Bolt Tightening Flange Torque Sequence Chart

Bolt Tightening Flange Torque Sequence Chart – 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. As per ansi b31.3 clause no. Even though flange blot toque calculation is possible, they are normally selected from the pipe flange bolt torque chart. Then install and finger tighten all fasteners.

Swg (type 913 and 913m). Flange faces shall be aligned to the design plane within 1 mm in 200 mm (1/16 in. When tightening, always use the correct sequential bolt order for the flange. Or they can be numbered by the.

Bolt Tightening Flange Torque Sequence Chart

The entire bolt pattern shall be tightened at least three times around the flange at 30%, 70%,. Recommended tightening in four steps 20%, 50%, 75% & 100% of. Before they are tightened, bolts can be numbered sequentially (1,2,3,4 etc) in a clockwise direction around the flange (fig 1 below).

While aligning flanges, make sure that there are. 2.0 4 tightening of the bolts 4.1 general the sequence in which the bolts and nuts are tightened. Tighten the nuts and bolts as per the standard tightening sequence (refer to the diagrams below).

Flange bolts holes shall be. /ft) measured across any diameter; If an air wrench is used make sure the pressure is set to the minimum.

Welcome to this interactive flange bolting calculator from hytorc.the program computes recommended torque values , bolting patterns, tool selection and pump pressure. Visually examine the flangealignment to ensure that an acceptable fit has been obtained. Tightening shall be carried out in the following manner using a calibrated torque wrench: