<![CDATA[Yusufi | Eko Sujarwo]]> http://jarwoeko.webs.com/blog.htm Freewebs <![CDATA[Eko Sujarwo | Document]]> http://jarwoeko.webs.com/blog.htm?blogentryid=4493829 20090114, Pers Release terhadap Sikap KPU.doc
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]]> http://jarwoeko.webs.com/blog.htm?blogentryid=4493829#topBox http://jarwoeko.webs.com/blog.htm?blogentryid=4493829 Thu, 16 Apr 2009 06:18:00 -0100 <![CDATA[Rancang Bangun Alat Uji Kemampuan Gasket | Gaskets Perform Test Tool]]> http://jarwoeko.webs.com/blog.htm?blogentryid=3893120
 
Since 2003 until 2005, I was build one of tool to the gaket performa, in the piping system. what is the fungtion of this tool, this tool can give as some informations a bout ; fluid presure drops in pipe lines, heat loss and insulation of pipe lines, and temperature ekspansion of pipe lines or gasket too. but this tool test not yet to perfect, we must being research and ekspansions again to the forget most Gasket Dimension.
3D Tool Desaign with Solid Edge Program
 
 

Fluid presure drops in pipe lines

Weight density of air (in pounds per cubic foot) for different gauge pressure (psi) can be found in the table below:

Density of air 1) (lb/ft3)
Air temperature (oF) Gauge Pressure (psi)
0 5 10 20 30 40 50 60 70 80 90 100
30 0.081 0.109 0.136 0.192 0.247 0.302 0.357 0.412 0.467 0.522 0.578 0.633
40 0.080 0.107 0.134 0.188 0.242 0.295 0.350 0.404 0.458 0.512 0.566 0.620
50 0.078 0.105 0.131 0.185 0.238 0.291 0.344 0.397 0.451 0.504 0.557 0.610
60 0.076 0.102 0.128 0.180 0.232 0.284 0.336 0.388 0.440 0.492 0.544 0.596
70 0.075 0.101 0.126 0.177 0.228 0.279 0.330 0.381 0.432 0.483 0.534 0.585
80 0.074 0.099 0.124 0.174 0.224 0.274 0.324 0.374 0.424 0.474 0.524 0.574
90 0.072 0.097 0.121 0.171 0.220 0.269 0.318 0.367 0.416 0.465 0.515 0.564
100 0.071 0.095 0.119 0.168 0.216 0.264 0.312 0.361 0.409 0.457 0.505 0.554
120 0.069 0.092 0.115 0.162 0.208 0.255 0.302 0.348 0.395 0.441 0.488 0.535
140 0.066 0.089 0.111 0.156 0.201 0.246 0.291 0.337 0.382 0.427 0.472 0.517
150 0.065 0.087 0.109 0.154 0.198 0.242 0.287 0.331 0.375 0.420 0.464 0.508
200 0.060 0.081 0.101 0.142 0.183 0.244 0.265 0.306 0.347 0.388 0.429 0.470
250 0.056 0.075 0.094 0.132 0.170 0.208 0.246 0.284 0.322 0.361 0.399 0.437
300 0.052 0.070 0.088 0.123 0.159 0.195 0.230 0.266 0.301 0.337 0.372 0.408
400 0.046 0.062 0.078 0.109 0.141 0.172 0.203 0.235 0.266 0.298 0.329 0.360
500 0.041 0.056 0.070 0.098 0.126 0.154 0.182 0.210 0.238 0.267 0.295 0.323
600 0.038 0.050 0.063 0.089 0.114 0.140 0.165 0.190 0.216 0.241 0.267 0.292
Density of air 1) (lb/ft3)
Air temperature (oF) Gauge Pressure (psi)
120 140 150 200 250 300 400 500 700 800 900 1000
30 0.743 0.853 0.909 1.185 1.460 1.736 2.29 1.84 3.94 4.49 5.05 5.60
40 0.728 0.836 0.890 1.161 1.431 1.702 2.24 2.78 3.86 4.40 4.95 5.49
50 0.717 0.823 0.876 1.142 1.408 1.674 2.21 2.74 3.80 4.33 4.87 5.40
60 0.700 0.804 0.856 1.116 1.376 1.636 2.16 2.68 3.72 4.24 4.76 5.28
70 0.687 0.789 0.840 1.095 1.350 1.605 2.12 2.63 3.65 4.16 4.67 5.18
80 0.674 0.774 0.824 1.075 1.325 1.575 2.08 2.58 3.58 4.08 4.58 5.08
90 0.662 0.760 0.809 1.055 1.301 1.547 2.04 2.53 3.51 4.00 4.50 4.99
100 0.650 0.747 0.795 1.036 1.278 1.519 2.00 2.48 3.45 3.93 4.42 4.90
120 0.628 0.721 0.768 1.001 1.234 1.467 1.933 2.40 3.33 3.80 4.26 4.73
140 0.607 0.697 0.742 0.967 1.193 1.418 1.868 2.32 3.22 3.67 4.12 4.57
150 0.597 0.686 0.730 0.951 1.173 1.395 1.838 2.28 3.17 3.61 4.05 4.50
200 0.552 0.634 0.675 0.879 1.084 1.289 1.698 2.11 2.93 3.34 3.75 4.16
250 0.513 0.589 0.627 0.817 1.088 1.198 1.579 1.959 2.72 3.10 3.48 3.86
300 0.479 0.550 0.586 0.764 0.941 1.119 1.475 1.830 2.54 2.90 3.25 3.61
400 0.423 0.486 0.518 0.675 0.832 0.989 1.303 1.618 2.25 2.56 2.87 3.19
500 0.379 0.436 0.464 0.604 0.745 0.886 1.167 1.449 2.01 2.29 2.58 2.86
600 0.343 0.394 0.420 0.547 0.675 0.802 1.057 1.312 1.822 2.08 2.33 2.59

1) Density is based on atmospheric pressure 14.696 psia and molecular weight of air 28.97

  • Density : 1 lb/ft3 = 16.018 kg/m3
  • Pressure: 1 psi (lb/in2) = 6,894.8 Pa (N/m2)
  • Temperature: T(oC) = 5/9[T(oF) - 32]
  • Unit Converter

Density of air can also be expressed as

ñ = 1.325 pin Hg / TR (1)

where

ñ = density (lb/ft3)

pin Hg = pressure (inches Hg)

TR = absolute temperature (Rankine)

Heat loss and insulation of pipe lines

Heat loss (W/m) diagrams for insulated pipes - ranging 1/2 to 6 inches - insulation thickness 10 - 80 mm - temperature difference 20 - 180 deg C

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The heat loss diagrams below is based on metal pipes with fiber glass insulation with thermal conductivity 0.036 W/mK, outdoor condition with moderate wind 9 m/s. A safety factor of 10% is included.

  • indoor location - reduce values with 10%
  • mineral wool insulation - increase values with 6%
  • rigid cellular polyurethane - reduce values by 30%
  • Heat loss diagram (W/m)

Pipe Heat Loss - Insulation thickness 80 mm

pipe heat loss diagram insulation thickness 80 mm

  • 1 W/m = 0.305 W/ft
  • 1 oC = 1.8 oF

Pipe Heat Loss - Insulation thickness 50 mm

pipe heat loss diagram insulation thickness 50 mm

Pipe Heat Loss - Insulation thickness 40 mm

pipe heat loss diagram insulation thickness 40 mm

Pipe Heat Loss - Insulation thickness 30 mm

pipe heat loss diagram insulation thickness 30 mm

Pipe Heat Loss - Insulation thickness 25 mm

pipe heat loss diagram insulation thickness 25 mm

Pipe Heat Loss - Insulation thickness 20 mm

pipe heat loss diagram insulation thickness 20 mm

Pipe Heat Loss - Insulation thickness 10 mm

pipe heat loss diagram insulation thickness 10 mm

 

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Related Topics

  • Insulation Heat transfer and heat loss from buildings and technical applications - insulation methods and coefficients to reduce energy consumption
  • Heat Loss and Insulation of Pipe Lines Heat loss from pipes, tubes and tanks - with and without insulation - foam, fiberglass, rockwool and more
  • Heat Loss and Insulation of Steam Pipes Steam and condensate pipes - heat loss uninsulated and insulated pipes, insulation thickness and more

Related Documents

Temperature ekspansion of pipe line or gasket.

Pipes expands when heated and contracts when cooled. The expansion of the pipes can be expressed with the expansion formula

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The temperature expansion of pipes depends on the start and final temperature of the pipe and the expansion coefficient of the piping material at the actual temperature. The general expansion formula can be expressed as:

dl = á Lo dt (1)

where

dl = expansion (m, inch)

Lo = length of pipe (m, inch)

dt = temperature difference (oC, oF)

á = linear expansion coefficient (m/moK, inch/inchoF)

Mean expansion coefficient may vary with temperature as:

Mean Expansion Coefficient - á - (inch/inchoF) 10-6
Material Temperature Range (oF)
- 32 32 - 212 32 - 400 32 - 600 32 - 750 32 - 900 32 - 1100 32 - 1300
Alloy Steel
(1% Cr. 1/2% Mo)		 7.7 8.0 8.4 8.8 9.2 9.6 9.8
Mild Steel
(0.1 - 0.2% C)		 7.1 7.8 8.3 8.7 9.0 9.5 9.7
Stainless Steel
(18% Cr. 8% Ni)		 10.8 11.1 11.5 11.8 12.1 12.4 12.6 12.8

Formula (1) can also be used with SI units. The expansion coefficient must be adjusted to oC.

Example - Thermal Expansion of Heated Alloy Steel

100 feet of alloy steel pipe is heated from 32 to 212oF. The expansion coefficient is 8 10-6oF). (inch/inch

The expansion can be expressed as:

dl = (8 10-6 in/inoF)(100 feet) (12 in/ft) (212 - 32 oF)

= 1.728 inch

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Related Topics

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Pipe Flanges and Gasket Dimensions

Gasket dimensions for pipe flanges and flange fittings ASME B16.5 Pipe Flanges and Flange Fittings

 

The ASME B16.5 - 1996 Pipe Flanges and Flange Fittings standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking, testing, and methods of designating openings for pipe flanges and flanged fittings.

The standard includes flanges with rating class designations 150, 300, 400, 600, 900, 1500, and 2500 in sizes NPS 1/2 through NPS 24, with requirements given in both metric and U.S units. The Standard is limited to flanges and flanged fittings made from cast or forged materials, and blind flanges and certain reducing flanges made from cast, forged, or plate materials. Also included in this Standard are requirements and recommendations regarding flange bolting, flange gaskets, and flange joints.

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]]> http://jarwoeko.webs.com/blog.htm?blogentryid=3893120#topBox http://jarwoeko.webs.com/blog.htm?blogentryid=3893120 Wed, 27 Aug 2008 13:25:00 -0100 <![CDATA[CURICULUM VITAE]]> http://jarwoeko.webs.com/blog.htm?blogentryid=3888773 http://jarwoeko.webs.com/blog.htm?blogentryid=3888773#topBox http://jarwoeko.webs.com/blog.htm?blogentryid=3888773 Tue, 26 Aug 2008 14:35:00 -0100