Hydraulic tubes - steel, stainless

A hydraulic tube is an element of a hydraulic system used to transmit working fluid under high pressure. It is  a component of hydraulic systems because it enables the safe and efficient transfer of the working medium between individual system elements, such as pumps, valves, actuators, or distributors. Hydraulic tubes are designed with high-pressure resistance, corrosion resistance, and manufacturing precision in mind, which is crucial for the proper operation of power hydraulic systems. 

Tubes for power hydraulics

On the page below  you will find seamless precision tubes that are perfect as hydraulic tubes. They are made of high-quality steel, which guarantees their strength and resistance to intensive use. The lack of seams significantly increases their durability and eliminates the risk of leaks that could occur at the joint of welded tubes. Seamless precision tubes offered by Hydron meet strict quality standards and are available in various diameters and wall thicknesses, allowing them to be matched to the specific requirements of a given hydraulic system.

High-pressure tubes 

Seamless precision tubes are an element of hydraulic installations, used wherever reliable transmission of medium under very high pressure is required. Their exceptional strength results from the production technology – these are seamless tubes, which means no welds weakening the structure and greater resistance to extreme operating conditions. Thanks to high-quality steel and a precise machining process, these tubes are adapted to operate even at pressures reaching several hundred bars. This makes them applicable in the most demanding power hydraulic systems, industrial pressure systems, and in applications requiring maximum tightness and durability.

Advantage of tubes over hoses in power hydraulics

Why are hydraulic tubes and piping sometimes used instead of hydraulic hoses ? The choice between hydraulic tubes and hydraulic hoses depends on the specific application, operating conditions, and strength requirements of a given hydraulic system. Although hydraulic hoses are widely used due to their flexibility, in many cases piping and hydraulic tubes prove to be a better solution. When is it worth using hydraulic tubes instead of hoses ? Hydraulic tubes are often chosen in systems where the following are key: ✔ Dimensional stability – Tubes do not undergo expansion under pressure, which ensures precise and constant flow characteristics over a long period of use. ✔ Higher pressure resistance – Thanks to their design, seamless precision tubes can withstand significantly higher working pressures than flexible hydraulic hoses. ✔ Better resistance to high temperature – Steel hydraulic tubes are less susceptible to degradation at extreme temperatures, where rubber materials can age and lose their properties. ✔ Resistance to abrasion and mechanical damage – Compared to hoses, piping is more resistant to abrasion, bending, or accidental mechanical damage, e.g., as a result of contact with sharp edges. ✔ Lower susceptibility to oscillations and vibrations – Tubes provide stiffer and more stable connections, which is important for systems that work in conditions of continuous vibration and dynamic loads. ✔ Longer service life – Due to the lack of degradation related to flexibility, piping has a significantly longer service life compared to hydraulic hoses.

Precision tubes by the meter 

The offer includes seamless precision tubes designed for power hydraulics black according to DIN 2391-2/C, in grades St 37.4, St 44.4, and St 52.4, as well as galvanized. Standardly available in outer diameters from 6 mm to 42 mm with various wall thicknesses in 3 or 6-meter sections. We have both galvanized and blackened tubes designed for high-pressure hydraulic installations. Material the tubes are made of: Precision seamless: E235+N, E355+N according to EN 10305-4; St 37.4, St 52.4 according to DIN 1630 (TDP-DIN 2391). Our offer also includes machines for processing precision tubes ( power hydraulic tubes ) In power hydraulics, precision and reliability are of key importance. In our offer, you will find seamless precision tubes made of the highest quality materials that meet strict standards and technical requirements.

Types of precision tubes in our offer :

• black steel tubes ( made of carbon steel )
• galvanized steel tubes ( made of carbon steel )
• stainless steel tubes

Standard dimensions of seamless tubes

In our offer, you will find both thick-walled and thin-walled tubes ( with a thin wall ). Each tube has its wall thickness specified next to its outer dimension : example 10x2 = tube with an outer diameter of 10mm with a wall thickness of 2mm.  In our offer, you will find hydraulic tubes with outer dimensions : 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 15 mm, 16 mm, 18 mm, 20 mm, 22 mm, 25 mm, 28 mm, 30 mm, 32 mm, 35 mm, 38 mm, 40 mm, 42 mm, 45 mm, 50 mm, 60.3 mm, 63.5 mm, 70 mm, 75 mm, 88.9 mm, 90 mm, 108 mm, 114.30 mm.

Technical specification of tubes:

• Material: E235+N steel according to the EN 10305-4 standard or St. 37.4 NBK according to DIN 1630, providing exceptional strength.
• Coating: Galvanized tubes with a Cr VI-free coating, which guarantees durability and protection against corrosion.
• Standard length: 6 m, with the option of cutting into sections of 3m, 2m, or 1m to suit individual needs. 
• Diameter range: Available tubes in various dimensions – from thin-walled to thick-walled, meeting requirements for different pressure applications.

Why is it worth choosing our products ?

In our offer, you will find not only a wide selection of seamless precision tubes, but also comprehensive support in the field of their processing and installation. We offer products of the highest quality, modern machines, and professional technical advice. We invite you to familiarize yourself with our full offer and choose solutions tailored to your needs!  Hydron – your partner in power hydraulics. By choosing steel tubes and equipment for their processing in the Hydron store, you gain a guarantee of quality, durability, and reliability. Our products meet all standards and regulations, and our specialists are here to help in selecting the appropriate solutions.

Application of seamless hydraulic tubes :

Where are hydraulic tubes used ? Seamless precision tubes are used in many industries, such as: Power hydraulics: Precision tubes are a basic element of hydraulic installations, used for transporting the medium under high pressure. Automotive industry: Used in fuel and brake systems thanks to their durability and corrosion resistance. Machine industry: Used for the construction of frames, guides, and other elements requiring high precision. Construction: They are used in steel structures and transmission installations.

Galvanized tube prices - price list for hydraulic tubes 

How much does a meter of tube cost ? The price of precision tubes depends on several factors such as diameter, wall thickness, and the material from which it is made. 

Tube fittings and other accessories 

For all offered tubes, we also have the appropriate tube fittings such as cutting rings, union nuts, straight fittings, elbow fittings, etc. Tube fittings enable the connection of piping without the need for welding; the connection obtained by tightening the ring on the hydraulic tube and tightening it with a nut gives us the certainty that this type of obtained connection will be leak-tight up to several hundred bars.  The offer also includes polypropylene clamps for fixing tubes and hoses. Compatible tube accessories: In our offer, you will also find: DIN 2353 tube fittings, DIN 3015 mounting clamps, Sealing components.

Machines and equipment for tube processing

We offer not only high-quality precision tubes, but also modern machines and equipment that enable their professional processing, including: Hydraulic tube benders: Precise bending of tubes according to technical requirements. Tube flaring devices: Enable the preparation of tubes for connection in hydraulic systems. Tube deburring devices: Remove sharp edges after cutting, increasing safety and work precision. Ring assembly devices: Facilitate the installation of rings on tubes, ensuring the tightness of connections. Tube cleaning systems: Remove internal impurities, ensuring high quality of the medium flow. 

Hydraulic tube 316L

The 316L tube is a tube made of AISI 316L austenitic stainless steel, which is characterized by very high corrosion resistance, including to moisture, chemicals, and aggressive environments. The "L" (low carbon) designation informs about the reduced carbon content, which significantly improves the material's resistance to intergranular corrosion, especially after welding processes. 316L steel contains an addition of molybdenum, which increases resistance to pitting and crevice corrosion, especially in environments containing chlorides. Thanks to this, 316L tubes are much more durable than popular 304 stainless steel tubes in demanding working conditions.

Properties of 316L steel tubes

316L tubes are characterized by very good chemical resistance and high mechanical durability. This material retains its properties at both low and elevated temperatures, while remaining easy to process and weld. The smooth internal surface of the tubes promotes the maintenance of medium cleanliness and limits the deposition of contaminants. Thanks to the low carbon level, 316L tubes can be used in welded installations without the risk of losing corrosion resistance in the weld zone, which is of great importance in pressure and process installations.

Application of 316L tubes

316L tubes find wide application in installations where high reliability and resistance to aggressive media are required. They are used, among others, in:

• power hydraulics and high-pressure installations

• chemical and petrochemical industry

• food and pharmaceutical industry

• technical and process water installations

• fuel and oil systems

• marine and offshore industry

316L stainless steel tubes are especially recommended where standard carbon or stainless steels do not provide sufficient durability.

316L tube vs other stainless steels

Compared to 304 steel, 316L steel offers significantly better corrosion resistance in moist and chemical environments. The 316L version is also a better choice for welded installations than 316 steel because it limits the risk of material degradation at connection points. The 316L tube is a high-quality stainless steel tube designed for operation in difficult operating conditions. It combines very good corrosion resistance, mechanical durability, and the possibility of safe welding, which makes it widely used in modern industrial, hydraulic, and technological installations. Thanks to its properties, 316L tubes are a proven and long-term solution wherever reliability and installation safety count.

Seamless tube – what it is and where it is used

A seamless tube is a precision tubular element made without a longitudinal weld, most often by cold rolling or drawing. The lack of a seam means a uniform material structure around the entire circumference of the tube, which directly translates into higher strength, tightness, and pressure resistance compared to welded tubes. For this reason, seamless tubes are commonly used in power hydraulics, pneumatics, and the machine industry.

What distinguishes a seamless tube

The most important feature of a seamless tube is the homogeneous material structure, which eliminates the risk of weakening at the weld site. Thanks to this, tubes of this type tolerate dynamic loads, pressure changes, and intensive exploitation very well. Precise execution ensures a constant internal and external diameter, which is of great importance when mounting hydraulic fittings and sealing elements. Seamless tubes are also characterized by good resistance to deformation and the possibility of bending and mechanical processing without the risk of cracks. This makes them eagerly chosen for installations requiring accuracy and reliability.

Application of seamless tubes in hydraulics and industry

Seamless tubes are the standard in power hydraulic systems, where they work under high hydraulic oil pressure. They are used, among others, for the construction of rigid lines, systems supplying hydraulic cylinders, distributors, and other elements of the system. Their properties make them a safe solution in construction, agricultural, and industrial machinery, and in specialized devices. Outside of hydraulics, seamless tubes are used in pneumatics, the machine industry, power engineering, as well as in lubrication systems and technological installations. Where tightness, durability, and pressure resistance are important, the seamless tube is the preferred solution.

Seamless tube vs welded tube

Compared to welded tubes, a seamless tube offers a higher level of occupational safety. The absence of a weld eliminates a potential point of failure, which is especially important in high-pressure installations. Welded tubes are often used in less demanding applications, while in power hydraulics and precision industrial systems, seamless solutions dominate. Seamless tubes are also easier to seal using cutting rings, hydraulic fittings, and cone connections, which additionally increases their reliability.

Seamless tubes in the Hydron offer

Hydron's offer includes seamless tubes intended for hydraulic and industrial applications, meeting the requirements of installations working under pressure. The offered tubes are characterized by high quality of workmanship, repeatable dimensions, and stable technical parameters, which facilitates assembly and exploitation. Thanks to the high availability of diameters and material variants, it is possible to adapt a seamless tube to a specific application. The experience of the Hydron team also allows us to provide professional technical support in selecting the appropriate tubes and compatible fittings, so that the entire installation is durable and safe to use.

Also check: 

• advantages of seamless precision tubes and their application.
• working pressure of galvanized seamless tubes and working pressure of stainless tubes
• working pressure of steel and stainless tubes

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