A, material warehouse requirements

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

2, in the warehouse shall not be stacked together with acid, alkali, salt, cement and other corrosive materials to steel. Different kinds of steel should be stacked separately to prevent confusion and contact corrosion.

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

4, small and medium-sized steel, wire rod, steel bar, medium-caliber steel pipe, steel wire and wire rope, etc., can be stored in a well-ventilated material shed, but they must be put on the mat.

5. Some small steel products, thin steel plates, steel strips, silicon steel sheets, small-bore or thin-walled steel pipes, all kinds of cold-rolled and cold-drawn steel products and metal products with high prices and easy corrosion must be put in storage.

6. Pay attention to ventilation in sunny days, close it in rainy days and keep a suitable storage environment.

Second, reasonable stacking, first in first out

1. The principle requirement of stacking is to stack according to varieties and specifications under the condition of stable stacking and ensuring safety. Different varieties of materials should be stacked separately to prevent confusion and mutual corrosion.

2. It is forbidden to store items that have corrosive effects on steel near the crib.

3. The bottom of the crib should be high, firm and flat to prevent the material from being damp or deformed.

4. The same materials shall be stacked separately according to the warehousing order, so as to facilitate the implementation of the first-in-first-served principle

5. Under the section steel piled up in the open air, there must be a wooden mat or stone, and the crib surface is slightly inclined to facilitate drainage, and the materials should be laid flat to prevent bending and deformation.

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

7. There should be a certain passage between the cribs. The inspection passage is generally O．5m, and the access passage is generally 1.5 ~ 2.0m depending on the material size and transportation machinery.

8. Raise the bottom of the crib. If the warehouse is a cement floor facing the sun, it can be raised by O．1m; If it is mud, it must be raised by 0.2 ~ 0.5m.. If it is an open-air site, the height of cement ground pad is 0.3 ~ 0.5m, and that of sand and mud surface pad is 0.5 ~ 0.7m.

9. The angle steel and channel steel stacked in the open air should be laid down, that is, the mouth should face down, and the I-beam should stand upright, and the I-slot surface of the steel should not face up, so as to avoid water rusting.

Third, keep the warehouse clean and strengthen the material maintenance.

1. Before warehousing, materials should pay attention to prevent rain or impurities. Materials that have been drenched or stained should be wiped by different methods according to their properties, such as steel wire brushes with high hardness and cloth and cotton with low hardness.

2. Check the materials regularly after warehousing. If there is corrosion, the corrosion layer should be removed.

3. Generally, after the steel surface is cleaned, it is not necessary to apply oil, but for high-quality steel, alloy steel sheet, thin-walled pipe, alloy steel pipe, etc., after rust removal, the internal and external surfaces of the steel must be coated with antirust oil before storage.

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