Haihao Group has successfully completed another shipment of GOST 8734-75 seamless cold drawn steel pipes for a long-term customer in Latvia. The order includes precision cold drawn seamless pipes manufactured from ST20 (20#) carbon steel material with fixed lengths of 11.2 meters.
With strict control over dimensional accuracy, mechanical performance, and non-destructive testing procedures, Haihao Group continues to provide reliable steel pipe solutions for European industrial projects.
Shipment Overview
| Product | Size | Material | Standard |
| Seamless Cold Drawn Steel Pipe | 42 × 4 mm | ST20 / 20# | GOST 8734-75 |
| Pipe Length | 11.2 Meters Fixed Length | Carbon Steel | Cold Drawn Seamless |
GOST 8734-75 ST20 seamless cold drawn steel pipes manufactured by Haihao Group
High-Quality GOST 8734-75 Seamless Cold Drawn Steel Pipes
The supplied products are manufactured according to the Russian standard GOST 8734-75, which is widely used for precision seamless steel tubes in industrial and mechanical applications.
This batch of GOST 8734-75 seamless cold drawn steel pipes features:
- Accurate outer diameter and wall thickness
- Smooth internal and external surfaces
- Excellent mechanical strength
- Stable dimensional tolerance
- Reliable welding and processing performance
The ST20 material offers good toughness and machinability, making it suitable for structural engineering, machinery manufacturing, pipeline systems, and industrial equipment production.
ST20 Carbon Steel Chemical Composition
Haihao Group strictly controls the chemical composition of the ST20 material to ensure product consistency and compliance with customer requirements.
Chemical Composition of ST20 (20#)
| Element | Requirement |
| Carbon (C) | 0.17–0.24% |
| Manganese (Mn) | 0.35–0.65% |
| Silicon (Si) | 0.17–0.37% |
| Phosphorus (P) | ≤0.03% |
| Sulfur (S) | ≤0.035% |
| Chromium (Cr) | ≤0.25% |
| Copper (Cu) | ≤0.30% |
| Nickel (Ni) | ≤0.30% |
These controlled chemical values help guarantee the stable performance of the ST20 seamless cold drawn steel pipe during fabrication and field application.
Mechanical Properties at Room Temperature
The delivered pipes also meet the required mechanical performance standards:
| Property | Value |
| Tensile Strength | ≥412 N/mm² |
| Yield Strength | ≥245 N/mm² |
| Elongation | ≥21% |
| Hardness | ≤156 HB |
These mechanical properties ensure reliable strength and durability for demanding industrial environments.
Hydrostatic Testing and Non-Destructive Examination
To guarantee product safety and quality, all pipes underwent:
- Hydrostatic pressure testing
- Non-destructive testing (NDT)
- Dimensional inspection
- Surface quality inspection
- Material verification
Haihao Group places great emphasis on quality control throughout the entire production and export process.
Reliable Steel Pipe Supplier for International Projects
Haihao Group has rich experience supplying seamless steel pipes and industrial piping materials to customers in Europe, the Middle East, Southeast Asia, and South America.
We can provide:
- Seamless steel pipes
- Cold drawn precision tubes
- Pipe fittings
- Flanges
- Forged fittings
- Customized steel products
Our products comply with international standards including:
- GOST
- ASTM
- EN
- DIN
- ASME
Why Customers Choose Haihao Group
Stable Manufacturing Quality
Strict inspection procedures ensure consistent product performance.
Export Experience
Professional packaging and logistics support for international delivery.
Technical Support
Fast communication and customized production solutions.
Flexible Production Capacity
Support for customized dimensions, standards, and testing requirements.
This successful shipment of GOST 8734-75 seamless cold drawn steel pipes to Latvia further demonstrates Haihao Group’s capability in supplying high-quality carbon steel pipe products for global industrial projects.
If you are looking for a reliable supplier of:
- ST20 seamless steel pipes
- GOST standard steel tubes
- Cold drawn seamless pipes
- Precision carbon steel tubing
Haihao Group is ready to support your next project with professional service and competitive solutions.
