Pipes, tubes & Hollow bars

Seamless pipes are tubes manufactured through processes such as forming and drawing or rolling, which do not contain a longitudinal welded seam. As a result, they possess a more homogeneous structure, better mechanical parameters, and a lower tendency for defects at connection points. Hollow bars are thicker, precision-engineered tubes with larger internal and external diameters, often used for turning and further machining into finished parts.

Our offer includes pipes and hollow bars made from the following steel groups:

• Stainless steel (austenitic)– the most commonly used grades: 304 (EN 1.4301 / AISI 304) and 316L (EN 1.4404 / AISI 316L). They are characterized by good corrosion resistance and ease of processing.
• Acid-resistant steel– usually grades with increased molybdenum and chromium content (e.g., 316/316L variants or special grades for aggressive environments). Designed for chemical installations and processes involving aggressive agents.
• Heat-resistant steel– grades designed for operation at elevated temperatures, such as the AISI 310/310S-based families. Used in boiler, furnace, and other high-temperature applications.
• Special steels– duplex (e.g., 2205 / EN 1.4462 / UNS S32205) combining higher strength with good corrosion resistance, suitable where greater load-bearing capacity and corrosion resistance are needed.

In the description of each product, we provide the exact grade and designations (EN / AISI / UNS where applicable) to facilitate material selection for a specific application.

Seamless pipes and hollow bars are widely used in many industries, including:

• Power industry– steam installations, boiler systems, heat exchangers.
• Gas and petrochemical industry– high-pressure pipelines, transmission installations, process equipment.
• Chemical and food industry– installations with aggressive media, hygienic process lines (where surface smoothness and cleanliness are vital).
• Construction and HVAC– heating, cooling, and air conditioning systems requiring durable tubular elements.
• Automotive and machinery– structural elements, shafts, bushings for further machining.
• Offshore and shipbuilding– marine installations and structures exposed to seawater corrosion (with appropriately selected steel grade).
• Workshops, repairs, and DIY– precision hollow bars and pipes for repairs, prototypes, and garage structures.

When selecting, it is worth paying attention to several key parameters:

• Material– match the steel grade to the working environment (corrosiveness, temperature, presence of chlorides or acids).
• Working pressure and temperature– the choice of wall thickness and material class depends on these factors.
• Dimensions and tolerances– nominal outer diameter (OD), inner diameter (ID), wall thickness; tolerances affect the possibility of further processing.
• Surface finish– options such as pickled, ground, or polished, depending on hygienic or aesthetic requirements.
• Standards and certificates– check compliance with standards (EN, ASTM, PN) and material documentation (3.1/3.2 certificate, certificate of conformity), if required.
• Machinability– some grades are better suited for bending, welding, or turning; for complex operations, consult the selection with the supplier.

Seamless pipes offer several significant advantages compared to welded pipes:

• Better material homogeneity and higher mechanical strength.
• Lower susceptibility to local defects and corrosion along joints.
• Greater reliability in high-pressure and high-temperature applications.
• Simplified final processing (turning, milling) in the case of precision hollow bars.

A disadvantage may be the higher price compared to welded pipes; however, for many applications, the longer service life and operational safety compensate for the higher initial cost.

Our pipes and hollow bars are intended for:

• designers and engineers of industrial installations,
• power and petrochemical plants,
• contracting companies in the HVAC, construction, and shipbuilding industries,
• mechanical workshops and machinery manufacturers,
• wholesalers and individual customers looking for durable solutions.

Seamless pipes and hollow bars made of stainless, acid-resistant, and heat-resistant steel are the solution for demanding applications – from industrial and power installations, through chemical and food processes, to offshore structures and machine parts. When choosing, consider the material, working conditions (temperature, pressure, environment), and standards. In case of doubt, our specialists will help you select the appropriate grade and dimensions for your specific application.