What situations did everyone encounter during sampling?

It is necessary to wear anti-static work clothing and use non-conductive sampling tools. The sample needs to be left undisturbed for a while before sampling. The fire that occurred during sampling, as you mentioned, was caused by static discharge.

The poster should be careful when sampling: 1. No matter how good the anti-static work clothes are, they cannot eliminate human body static electricity 100%; it’s best to install static eliminators at the sampling points, and establish rules in the workshop requiring that one touch these eliminators for a few seconds before sampling. 2. The flow rate of the sample during sampling should not be too fast. 3. Use copper sampling tools, and draw a soft static grounding wire between the device’s static ground connection and the sampler. Don’t be afraid of the hassle – human safety comes first: lol

1. Frozen blockage of the sampling valve: When the sampling valve is opened but no medium to be tested flows out, it is necessary to inform the personnel on duty in the workshop promptly so that the issue can be addressed immediately. It is best not for the person conducting the sampling to handle it on their own; even if they are familiar with the physical properties of the substance to be tested, such action does not comply with the operating procedures. 2. The valve does not close properly after sampling; contact the on-duty staff promptly for handling, as in the previous case. 3. Pay attention to the wind direction: when handling volatile and toxic substances, stand upwind to avoid being exposed to their fumes.

Sinopec on-site construction safety: Wear anti-static clothing and cotton gloves, and use an air respirator when collecting samples of gases with high hydrogen sulfide content. There are touch-based static electricity elimination devices at the entrance; touch them upon entering to eliminate static electricity. Sampling: 1. The person stands in the upwind or side wind direction, and the air guide tube is connected to the sampling port. 2. Once the gas is flowing out slowly and evenly, connect the other end of the gas guide tube to the gas sample bag to begin sampling. 3. After collecting enough gas sample, close the valve of the gas sample bag first, and then close the valve of the sampling port. When sampling gases with high hydrogen sulfide content, the other end of the gas guide tube is first inserted into an alkaline solution, and sampling begins once the gas flows out evenly.