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Calculating Bolt Torque Reqt's. in a Gasketed Joint System

Calculating Bolt Torque Reqt's. in a Gasketed Joint System

Calculating Bolt Torque Reqt's. in a Gasketed Joint System

(OP)
I have an application where I'm trying to calculate the required torque (in ft-lbs) on a gasketed pipe joint system.  The application has 1", 1.5" and 2" (nominal) pipe sizes.  One end of the joint used a Tri-Clover 14VA nipple, the other a Tri-Clover 14VB nipple.  (This is a stainless steel application.)  Flanges are standard ASME 150s, roughness about 125-150, four (4) bolt type.   The gasket is a 1/16" white nitrile for food grade applications.  (I don't know the gaskets' exact durometers, but I believe they are in the 55-60 range.)  The bolts (stainless steel hex type) are 1/2" for the 1" and 1.5" pipe sizes and 5/8" for the 2" pipe sizes.  This is a double gasket joint.  The full face gasket has IDs and ODs for the 1", 1.5" and 2" pipe sizes, respectively, as follows (shown as ID/OD):  0.875/4.25, 1.375/5, 1.875/6.  The ring gakset has the following ID/OD values for the same three pipe sizes:  0.875/2.5, 1.375/3.125 and 1.875/4.  The fluid medium is 125 deg F and the piping is heat traced, which I realize has an impact on the bolt's physical properties and, therefore, impacts the bolt torque value.  If someone has the exact algorithm I should follow to perform this calculation or knows where I can get it on the Internet that would be great!  Also, if someone with knowledge on the subject could compare a two-gasket system versus a single gasket system that would be insightful, too.  Personally, I prefer a single gasket system but double is what is being proposed.  THANK YOU.

RE: Calculating Bolt Torque Reqt's. in a Gasketed Joint System

try ASME PCC-1 "Guidelines for Pressure Boundary Bolted Flange Joint Assembly"

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