Haihao Group has successfully completed another custom pipe order for a valued client in South Africa. The project involved the production of precision carbon steel pipes in strict accordance with client drawings and dimensional requirements, showcasing Haihao’s expertise in customized steel pipe manufacturing.

The pipes were manufactured with an outer diameter of 26.5mm and an inner diameter of 21.5mm, maintaining a tolerance of ±0.05mm (OD) and ±0.1mm (ID). Each piece measured 237mm in length, ensuring full compliance with the technical drawing specifications provided by the client.

Haihao Group supplies custom precision 20# carbon steel pipes to South Africa

High Precision Manufacturing with 20# Carbon Steel

Using high-quality 20# carbon steel, Haihao Group applied advanced cold drawing and precision machining processes to achieve excellent dimensional accuracy, surface finish, and mechanical performance. This material provides an ideal balance of strength, ductility, and weldability, making it suitable for pressure-bearing and mechanical applications in industrial environments.

Each pipe underwent rigorous dimensional inspection and surface quality checks before delivery, guaranteeing that all products met both drawing and performance standards.

Commitment to International Quality Standards

Haihao Group adheres to strict internal quality control systems and international standards during every stage of production—from raw material selection to final inspection. Detailed pipe drawings and inspection records accompany each shipment, providing clients with full traceability and confidence in product reliability.

This project once again demonstrates Haihao’s ability to deliver tailor-made piping components that meet the unique technical requirements of global industrial clients.

Supporting Global Industries with Custom Steel Solutions

With over 40 years of experience in the piping industry, Haihao Group has become a trusted supplier of steel pipes, fittings, and flanges for projects across the oil & gas, petrochemical, power generation, and mechanical sectors. Our engineering team specializes in custom pipe fabrication, offering end-to-end solutions from design consultation to on-time delivery.