Enter the number of splits in the ring, if any, for loose type flanges. This value must be either 0, 1, or 2. Typically split flanges are ring-type flanges. A split is used when it is required to have the flange completely removable from the vessel. If the flange is split into two pieces by a single split, the design moment for the flange is multiplied by 2.0. If the flange consists of two separate split rings, each ring shall be designed as if it were a solid flange - without splits) using 0.75 times the design moment. The pair of rings shall be assembled so that the splits in one ring shall be 90º deg. from the splits in the other.
If the flange is split into two pieces by a single split, the design moment for the flange is multiplied by 2.0. Above diagram shows a ring with a single split.
If the flange consists of two separate split rings, each ring shall be designed as if it were a solid flange (without splits) using 0.75 times the design moment. The software automatically considers this. The flange thickness in the input (and the required value) is the thickness of the quarter piece. So, the thickness of the total ring is twice this value.
The pair of rings shall be assembled so that the splits in one ring shall be 90º from the splits in the other. The above diagram shows a flange with two splits.