Hydraulic Tubes, Honed Tubes & Chrome Rods | Pannani Tubes

Hydraulic Tubes & Rods

Precision Cold-Drawn Tubes, Honed Cylinders, and Hard Chrome Piston Rods.

Hydraulic Fluid Lines & Cylinders

Phosphated Hydraulic Tube
Black Phosphated

Phosphated Tubes

DIN 2391 / EN 10305-4. Grades ST37.4 (E235+N) & ST52.4 (E355+N). High-pressure fluid lines with excellent bending capabilities.

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Zinc Plated Tubes
Cr6-Free

Zinc Plated Tubes

Precision seamless tubes with external Zinc/Yellow Chromate plating (Cr6-free). High corrosion resistance for exposed hydraulic lines.

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SS Hydraulic Tube
Offshore / Marine

SS Hydraulic Tubes

ASTM A269 / A213. Grades 304L, 316L, 316Ti. Bright Annealed (BA) finish for instrumentation and harsh marine environments.

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Honed Tube
Tolerance H8/H9

Honed Tubes (Cylinders)

Cold drawn & Skived/Roller Burnished. ST52 / E355+SR. Exceptional inner surface finish (Ra < 0.4µm) for hydraulic cylinders.

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Hard Chrome Rod
Piston Rods

Hard Chrome Plated Rods

Grades CK45, C45E, 20MnV6. High wear and corrosion resistance. Standard and Induction Hardened (IH) options available.

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Hydraulic Fittings
Accessories

Hydraulic Fittings

DIN 2353 Bite-type and Ferrule fittings. Connectors, elbows, and tees designed perfectly for our precision fluid line tubes.

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Grades & Delivery Conditions

Understanding EN 10305 & DIN 2391 symbols for proper bending and pressure ratings.

Standard / Grade Tensile Strength (Min) Delivery Condition Characteristics & Use
ST37.4 / E235 340 MPa +N (Normalized) High ductility. Excellent for cold bending and flaring in fluid circuits.
ST52.4 / E355 490 MPa +N (Normalized) Higher strength fluid lines handling extremely high operating pressures.
ST52 / E355 (Honed) 580 MPa +SR (Stress Relieved) Cylinder barrels. Retains high yield strength while allowing slight machining.
CK45 / C45E (Rod) 600 MPa +C (Cold Drawn) / Plated Piston rods. Hard chrome layer provides wear & corrosion resistance.

Dimensions & Tolerances

Fluid Line Tubes (OD)

4.0 mm to 60.0 mm

High precision OD/WT ratios ensuring zero leakage with bite fittings.

Honed Tubes (ID)

40.0 mm to 250.0 mm

Strict H8 / H9 Inner Diameter tolerances for precise piston sealing.

Testing & Quality

100% Eddy Current

Free from scale, internal cleanliness per ISO 4406 standards.

Need a Complete Cylinder Kit?

We can supply matching Honed Tubes and Chrome Plated Rods cut to your specific lengths.

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