Recommended Torque Values for Flange Bolting*
Source: ANSI/API 6A, 20th Edition, pp. 311, 312.
* The values shown above are for reference only and should not be relied upon for design calculations
for any specific application or purpose since accurate torque determination is dependent on numerous variables indeterminate from a general reference perspective. The latest edition of the API 6A standard
should be used for that purpose and is available from API at http://api.org/Standards.
Torque Data for Use with Alloy Steel Stud Bolts – Load in pounds on stud bolts when torque loads are applied
* The table above reflects the results of many tests to determine the relation between torque and bolt stress. Values are based on steel bolting well lubricated with a heavy graphite and oil mixture. Reprinted with permission of Crane Co. (Page 383 Crane No. 60 Valve Catalog)