EZ Calc - Bolting Calculator

An Oline Tool to Estimate Required Torque Values

Determines Torque, Bolt Load and Percent Yield of Maximum Load of the Bolt

Units   English   Metric

 

Flange Data
Flange Type
Flange Class
Flange Size

Fastener Data
Fastener Type   Bolt   Stud
Fastener Material  
Number of Fasteners: x  
Fastener Diameter: x x
Threads Per Inch: x  
Fastener Length: x x
Nut Size (across flats): x x
Grip Length: x x
Max Load: x x

Torque Estimating Tool Select the known parameter and fill in its value
 Percent Yield      Bolt Load     Torque

Value:    x    

K Factor Value:         See below for K Factor examples.

Calculated Values Bold font indicates known parameter.
Torque   0   x
x
Bolt Load   0   x
Percent Yield   0   %

 

NOTE: EZ Calc uses the Mechanical Engineering "Short Formula" (see below) and other estimating techniques, which can be subjective. Results and Outputs should be used as guidance.  Enerteq Solutions, Inc. assumes no responsibility for the use of these calculations.
     
x
  

 

 

K Factor Examples

Choose the K-FACTOR that most closely matches your conditions.

 

K Factors are constants that relate to the torque applied to the load induced in the fastener.

 

This factor is affected by the condition of the fasteners, the lubricants used and the condition of the flange.

 

K Factor EXAMPLES:

 

K Factor

Description

0.11

FastLube (teflon base)

0.15

New Xylan coated steel bolts and nuts with 1/4 in. thick washers. Lubricated on all mating surfaces of washers, studs, and nuts with Moly Paste containing 70% solids.

0.13

New steel bolts and nuts with 1/4 in. thick washers. Lubricated on all mating surfaces of washers, studs, and nuts with Molybdenum disulphite Paste containing 70% solids.

0.145

Moly-Lead Oxide-Graphite

0.145

Copper-Graphite

0.15

Nickel/Graphite

0.16

New steel bolts and nuts with 1/4 in. thick washers. Lubricated on all mating surfaces of washers, studs, and nuts with Molybdenum disulphite Paste standard grade ASTM D566, ASTM D92, ASTM D217, ASTM D4048, ASTM D259.

0.16

New Xylan 1052 (manganese-phosphate plate) coated steel bolts and nuts without 1/4 in. thick washers. No lubrication.

0.17

Used Xylan coated steel bolts and nuts with 1/4 in. thick washers. Lubricated on all mating surfaces of washers, studs, and nuts with Moly Paste containing 70% solids.

0.17

API SA2

0.18

New Xylan 1070 (manganese-phosphate plate) coated steel bolts and nuts without 1/4 in. thick washers. No lubrication.

0.18

New Xylan 1014 (manganese-phosphate plate) coated steel bolts and nuts without 1/4 in. thick washers. No lubrication.

0.19

New Xylan 1052 (zinc-chloride plate) coated steel bolts and nuts without 1/4 in. thick washers. No lubrication.

0.2

Used steel bolts and nuts with 1/4 in. thick washers and cleaned threads. Lubricated on all mating surfaces of washers, studs, and nuts with Moly Paste containing 70% solids.

0.2

New Xylan 1070 (zinc-chloride plate) coated steel bolts and nuts without 1/4 in. thick washers. No lubrication.

0.2

New Teflon (heavy) coated steel bolts and nuts without 1/4 in. thick washers. No lubrication.

0.23

Machine oil

0.33

New dry steel with hardened 1/4" washers- No lubricant.

0.45

New dry steel with NO washers- No lubricant.

 

Mechanical Engineer's "Short Formula"

Mechanical Engineer's "Short Formula"

T = K x L x D

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

T = torque in inch/pounds (Newton/meters)

K = K Factor (see above)

L = bolt load in pounds (Newtons)

D = bolt diameter in inches (meters)

Connections

 

  

 

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Tool Rental Solutions for Turnarounds and Major Maintenance Projects

 

 

EZ Calc - Bolting Calculator, Enerteq's oline tool for estimating Required Torque Values. Use to determine Torque, Bolt Load and Percent Yield of Maximum Load of Bolts.