High pressure chrome free (CR6-free) Seamless Steel Hydraulic oil Tubing din2391 en10305-4
Torich is a manufacturer of precision metal tubing for over 20 years.High precision seamless steel tube
is our hot products,mainly exported to EU,USA Asia etc.
Standard of Seamless Steel Hydraulic oil Tubing :DIN 2391 EN 10304-1/EN10305-4 DIN1629 DIN 1630
Material: ST52 ST37 ST 44 ST 52 ST 37.4ST 44.4 ST52.4 ST 35 ST45 ST52 E235 E355 etc.
Main feature of Seamless Steel Hydraulic oil Tubing:
High precision
Excellent brightness
No oxidization on outer and inner walls after heat treatment
High cleanness of inside wall
High pressure
No deformation after clod bending
No crack after flaring and flattening
Delivery condition of Seamless Steel Hydraulic oil Tubing:
BK ,BKW,BKS,NBK etc.
Size:OD:1.5-60mm(0.1inch-2inch)
Wall thickness:0.3-10mm(0.012-0.35 inch)
Main size list:
| Outside Diameter | Wall Thickness Imperial | Wall Thickness Metric |
| 6.35mm / 0.250″ | 20swg | 0.90mm |
| 6.35mm / 0.250″ | 18swg | 1.20mm |
| 6.35mm / 0.250″ | 16swg | 1.60mm |
| 6.35mm / 0.250″ | 14swg | 2.03mm |
| 7.94mm / 0.313″ | 20swg | 0.90mm |
| 7.94mm / 0.313″ | 18swg | 1.20mm |
| 7.94mm / 0.313″ | 16swg | 1.60mm |
| 7.94mm / 0.313″ | 14swg | 2.03mm |
| 9.53mm / 0.375″ | 20swg | 0.90mm |
| 9.53mm / 0.375″ | 18swg | 1.20mm |
| 9.53mm / 0.375″ | 16swg | 1.60mm |
| 9.53mm / 0.375″ | 14swg | 2.03mm |
| 9.53mm / 0.375″ | 12swg | 2.64mm |
| 9.53mm / 0.375″ | 11swg | 2.95mm |
| 9.53mm / 0.375″ | 10swg | 3.20mm |
| 11.11mm / 0.437″ | 20swg | 0.90mm |
| 11.11mm / 0.437″ | 18swg | 1.20mm |
| 11.11mm / 0.437″ | 16swg | 1.60mm |
| 11.11mm / 0.437″ | 14swg | 2.03mm |
| 11.11mm / 0.437″ | 12swg | 2.64mm |
| 11.11mm / 0.437″ | 11swg | 2.95mm |
| 11.11mm / 0.437″ | 10swg | 3.20mm |
| 12.70mm / 0.500″ | 20swg | 0.90mm |
| 12.70mm / 0.500″ | 18swg | 1.20mm |
| 12.70mm / 0.500″ | 16swg | 1.60mm |
Application of precision steel pipes:
Main uses: Hydraulic Oil Seamless Steel Tubing for hydraulic systems, steel pipes for automobiles, and other customers who have ,
high requirements for steel pipe accuracy, smoothness, cleanliness, and mechanical properties.
Hydraulic system
Automobile
Certificates: EN 10204.3.1
Inspection Items:
Chemical analysis
Eddy Current Test 100% Size and surface shecking 100%
Inspection and test list for the DIN 2391 Standard Hydraulic Oil Seamless Steel Tubing
| Inspection or test types of Seamless Precision Steel Tubes | Test frequency |
| Internal test | Acceptance test |
| Chemical analysis | M | M |
| Tensile testing | M | One per tested batch |
| Flattening test or extension test | M | Two per tested batch |
| Dimension verification | M | M |
| Visual inspection | M | M |
| NDT in order to identify leaks | Individual | Individual |
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