Name: ASTM A254 BHG2 Bundy Tube Instrumentation Tube Copper-Brazed Steel Tubing
Brand: Yuhong Group Co.,Ltd
SKU: ASTM A254 BHG2 Bundy TUBE
Price: 1000000.00 USD
Availability: InStock

A Comissão considerou que o auxílio não foi concedido em conformidade com o artigo 3.o, n.o 1, do Regulamento Financeiro.

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ASTM A254 BHG2 Bundy Tube Instrumentation Tube Copper-Brazed Steel Tubing

Detalhes do produto:

Lugar de origem:	CHINA
Marca:	YUHONG
Certificação:	ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015
Número do modelo:	ASTM A254 BHG2 Bundy TUBE

Condições de Pagamento e Envio:

Quantidade de ordem mínima:	1000kgs
Detalhes da embalagem:	Caixa de madeira, saco tecido
Tempo de entrega:	7 dias
Termos de pagamento:	L/c, t/t

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Descrição de produto detalhada

Nome do produto:	Bundy Tube	Padrão:	ASTM A254, ASME SA254
Material:	BHG2	Grossura:	0,02 polegada a 0,04 polegadas
OD:	0,187 polegada a 0,5 polegadas	Superfície:	Cobre revestido
Processo:	Rolamento frio	Tipo:	Erw
Fim:	Fim liso / fim inclinado	Aplicativo:	Peças de veículo, geladeira, linhas de freio, linhas de combustível, linhas automáticas de retorno d
Destacar:	ASTM A254 BHG2 Bundy tube , copper-brazed steel instrumentation tubing , copper alloy Bundy tube

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	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)