On the issue of gas displacement during internal grinding inspection of pressure vessels
Thread Content
During the production of this pressure vessel, the materials inside are explosive and flammable; what are some effective methods for thoroughly purging them in order to facilitate welding and grinding work inside the vessel? What other protective measures are needed? The best option is the entire package.
It is unknown what explosive substance it is; the following substitution methods can be chosen depending on the actual situation. Fill the entire container with water ； Cook with steam ； After purging with an inert gas, a sample is taken for analysis. Protective measures: Improve ventilation; use forced ventilation if necessary. Use lighting with safe voltage. When polishing, the power supply should be equipped with a leakage protector, as well as insulating gloves and shoes. Sampling and analysis are conducted every half hour, taking into account not only explosion prevention but also the risk of poisoning. Have an air respirator ready and have someone supervise. In short, it is necessary to strictly follow the safety operating procedures for tank entry operations.
Mainly toluene, acrylonitrile, styrene
On the one hand, it is necessary to purge the container in order to prevent fires and explosions. On the other hand, it is important to prevent workers from being poisoned – this is a key concern when entering a container. Generally, the concentration of toxic substances is low; therefore, strict compliance with the regulations regarding work in containers must be observed. The container must be properly isolated from the production system, ventilation must be ensured, power supply must be cut off and safe voltage used. Gas analysis after purging is also required. Workers entering the container must wear gas masks, obtain permits, and have the approval of the safety department. There must also be someone to supervise them, as well as rescue measures in place
In addition, it is important to take samples from the appropriate locations to prevent the situation where a part meets the standards while the overall product does not. Moreover, the person in charge must be responsible and know the necessary first-aid measures. In addition, good ventilation is necessary; it is best to use a hose to continuously supply compressed air inside, and the container should be isolated from all pipes, with 8-shaped blind flanges installed