MSS SP-97 Fitting Dimensions and Applicable Main Pipe Sizes
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In the American standard for branch pipe supports, only the height of the support is specified; how are the other dimensions determined? How is the applicable nominal size determined?
The size of this fitting must match that of the actual piping in use; for example, if the branch pipe is 1-1/2", the main pipe should be 24". This needs to be specified when placing the order, because depending on the size of the main pipe, the curvature at the junction between the main pipe and the branch pipe fitting varies. There are standards for the height, as well as for the branch pipes, but no standard exists for the main pipe. It is necessary to specify this based on the actual piping layout, and it must be mentioned during ordering; otherwise, the curvature may not be consistent
Yes, there is no detailed information according to GB19326.
19326 is also based on MSS SP-97
Other dimensions (such as the outer diameter of the pipe seat and the diameter of the opening in the main pipe) depend on the manufacturer’s corporate standards. It’s not necessarily fixed; it can be changed according to the actual situation. As for the dimension of the boss, it should be determined by the customer; this affects whether the end face of the pipe seat can be made flat and also the degree of curvature.