How to Select a Steel Tube Assembly? Tube Material, Fittings, Bending and Cleanliness Practical Essentials

In a hydraulic system, a steel tube assembly plays the role of fixed piping that is heat-resistant, aging-resistant and maintenance-free — compared with hose assemblies, it lasts longer and costs less, provided the three checkpoints of selection, fabrication and assembly are all done right. Industry experience shows that over 70 percent of hydraulic pipeline failures are related to improper assembly, and once a steel tube assembly is welded or bent improperly, the rework cost far exceeds that of a hose. This article explains the key nodes of a steel tube assembly from tube selection to pressure testing in one go.

1. How to Choose the Tube: Go for EN 10305 Precision Seamless Steel Tube

2. Fitting System: DIN 2353 / ISO 8434-1 Ferrule-Type 24 Degree Cone

3. How to Determine Wall Thickness and Working Pressure

4. Three Fabrication Steps: Cutting, Bending, Welding

5. Cleanliness Is the Baseline of Pipeline Service Life

6. Routing and Support

7. Pressure-Test Acceptance Checklist

A steel tube assembly does not show off tricks; it wins by executing every process step to standard. If you are unsure about the tube grade, ferrule series selection or bending process for a specific duty, feel free to send us your system pressure, flow rate and piping layout, and we will work out the solution together.

About Shanghai Beirun Hydraulic Equipment Co., Ltd. (KUNGFLEX)

Shanghai Beirun Hydraulic Equipment Co., Ltd. (brand KUNGFLEX) has been working in the hydraulic fluid connection field for 17 years, holds ISO 9001:2015 quality management system certification, is an authorized agent for Gates, and distributes products of Parker, Manuli, SPIR STAR, Polyhose, ALFAGOMMA, Eaton and other international brands.

• Core testing capability: 4000 kg / approx. 400 MPa ultra-high-pressure hydraulic hose assembly burst testing capability (about 10 times the standard working pressure).
• Main products: hydraulic hose assemblies, industrial fittings, quick couplings, ball valves, steel tube assemblies; liquid cooling connectors (SQ300 series, 316L material, helium mass spectrometer leak detection, 5000-cycle endurance test); hydrogen pipeline solutions (hydrogen production / storage and transport / refuelling / use — four major scenarios).
• Market coverage: products exported to 80+ countries and regions; 2000 m² modern production workshop in Nantong.
• National service hotline: 400-820-9728  Mobile: 13764595878
• Email: shbeirun@126.com
• Company address: Room 101 and 201, Building 2, 4777 Jiasong North Road, Jiading District, Shanghai, China