① Before the water filling test, all accessories and other components welded to the stainless steel reactor body should be fully completed.
② Before the water filling test, all welds related to the tightness test shall not be painted.
③ The water filling test uses fresh water with a temperature not lower than 5 degrees Celsius. For stainless steel reaction vessels, the chloride ion content in the water should not exceed 25mg/L. The water used for aluminum floating roof test should not have a corrosive effect on aluminum.
④ The reinforcement ring should be filled with 0.1-0.2MPa compressed air for weld seam leak detection before the water filling test.
⑤ In the water filling test, it is necessary to strengthen the observation of foundation settlement. If the foundation experiences unacceptable settlement during the water filling test, the water filling should be stopped and the test can only be continued after treatment.
⑥ During the process of filling and draining water, the breathing valve should be opened and the foundation should not be immersed in water. The filling height should be at the highest operating liquid level. When testing the strength of the stainless steel reactor, the liquid level should be maintained at this level for 48 hours. If there is no leakage or abnormal deformation on the stainless steel reactor wall, it is considered qualified. If leakage is found, water should be drained. Before draining, mark and keep the liquid level about 300mm below the leakage point, and then perform welding repair.
⑦ When conducting strength and tightness tests on the top of stainless steel reaction vessels, the water level inside the stainless steel reaction vessel should be slowly filled and pressurized at the highest liquid level (lm). When it reaches the test pressure (1.1 times the design internal pressure), observe that there is no abnormal deformation on the top of the vessel and that there is no leakage in the weld seam, which is considered qualified (coated with soapy water). The stability test of the stainless steel reaction vessel top should be filled with water to the highest designed liquid level and carried out using the method of draining water. During the experiment, the pressure should be slowly reduced until the negative pressure is reached. If there is no abnormal deformation on the top of the stainless steel reaction kettle, it is considered qualified. After the above two tests, the interior of the stainless steel reaction kettle should be immediately connected to the atmosphere and restored to normal pressure. In weather conditions that cause drastic temperature changes, it is not suitable to conduct strength, tightness, and stability tests on the fixed top.
