Technical > T5 Pipe Joining Profile
 
Department of Civil Engineering
University of Illinois
at Urbana-Chanpaign		 David A. Pecknold
Rami M. Hajali
September 1995

   
  Pipe Chart
Report of Analysis #5-30"
   

Structural Analysis of the Permalok Steel Pipe Joining System for 10-inch, 36-inch and 60-inch diameter steel pipe
   
Loading Conditions  


Compression/Tension Table
  10-inch ID
0.375 - WT		 36 – inch OD
0.5 – inch WT		 60 – inch OD
0.75 – inch WT
Loading
Cond.

Axial Force (kips)

Axial Stress
(ksi)

 sa/sy

Axial Force
(kips)

Axial Stress
(ksi)

 sa/sy

Axial Force
(kips)

Axial Stress (ksi)

 sa/sy
Closure 32 2.62 0.073 21 0.38 0.011 68 0.49 0.014
Comp. 440 36 1.0 1967 35.3 0.98 5025 36 1.0
Tension 257 21 0.58 956 17 0.48 1675 12 0.33


Bending Table
Loading
Cond.		 Bend. Mom.2
(psi)

Axial Force
(ksi)

 M/Mp3 Bend. Mom.2
(psi)		 Axial Force
(ksi)		 M/Mp3

Bend. Mom. 2
(psi)

 Axial Force
(ksi)		 M/Mp3
Int. Press. 2650 35.3 0.98 1012 35.4 0.98 910 35.5 0.99
1 Hoop stress sh = pDi / 2t, where p = internal pressure, Di = inside diameter, and t = wall thickness
2 Limiting (maximum) bending moment
3 The plastic moment Mp is calculated from Mp = v [ Do3 – Di3] sy where Di is the pipe ID, Do is the pipe OD, and s y is the yield stress (36 ksi).
Note: 1 in = 25.40 mm
1 kip = 4.448 kN
1 ksi = 6.895 MPa
 1 psi = 6.895 kpa
1 kip in = 0.1130 kNm