API Swivel Ring Flange Bending Moment Capacity

[JT100]

I am aware that an API 17D 17SV swivel ring flange will generally have a lower bending moment capacity than the equivqalent API 6A 6BX (or API 17D 17SS) weldneck flange. In the past I have used API 6AF for a guidance on the capacity of a flange, however since this is only applicable for weldnecks I was wondering if anyone could point me in the direction of a similar code or paper written on standard API swivel ring flanges? Or is there a rule of thumb on the difference in capacity?

 

[BigInch]

I have not used these where I expected to have bending and would have had to depend on their moment carrying capacity.

We will design everything from now on using only S.I. units ... except for the pipe diameter. Unk. British engineer

 

[JT100]

No bending at all? What about in subsea piplines/spoolpieces? Wouldnt a WN-WN make up prove a great deal harder for divers?

 

[BigInch]

On subsea tie-ins, where I have used them, 2 clamps on the pipe (clamps 3 to 4 meters apart from each other) go on one side of the SF and also two clamps on the other side (same configuration) with the SF located midway between the two sets of clamps, should be enough to prevent any moment from being transferred to the SF.

We will design everything from now on using only S.I. units ... except for the pipe diameter. Unk. British engineer