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| उत्पत्ति के प्लेस: | चीन |
| ब्रांड नाम: | YUHONG |
| प्रमाणन: | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015 |
| मॉडल संख्या: | ASTM A254 BHG2 बंडी ट्यूब |
| न्यूनतम आदेश मात्रा: | 1000kgs |
|---|---|
| पैकेजिंग विवरण: | लकड़ी के मामले, बुने हुए बैग |
| प्रसव के समय: | 7 दिन |
| भुगतान शर्तें: | एल/सी, टी/टी |
| प्रोडक्ट का नाम: | बंडी ट्यूब | मानक: | एएसटीएम A254, ASME SA254 |
|---|---|---|---|
| सामग्री: | BHG2 | मोटाई: | 0.02 इंच से 0.04 इंच |
| आयुध डिपो: | 0.187 इंच से 0.5 इंच | सतह: | तांबा लेपित |
| प्रक्रिया: | कोल्ड रोलिंग | प्रकार: | ईआरडब्ल्यू |
| अंत: | प्लेन एंड्स / बेवेल्ड एंड्स | आवेदन: | वाहन भाग, रेफ्रिजरेटर, ब्रेक लाइनें, ईंधन लाइनें, स्वचालित गियरबॉक्स रिटर्न लाइनें, आदि |
| प्रमुखता देना: | ASTM A254 BHG2 Bundy tube,copper-brazed steel instrumentation tubing,copper alloy Bundy tube |
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ASTM A254 Copper-Brazed Steel Tubing BHG2 Bundy Tube
A Bundy tube is not just any steel tube; it's defined by its unique manufacturing process, which gives it exceptional properties. Its unique double-wall, copper-brazed construction gives it an unparalleled combination of strength, fatigue resistance, and leak-proof integrity, making it the undisputed first choice for the most critical hydraulic and fuel lines in vehicles.
Strip Preparation: A low-carbon steel strip (typically ASTM A254 Grade 2) is first coated with a layer of copper.
Double Rolling: This copper-coated strip is then passed through a series of rolls that form it into a seamless-looking, double-walled tube. The strip is rolled twice around its own longitudinal axis, creating a tight, overlapping seam.
Copper Brazing: The tube is then passed through a continuous furnace with a controlled atmosphere (a hydrogen-nitrogen mix). The heat melts the copper coating at the seam, which acts as a brazing filler metal. Capillary action draws the molten copper into the entire length of the seam, creating a strong, uniform, and leak-proof metallurgical bond.
Sizing and Cutting: The brazed tube is then cooled, drawn through dies to achieve precise final dimensions (OD, wall thickness), and cut to length.
Dimensional Accuracy
| OD | Tolerance | Wall Thickness | Tolerance |
| <4.76 | ±0.05 | 0.5 | ±0.07 |
| 4.76-8 | ±0.08 | 0.5-0.7 | ±0.08 |
| 8-12.7 | ±0.10 | 0.7-1 | ±0.09 |
| >12.7 | ±0.12 | 1-1.3 | ±0.1 |
*Custom Sizes: We are capable of fabricating Bundy tube sizes which are not regularly used. By combining one or more processes of cold draw and annealing, Bundy tubes can be made to many other sizes to meet demands for special applications.
General Size and Tolerance
| Outer diameter(φ) |
Diameter tolerance (mm) |
Wall thickness(mm) | Wall thickness tolerance(mm) | Pressure resistance(MPa) | Burst pressure (MPa) |
| 4.76(3/16″) | ±0.05 | 0.7 | +0.05/-0.08 | 41.2 | 110 |
| 6 | ±0.08 | ±0.08 | 32.7 | 85 | |
| 6.35(1/4″) | ±0.08 | ±0.08 | 30.9 | 78 | |
| 8(5/16″) | ±0.1 | ±0.08 | 24.5 | 67.5 | |
| 9.52(3/8″) | ±0.1 | ±0.08 | 20.6 | 57 | |
| 10 | ±0.1 | ±0.08 | 19.6 | 55 | |
| 12 | ±0.1 | ±0.08 | 16.3 | 32 | |
| 10 | ±0.1 | 1 | ±0.08 | 28 | 65 |
| 12 | ±0.1 | ±0.08 | 23.3 | 56 |
Comparison with Alternative Tubing
| Feature | ASTM A254 BHG2 Bundy Tube | SAE J525 Single-Wall Steel Tubing | Nylon / Plastic Tubing |
|---|---|---|---|
| Construction | Double-wall, copper-brazed | Single-wall, welded or seamless | Single-wall, extruded |
| Strength | Very High for its wall thickness | Good, but requires thicker walls for same pressure | Low to Moderate |
| Weight | Low | Higher (for equivalent strength) | Very Low |
| Fatigue Resistance | Excellent | Good | Can be susceptible to cracking |
| Leak Proofness | Excellent (metallurgical bond) | Good (potential for weld defects) | Good (if no damage) |
| Primary Use | Critical Safety Systems (Brakes, Fuel) | Less critical fluid lines (e.g., vent lines) |
Applications
1. Automotive & Transportation (Largest Application)
2. Refrigeration & Air Conditioning
3. Heat Exchangers
4. Aerospace & Aviation
5. Industrial Applications
6. Hydraulic Control Systems
7. Instrumentation Tubing
व्यक्ति से संपर्क करें: Ms Vivi
दूरभाष: 0086-13023766106
फैक्स: 0086-574-88017980
