Precision tubing (cold processing)

Seamless tubing

 

Element pipe production process (hot extrusion from round bar)

Cold finish process

The same cold processing is used for both welded drawn tubing and precision rolled tubing.

 

Dimensional accuracy of cold rolled tubing

（mm）
Item	Dimensional range	Dimensional accuracy
Outer diameter accuracy	3.0 〜 20.0	±0.02
	21.0 〜 30.0	±0.03
	31.0 〜 60.0	±0.05
Inner diameter accuracy	1.4 〜 59.0	±0.02
Thickness accuracy	Thickness 0.05 〜 5.0	±0.03
Surface roughness	Outer diameter 3.0 〜 30.0	Outer surface:　2S 〜 3S
		Inner surface:　2S 〜 3S
	Outer diameter 31.0 up	Outer surface:　2S 〜 3S
		Inner surface:　3S 〜 5S

 

Application

• Cylinder tube for various pneumatic devices
• Automobile parts (electromagnetic valve for ABS, brake sleeve, etc.)
• Various parts of OA equipment
• Other applications that require excellent smoothness of internal surface, such as high pressure piping