Blog

Moment of inertia and section modulus explained in plain English, with formulas, property charts for square and rectangular tubes, and worked examples.

Can black iron gas pipe be buried underground? Learn why bare steel corrodes in soil and how coatings, joint protection, and code requirements affect selection.

A hollow section is a closed steel profile designed for structural applications. Learn about SHS, RHS and CHS, how hollow sections are manufactured, the main EN, ASTM and GB/T standards, and how they differ from conventional steel pipe.

Compare EN 10210 & EN 10219 standards to determine whether your project requires RHS steel seamless or not. Read our technical guide.

Can you substitute ASTM A500 for ASTM A501? Discover the crucial differences in manufacturing metallurgy, yield strength, AISC wall thickness calculations, and sub-zero fatigue resistance before making procurement decisions.

Choosing the right zinc coating thickness is essential for your structural steel's longevity. This guide explains how to match coating thickness to your project's exposure environment, with a focus on our high-performance 70μm+ heavy-duty galvanizing for aggressive conditions. Contact Yuantai Derun for technical support and product data for your next project.

In an era of increasing trade remedy scrutiny, EPC project success depends on supply chain resilience. As a lead drafter of the GB/T 6728-2025 standard, Yuantai Derun Group provides global infrastructure projects with "Audit-Ready" compliance documentation. We help EPC contractors build transparent evidentiary chains—from raw material traceability to international certification—to mitigate anti-dumping risks. Secure your structural steel sourcing and ensure seamless project delivery today.

The new GB/T 6728-2025 standard is officially active, replacing the 2017 edition. Authored by drafting participant Yuantai Derun, this guide breaks down core revisions: consolidated 6728+6723 frameworks, new laser cutting & mechanical property requirements, and revised Appendix B tolerances & galvanizing re-inspection rules. Get free PDF downloads of the official Chinese, English, and bilingual texts, plus grade mapping to EN 10219 & ASTM A500.

Compare EN 10255, ASTM A53 & BS 1387 steel pipes. Explore critical differences in dimensional tolerances, threading requirements, and multi-standard mill compliance.

Technical insights on manufacturing ultra-large 1550x1550x80mm square steel pipes using JCOE & Round-to-Square processes from Yuantai Derun.

The "Gauge Trap" causes costly steel procurement errors due to standard fragmentation. To ensure integrity, replace vague labels with exact metric values and ASTM standards. Always specify structural grades like ASTM A572 over merchant quality A575, as thickness alone doesn't guarantee strength. Finally, verify quality by measuring away from deformed cut edges with perpendicular calipers and using QR-based digital traceability.

Most wall thickness readings are wrong by up to 0.3mm. It’s rarely a production issue—it’s the 'Burr Trap.' If you measure directly at the cut edge, you're measuring scrap metal, not the pipe. In this technical breakdown, we look at the exact QC protocols used at Yuantai Derun, from the 20mm offset rule to digital MTC verification, to ensure your 11 Gauge specs are 100% accurate.

If you walk onto a job site and ask two plumbers whether you can use galvanized pipe for gas lines, you’ll likely get two different answers. Some will swear it’s a hazard; others will tell you they’ve been doing it for decades.

Building "bigger" with more steel is dead. In 2026, HSS and UHSS are the essential bypass to bloated, high-carbon designs. By leaning out the structural skeleton, these materials reduce environmental impact while significantly lowering foundation and logistics overhead. Efficiency is the new strength.