Haihao Group Exports Custom Precision Steel Pipes to South Africa
In response to a specialized order from a South African client, Haihao Group has successfully produced and shipped a batch of custom precision carbon steel pipes. The project required exceptional attention to detail, ensuring every pipe fully matched the customer’s engineering drawing and tolerance requirements.
The pipes were manufactured with an outer diameter of 26.5mm and an inner diameter of 21.5mm, maintaining dimensional accuracy within ±0.05mm (OD) and ±0.1mm (ID). Each piece measured 237mm in length, demonstrating Haihao’s strong capability in custom-sized pipe production.

Haihao Group supplies custom precision 20# carbon steel pipes to South Africa
Reliable Quality with 20# Carbon Steel
The pipes were fabricated using premium-grade 20# carbon steel, a material widely recognized for its excellent machinability, moderate strength, and weldability. This choice ensures stable performance under various industrial and mechanical operating conditions.
Haihao’s production process combined cold drawing technology and precision machining to achieve high consistency across all pipe dimensions. Every unit underwent strict dimensional inspection, tolerance verification, and surface quality checks before packaging and shipment.
Commitment to Technical Excellence and International Standards
At Haihao Group, quality assurance is at the core of every manufacturing stage. From raw material testing to final inspection, all procedures strictly adhere to international standards and client specifications.
The engineering team also provides detailed pipe drawings and dimensional reports, ensuring full transparency and product traceability for international customers. This practice reinforces Haihao’s long-standing reputation as a dependable supplier of precision steel components.
Supporting Industrial Projects Worldwide
With more than four decades of experience in steel pipe and fitting manufacturing, Haihao Group continues to supply reliable piping products for projects across South Africa, Europe, the Middle East, and Southeast Asia.
Our commitment to precision, customization, and customer satisfaction drives every project. Whether it’s oil & gas, mechanical engineering, or infrastructure construction, Haihao delivers steel solutions designed for long-term performance.
Project Significance
This shipment to South Africa highlights Haihao’s strength in custom pipe manufacturing, particularly where tight tolerance and precise machining are critical. It also demonstrates our continuous effort to support global customers with high-quality carbon steel pipes and responsive engineering services.