MntnrMark
Mechanical
- Nov 6, 2005
- 1
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.
