How should oxygen and acetylene bottles be placed during gas welding to ensure safety?

1. Oxygen cylinder care and storage

1. Avoid contamination with oil during storage and use; it must be stable and reliable when placed, and should not be mixed with other cylinders; it is not allowed to be exposed to the sun or Roast and beat over fire to prevent explosion. No flammable items should be placed around the warehouse. ?

2. The temperature inside the warehouse shall not exceed 30°C, and the distance from the heat source to the open flame shall be 10 meters away. ?

3. Oxygen cylinder pressure reducing valves, pressure gauges, joints and conduits, etc., must be marked.

II. Safety technical operating regulations for acetylene gas cylinders

1. When using, transporting, and storing acetylene gas cylinders, the ambient temperature shall not exceed 40°C.

2. The paint color of the acetylene bottle must be kept intact and must not be arbitrarily altered.

3. Acetylene cylinders must be equipped with a special pressure reducer when in use. Before working on the flashback arrester, you must check whether it is easy to use, otherwise it is prohibited to use it. When opening it, the operator should stand behind the valve and move gently.

4. The operating pressure shall not exceed 0.05Mpa and the gas flow rate shall not exceed 1.5-2.0 m3/hour.

5. When using, attention should be paid to fixing it to prevent tipping. It is strictly prohibited to lie down for use. It is not allowed to open the acetylene bottle that has been laid down and use it directly. It must be stood still for fifteen minutes before use. Connect the pressure reducer before use, otherwise it will be dangerous. Knocking, collision and other rough behaviors are prohibited.

Extended information:

Regulations on the distance between oxygen cylinders and acetylene bottles

Dissolving acetylene cylinders (hereinafter referred to as acetylene bottles) and oxygen during the production process Bottles are widely used in welding and cutting, and are often used at the same time. Oxygen is a combustion-supporting gas, and acetylene is a flammable gas. Oxygen and acetylene are respectively contained in mobile pressure vessels. During use, there are some Problems such as acetylene bottles and oxygen bottles being placed in the same location without a safe distance.

Oxygen bottles are in contact with grease. After the acetylene bottles are rolled horizontally, they are put into use without being placed vertically. The surface temperature of the acetylene bottles is above 40°C, and there is no cover for open-air operations in summer. Oxygen and acetylene bottles are not used in accordance with regulations. Residual pressure, etc., these problems have led to some casualties.

Because acetylene is dissolved and there is acetone in the cylinder, if the tilt angle is below 30 degrees, when the valve is opened (during use), acetone may flow out and mix with air to form an explosive mixture. Explosion limit 2.55% ~ 12.8% (volume).

Oxygen bottles contain high-pressure oxygen, which has both physical and chemical unsafe factors: Physical factors: After oxygen is compressed and the pressure rises, it tends to balance with the surrounding normal pressure. The greater the pressure difference from normal pressure, the greater this tendency.

When a large pressure difference quickly reaches this equilibrium in a very large space in a very short time, it forms what is commonly known as an "explosion". If this equilibrium is achieved over a relatively long period of time through a small gap, a "jet" is formed.

Both can have serious consequences. chemical factors. Since oxygen is a combustion-supporting substance, once it encounters combustible substances and ignition conditions, violent combustion and even explosive fires can occur.

Baidu Encyclopedia-Safe distance between acetylene cylinders and oxygen cylinders