What is Drawn Tube ?
An extruded tube brought to final dimension by cold drawing through a die and over a mandrel. This process reduces the cross sectional area of the tube, increases strength and refines the tube surface.
Tube Drawing Diagram
Drawn Tube Products
Bow Rails
Swaged Tube
Expanded Tube
Flared Tube
Ping Golf
Swimming PoolBlue
Gold
Black
Drawn Tube Shapes
Upon special inquiry, we offer drawn shapes including squares,triangles, and flutes. Square and triangular shapes are not supported by the tube straightening process, therefore straightness is not guaranteed.
TriFlat
Square
Fluted Tube
Drawn Tube Advantages Vs Extruded Tube
- 1. Dimensional Tolerances-Because the tube is drawn over a mandrel and through a die, consistent dimensions can be achieved.
- 2. Superior Strength-Coldwork increases tube strength and is stronger that an equivalent extruded tube.
- 3. Attractive Appearance-The drawing process enhances tube cosmetics by producing a bright finish with no weld lines.
- 4. Machining-The drawn tube's superior strength and hardness characteristicsenhance tube machinability. This assures a better machined surface with less gumming.
- 5. Bending-Better dimensional and temper characteristics greatly enhance tube bending operations. Consistent dimensions and temper reduce bender setuptime and require less machine adjustments. Tube spring back is enhanced. Precise bendscan be obtained.
- 6. Anodizing-The draw process refines the surface of the tube eliminating extrusion die lines and other surface irregularities. This provides a superior finish for bright dip and etch and clear anodizing.
Porthole VS Seamless -Market Look
- 1. Porthole drawn tube is suitable for many tube applications -flagpoles, antennas, conveyor rolls, textile spools, orthopedic applications, recreational, marine applications.
- 2. Seamless tube is better suited for high stress applications such as hydraulic cylinder tube used in trench shoring devices, photocopiers, bicycle, kicking scooters, etc.
Tube Fabrication
A broad range of value added services are available.
- Hydraulic End Forming
- Cut To Length
- Deburring
- Flaring
- Punching
- Chamfering
- Threading
- Bending
Finishing
A broad range of finishes are available.
- Bright Dip Clear
- Bright Dip Gold
- Black Dip Black
- Etch & Clear
- Etch & Gold
- Etch & Black
- Swimming Pool Blue
- 2 Step Organic Black
Certifications
Drawn Tube is certifiable to the following specifications:
ASTM-B483 -Porthole General Purpose Drawn Tube
ASTM -B210 -Seamless Drawn Tube