After long-term use of the medium-pressure steam pipelines in the device
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After long-term use, leakage occurred at the flanges of the medium-pressure steam pipelines in the unit; this was addressed by using clamping tools. In the dry gas hydrogen production unit, however, leakage appeared at the flanges of the medium-pressure steam pipelines right after the unit started operating, and a large number of clamping tools were used to deal with this issue； Is it the quality of the steam, the quality of the water, or an issue with the flange surface? However, after proper treatment and the use of graphite gaskets, leaks basically do not occur ； Does it matter? ?
When the temperature rises to around 200 degrees, it becomes hot and tight; as the temperature continues to rise, the tension increases. Using graphite paper or sealant will work, and the flanges must be tightened evenly. This is all basic
Now the quality of metal wound gaskets is poor as well.
Be careful with heat retention, temperature changes, thermal expansion and contraction; flanges are prone to leakage
The start-up and shutdown phases of medium-pressure steam pipelines are prone to leaks, as the temperatures are high. Generally, few plants operate in accordance with the prescribed preheating rates; sudden changes in temperature can easily lead to leaks at the flanges
What gaskets do you use? We’ve never had the 8-corner pads we use here
The octagonal pads we use – 8 out of 10 of them leak. Are there any particular requirements when it comes to the octagonal pads you use?
OP, what gaskets are you using for medium-pressure steam at the moment?