Why is an elliptical manhole with dimensions of 300x400 installed at the head of the low-pressure steam drum, instead of a circular manhole?
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The last edit to this post was made by *anpangpang on 2015-11-20 08:43. Why is an elliptical manhole with dimensions of 300x400 created in the head of a low-pressure steam drum, instead of a circular manhole?
Sorry, the title was incorrect; it should be the low-pressure drum head. I assume it relates to safety protection? Is using quick release to avoid getting scalded by steam? But it seems like people can’t fit in 300x400; why not use 300X500?
According to the previous standards, a manhole of 300*400 dimensions was used, but now that people are wealthier and there are more obese individuals, it has become difficult to get in. Of course, 300*400 meets the specification requirements