The original plate refers to a semi-finished product sold directly by a steel grating pressure welding machine after welding, without undergoing segmentation or hot-dip galvanizing treatment. The original steel grating is generally sold in foreign markets, and dealers in other countries are generally used as inventory. According to the needs of their domestic customers and the specific conditions of use, they are divided, hemmed, and hot-dip galvanized to make it a finished product for sale. This method can greatly save processing time, greatly increase packing volume, and reduce shipping costs.

The original steel grating board is generally 1m x 6m, 1m x 5.8m. Surface hot-dip galvanized or untreated, 6m steel grating is suitable for loading 40 foot containers, and 5.8m is suitable for loading 20 foot containers. The width and length can also be adjusted according to customer needs. Suitable for on-site cutting and dealer sales. The original board is divided into edge wrapped and non edge wrapped types, which are made according to customer requirements. If it is used for cutting, it is recommended not to edge wrap to save costs. The original packaging is usually bundled with straps, and then fumigated wooden blocks are placed between the bundles for easy loading and unloading. It can also be used as a chassis.

Quality specifications and requirements

The steel grating board must comply with the YB/T 4001-2007 Chinese Steel Grating Board Standard of the People's Republic of China; The material complies with the Chinese steel standard GB 700-88; Galvanization meets the Chinese hot-dip galvanizing standard GB/T13912-2002. (Note: The platform plate and trench cover plate are cut from the original plate, and the welding quality and dimensional tolerances of the grid plate are consistent with the original plate. This statement is not repeated.)

1. The length tolerance of the steel grating plate is (0, -5mm), the width tolerance is ± 5mm, and the diagonal tolerance is ≤ 4mm Others meet the requirements of the national standard YB ／ T4001.1-2007, and the distance from the Fried Dough Twists steel center at both ends of the product to the product edge is 50mm (tolerance is ± 5mm);

A. The spacing between flat bars is 30mm, and the width is 995mm or 993mm (the thickness of flat bars is 5mm or 3mm)

B. The spacing between flat bars is 40mm, and the width is 1005mm or 1003mm (the thickness of flat bars is 5mm or 3mm)

C. The spacing between flat bars is 60mm, and the width is 965mm or 963mm (the thickness of flat bars is 5mm or 3mm)

2. The load-bearing flat steel must be straight, evenly spaced, cut flat, and without any misalignment;

3. Between the cross bar and the flat steel, there should be no missing or faulty welding. A 120kg force should be applied to test whether the Fried Dough Twists steel is soldered off. Individual open solder joints should be ≤ 3%;

4. The head of the crossbar should be flush, and the size of the head protruding from the outer load flat steel should be less than 1 millimeter. The polishing of the crossbar head should not damage the flat steel of the steel grating body.

5. The welding method is pressure welding. The height of the solder joint shall not be higher than 1.5mm on the upper end face of the flat steel;

6. The weld seam must be full, and the appearance of the weld seam must be smooth without any false welding phenomenon.

7. The product should not have welding gaps and should avoid acid water leakage at the weld seam as much as possible. If it is severe, the product needs to be replaced.

8. The product cannot have strokes (including chalk) on it.

9. According to customers