55–95 MPa | Affects bending and fabrication tolerance |
| Elongation (Annealed) | 35–45% | 35–45% | High elongation supports bending and flaring |
| Hardness (HV5) | 45–65 HV | 40–60 HV | Higher hardness available on request for switchgear |
| Thermal Conductivity | 386 W/m·K | 310–330 W/m·K | Critical for heat dissipation in electrical systems |
| Coefficient of Thermal Expansion | 16.8 × 10⁻⁶ /°C | 17.0 × 10⁻⁶ /°C | Important for long-run busbar expansion |
| Density | 8.94 g/cm³ | 8.92 g/cm³ | Affects overall weight of bus pipe systems |
| Bendability | Excellent | Excellent | DHP preferred for heavy fabrication & brazing |
| Brazing / Welding | Good (limited oxygen content) | Excellent (phosphorus deoxidized) | DHP is the best for welding and brazing |
| Corrosion Resistance | High | High | Suitable for indoor and outdoor bus systems |
Common Names & International Identifiers
| Grade | Common Names | International Identifiers | Notes |
|---|---|---|---|
| ETP Copper (C11000) |
Electrolytic Tough Pitch Copper Pure Copper 99.90% Electrical Grade Copper Busbar Copper / Bus Pipe Copper |
ASTM B5 / B152 UNS C11000 EN CW004A JIS C1100 IS 191 (Cu-ETP) |
Preferred for high current conductivity (101% IACS) |
| DHP Copper (C12200) |
Deoxidized High Phosphorus Copper Medical / Refrigeration Grade Copper Oxygen-Free Type Copper (for fabrication) Plumbing & HVAC Copper |
ASTM B68 / B75 UNS C12200 EN CW024A JIS C1220 IS 191 (Cu-DHP) |
Best for brazing, welding & fabricated bus ducts |
| High Conductivity Copper Bus Material |
HC Copper HC Bus Pipe Copper Conductivity Grade Copper |
ASTM B188 / B187 IEC 60228 Class 2/5 (for conductors) IS 613 EN 13601 |
Used for busbar, earthing, switchgear & electrical panels |
Standards & International Equivalents
| Standard Body | Standard / Specification | Applicable Copper Grade | Scope / Description |
|---|---|---|---|
| ASTM (USA) |
ASTM B5 – Copper Bus Bar ASTM B152 – Copper Sheet, Strip, Plate ASTM B188 – Copper Bus Pipe (Hard-Drawn & Annealed) |
C11000 (ETP), C12200 (DHP) | Covers electrical bus bars, tubes, plates used in power distribution, switchgear, substations & heavy electrical installations. |
| UNS Designation | UNS C11000 (ETP Copper) UNS C12200 (DHP Copper) |
ETP & DHP | Unified Numbering System for copper and copper alloys. |
| IEC (International) | IEC 60228 – Conductors of Insulated Cables (Class 1–5) | High Conductivity Copper | Defines conductivity requirements for electrical conductors used in busbars, earthing & LV/MV electrical systems. |
| EN / European | EN 13601 – Copper Rod, Bar & Busbar EN CW004A – ETP Grade EN CW024A – DHP Grade |
CW004A, CW024A | European specification for copper busbars, tubes & profiles with strict mechanical and electrical properties. |
| IS Standards (India) |
IS 613 – Copper Rods & Bars for Electrical Purposes IS 191 – Copper Strips & Tubes (ETP & DHP Copper) IS 12449 – Copper Bus Bars / Strips |
ETP Copper, DHP Copper | Indian standards applicable for power distribution, transformer bushings, panel boards, earthing & industrial bus ducts. |
| JIS (Japan) | JIS C1100 – ETP Copper JIS C1220 – DHP Copper |
C1100, C1220 | Japanese standards widely used for precision bus pipes, high-conductivity tubes & fabricated electrical components. |
| BS / UK | BS EN 12449 – Copper Tubes for General Purposes | CW004A, CW024A | British/European standard covering copper tubes for electrical and general industrial applications. |
Applications
| Application Category | Specific Use Cases |
|---|---|
| Power Distribution Systems | Switchgear & panel boards, power control centers (PCC), motor control centers (MCC), distribution boards, bus ducts, rising mains, and industrial power distribution lines. |
| Electrical Substations | Transformer connections, earthing/bonding systems, control wiring, LV/MV/HV bus interconnections, and neutral links. |
| Industrial Electrical Equipment | Generators, UPS systems, battery banks, VFD panels, rectifiers, and high-current process equipment. |
| Renewable Energy Systems | Solar inverter busbars, solar combiner boxes, wind turbine junctions, and battery energy storage system (BESS) bus links. |
| Heavy Engineering & Infrastructure | Railways, metro systems, airports, steel plants, cement plants, refineries, petrochemical industries & high-load electrical installations. |
| Earthing & Lightning Protection | Earth bars, equipotential bonding, grounding networks, lightning protection down conductors. |
| Custom Fabricated Electrical Components | Bending, punching, drilling & shaping for custom copper bus assemblies, connectors, terminal plates & fabricated electrical parts. |
Standard Copper Tube Dimensional Chart
| Regular Copper Bus Tube | |||||
|---|---|---|---|---|---|
| Nominal Size | Wall Thickness (mm) | Outside Diameter (mm) | Theoretical Weight (lb/ft) (kg/m) | Form | Temper |
| 3/4" | 2.90 | 26.70 | 1.30 (1.93) | 5m / 4m / 6m / 5.8m Straight Form |
H80 / O60 |
| 3/8" | 2.29 | 17.10 | 0.641 (0.954) | ||
| 1/4" | 2.08 | 13.70 | 0.457 (0.680) | ||
| 1/2" | 2.72 | 21.30 | 0.955 (1.42) | ||
| 1-1/4" | 3.71 | 42.20 | 2.69 (4.00) | ||
| 1" | 3.20 | 33.40 | 1.82 (2.71) | ||
| 2" | 3.96 | 60.30 | 4.22 (6.28) | ||
| 1-1/2" | 3.81 | 48.30 | 3.20 (4.76) | ||
| 3" | 5.56 | 88.90 | 8.75 (13.00) | ||
| 2-1/2" | 4.75 | 73.00 | 6.12 (9.11) | ||
| Strong Copper Bus Tube | |||||
|---|---|---|---|---|---|
| Nominal Size | Wall Thickness (mm) | Outside Diameter (mm) | Theoretical Weight (lb/ft) (kg/m) | Form | Temper |
| 1/4" | 3.12 | 13.70 | 0.625 (0.930) | 5m / 4m / 6m / 5.8m Straight Form |
O60 / H80 |
| 3/8" | 3.23 | 17.10 | 0.847 (1.26) | ||
| 1/2" | 3.78 | 21.30 | 1.25 (1.86) | ||
| 3/4" | 3.99 | 26.70 | 1.71 (2.54) | ||
| 1" | 4.62 | 33.40 | 2.51 (3.73) | ||
| 1-1/4" | 4.93 | 42.20 | 3.46 (5.15) | ||
| 1-1/2" | 5.16 | 48.30 | 4.19 (6.23) | ||
| 2" | 5.61 | 60.30 | 5.80 (8.63) | ||
| 2-1/2" | 7.11 | 73.00 | 8.85 (13.20) | ||
| 3" | 7.72 | 88.90 | 11.80 (17.60) | ||
