Piping rack issues
Thread Content
For 3\" and 4\" two-phase flow pipes running vertically for 20 meters, how far apart should guide frames and load-bearing frames be installed? Also, in the ductwork, at what interval should limit stops be installed?
This is available in all standard reference catalogs
It is necessary to know whether the pipeline is insulated, as well as data such as its operating temperature and design pressure. For high-temperature insulated pipelines, the position and type of supports must be determined through stress calculations. In the case of two-phase flow pipelines, guide supports should be installed in larger numbers to prevent vibrations
You can take a look at the technical specifications for the design of pipe supports and hangers. Spacing of vertical pipe supports: It can generally be rounded off based on the spacing of horizontal pipe supports for pipes filled with water without insulation. Basic spans for uninsulated pipes within the installation: Nominal pipe diameter (mm), outer diameter × wall thickness (mm), calculated pipe weight (kg/m), basic pipe span (m). Design temperature of pipes: ≤200°C and ≤350°C. Gas pipes, liquid pipes.
152: 1.25×2.75, 18×2.5, 18×3; 1.55, 1.18, 1.36, 1.74, 1.31, 1.47, 3.43, 3.15, 3.11, 3.33, 3.07, 3.05, 3.37, 3.09, 3.06, 3.28, 3.01, 3.00
202: 6.75×2.75, 25×2.5, 25×3; 2.04, 1.74, 2.02, 2.38, 2.04, 2.29, 3.89, 3.76, 3.73, 3.74, 3.61, 3.61, 3.82, 3.70, 3.62, 3.67, 3.55, 3.56
253: 3.25×3.25, 32×2.5, 32×3.5; 3.05, 2.32, 3.07, 3.60, 2.87, 3.54, 4.36, 4.28, 4.24, 4.18, 4.06, 4.09, 4.28, 4.21, 4.17, 4.11, 3.99, 4.02
324: 2.25×3.25, 38×2.5, 38×3.5; 3.99, 2.83, 3.75, 4.95, 3.65, 4.48, 4.92, 4.68, 4.65, 4.66, 4.39, 4.45, 4.84, 4.60, 4.57, 4.58, 4.31, 4.37
404: 8×3.5, 45×3, 45×3.5; 4.93, 4.02, 4.57, 6.19, 5.16, 4.66, 5.25, 5.09, 5.08, 4.96, 4.78, 4.81, 5.16, 5.00, 4.99, 4.87, 4.70, 4.73
506: 60×3.5, 57×3.5, 57×4; 6.38, 6.01, 6.73, 8.50, 7.90, 8.54, 5.89, 5.74, 5.73, 5.48, 5.36, 5.40, 5.78, 5.63, 5.63, 5.38, 5.26, 5.30
707: 5.5×3.75, 76×4, 76×6; 8.83, 9.39, 13.20, 12.32, 12.88, 16.29, 6.60, 6.63, 6.60, 6.08, 6.12, 6.26, 6.49, 6.51, 6.48, 5.97, 6.02, 6.15
808: 8.5×4, 89×4, 89×6; 11.22, 11.01, 15.85, 16.11, 16.24, 20.32, 7.14, 7.16, 6.53, 6.54, 6.73, 7.02, 7.04, 7.04, 6.41, 6.43, 6.61
100: 14×4, 108×4, 108×6; 15.14, 14.19, 19.85, 23.60, 21.73, 26.79, 8.06, 7.87, 7.90, 7.23, 7.08, 7.33, 7.93, 7.73, 7.76, 7.10, 6.95, 7.20
125: 40×4.5, 133×4, 133×6; 21.28, 18.21, 25.31, 34.21, 29.99, 36.34, 8.93, 8.69, 8.76, 7.93, 7.67, 8.00, 8.78, 8.54, 8.60, 7.80, 7.54, 7.86
150: 65×4.5, 159×4.5, 159×6; 25.92, 24.81, 31.24, 44.30, 41.77, 47.52, 9.65, 9.48, 9.56, 8.44, 8.33, 8.60, 9.48, 9.32, 9.39, 8.29, 8.18, 8.45
This post was last edited by lbp on April 14, 2009, at 21:56
152: 1.25×2.75, 18×2.5, 18×3; 1.55, 1.18, 1.36, 1.74, 1.31, 1.47, 3.43, 3.15, 3.11, 3.33, 3.07, 3.05, 3.37, 3.09, 3.06, 3.28, 3.01, 3.00
202: 6.75×2.75, 25×2.5, 25×3; 2.04, 1.74, 2.02, 2.38, 2.04, 2.29, 3.89, 3.76, 3.73, 3.74, 3.61, 3.61, 3.82, 3.70, 3.62, 3.67, 3.55, 3.56
253: 3.25×3.25, 32×2.5, 32×3.5; 3.05, 2.32, 3.07, 3.60, 2.87, 3.54, 4.36, 4.28, 4.24, 4.18, 4.06, 4.09, 4.28, 4.21, 4.17, 4.11, 3.99, 4.02
324: 2.25×3.25, 38×2.5, 38×3.5; 3.99, 2.83, 3.75, 4.95, 3.65, 4.48, 4.92, 4.68, 4.65, 4.66, 4.39, 4.45, 4.84, 4.60, 4.57, 4.58, 4.31, 4.37
404: 8×3.5, 45×3, 45×3.5; 4.93, 4.02, 4.57, 6.19, 5.16, 4.66, 5.25, 5.09, 5.08, 4.96, 4.78, 4.81, 5.16, 5.00, 4.99, 4.87, 4.70, 4.73
506: 60×3.5, 57×3.5, 57×4; 6.38, 6.01, 6.73, 8.50, 7.90, 8.54, 5.89, 5.74, 5.73, 5.48, 5.36, 5.40, 5.78, 5.63, 5.63, 5.38, 5.26, 5.30
707: 5.5×3.75, 76×4, 76×6; 8.83, 9.39, 13.20, 12.32, 12.88, 16.29, 6.60, 6.63, 6.60, 6.08, 6.12, 6.26, 6.49, 6.51, 6.48, 5.97, 6.02, 6.15
808: 8.5×4, 89×4, 89×6; 11.22, 11.01, 15.85, 16.11, 16.24, 20.32, 7.14, 7.16, 6.53, 6.54, 6.73, 7.02, 7.04, 7.04, 6.41, 6.43, 6.61
100: 14×4, 108×4, 108×6; 15.14, 14.19, 19.85, 23.60, 21.73, 26.79, 8.06, 7.87, 7.90, 7.23, 7.08, 7.33, 7.93, 7.73, 7.76, 7.10, 6.95, 7.20
125: 40×4.5, 133×4, 133×6; 21.28, 18.21, 25.31, 34.21, 29.99, 36.34, 8.93, 8.69, 8.76, 7.93, 7.67, 8.00, 8.78, 8.54, 8.60, 7.80, 7.54, 7.86
150: 65×4.5, 159×4.5, 159×6; 25.92, 24.81, 31.24, 44.30, 41.77, 47.52, 9.65, 9.48, 9.56, 8.44, 8.33, 8.60, 9.48, 9.32, 9.39, 8.29, 8.18, 8.45
This post was last edited by lbp on April 14, 2009, at 21:56
Your question lacks information on the temperature conditions and pipe material (steel, plastic). 1. If the medium temperature is above 150 degrees, stress calculations must be performed based on the conditions of the connected pipes in order to obtain accurate results. 2. In the case of a two-phase pipeline at room temperature, with a vertical pipe length of 20 meters, a load-bearing support is required at the upper part of the pipe. To prevent vibration in the piping system, the spacing between the guiding supports along the vertical pipe should be smaller than that for liquid-phase pipelines of the same diameter. The specification does not specify exactly by how much; using a coefficient of 0.5–0.7 should be sufficient to ensure safety. The spacing of the limit supports in the pipe gallery can be such that one limit support is installed every 2 spans; if it are heat pipes, stress calculations are required before determining the location of the limit supports.
Stress calculations should be performed to determine the type of support.
Agree with the person above; pipes carrying two-phase flow media will experience vibration! So let’s calculate the stress; once the calculation is done, the stress report will indicate the location and shape of the pipe rack!