DIN 1629 St37.0/St52.0 Seamless Steel Pipe Cold Drawn/Hot Finished for Structural/Mechanical/Low-Pressure Application

• Customization: Available
• After-sales Service: 24h Onilne Service
• Warranty: 1 Year
• Model NO.: ASTM A179 Gr. B/C, API 5L Gr. B, ASTM A53 Gr. B
• Type: Seamless
• Technique: Hot Rolled
• Material: Carbon Steel
• Surface Treatment: Polished
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Standard Specifications: API 5L A106/A53 A106 A333
• Steel Grades: B, X42, X52, X60, X65, X70, X80 B Gra, Grc Gr3
• Unit Leagth: 4m-12m
• Supplementary Technology: Tensile Test, Flattening Test, Leak Tightness Test
• Range: 1/4"- 24"
• Main Process: Hot-Rolled Seamless
• Wt: 1mm-50mm
• Od: 14mm-1200mm
• Ends: Plain Ends/Bevel Ends
• Package: Packed by Bundles, Plastic Bags, Wooden Cases etc.
• Delivery: 7-35 Days
• Surface: Bared or Painted, Galvanized or with Oiled
• Application 1: Pipeline Transport, Boiler Pipe, Hydraulic/Automob
• Application 2: Oil & Gas Transport, Power Plant, Vessel Pipe
• Application 3: Electronics, Industrial, Food, Boiler, Condenser
• Transport Package: by Bundles, Plastic Bags, Wooden Case, etc.
• Specification: 2.0mm-120mm
• Trademark: EZS
• Origin: China
• HS Code: 73043110
• Production Capacity: 500000/Year

Product Description

Product Description

DIN 1629 St37.0/St52.0 Seamless Steel Pipe Cold Drawn/Hot Finished For Structural/Mechanical/Low-Pressure Application

 

 

DIN 1629 include 3 basic steel grades (ST37, ST44, ST52.), this standard specifies the Seamless Circular Tubes of Non Alloys Steels that are used in construction of chemical plant, pressure vessels, pipe system and general mechanical and engineering purposes. The main steel grades are Din 1629 specification applies to seamless steel tubes and pipes are suitable for gas fusion welding, arc welding, flash butt welding, electric pressure welding and gas pressure welding. Seamless steel pipe, welded steel pipe, Galvanized steel pipe are all available.

The limits of application and other specifications given in this standard shall apply except in cases here other specifications are contained in codes of practice for specific fields of application, e.g. the Technische Regeln fur Dampfkessel (TRD) (Technical rules on steam boilers) or the Technische Regeln fur Druckbehalter (TRB) (Technical rules on pressure vessels), AD-Merkblatter (AD Instruction sheets).

 

1. Introduction

DIN 1629 specifies requirements for seamless circular steel pipes made from non-alloy quality steels (St37.0 & St52.0), widely used in structural and low-pressure applications. These pipes are manufactured through hot-finished or cold-drawn processes, ensuring high dimensional accuracy and mechanical strength.

Key Grades:

• St37.0 (1.0116): Standard carbon steel (Tensile strength: 340-470 MPa)

• St52.0 (1.0831): Higher-strength variant (Tensile strength: 490-630 MPa)

 

2. Key Features

 Material Properties

• Chemical Composition:

  • St37.0: C≤0.17%, Mn≤1.50%, P/S≤0.040%

  • St52.0: C≤0.22%, Mn≤1.60%, P/S≤0.040%

• Surface Finish: Smooth, scale-free (black) or coated (galvanized/PE)

 Manufacturing Standards

• Complies with EN 10255 (general applications) & EN 10216-1 (pressure purposes)

• Seamless construction: No welds, ensuring uniform strength

 Sizes & Tolerances

• Diameter: Ø21.3mm - Ø711mm

• Wall Thickness: 2.0mm - 40mm (Sch 10 - XXS)

• Length: 6m-12m (custom cuts available)

 

3. Advantages

 Superior Strength-to-Weight Ratio

• St52.0 offers 30% higher yield strength than St37.0, ideal for load-bearing structures.

 Corrosion Resistance Options

• Hot-dip galvanized (HDG): Zinc-coated for outdoor use

• 3PE coating: For aggressive environments (e.g., oil/gas pipelines)

 Cost-Effective

• Lower production cost vs. alloy steels, while meeting DIN/EN standards.

 Versatile Fabrication

• Easily welded, bent, or machined for custom applications.

 

4. Typical Applications

• Construction: Scaffolding, bridge components, building frames

• Mechanical Engineering: Hydraulic cylinders, conveyor systems

• Low-Pressure Systems: Water/gas distribution, HVAC

• Transportation: Chassis parts, trailer components

 

5. Compliance & Certification

• Standards: DIN 1629, EN 10255, EN 10216-1

• Certificates: Mill Test Certificates (EN 10204 3.1), PED 2014/68/EU (for pressure use)

• Testing: Hydrostatic, ultrasonic, or eddy current inspection available

 

6. Why Choose DIN 1629 Pipes?

• Reliability: Seamless design eliminates weak points.

• Global Acceptance: Recognized in EU, Middle East, and Asia.

• Customization: Coatings, lengths, and end treatments (beveled/threaded) tailored to projects.

For quotes or technical specs, contact us with your requirements!

 

Note: Add your company's MOQ, packaging options, and lead times for commercialization. Need a version with localized keywords (e.g., GOST equivalents)? Let me know!

 

FAQ


Q:  How many days can you deliver after confirmed the order?
A:  For stock:  within 5-7 days;
      For customized product:  around 30 days;
      For special sizes:  subject to negotiation.

Q: How does your company do quality control?
A: ISO 9001:2015 certified;
     Product certificate as per EN10204 3.1 or 3.2 as per customer's request.
    
  
Q: Can I have a factory-visit?
A:  Surely. All customers are welcome to visit us in China.

Q: Can I have a trial order?
A: Of course, it is an honor for us to have the opportunity to show our quality and service. 
 

Company Profile

	Business Type:	Manufacturer/Factory
	Main Products:	Carbon Steel Pipe , Stainless Steel Pipe , Copper Nickel Tube , Heat Exchanger Tube , Boiler ...
	Registered Capital:	2000000 RMB
	Plant Area:	>2000 square meters
	Management System Certification:	ISO 9001, ISO 14001, OHSAS/ OHSMS 18001, ANSI/ESD
	Average Lead Time:	Peak Season Lead Time: 1-3 months Off Season Lead Time: within 15 workdays

SGS Serial NO. :

QIP-ASI199413Report Verification

EZ STEEL INDUSTRIAL Co., Ltd, together with LONG-RUN METALS Co., Ltd, is the export division and window company of EZ STEEL GROUP, which was founded in 1996 and has been committed to the development and manufacturing of industrial tubes in the past 20 years. It is one of the largest steel tube manufacturing enterprise groups in China. The group possess fixed assets over 200million and more than 800 employees with annual production capacity over 300 thousand tons.

The company has continuously introduced the world advanced manufacturing equipment and now is able to produce welded and seamless steel tube, copper tube and nickle alloy tube. We also have our own coating facilities and workshops for further processing. After years of development, EZ STEEL GROUP and the affiliated enterprises have obtained many kinds of domestic and international certifications including ISO 9001 Quality Management System Certification, ISO14000 Environment Management System Certification, CE, License for Manufacture of Pressure Piping in China, etc. The company has obtained good domestic achievements and is the nominated supplier of CNPC and CNOOC. The product are exported to Southeast Asia, the Middle East and Africa, Europe, Australia, North and Latin Americas via trade companies, and are widely used in pipeline works, foundation works, steel structure works, boiler and condenser fabrication, oil refinery plant, power plant, sugar-making plant, ship-building and offshore construction projects etc.

Holding the concept of First-class Brand, First-class Service, First-class Value, EZ STEEL GROUP is aiming to build up a win-win enterprise platform for both our customers and employees.

CONTACT US
Contact Rosy Xu
EZ STEEL INDUSTRIAL CO., LTD
Add: No.199,  Xiangfu Road, Yuhua Industrial Zone, Changsha City , P.R China 

Pls. do not hesitate to contact me if you have any questions!

You are warm welcomed to visit our factory!!!

Thank you for visiting our products & Looking forward to hearing from you!