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28/09/2023

CCTV report | Chen Gang, chief designer of China’s first large-scale cruise ship: NISCO cruise ship sheet is a huge breakthrough in the shipbuilding industry

Chen Gang, chief designer of China’s first large-scale cruise ship: NISCO cruise ship sheet is a huge breakthrough in the shipbuilding industry

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28/09/2023

First Coke Oven Battery Put into operation at Risun Weishan, Indonesia

On July 19, 2023, a momentous milestone was achieved as the first coke oven battery of the Risun Weishan cokemaking project successfully pushed its first batch of coke.

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28/09/2023

Hangzhou Iron & Steel Group won the Excellence Award in the 2023 IDC China Future Enterprise Awards.

The list of excellence awards for the 2023 IDC China Future Enterprise Awards was announced, and the "Hangzhou Iron & Steel Group Integrated Intelligent Management and Control Platform" was successfully selected.

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25/09/2023

TISCO concentrates and pellets were released on the steel industry EPD platform

Recently, two product EPD reports of TISCO Mining’s iron ore concentrate and pellets were officially released on the steel industry EPD platform.

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22/09/2023

First in China, HBIS Develops Super High Thickness and Width Hot-rolled Stainless Composite Strips

304+Q235B hot-rolled stainless steel composite strip has a thickness of 16mm and a width of 2060mm. It is the first and highest hot-rolled stainless steel composite strip in China. It can replace stainless steel materials in the production of fluid pipes and has significant cost advantages.

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22/09/2023

The World's First Converter Intelligent Steelmaking Model in Shougang Jingtang Official Operation

Recently, the delivery ceremony of the world's first converter intelligent steelmaking project was held in the main steelmaking control building of the Shougang Jingtang Steel Rolling Department.

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22/09/2023

Jingtang's Composite Plates Supplied to Jiyang Yellow River Grand Bridge Project

A few days ago, Shougang Jingtang's Composite Medium Plates were supplied to the Jiyang Yellow River Highway-Railway Grand Bridge Project generally contracted by the China Railway Construction Bridge Engineering Bureau. They will be used in the deck part of the bridge.

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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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