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We have compiled a stainless steel standard comparison chart to help you clearly compare standards across different countries, enabling you to make more informed decisions when selecting materials.

In diverse application scenarios and operating conditions, the selection of piping materials is critical to structural strength and project durability. Black iron pipes and black steel pipes are two of the most common types of piping, widely used in various engineering projects. Despite their similar names, they differ in material composition, intended applications, and performance characteristics. This article will explore the definitions and properties of black iron pipes and black steel pipes, providing a comprehensive comparison between them.

In the global steel pipe industry, China has emerged as the world’s largest producer and exporter of steel pipes, leveraging consistent quality, competitive pricing, and extensive product offerings. According to statistics, China’s annual steel pipe production exceeded 1 billion tons by 2024. Chinese steel pipe manufacturers not only meet domestic demand but also supply premium products to international markets. This article highlights China’s top five leading steel pipe manufacturers and suppliers, focusing on their technological advantages, production capacity, and product ranges.

In steel pipe specifications and dimensions, Schedule (SCH) denotes the pipe wall thickness, serving as a key factor in determining the pipe’s pressure rating and strength. A higher Schedule number indicates thicker pipe walls and greater pressure-bearing capacity.

This document contains weight tables for API 5L/ASTM SCH 40 and SCH 80 pipes, enabling you to locate the corresponding pipe weight for each specification. We also provide weight calculation formulas, fundamental parameters, and material density coefficients. By studying these resources, you can easily calculate the weight of pipes made from various materials such as carbon steel, stainless steel, and PVC.