zhang Yu

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.

Duplex steel pipe (22-25% Cr) offers superior strength, chloride corrosion resistance, and cost-effectiveness for oil, gas, and chemical industries.

We have successfully fulfilled a 1,000-ton order for seamless steel pipes from our South Korean client. The customer has expressed high praise for our product quality and delivery speed, further solidifying our cooperative relationship.

On the occasion of the National Day and Mid-Autumn Festival double holiday, Yantai Xinbaoshang expressed gratitude and care for its employees through heartwarming activities and special benefits, uniting the team to jointly wish our nation prosperity and a bright future.

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.

We successfully secured a 500-ton order for seamless steel pipes with our Turkmenistan client. Through efficient land transportation, the shipment was delivered smoothly. The client highly praised our product quality and service, further solidifying our long-term cooperative relationship.

On September 3, 2025, Xinbaoshang Company hosted a warm birthday celebration for Jessica, showcasing our “people-oriented” corporate culture. We wish her both professional and personal success in the coming year!

On September 3, 2025, the military parade marking the 80th anniversary of the victory in the War of Resistance Against Japanese Aggression, held at Tiananmen Square in Beijing, not only highlighted the significant contributions made by the Chinese people in the fight against fascism but also profoundly embodied the spirit of the nation, inspiring us to remember history and look toward the future.

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.

The United States plans to impose a 50% tariff on Indian goods starting August 27. This move stems from India’s imports of Russian oil and may have far-reaching implications for U.S.-India trade relations and the global economy.

In July 2025, we signed a 700-ton seamless steel pipe order with our Algerian client. Following successful delivery, the order received high praise from the client, solidifying our long-term cooperative relationship.

Discover YANTAIPIPE, a leading manufacturer of high-quality seamless steel pipes. Explore our extensive product line, advanced production capabilities, and expert FAQs.

Welded steel pipes are formed by rolling and welding steel, offering cost-effective, versatile sizing and enhanced seam strength for energy and industrial uses.

Pipeline pipes are API/ASTM-standard steel tubes for fluid transport, offering pressure resistance and corrosion protection in oil, gas, water, and industrial networks.