Seamless precision steel tubes for high pressure diesel fuel injection

Type: Cold drawn precision seamless carbon steel tube

Standard: DIN2391

Steel grade: ST35, ST45, ST37-4, ST52-4

Delivery condition: +C, +LC, +SR, +A, +N

Application: high pressure fuel injection tubing for diesel engines in automotive industry

Other steel grades and conditions are on request of clients

Dimensional range:

OD: 5mm, 6mm, 8mm, 10mm

WT: Up to 3mm

Tolerance: OD +/-0.05mm, ID +/-0.05mm

Length: Cut-to-length service is available, length 5800mm is suitable for 20 feet container loading.

Any specific size is to be discussed before offer

The tube be 100% eddy current tested

Ultrasonic test is as option

Straightness ≤1mm/1000mm

Roughness: Ra ≤0.6

Delivery condition for availability:

Appearance

• Tubes shall have a smooth internal and external surface consistent with the cold working process. As a result, the arithmetical mean deviation of the profile Ra, will be 6.3 um or less.
• Slight surface imperfections such as scabs or gouges, resulting from the manufacturing process are permitted provided the inner and outer diameters, after dressing, continue to meet the specified requirements, Scabs, laps or laminations are not permitted.

If freedom from imperfections is of particular significance, an appropriate non-destructive test method (such as eddy current or ultrasonic testing) shall be agreed.

• In compliance with commercial practice, the tubes shall be supplied with provisional corrosion protection. If a particular form of corrosion protection, or non whatsoever, is requested, this shall be stated in the order.

Testing

• The tensile test shall be carried out at ambient temperature.
• The flattening test shall be carried out, as specified in DIN EN 10233, on annealed and normalized tubes, the wall thickness of which is less than 15% of the outside diameter.

After testing, the samples shall be inspected for cracks.

• The drift expanding test shall be conducted as described in DIN EN 10234. After testing, the samples shall be inspected for cracks.
• The surface roughness shall be measured axially by using electric stylus instruments as specified in DIN 4768

Tubes shall be delivered with square cut ends. The ends are free of excessive burrs.

The tubes are bundled in the waterproof plastic sheet and packed in the wooden cases

The case is most suitable for hanging by forklift.

EN10204-3.1 MTC shall be issued

EN10204-3.2 MTC is as option