Pn16 flange torque settings

Adjust the position of the nuts to insure that 2-3 threads is visible above the top of the nut. Correct tightening of a bolt means making the best use of the bolt's elastic properties. Variation in friction coefficients affect the amount of preload achieved at a specific torque. This Table is applicable to Never-Seize paste and Fel-Pro lubricant, K0.16. The most common cause of leaky gasketed joints is improper installation procedures. The Final Torque Value accounts for 10 bolt relaxation. Before using a given torque table, these assumptions should be verified to insure they are appropriate for the specific application.

Flange Bolt-Up - Torque Tightening, Preload, Torque

If your job includes putting equipment together, assembling flanged pipe, bolting manhole covers or other bolted connections on equipment, or other equipment assembly, remember that the job is not complete until all of the bolts are properly installed and tightened. If you observe improperly bolted flanges in your plant, report them so they can be repaired, and make sure the required repairs are completed. Visually inspect all bolts and nuts for damaged or corroded threads. Replace or repair bolts or nuts as necessary. D1 C2 H1 H2 H3 R A. Hardened washers are recommended in most applications. The most common cause of leaky gasketed joints is improper installation procedures.

Flanges are designed so that the entire nut-bolt combination holds the forces on the flange. The first pass, lightly tighten the first bolt then move directly across or 180 degrees for the second bolt, then move1/4 turn around the circle or 90 degrees for the third bolt and directly across for the fourth. Continue this sequence until all bolts are tightened. The above Table is applicable only for A193 Grade B7 and A193 Grade B16 Stud Bolts.

Pn16 Flange Torque Settings - Books Online

If the nut is only partially screwed onto the bolt, the connection may not be strong enough. The picture show a improperly bolted flange, because two bolts are too short, and the nuts are not completely on the bolts. Higher friction results in less conversion of torque to preload. Inspect new equipment, or equipment which has been re-assembled after maintenance, to make sure it is correctly assembled and properly bolted before starting up. PUBLIC "-/WC3/DTD XHTML 1,0 Transitional/EN" "http www. Before using a given torque table, these assumptions should be verified to insure they are appropriate for the specific application. Adjust the position of the nuts to insure that 2-3 threads is visible above the top of the nut. Check pipes and equipment for properly bolted flanges as part of your plant safety inspections. The selection of the proper flange bolt tigtening technique requires experience. The above Table is applicable only for ASTM A320 Grade B8, Class 2 and A193 Grade B8, Class 2 Stud Bolts. A key to reducing these effects is proper gasket installation. Improper flange connections - the bolts are too short!

The value for the friction coefficient provided by the lubricant manufacturer must be known to accurately establish the required torque value. Even if all assumptions are appropriate, results may vary depending on actual conditions. The successful application of any technique also requires qualification of both the tools that will be used and the crew who will do the work. This tension load is of course equal and opposite to the compression force applied on the assembled components. Notes: Bolting torque to develop 70 Bolt Yield Stress at Nut Factor, K0.16. D1 C2 H1 H2 H3 R A.