caesar How can the maximum stress be reduced so much after cold tightening?
Thread Content
When calculating with caesar, because the expansion is relatively large, I used cold tightening. However, after using it, I calculated that the secondary stress has not changed, but the maximum allowable stress has decreased by 30%. The previous stress level was 60% and became 90% after cold tightening. Please help.
Please post the specific data to see if you can answer.
Piping Code: B31.3 -2004, April 29, 2005 CODE STRESS CHECK PASSED : LOADCASE 3 (EXP) L3=L1-L2 Highest Stresses: (N./sq.mm. ) CodeStress Ratio: 62.3 @Node 418 Code Stress: 197.2 Allowable: 316.6 A* al Stress: 3.8 @Node 49 Bending Stress: 197.3 @Node 140 Torsion Stress: 28.9 @Node 20 Hoop Stress: 0.0 @Node 20 3D Max Intensity: 345.9 @Node 140 NODE Bending Torsion SIF In SIF Out Code Allowable Ratio Stress Stress Plane Plane Stress Stress % N./sq.mm. N./sq.mm. N./sq.mm. N./sq.mm. 10 134.85 -28.90 1.000 1.000 146.71 305.81 47.98 20 84.33 28.90 1.000 1.000 102.24 309.43 33.04 20 0.00 0.00 0.000 0.000 0.00 0.00 0.00 30 0.00 0.00 0.000 0.000 0.00 0.00 0.00 30 48.97 -28.90 1.000 1.000 75.76 312.59 24.24 38 22.58 28.90 1.000 1.000 62.05 315.50 19.67 38 56.99 -28.90 2.649 2.208 81.17 311.43 26.06 39 88.04 18.18 2.649 2.208 95.25 305.77 31.15 39 88.04 -18.18 2.649 2.208 95.25 305.77 31.15 40 95.55 1.06 2.649 2.208 95.58 304.70 31.37 40 43.28 -1.06 1.000 1.000 43.33 312.34 13.87 48 49.47 1.06 1.000 1.000 49.51 312.23 15.86 48 131.05 -1.06 2.649 2.208 131.07 300.96 43.55 49 143.39 0.63 2.649 2.208 143.39 301.21 47.61 49 143.39 -0.63 2.649 2.208 143.39 301.21 47.61 50 118.67 -0.16 2.649 2.208 118.67 309.44 38.35 50 44.81 0.16 1.000 1.000 44.81 315.13 14.22 60 16.78 -0.16 1.000 1.000 16.78 301.88 5.56 60 16.78 0.16 1.000 1.000 16.78 301.88 5.56 70 4.19 -0.16 1.000 1.000 4.20 296.27 1.42 70 4.19 0.16 1.000 1.000 4.20 296.27 1.42 80 3.57 -0.16 1.000 1.000 3.59 306.23 1.17 80 0.00 0.00 0.000 0.000 0.00 0.00 0.00 90 0.00 0.00 0.000 0.000 0.00 0.00 0.00 90 3.50 0.16 1.000 1.000 3.51 306.24 1.15 100 2.91 -0.16 1.000 1.000 2.93 296.12 0.99 100 2.91 0.16 1.000 1.000 2.93 296.12 0.99 110 12.44 -0.16 1.000 1.000 12.45 302.36 4.12 110 12.44 0.16 1.000 1.000 12.45 302.36 4.12 120 47.26 -0.16 1.000 1.000 47.26 281.22 16.81 120 47.26 0.16 1.000 1.000 47.26 281.22 16.81 128 47.35 -0.16 1.000 1.000 47.35 308.21 15.36 128 125.42 0.16 2.649 2.208 125.42 291.10 43.09 129 114.14 -0.64 2.649 2.208 114.15 284.03 40.19 129 114.14 0.64 2.649 2.208 114.15 284.03 40.19 130 86.93 -0.75 2.649 2.208 86.95 284.26 30.59 130 32.81 0.75 1.000 1.000 32.85 305.86 10.74 138 59.93 -0.75 1.000 1.000 59.95 318.49 18.82 138 158.78 0.75 2.649 2.208 158.79 318.38 49.87 139 185.98 -0.66 2.649 2.208 185.99 315.92 58.87 139 185.98 0.66 2.649 2.208 185.99 315.92 58.87 140 197.25 -0.18 2.649 2.208 197.25 316.82 62.26 140 74.46 0.18 1.000 1.000 74.46 317.91 23.42 148 74.38 -0.18 1.000 1.000 74.38 317.90 23.40 148 197.04 0.18 2.649 2.208 197.04 316.79 62.20 149 185.75 0.38 2.649 2.208 185.75 315.88 58.80 149 185.75 -0.38 2.649 2.208 185.75 315.88 58.80 150 158.51 0.73 2.649 2.208 158.52 318.34 49.79 150 59.83 -0.73 1.000 1.000 59.85 318.47 18.79 158 32.92 0.73 1.000 1.000 32.95 305.88 10.77 158 87.20 -0.73 2.649 2.208 87.22 284.30 30.68 159 114.45 0.40 2.649 2.208 114.45 284.07 40.29 159 114.45 -0.40 2.649 2.208 114.45 284.07 40.29 160 125.75 -0.16 2.649 2.208 125.75 291.15 43.19 160 47.47 0.16 1.000 1.000 47.47 308.23 15.40 170 47.56 -0.16 1.000 1.000 47.56 281.17 16.92 170 47.56 0.16 1.000 1.000 47.56 281.17 16.92 180 13.57 -0.16 1.000 1.000 13.58 302.54 4.49 180 13.57 0.16 1.000 1.000 13.58 302.54 4.49 190 6.82 -0.16 1.000 1.000 6.83 295.45 2.31 190 6.82 0.16 1.000 1.000 6.83 295.45 2.31 200 13.52 -0.16 1.000 1.000 13.53 302.53 4.47 200 13.52 0.16 1.000 1.000 13.53 302.53 4.47 210 47.44 -0.16 1.000 1.000 47.44 281.19 16.87 210 47.44 0.16 1.000 1.000 47.44 281.19 16.87 218 47.44 -0.16 1.000 1.000 47.44 308.23 15.39 218 125.67 0.16 2.649 2.208 125.68 291.14 43.17 219 114.40 -0.40 2.649 2.208 114.40 284.07 40.27 219 114.40 0.40 2.649 2.208 114.40 284.07 40.27 220 87.19 -0.40 2.649 2.208 87.19 284.30 30.67 220 32.91 0.40 1.000 1.000 32.92 305.88 10.76 228 59.84 -0.40 1.000 1.000 59.84 318.47 18.79 228 158.53 0.40 2.649 2.208 158.53 318.34 49.80 229 185.73 -0.41 2.649 2.208 185.73 315.90 58.80 229 185.73 0.41 2.649 2.208 185.73 315.90 58.80 230 197.01 -0.18 2.649 2.208 197.01 316.83 62.18 230 74.36 0.18 1.000 1.000 74.36 317.92 23.39 238 74.36 -0.18 1.000 1.000 74.36 317.92 23.39 238 197.01 0.18 2.649 2.208 197.01 316.84 62.18 239 185.74 0.14 2.649 2.208 185.74 315.89 58.80 239 185.74 -0.14 2.649 2.208 185.74 315.89 58.80 240 158.53 0.38 2.649 2.208 158.53 318.34 49.80 240 59.84 -0.38 1.000 1.000 59.84 318.47 18.79 248 32.91 0.38 1.000 1.000 32.92 305.88 10.76 248 87.19 -0.38 2.649 2.208 87.19 284.30 30.67 249 114.40 0.15 2.649 2.208 114.40 284.07 40.27 249 114.40 -0.15 2.649 2.208 114.40 284.07 40.27 250 125.67 -0.16 2.649 2.208 125.67 291.14 43.17 250 47.44 0.16 1.000 1.000 47.44 308.23 15.39 260 47.44 -0.16 1.000 1.000 47.44 281.19 16.87 260 47.44 0.16 1.000 1.000 47.44 281.19 16.87 270 13.50 -0.16 1.000 1.000 13.50 302.53 4.46 270 13.50 0.16 1.000 1.000 13.50 302.53 4.46 280 6.73 -0.16 1.000 1.000 6.74 295.46 2.28 280 6.73 0.16 1.000 1.000 6.74 295.46 2.28 290 13.49 -0.16 1.000 1.000 13.49 302.54 4.46 290 13.49 0.16 1.000 1.000 13.49 302.54 4.46 300 47.43 -0.16 1.000 1.000 47.43 281.19 16.87 300 47.43 0.16 1.000 1.000 47.43 281.19 16.87 308 47.43 -0.16 1.000 1.000 47.43 308.23 15.39 308 125.66 0.16 2.649 2.208 125.66 291.14 43.16 309 114.39 -0.15 2.649 2.208 114.39 284.07 40.27 309 114.39 0.15 2.649 2.208 114.39 284.07 40.27 310 87.19 -0.06 2.649 2.208 87.19 284.30 30.67 310 32.91 0.06 1.000 1.000 32.91 305.88 10.76 318 59.84 -0.06 1.000 1.000 59.84 318.47 18.79 318 158.53 0.06 2.649 2.208 158.53 318.34 49.80 319 185.73 -0.17 2.649 2.208 185.73 315.90 58.79 319 185.73 0.17 2.649 2.208 185.73 315.90 58.79 320 197.00 -0.18 2.649 2.208 197.00 316.85 62.17 320 74.36 0.18 1.000 1.000 74.36 317.93 23.39 328 74.36 -0.18 1.000 1.000 74.36 317.93 23.39 328 197.00 0.18 2.649 2.208 197.00 316.85 62.17 329 185.73 -0.11 2.649 2.208 185.73 315.90 58.79 329 185.73 0.11 2.649 2.208 185.73 315.90 58.79 330 158.53 0.03 2.649 2.208 158.53 318.34 49.80 330 59.84 -0.03 1.000 1.000 59.84 318.47 18.79 338 32.91 0.03 1.000 1.000 32.91 305.88 10.76 338 87.19 -0.03 2.649 2.208 87.19 284.30 30.67 339 114.39 -0.09 2.649 2.208 114.39 284.07 40.27 339 114.39 0.09 2.649 2.208 114.39 284.07 40.27 340 125.66 -0.16 2.649 2.208 125.66 291.14 43.16 340 47.43 0.16 1.000 1.000 47.43 308.23 15.39 350 47.43 -0.16 1.000 1.000 47.43 281.19 16.87 350 47.43 0.16 1.000 1.000 47.43 281.19 16.87 360 13.49 -0.16 1.000 1.000 13.49 302.53 4.46 360 13.49 0.16 1.000 1.000 13.49 302.53 4.46 370 6.73 -0.16 1.000 1.000 6.74 295.46 2.28 370 6.73 0.16 1.000 1.000 6.74 295.46 2.28 380 13.51 -0.16 1.000 1.000 13.52 302.50 4.47 380 13.51 0.16 1.000 1.000 13.52 302.50 4.47 390 47.52 -0.16 1.000 1.000 47.52 281.30 16.89 390 47.52 0.16 1.000 1.000 47.52 281.30 16.89 398 47.45 -0.16 1.000 1.000 47.45 308.21 15.40 398 125.71 0.16 2.649 2.208 125.71 291.09 43.18 399 114.42 0.09 2.649 2.208 114.42 284.04 40.28 399 114.42 -0.09 2.649 2.208 114.42 284.04 40.28 400 87.20 0.29 2.649 2.208 87.20 284.28 30.67 400 32.91 -0.29 1.000 1.000 32.92 305.87 10.76 408 59.83 0.29 1.000 1.000 59.83 318.48 18.79 408 158.51 -0.29 2.649 2.208 158.51 318.36 49.79 409 185.73 0.08 2.649 2.208 185.73 315.90 58.79 409 185.73 -0.08 2.649 2.208 185.73 315.90 58.79 410 197.02 -0.18 2.649 2.208 197.02 316.83 62.18 410 74.37 0.18 1.000 1.000 74.37 317.92 23.39 418 74.43 -0.18 1.000 1.000 74.43 317.84 23.42 418 197.18 0.18 2.649 2.208 197.18 316.61 62.28 419 185.92 -0.35 2.649 2.208 185.92 315.65 58.90 419 185.92 0.35 2.649 2.208 185.92 315.65 58.90 420 158.72 -0.31 2.649 2.208 158.73 318.09 49.90 420 59.91 0.31 1.000 1.000 59.91 318.38 18.82 428 32.83 -0.31 1.000 1.000 32.84 305.98 10.73 428 86.99 0.31 2.649 2.208 86.99 284.56 30.57 429 114.19 -0.34 2.649 2.208 114.19 284.34 40.16 429 114.19 0.34 2.649 2.208 114.19 284.34 40.16 430 125.45 -0.16 2.649 2.208 125.45 291.44 43.04 430 47.35 0.16 1.000 1.000 47.35 308.34 15.36 440 47.28 -0.16 1.000 1.000 47.28 280.99 16.83 440 47.28 0.16 1.000 1.000 47.28 280.99 16.83 450 12.61 -0.16 1.000 1.000 12.61 303.73 4.15 450 12.61 0.16 1.000 1.000 12.61 303.73 4.15 460 3.38 -0.16 1.000 1.000 3.39 290.85 1.17 460 3.38 0.16 1.000 1.000 3.39 290.85 1.17 470 1.97 -0.16 1.000 1.000 2.00 284.41 0.70 ============ The above is the data before cooling. Piping Code: B31.3 -2004, April 29, 2005 CODE STRESS CHECK PASSED : LOADCASE 3 (EXP) L3=L1-L2 Highest Stresses: (N./sq.mm. ) CodeStress Ratio: 95.9 @Node 140 Code Stress: 197.1 Allowable: 205.5 A * al Stress: 3.7 @Node 49 Bending Stress: 197.1 @Node 140 Torsion Stress: 29.1 @Node 20 Hoop Stress: 0.0 @Node 20 3D Max Intensity: 345.7 @Node 140 NODE Bending Torsion SIF In SIF Out Code Allowable Ratio Stress Stress Plane Plane Stress Stress % N./sq.mm. N./sq.mm. N./sq.mm. N./sq.mm. 10 132.92 -29.06 1.000 1.000 145.07 217.63 66.66 20 83.11 29.06 1.000 1.000 101.42 256.92 39.47 20 0.00 0.00 0.000 0.000 0.00 0.00 0.00 30 0.00 0.00 0.000 0.000 0.00 0.00 0.00 30 48.25 -29.06 1.000 1.000 75.54 283.49 26.65 38 22.23 29.06 1.000 1.000 62.23 302.78 20.55 38 56.02 -29.06 2.649 2.208 80.72 281.17 28.71 39 88.48 18.29 2.649 2.208 95.75 218.45 43.83 39 88.48 -18.29 2.649 2.208 95.75 218.45 43.83 40 96.28 1.06 2.649 2.208 96.30 205.50 46.86 40 43.61 -1.06 1.000 1.000 43.66 265.55 16.44 48 49.09 1.06 1.000 1.000 49.13 278.16 17.66 48 130.05 -1.06 2.649 2.208 130.07 213.95 60.79 49 142.69 0.64 2.649 2.208 142.70 205.50 69.44 49 142.69 -0.64 2.649 2.208 142.70 205.50 69.44 50 118.76 -0.16 2.649 2.208 118.76 205.50 57.79 50 44.84 0.16 1.000 1.000 44.84 269.68 16.63 60 15.41 -0.16 1.000 1.000 15.42 288.61 5.34 60 15.41 0.16 1.000 1.000 15.42 288.61 5.34 70 3.74 -0.16 1.000 1.000 3.75 297.55 1.26 70 3.74 0.16 1.000 1.000 3.75 297.55 1.26 80 3.39 -0.16 1.000 1.000 3.41 303.50 1.12 80 0.00 0.00 0.000 0.000 0.00 0.00 0.00 90 0.00 0.00 0.000 0.000 0.00 0.00 0.00 90 3.35 0.16 1.000 1.000 3.37 304.00 1.11 100 3.01 -0.16 1.000 1.000 3.03 288.89 1.05 100 3.01 0.16 1.000 1.000 3.03 288.89 1.05 110 12.47 -0.16 1.000 1.000 12.47 313.34 3.98 110 12.47 0.16 1.000 1.000 12.47 313.34 3.98 120 47.24 -0.16 1.000 1.000 47.24 225.93 20.91 120 47.24 0.16 1.000 1.000 47.24 225.93 20.91 128 47.33 -0.16 1.000 1.000 47.33 273.60 17.30 128 125.36 0.16 2.649 2.208 125.36 205.50 61.00 129 114.09 -0.64 2.649 2.208 114.10 225.00 50.71 129 114.09 0.64 2.649 2.208 114.10 225.00 50.71 130 86.89 -0.75 2.649 2.208 86.91 256.79 33.84 130 32.80 0.75 1.000 1.000 32.83 295.49 11.11 138 59.90 -0.75 1.000 1.000 59.92 251.96 23.78 138 158.69 0.75 2.649 2.208 158.69 205.50 77.22 139 185.88 -0.66 2.649 2.208 185.88 205.50 90.45 139 185.88 0.66 2.649 2.208 185.88 205.50 90.45 140 197.14 -0.18 2.649 2.208 197.14 205.50 95.93 140 74.41 0.18 1.000 1.000 74.42 233.79 31.83 148 74.34 -0.18 1.000 1.000 74.34 233.85 31.79 148 196.94 0.18 2.649 2.208 196.94 205.50 95.83 149 185.65 0.39 2.649 2.208 185.65 205.50 90.34 149 185.65 -0.39 2.649 2.208 185.65 205.50 90.34 150 158.42 0.73 2.649 2.208 158.43 205.50 77.10 150 59.80 -0.73 1.000 1.000 59.82 252.04 23.73 158 32.90 0.73 1.000 1.000 32.93 295.41 11.15 158 87.16 -0.73 2.649 2.208 87.17 256.58 33.97 159 114.39 0.40 2.649 2.208 114.39 224.76 50.90 159 114.39 -0.40 2.649 2.208 114.39 224.76 50.90 160 125.68 -0.16 2.649 2.208 125.68 205.50 61.16 160 47.45 0.16 1.000 1.000 47.45 273.50 17.35 170 47.53 -0.16 1.000 1.000 47.53 225.69 21.06 170 47.53 0.16 1.000 1.000 47.53 225.69 21.06 180 13.57 -0.16 1.000 1.000 13.57 314.31 4.32 180 13.57 0.16 1.000 1.000 13.57 314.31 4.32 190 6.82 -0.16 1.000 1.000 6.82 285.34 2.39 190 6.82 0.16 1.000 1.000 6.82 285.34 2.39 200 13.52 -0.16 1.000 1.000 13.52 314.52 4.30 200 13.52 0.16 1.000 1.000 13.52 314.52 4.30 210 47.42 -0.16 1.000 1.000 47.43 225.72 21.01 210 47.42 0.16 1.000 1.000 47.43 225.72 21.01 218 47.41 -0.16 1.000 1.000 47.42 273.52 17.34 218 125.61 0.16 2.649 2.208 125.61 205.50 61.13 219 114.34 -0.40 2.649 2.208 114.34 224.80 50.86 219 114.34 0.40 2.649 2.208 114.34 224.80 50.86 220 87.14 -0.40 2.649 2.208 87.15 256.58 33.96 220 32.89 0.40 1.000 1.000 32.90 295.42 11.14 228 59.80 -0.40 1.000 1.000 59.81 252.04 23.73 228 158.44 0.40 2.649 2.208 158.44 205.50 77.10 229 185.63 -0.41 2.649 2.208 185.63 205.50 90.33 229 185.63 0.41 2.649 2.208 185.63 205.50 90.33 230 196.91 -0.18 2.649 2.208 196.91 205.50 95.82 230 74.32 0.18 1.000 1.000 74.32 233.86 31.78 238 74.33 -0.18 1.000 1.000 74.33 233.81 31.79 238 196.93 0.18 2.649 2.208 196.93 205.50 95.83 239 185.67 0.14 2.649 2.208 185.67 205.50 90.35 239 185.67 -0.14 2.649 2.208 185.67 205.50 90.35 240 158.47 0.38 2.649 2.208 158.47 205.50 77.11 240 59.81 -0.38 1.000 1.000 59.82 251.97 23.74 248 32.88 0.38 1.000 1.000 32.89 295.48 11.13 248 87.11 -0.38 2.649 2.208 87.12 256.75 33.93 249 114.32 0.16 2.649 2.208 114.32 224.97 50.81 249 114.32 -0.16 2.649 2.208 114.32 224.97 50.81 250 125.58 -0.16 2.649 2.208 125.58 205.50 61.11 250 47.40 0.16 1.000 1.000 47.40 273.60 17.32 260 47.39 -0.16 1.000 1.000 47.39 225.91 20.98 260 47.39 0.16 1.000 1.000 47.39 225.91 20.98 270 13.37 -0.16 1.000 1.000 13.37 314.10 4.26 270 13.37 0.16 1.000 1.000 13.37 314.10 4.26 276 3.74 -0.16 1.000 1.000 3.75 298.95 1.25 276 0.00 0.00 0.000 0.000 0.00 0.00 0.00 278 0.00 0.00 0.000 0.000 0.00 0.00 0.00 278 3.10 0.16 1.000 1.000 3.12 299.89 1.04 280 6.61 -0.16 1.000 1.000 6.62 284.96 2.32 280 6.61 0.16 1.000 1.000 6.62 284.96 2.32 290 13.45 -0.16 1.000 1.000 13.45 314.99 4.27 290 13.45 0.16 1.000 1.000 13.45 314.99 4.27 300 47.40 -0.16 1.000 1.000 47.40 225.77 21.00 300 47.40 0.16 1.000 1.000 47.40 225.77 21.00 308 47.40 -0.16 1.000 1.000 47.40 273.53 17.33 308 125.59 0.16 2.649 2.208 125.59 205.50 61.11 309 114.32 -0.15 2.649 2.208 114.32 224.79 50.86 309 114.32 0.15 2.649 2.208 114.32 224.79 50.86 310 87.13 -0.06 2.649 2.208 87.13 256.57 33.96 310 32.89 0.06 1.000 1.000 32.89 295.41 11.13 318 59.81 -0.06 1.000 1.000 59.81 252.04 23.73 318 158.45 0.06 2.649 2.208 158.45 205.50 77.10 319 185.64 -0.17 2.649 2.208 185.64 205.50 90.34 319 185.64 0.17 2.649 2.208 185.64 205.50 90.34 320 196.90 -0.18 2.649 2.208 196.90 205.50 95.82 320 74.32 0.18 1.000 1.000 74.32 233.88 31.78 328 74.32 -0.18 1.000 1.000 74.32 233.87 31.78 328 196.90 0.18 2.649 2.208 196.90 205.50 95.81 329 185.63 -0.10 2.649 2.208 185.63 205.50 90.33 329 185.63 0.10 2.649 2.208 185.63 205.50 90.33 330 158.44 0.03 2.649 2.208 158.44 205.50 77.10 330 59.80 -0.03 1.000 1.000 59.80 252.04 23.73 338 32.89 0.03 1.000 1.000 32.89 295.42 11.13 338 87.14 -0.03 2.649 2.208 87.14 256.59 33.96 339 114.33 -0.09 2.649 2.208 114.33 224.82 50.86 339 114.33 0.09 2.649 2.208 114.33 224.82 50.86 340 125.60 -0.16 2.649 2.208 125.60 205.50 61.12 340 47.41 0.16 1.000 1.000 47.41 273.54 17.33 350 47.41 -0.16 1.000 1.000 47.41 225.80 21.00 350 47.41 0.16 1.000 1.000 47.41 225.80 21.00 360 13.48 -0.16 1.000 1.000 13.48 314.92 4.28 360 13.48 0.16 1.000 1.000 13.48 314.92 4.28 370 6.72 -0.16 1.000 1.000 6.73 285.37 2.36 370 6.72 0.16 1.000 1.000 6.73 285.37 2.36 380 13.51 -0.16 1.000 1.000 13.51 314.85 4.29 380 13.51 0.16 1.000 1.000 13.51 314.85 4.29 390 47.49 -0.16 1.000 1.000 47.49 225.81 21.03 390 47.49 0.16 1.000 1.000 47.49 225.81 21.03 398 47.42 -0.16 1.000 1.000 47.42 273.54 17.34 398 125.64 0.16 2.649 2.208 125.64 205.50 61.14 399 114.36 0.09 2.649 2.208 114.36 224.82 50.87 399 114.36 -0.09 2.649 2.208 114.36 224.82 50.87 400 87.15 0.29 2.649 2.208 87.16 256.59 33.97 400 32.90 -0.29 1.000 1.000 32.90 295.42 11.14 408 59.80 0.29 1.000 1.000 59.80 252.03 23.73 408 158.43 -0.29 2.649 2.208 158.43 205.50 77.09 409 185.63 0.08 2.649 2.208 185.63 205.50 90.33 409 185.63 -0.08 2.649 2.208 185.63 205.50 90.33 410 196.91 -0.18 2.649 2.208 196.91 205.50 95.82 410 74.33 0.18 1.000 1.000 74.33 233.87 31.78 418 74.39 -0.18 1.000 1.000 74.39 233.88 31.81 418 197.07 0.18 2.649 2.208 197.07 205.50 95.90 419 185.82 -0.35 2.649 2.208 185.82 205.50 90.43 419 185.82 0.35 2.649 2.208 185.82 205.50 90.43 420 158.64 -0.31 2.649 2.208 158.64 205.50 77.20 420 59.88 0.31 1.000 1.000 59.88 252.05 23.76 428 32.82 -0.31 1.000 1.000 32.82 295.40 11.11 428 86.94 0.31 2.649 2.208 86.94 256.55 33.89 429 114.13 -0.33 2.649 2.208 114.13 224.77 50.77 429 114.13 0.33 2.649 2.208 114.13 224.77 50.77 430 125.38 -0.16 2.649 2.208 125.38 205.50 61.01 430 47.33 0.16 1.000 1.000 47.33 273.52 17.30 440 47.26 -0.16 1.000 1.000 47.26 225.75 20.93 440 47.26 0.16 1.000 1.000 47.26 225.75 20.93 450 12.60 -0.16 1.000 1.000 12.60 314.79 4.00 450 12.60 0.16 1.000 1.000 12.60 314.79 4.00 460 3.38 -0.16 1.000 1.000 3.39 284.62 1.19 460 3.38 0.16 1.000 1.000 3.39 284.62 1.19 470 1.97 -0.16 1.000 1.000 1.99 283.58 0.70 ============ The above is if the cold tightening is tightened by 200mm in the middle
Check to see if there is a problem with the input temperature?
There are no other changes except the increase in cold tightness.
Because the secondary allowable stress is only related to Sc, Sh, and Sl, f is basically unchanged at Node 140 before and after cold tightening. It is recommended to check the input data before and after the cold tightening point to see if the input temperature and pressure have changed. This post was last edited by ssmith2007 on 2008-3-14 13:08 ]