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15/12/2025

After a 16-year Hiatus, China has Once Again Implemented Export Licensing for Steel

On December 12, 2025, the Ministry of Commerce and the General Administration of Customs jointly issued Announcement No. 79, deciding to implement export license management for certain steel products starting from January 1, 2026.

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12/11/2025

In October 2025, China Exported 9.782 Million Tons of Steel

Data on the volume of national imports and exports released by the General Administration of Customs on November 7 shows that China exported 9.782 million tons of steel in October 2025.

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14/10/2025

In September 2025, China Exported 10.465 Million Tons of Steel.

According to the national import and export volume data released by the General Administration of Customs on September 13, China exported 10.465 million tons of steel in September 2025.

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25/09/2025

General Administration of Customs: China exported 5.63 million tons of steel plates in August.

According to the latest data from the General Administration of Customs, in August 2025, China exported 1.63 million tons of steel bars, a year-on-year increase of 51.0%.

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09/09/2025

In August 2025, China Exported 9.51 Million Tons of Steel

The national import and export commodity volume data released by the General Administration of Customs on September 8 showed that China exported 9.51 million tons of steel in August 2025, a decrease of 326,000 tons from the previous month, a decrease of 3.3% from the previous month.

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03/09/2025

China's steel exports are expected to hit a new high this year

China's total steel exports this year are expected to hit a record high. Although exports have remained strong recently, they may fluctuate in the future due to the recovery of domestic demand and trade policies, but new breakthroughs are still expected throughout the year.

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22/08/2025

General Administration of Customs: China exported 6.13 million tons of steel plates in July.

General Administration of Customs: China exported 6.13 million tons of steel plates in July, a year-on-year increase of 19%.

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Answers

What is the standard thickness of the anti-corrosion coating for anti-corrosion steel pipes?
The 3PE anti-corrosion coating consists of an epoxy powder layer, an adhesive layer, and a polyethylene layer. The epoxy powder layer provides adhesion and chemical resistance. The thickness of the epoxy powder layer varies depending on the pipe diameter and grade requirements: no less than 120 μm for DN≤500 mm and no less than 150 μm for DN>500 mm; the total thickness can reach 2.7–2.9 mm in reinforced anti-corrosion applications.
What are the standards and specifications for shaped steel pipes?
1. Dimensional Tolerance: This refers to the allowable dimensional deviation range during the production of shaped steel pipes. The size of the dimensional tolerance directly affects the quality and performance of the shaped steel pipe. Generally, the smaller the dimensional tolerance, the higher the quality of the shaped steel pipe.
2. Appearance Quality: This refers to the absence of obvious defects on the surface of the shaped steel pipe, such as cracks, inclusions, and rust. Good appearance quality not only improves the aesthetics of the product but also reduces problems during subsequent processing and use.
3. Mechanical Properties: This refers to the good strength, toughness, and hardness of the shaped steel pipe. The levels of these properties directly determine the safety and reliability of the shaped steel pipe during use.
4. Chemical Composition: This refers to the content of each element in the shaped steel pipe meeting specific standard requirements. A reasonable chemical composition not only ensures that the performance indicators of the shaped steel pipe meet the requirements but also improves its corrosion resistance and wear resistance.
Regarding the classification of special-shaped pipes:
https://www.chinasteelmarket.com/feature-pages/featureinfo/FEATURE%7C-The-Knowledge-Summary-of-Seamless,-Welded-Steel-Pipes,-Stainless-Steel-Pipes,-and-Special-shaped-Steel-Pipes_1166.html
What is the difference between Q235b seamless steel pipe and Q235d seamless steel pipe?
The core distinction between Q345B and Q345D seamless steel pipes lies in Q345D's superior low-temperature impact toughness at -20°C, achieved through stricter composition control and heat treatment processes. This makes it suitable for critical engineering projects in cold environments, whereas Q345B is primarily used in ambient temperature scenarios. Their differing performance characteristics result in distinct pricing and application boundaries.


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