1、 Material warehouse requirements

1. Keep the material warehouse clean and well drained, and keep away from harmful gases or dust. Weeds and all debris should be removed from the site to keep the steel clean

2. Materials that are corrosive to steel such as acids, alkalis, salts, and cement should not be stacked together in the warehouse. Different types of steel should be stacked separately to prevent confusion and contact corrosion

3. Large section steel, steel rails, steel plates, large diameter steel pipes, forgings, etc. can be stacked in the open air

4. Small and medium-sized section steel, wire rods, steel bars, medium diameter steel pipes, steel wires, and wire ropes can be stored in a well ventilated material shed, but they must be covered with tarpaulins and cushioned underneath

5. Some small steel products, thin steel plates, steel strips, silicon steel sheets, small diameter or thin-walled steel pipes, various cold rolled and cold drawn steels, and expensive and easily corrosive metal products must be placed in storage

6. Pay attention to ventilation in sunny days, close the door to prevent moisture in rainy days, and always maintain a suitable storage environment

2、 Reasonable stacking, first in, first out

1. The principle requirement for stacking is to stack materials according to varieties and specifications under stable and safe stacking conditions. Different types of materials should be stacked separately to prevent confusion and mutual corrosion

2. It is prohibited to store items that have corrosive effects on steel near the stacking position

3. The bottom of the stack should be raised, firm, and flat to prevent moisture or deformation of the material

4. The same kind of materials are stacked separately according to the warehousing order, facilitating the implementation of the principle of first in, first out

5. For section steel stacked in the open air, there must be wooden mats or stones underneath, with the stack surface slightly tilted to facilitate drainage, and attention should be paid to placing the materials flat and straight to prevent bending and deformation

6. The stacking height shall not exceed 1.2m for manual operations, 1.5m for mechanical operations, and 2.5m for stack width

7. A certain passageway should be reserved between the stacks. The inspection passageway is generally O.5m, and the access passageway depends on the size of the material and the transportation machinery, which is generally 1.5-2.0m

8. The height of the pile bottom can be increased by 0.1m if the warehouse is a cement floor in Chaoyang; If the ground is muddy, it must be raised by 0.2~0.5m. If it is an outdoor site, the cement ground shall be cushioned with a height of 0.3-O.5m, and the sand and mud surface shall be cushioned with a height of 0.5-O.7m

9. When stacking angle steel and channel steel in the open air, they should be placed downwardly, that is, the mouth should be downward, and the I-shaped steel should be placed vertically. The I-shaped groove surface of the steel should not be upward to prevent water accumulation and rust.

3、 Keep the warehouse clean and strengthen material maintenance

1. Before warehousing materials, attention should be paid to preventing rain or impurities from mixing. Materials that have been soaked or contaminated should be cleaned using different methods according to their properties, such as using a wire brush for high hardness materials, and using cloth, cotton, and other materials for low hardness materials

2. After warehousing, materials should be regularly inspected, and if there is any rust, the rust layer should be removed

3. Generally, after cleaning the surface of steel, it is not necessary to apply oil. However, for high-quality steel, alloy thin steel plates, thin-walled pipes, alloy steel pipes, etc., after rust removal, their internal and external surfaces need to be coated with antirust oil before storage

4. Steel with severe corrosion should not be stored for a long time after rust removal, but should be used as soon as possible.