Flange Dimension Lookup
Opens the Flange Dimension Lookup dialog box, which allows you to define general flange properties for weld neck flanges. The software then fills in flange and gasket dimensions with the closest standard size. For more information, see Flange Dimension Lookup Dialog Box.
Material
Defines the bolt material. Click to open the Materials dialog box. Select a material from the list.
Effective Bolt Diameter (dBe)
Adapted from Figure 2, EN 1591-1:2001+A1, Flanges and their joints - Design rules for gasketed circular flange connections - Part 1: Calculation method |
Defines dBe, the effective bolt diameter. This is generally the nominal diameter minus threads.
Nominal Bolt Diameter (dB0)
Adapted from Figure 2, EN 1591-1:2001+A1, Flanges and their joints - Design rules for gasketed circular flange connections - Part 1: Calculation method |
Defines dB0, the nominal diameter of the bolts.
If you use Flange Dimension Lookup , the software defines a value for this field.
No. of Joint Remakes (RNR)
Defines RNR, the number of times the flange assembly is remade during the life of the flanges.
Number of Bolts (RnB)
Defines RnB, the number of bolts in the flange assembly.
If you use Flange Dimension Lookup , the software defines a value for this field.
Waisted Bolt Diameter (dBs)
Adapted from Figure 2, EN 1591-1:2001+A1, Flanges and their joints - Design rules for gasketed circular flange connections - Part 1: Calculation method |
Defines dBs, the shank diameter of the bolt after plastic deformation.
Between Nuts Length (lB)
Adapted from Figure 2, EN 1591-1:2001+A1, Flanges and their joints - Design rules for gasketed circular flange connections - Part 1: Calculation method |
Defines lB, the length of the bolt between nuts, or between the bolt head and the nut.
Bolting-Up Method (Epsilon 1-)
Defines e1-, the scatter value of the initial bolt load below the target value. Scatter is due to the inherent inaccuracies of bolt tightening.
|
|
Factors |
e1- |
---|---|---|---|
Manual with |
Operator feel, uncontrolled |
Friction |
0.3 + 0.5m |
Impact wrench |
Friction |
0.2 + 0.5m |
|
Torque wrench |
Measure torque |
Friction |
0.1 + 0.5m |
Hydraulic tensioner |
Measure hydraulic pressure |
Stiffness |
0.20 |
Wrench or |
Measure bolt elongation |
Stiffness |
0.15 |
Wrench |
Measure turn of nut |
Stiffness |
0.10 |
Wrench |
Measure torque and turn of nut |
Calibration |
0.07 |
Adapted from Table GA.8-2, EN 13445-3:2014+A2:2016 |
Bolting-Up Method (Epsilon 1+)
Defines e1+, the scatter value of the initial bolt load above the target value. Scatter is due to the inherent inaccuracies of bolt tightening.
|
|
Factors |
e1+ |
---|---|---|---|
Manual with |
Operator feel, uncontrolled |
Friction |
0.3 + 0.5m |
Impact wrench |
Friction |
0.2 + 0.5m |
|
Torque wrench |
Measure torque |
Friction |
0.1 + 0.5m |
Hydraulic tensioner |
Measure hydraulic pressure |
Stiffness |
0.40 |
Wrench or |
Measure bolt elongation |
Stiffness |
0.15 |
Wrench |
Measure turn of nut |
Stiffness |
0.10 |
Wrench |
Measure torque and turn of nut |
Calibration |
0.07 |
Adapted from Table GA.8-2, EN 13445-3:2014+A2:2016 |
Reduced Diameter Length (ls)
Adapted from Figure 2, EN 1591-1:2001+A1, Flanges and their joints - Design rules for gasketed circular flange connections - Part 1: Calculation method |
Defines ls, the length of the bolt where the diameter has been reduced after plastic deformation.
Friction Coefficient (MU)
Defines m,the friction coefficient between the bolt and the flange.
|
m |
---|---|
Smooth, lubricated surfaces |
0.10 to 0.15 |
Average, "normal" conditions |
0.15 to 0.25 |
Rough, dry surfaces |
0.20 to 0.35 |
Use the highest values for austenitic steels.