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14/11/2023

Yonggang products were once again certified as “Jiangsu Premium Products”

The Jiangsu Quality Conference was held on October 27. At the meeting, the first batch of "Jiangsu Premium" certification companies were released in 2023. Yonggang Group's "Hot-rolled Wire Rod for Steel Cord" was successfully listed.

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10/11/2023

TISCO’s high-quality stainless steel helps build China’s Antarctic “fifth station”

Recently, a batch of construction stainless steel customized by Taiyuan Iron and Steel Group for customers successfully arrived at the customer's production site and will be used in the construction of metal roof and wall enclosure systems for Ross Sea New Station, my country's fifth Antarctic scientific research station.

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10/11/2023

HBIS Exclusively Supplies the Guangzhou-Zhanjiang High-Speed Railway Project with over 70,000 Tons of 100-Meter High-Speed Heavy Rail

HBIS exclusively supplies the Guangzhou-Zhanjiang high-speed railway project with over 70,000 tons of 100-meter high-speed heavy rail.

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08/11/2023

Replacement of Imports! HISCO's Ultra-Thick Coated Aluminum Plate Helps Build the Key Project of National Natural Gas Production, Supply, Storage and Marketing System

HISCO's ultra-thick coated aluminum plate helps build the key project of national natural gas production, supply, storage and marketing system.

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07/11/2023

Xiangtan Steel was selected as a national smart factory

Recently, the Ministry of Industry and Information Technology announced the list of places and outstanding scenarios for the 2023 intelligent manufacturing demonstration factory, the medium-thick plate intelligent manufacturing demonstration factory applied by Xiangtan Steel was successfully selected.

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03/11/2023

The Forging Flange Project of Jiuquan Tiancheng Company, a Subsidiary of Western Heavy Industry, has Completed the Trial Production.

The forging flange project of Jiuquan Tiancheng Company, a subsidiary of Western Heavy Industry, has completed the trial production.

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02/11/2023

Shaanxi Iron and Steel Group and Jingzhou Railway jointly held a business negotiation meeting on the forward movement of iron ore inventory

On October 24, the iron ore inventory forwarding business meeting hosted by Shaanxi Iron and Steel Group and hosted by Jingzhou Local Railway was held in Jingzhou City.

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Answers

What are the differences in thickness and production process between medium and thick steel plates and hot rolled steel plates?
Medium and thick steel plates refer to steel plates with a thickness between 4-60mm, and their production processes mainly include hot rolling cold rolling, and medium and thick plate rolling. Hot rolling is to produce steel plates by continuous rolling after heating the steel billet to a certain temperature; cold rolling is to produce steel plates by continuous rolling after cooling the steel billet to a certain temperature; medium and thick plate rolling is to roll the steel plates produced by hot rolling or cold rolling again to achieve the required thickness.

Hot rolled steel plates refer to flat steel plates produced by hot rolling, and their thickness is generally between 3-20mm. The production process of hot-rolled flat plates mainly includes hot rolling, pickling, and leveling. Hot rolling is to produce steel plates by continuous rolling after heating the steel billet to a certain temperature; pickling is to remove the iron oxide and impurities on the surface of the steel plate; leveling is to level the steel plate through a leveling machine to achieve the required flatness.
What are the differences between PE lining and plastic coating?
PE lining is made of thermoplastic plastic pipes such as polyethylene (PE), heat-resistant polyethylene (PE-RT), cross-linked polyethylene (PE-X), and so on, which are lined on the inner wall of steel pipe according to the requirements of the conveying medium, so it has the advantages of both steel pipe and plastic pipe.
Plastic-coated composite steel pipe is a steel-plastic composite product with steel pipe as the base material and plastic powder as the coating material, with a plastic layer melt-coated on the inner surface and a plastic layer or other material anti-corrosion layer melt-coated on the outer surface.
According to the different inner coating materials, there are two types, one is polyethylene-coated steel pipe. The other is epoxy resin-coated steel pipe.
What are the acceptance criteria for hot-dip galvanized square tubes?
Hot-dip galvanized square tubes are generally judged to be qualified based on the appearance of the product. If the outer wall of the square tube has plating defects, pitting, white spots, heavy skin, bubbles, greening, etc., and the frequency of occurrence is too high, it is judged as an unqualified product. However, the product standard has a specified range for the allowable deviation of the product, which should meet the design requirements and relevant standards.


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