Steel Knowledge

LSAW vs SSAW vs Seamless Steel Pipe: How to Choose the Right Steel Pipe

Key Takeaways for Buyers and Engineers Choosing the right steel pipe manufacturing process is essential for offshore structures, piling projects, marine construction, and other heavy engineering applications. LSAW steel pipes, SSAW steel pipes, and seamless steel pipes are all widely used in indu... Read More

Hot Rolled vs Cold Rolled Steel Tubes: Differences, Applications & Buying Guide

Introduction When sourcing structural steel tubes for construction, solar projects, or industrial fabrication, buyers often face a common question: should they choose hot rolled or cold formed steel tubes? Hot rolled and cold rolled steel tubes may look similar, but their manufacturing processes ... Read More

Hot-Dip Galvanized Steel Pipe: From Standard Zinc Layers to 70μm Heavy-Duty Protection

  When you’re dealing with major infrastructure or industrial builds, steel is pretty much the foundation of everything. But the real test isn’t just how much weight the steel can hold—it’s how it handles getting beat up by the elements year after year. Standard galvanizin... Read More

EN 10219 vs GB/T 6728: 5 Differences for Structural Hollow Section Procurement

Executive Summary For international EPC projects, EN 10219 (European Standard) and SAC GB/T 6728 (Chinese Standard) define technically comparable cold-formed welded structural hollow sections (RHS, SHS, CHS). While S355JR serves as the primary equivalent Chinese grade to Q355B due to their mat... Read More

Solar Procurement Risks Under GB/T 6728-2025

  If you are a solar EPC contractor or procurement manager buying structural steel hollow sections from China, you need to update your specification sheets right now. As of March 1, 2026, China’s cold-formed steel industry officially rolled out the new GB/T 6728-2025 standard, completely re... Read More

GB/T 6728-2025 PDF Download & Comparison Guide

Table of Contents · Engineering Reference Documents · Standard Overview · Key Technical Updates · Grade Equivalence Table · Technical Comparison (2017 vs. 2025) · Applications · Procurement Checklist · Frequently Asked Questions · Supplier Capability · Technical Support   GB/T 6728-2025 r... Read More

Sourcing EN 10255 Steel Pipes: Technical Factors Beyond Price

When evaluating steel pipes for low-pressure gas, water supply, or fire sprinkler networks, the EN 10255 standard is a universal reference on almost every technical inquiry. For procurement professionals, it is common practice to compare quotations based primarily on the per-ton price. However, i... Read More

1550mm Large SHS/RHS Procurement| Yuantai

Heavy Duty Structural Steel Tubing for Modern Megaprojects In international infrastructure development, global structural steel tubing suppliers face surging demands for larger profiles. As large-scale projects like high-rise buildings, stadium structures, and offshore wind foundations continue t... Read More

EN 10210 S460NH: The Expert’s Guide to Structural Hollow Sections

NAVIGATE: 1. Grade Decode 2. Tech Specs 3. Welding 4. Buyer Alert 5. Tech FAQ This guide serves as a technical reference for S460NH carbon steel structural hollow sections (SHS, RHS, and CHS) manufactured under the EN 10210 standard. Important Note: S460NH is a high-strength, normalized s... Read More

ASTM A53 Grade B Pipe: Spec Guide & Weight Chart

In the competitive world of B2B steel procurement, selecting between ASTM A53 Grade A and Grade B isn’t just a technicality—it’s a decision that impacts your project’s safety margins and your total landing cost. As a leading manufacturer at Tianjin Yuantai Derun Group, we’ve seen how a slig... Read More

API 5L Technical Breakdown: Grades, PSL1 vs. PSL2

In the pipeline industry, API 5L is the standard that keeps everything together. But if you look closely at the spec, it’s not a “one size fits all” document. Choosing between a API 5L Grade B and an API 5L X70, or deciding if a project actually requires PSL2, is where the engineering... Read More

Square & Rectangular Steel Tube Weight and Volume Calculator

  Exclusive Formula by Yuantai Derun: The calculation formulas used in this tool are derived and refined by Yuantai Derun Group through extensive manufacturing data analysis and rigorous engineering derivation. Unlike generic calculators, our optimized algorithm ensures minimal error margin... Read More
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