Industry News

Did You Buy the Hot-dip Galvanized Steel Grating Right?

October 19, 2020

Steel grating is made of domestic high-quality Q235 low-carbon steel as raw material, and the surface is hot-dip galvanized to prevent oxidation. It can also be made of stainless steel, but the cost is higher. The cross bar of the steel grating is generally composed of twisted square steel, which can be used for gutter cover, steel structure platform plate, step plate of steel ladder and other products. As steel grating has the properties of ventilation, lighting, heat dissipation, anti-slip, explosion-proof, etc., the hot-dip galvanized steel grating has been widely used and recognized as a new building material in many industries around the world. As the demand for steel gratings continues to increase and manufacturers continue to increase, some users will feel they do not know how to choose when purchasing steel gratings. How to choose steel grating? Did you buy the hot-dip galvanized steel grating? Guitai Steel Grating teaches you to judge the quality of the purchased hot-dip galvanized steel grating.

First, first see if galvanizing is hot-dip galvanized. Tips for identifying galvanized steel grids: Galvanized steel grids are divided into electro galvanized (cold galvanized) and hot galvanized. Some customers have purchased galvanized online. After being used for a period of time, the steel grating is found to be rusty because it is cold galvanized and hot-dip galvanized will not rust. This often happens because the client lacks some expertise.

1. When buying galvanized steel gratings, touch the thickness of the steel grating with your hands. The thickness of the ordinary ordinary galvanized steel grating is thinner, the thickest is 10um, while the thickness of the galvanized steel grating is Reach over 70um.

2. It depends on the manufacturer's quotation. Basically, the thickness of the galvanized layer is high, and the price can be higher, but it is not much higher. Through the comparison of multiple manufacturers, if the price difference is too much, then it must be fake or the quality must be unqualified.

Second, the workmanship of the steel grating: the purchase of the steel grid plate has a flat surface and a small welding gap. Such a steel grid plate has a fine and solid workmanship. The manufacturing process of the steel grid plate is not complicated, but it has high requirements for welding technology: Generally, the welding is performed by a fully automatic computer-controlled welding machine, while the pressure-welded steel grid plate is loaded by flat steel and crossbars at a certain distance. After being arranged by Wei, the 200-ton hydraulic resistance welding automation equipment was used to weld the original plate, and the products required by the customer were further processed after cutting, drilling, and other processes. The center distance between two adjacent flat steels is usually 30mm and 40mm. Crossbar distance: The center distance between two adjacent crossbars is usually 50mm and 100mm. Others can be produced according to customer requirements. Various types of steel grille plate products can also be ordered according to customer requirements. For the selection of the type of steel grating: know the bearing value and installation span, and it is convenient for the manufacturer to choose the type of steel grating according to the "Relationship Table of Safe Load and Span and Deflection".

Third, the price of hot-dip galvanized steel grating: Many customers only one-sidedly pursue the price of steel grating when inquiring and purchasing. Of course, everyone wants to buy good quality products at the cheapest price. But there are a lot of misunderstandings about the purchase of steel gratings. Low-priced steel grating products are generally due to the large error in flat steel thickness. In this way, there is a safety hazard for the occasions where the load force is relatively high. In terms of production capacity and financial capacity, it is best to choose manufacturers with good reputation and guaranteed quality to cooperate.

Forth, Whether the steel grating is regular after installation: generally rectangular (rectangular); whether the welding points are fully welded and firm. Special attention is required if it is a hand-welded steel grating. Whether the cut of the twisted square steel (twisted steel) welded on the edge can be parallel to the flat-edged flat steel. Whether zinc slag and welding slag are clean.

Fifth, The purchase of steel grating platform should meet the following requirements: 1. When the design load value is 1.5, it shall be ensured that permanent deformation will not occur. 2. When the design load value is 3.0, it shall be ensured that no fracture will occur.