Zinc Coated Brazed double wall low carbon steel Bundy tube

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Product Overview

Description



Product Description


 












Bundy Tube

It covers single-wall, double-wall, copper-brazed steel tubing, zinc-coated steel tubing suitable for general engineering uses, particularly in the automotive, refrigeration, and stove industries for fuel lines, brake lines, oil lines, heating and cooling units, and the like. The tubing is available in either of two types, single strip or double strip. It is delivered in straight length or coil type.

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Electro-welded Single Wall Steel Tubing


Single wall steel tubing is the most common type of tubing used in household refrigeration applications. Bundy single wall tubing is manufactured by continuously forming a single low carbon steel strip into a tubular shape and welding the adjoining edges using a high frequency induction welding process. Through strict process controls, the internal weld bead is held to a minimum and all external flashing is removed. Corrosion resistant coatings are applied in-line to assure uniform coverage




























































 

Electro-welded Single Wall Steel Tubing

 


Dimension, mm


Tolerance, mm


Mechanical Properties


OD


WT


OD


WT


Tensile Strength, Mpa


Yield Strength, Mpa


Elongation, % 


4.00


0.50


 

±0.08

 

 

 

 


 

 

 

±0.08

 

 

 

 


 

 

 

290 min

 

 

 

 


 

 

 

180 min

 

 

 

 


 

 

 

25 min

 

 

 

 


4.76


0.60


4.76


0.65


6.00


0.60


6.00


0.65


8.00


0.60


8.00


0.65


8.00


0.70


 


Bundyweld Brazed Double Wall Tubing


Double wall tubing is produced by roll forming copper coated carbon steel strip into a double wrapped tubular shape . The formed tube is passed through a controlled atmosphere brazing furnace where it is fused together to produce a sealed tube. Double wall tubing is ideally suited for use in applications that are subject to high levels of vibration and fatigue, such as household and commercial refrigeration compressors.



































































 

Bundyweld Brazed Double Wall Tubing

 


Dimension, mm


Tolerance, mm


Mechanical Properties


OD


WT


OD


WT


Tensile Strength, Mpa


Yield Strength, Mpa


Elongation, % 


3.18


0.50


±0.05


±0.05


290 min


180 min


28 min


3.18


0.70


4.00


0.50


±0.08


±0.08


25 min


4.00


0.70


4.76


0.50


4.76


0.70


6.00


0.65


6.00


0.70


8.00


0.70


 


Surface Treatment


(1) Thickness of surface treatment .


Thickness of inside surface treatment






























 Type CodeThickness of inside surface treatment
 Brazed double wall low carbon steel tubing TDW As is copper-coated for fusion process
  Welded low carbon steel tubing TSW Copper coating not less than 3μm
  Carbon steel tubes for machine structural purposes STKM 11J –
 Copper and copper alloy seamless pipes and tubes  C1201 or C1220 –

 Thickness of outside surface treatment






















































 TypeThickness of outside surface treatment
 Dipped tin-lead alloy coatingElectrolytic zinc coatingOrganic film on electrolytic zinc coating
 Z8Z13Z25Z8-OCZ13-OCZ25-OC
Brazed double wall low carton steel tubingAverage 6μm, minimum 3μmNot less than 8μmNot less than 13μmNot less than 25μmZinc coating not less than 8μmZinc coating not less than 13μmZinc coating not less than 25μm
Organic film average 20μm minimum 10μm
Welded low carbon steel tubing Zinc coating not less than 8μm Zinc coating not less than 13μm Zinc coating not less than 25μm
Organic film average 20μm minimum 10μm
Carbon steel tubes for machine structural purpose  – 
Copper and copper alloy seamless pipes and tubesNo treatment shall be required

(2) Corrosion resistance


 
















































 Type and code of coating Criteria
 Time elapsed till formation of white corrosion product (hr)Time elapsed till form rust (red rust) (hr)
 Electrolytic zinc coatingZ8 72 192
 Z13  72 288
 Z25  72 480
 Dipped tin-lead alloy coatingTIron rust (red rust) shall appear 5 spots or less per 50 cm2 in 24 hours.
Organic film on electrolytic zinc coatingZ8-OC2000
Z13-OC2500
Z25-OC3000

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Picture


 Bundy tube / double wall with zinc coating Bundy steel tube.jpg


Bundy tube / double wall with PVF coating 


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Olive Green Single wall bundy tube 


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Company Information


KGGY bundy tube coils are the copper-brazed, double-walled, steel alloy tubing, used in pre-made lines. It can provide a long-lasting repair or replacement for all vehicles and all types of fluid transfer systems including brake system.


BUNDY SINGLE WALL TUBE.jpg


We are one of the leading Manufacturers, Supplier and Exporters of a wide range of BUNDY TUBE (DOUBLE WALL AND SINGLE WALL )in Shandong, China. We offer Our range includes Seamless Pipes & Tubes / welded pipes & tubes. Corten Steel Pipes & Tubes are where the atmosphere is highly corrosive. We can provide these in customized sized and specification as per requirement of our clients Standard ASTM, ASME & Other equivalent specifications. These Corten Steel pipes & tubes widely used in various application industry such as Sugar Mills, Chemical Plants, Fertilizer Plants, Power Plants and other process oriented plants etc.


 




0.011 s.