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| 원래 장소: | 중국 |
| 브랜드 이름: | YUHONG |
| 인증: | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015 |
| 모델 번호: | ASTM A254 BHG2 번디 튜브 |
| 최소 주문 수량: | 1000kg |
|---|---|
| 포장 세부 사항: | 나무로 되는 케이스, 길쌈된 부대 |
| 배달 시간: | 7 일 |
| 지불 조건: | l/c, t/t |
| 제품 이름: | 번디 튜브 | 기준: | ASTM A254, ASME SA254 |
|---|---|---|---|
| 재료: | BHG2 | 두께: | 0.02 인치 ~ 0.04 인치 |
| OD: | 0.187 인치 ~ 0.5 인치 | 표면: | 구리 코팅 |
| 프로세스: | 콜드 롤링 | 유형: | erw |
| 끝: | 평범한 단부 / 경사진 단부 | 애플리케이션: | 차량 부품, 냉장고, 브레이크 라인, 연료 라인, 자동 기어 박스 리턴 라인 등 |
| 강조하다: | 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
담당자: Ms Vivi
전화 번호: 0086-13023766106
팩스: 0086-574-88017980
