Core Advantage: German Industrial Standard Certified, Full Coverage from 1/2 Inch to 1300mm

DIN 1629 is the German industrial standard specification for seamless circular tubes of non-alloy steels, suitable for chemical plant construction, pressure vessels, piping systems, and general mechanical and engineering purposes. Its main steel grades, St37 and St52, represent typical applications of general-purpose carbon steel and high-strength carbon steel respectively. Our product series achieves full coverage from 1/2 inch (21.3mm) small diameter to 1300mm super large diameter, utilizing various processes including hot rolling, cold drawing, and hot expansion to meet pipeline requirements under different conditions.

We provide more than just steel pipes; we offer universal solutions for your chemical and mechanical engineering projects.

Why Choose DIN 1629 St37/St52 Carbon Steel Seamless Pipe?

1、Two Steel Grades, Choose as Needed

St37: Low strength general grade, carbon content ≤0.17%, good weldability and formability, suitable for low-pressure fluid transmission and general structural components.

St52: Medium-high strength grade, carbon content ≤0.22%, yield strength ≥355MPa, tensile strength 500-650MPa, suitable for medium-pressure pipelines and mechanical parts.

2、Full Size Coverage

From 1/2 inch (21.3mm) to 36 inch (914mm) seamless pipes, and up to 1300mm super large diameter pipes produced through hot expansion process. Wall thickness range from SCH10 to XXS, meeting different pressure ratings.

3、Operating Temperature ≤300℃

DIN 1629 standard pipes are limited to service temperatures below 300℃, maintaining stable mechanical properties within this range. High-temperature yield strength data is available per standard tables.

4、Excellent Weldability

Non-alloy steel composition makes it suitable for various welding processes including gas fusion welding, arc welding, and flash butt welding, facilitating on-site construction and pipe connections.

5、Multiple Delivery Conditions Available

Available in hot rolled (HR), cold worked (CW), stress relieved (SR), normalized (N), and other conditions to meet different processing requirements.

Key Application Areas

Chemical Plant Construction: Process piping, material transmission lines.

Pressure Vessels: Low-pressure vessel shells, tank nozzles.

Piping Systems: Water, oil, gas fluid transmission lines.

General Mechanical Engineering: Hydraulic cylinders, drive shafts, rollers, structural supports.

Construction: Steel structures, scaffolding, piling pipes.

Technical Specifications

Why Choose Us?

Full Size Coverage: From standard small diameter to 1300mm super large diameter hot-expanded pipes, everything available.

Both Grades in Stock: Regular inventory of St37 and St52 pipes in various wall thicknesses, meeting urgent project requirements.

Custom Processing Services: Support for cut-to-length, beveling, surface finishing, and various machining services.

Quality Assurance: Material test reports and third-party inspection available; products comply with DIN standard requirements.

Conclusion: From standard pipelines to super large diameter projects, from general-purpose St37 to high-strength St52, DIN 1629 seamless carbon steel pipes serve every link of chemical, mechanical, and pipeline engineering with German industrial standard reliable quality. Contact us today for your tailored seamless pipe solution!

Note: When selecting DIN 1629 steel pipes, please confirm the following elements: Material (St37 or St52), OD × WT (e.g., 273×12.7mm), Standard DIN 1629, Length Requirements, and End Type. For operating temperatures exceeding 300℃, please consider other high-temperature materials.