Contents

1 Survey step
2 Causes of pressure tanks
3 Procedure steps

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Project: 10m3 LO2 storage tank project of GENCO, Ha Nam Industrial Park Company, Ha Long Industrial Park

Survey step

Evaluate causes, propose solutions, prepare components and supplies to be replaced, equipment, tools, and supplies to be brought to the scene. 3 steps (as follows)

Step 1

The north rig is definitely dry

Step 2

Use seat belts

Step 3

Safely Trained

Step 4

Protective clothing and shoes

Causes of pressure tanks

For newly turbocharged tanks, gas loss due to faulty transportation and installation, dented edges… so the valves, flanges, tank body may be cracked, cracked, broken… so it may affect to negative pressure (vacuum pressure)

For tanks with long-term use: Usually due to the natural decrease in negative pressure through aging teeth, seals, tires, copper, and natural pressure reduction.

Procedure steps

6 steps (as follows)

Step 1

Vacuum – find the first detection point.
Vacuum, negative pressure suspension, monitoring

Step 2

Replace, repair, install some more valves
Add powder. We have powder ready for replenishment

Step 3

Dry the tank, check the cause of the pipe system inside the tank, it is necessary to cut (surgery), some leak points, broken inner pipe, flange system
Safety: The tank will be discharged all the liquefied gas, the valves, the bottom flange, the top will be removed, after 2 hours the remaining O2 will be diffused into the environment. Therefore, it is impossible for O2 to explode.
About the cutting device, there is a protective cover, covered with a thin sheet of corrugated iron to prevent iron filings to ensure safety.
Outside the construction area is covered by canvas.
For broken and stamped inner copper and stainless steel pipes, the contractor will use steam welding to weld copper, and tig welding to connect, or use a fitting connector