These tubes are manufactured according to DIN 73000. All aspects such as mechanical properties and dimension tolerances highly conform to the requirements of diesel engine tube.

In view of oil tube' s special quality requirements, we use high quality tube blank ST30Al, ST35, ST37, ST45, ST55 from Xingcheng steel or Bao steel which is better in mechanical properties regarding elongation rate, tensile strength, especially high pressure resistance.

High pressure fuel tube
Standard: DIN 2391
Specification: 6* 1.2 6* 1.5 6* 1.8 6* 2 etc.
Surface: Bright and smooth
Automobile air-condition tube
Process: Heat treatment
Surface: Bright and smooth
Mechanical properties: Flattened completely, bend at any angle without crack and break
Substitute for copper or aluminum pipe

Coating
1. Olive green coated seamless steel pipe
Coat thickness: 8-25um
Length of pipe coated: & le; 3.5M
Free of Cr6

Production Description:
1) Heat Treatment: Annealing, Bright Annealing;
2) Continuous Stenciling If You Require;
3) Antirust, Lubricating Treatment;
4) Adding Plastics in both sides;
5) Bale Into Hexagon, Max 2000 Kg/ Bundle, Strengthening With Reinforcing Rod;
6) Smooth Surface, Mechanical Properties equilibrium, Tightness Tolerance

Chris.hwsteel (at)gmail(dot)com