Flat cover opening reinforcement calculation
Thread Content
The upper manhole cover of some reactors often has the structure shown below, according to GB 150-2011 6.3.4.1 The diameter of the middle opening dop ≤ 0.5D0 is calculated as the reinforcement of the flat cover opening, and the larger diameter is calculated as the flange. If the diameter of the middle opening is calculated as the reinforcement of the flat cover opening, how to input the takeover data here? It feels like it's a bit too reasonable to input the small endian size.
The opening of the flat cover is not reinforced with a reinforcing ring. You should enter it in the calculation of the flat cover.
The opening of the flat cover is in the head--"Flat cover part, enter the opening here, and the flat cover is thickened as a whole
Oh, this is a loser. After I entered it, I was prompted with this, which means that it cannot be considered as a flat cover, but must be calculated as a flange, right?
Then you calculate based on the flange and don’t use openings for reinforcement.
If a single hole is opened and the ratio is less than 0.5, the opening there does not need to be lost in the calculation of the flat cover. When calculating the opening reinforcement of the nozzle, it is usually processed by thickening the flat cover. If there are multiple holes and the diameter is less than 0.5, the sum of the diameters of the holes must be entered in the calculation of the flat cover. If the opening diameter exceeds 0.5, the flat cover is calculated as a flange.
Please tell me, the diameter of the opening in the standard is less than 0.5Do. Here Do refers to the calculated diameter of the flat cover. For a bolted flat cover, where does this Do refer to? Does it mean the bolt circle diameter? After I entered the dimensions according to the above, the calculation prompted me that I could not calculate. Later, I could only use the flange to calculate.
Has this problem been solved? ? What does D0 refer to? It’s on the flange cover.