Handbook of Heating, Ventilating and Air Conditioning by F. Porges (Auth.)

By F. Porges (Auth.)

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P. 4 m 3 1 lb mol occupies 359 ft Mixtures of gases PV=wRmΤ Rm=^ 1 ^i~*~-^2 W 2 + Ü 3 ^ 3 _ g a s t a n t of mixture c o n s Isotherm Constant temperature PV y=const. log^ P{V2-VX) w Work , done M 0 C v ( _T T2 l ) MCjrz-Tj) Ε energy Changeai internal W+E 0 PlVi loge^J MCp{T2-Tx) Heat absorbed Η T l Ti 2 v S dimensionless dimensionless (°C) (kg) n-1 y-1 Final temp. (kJ) Τ χ, T2= = initial, final, temperature where W-=external work done by gas M==mass Ε =increase of internal energy by gas (kJ) (kJ) Η- =total heat absorbed (N/m 2) Pi* Pf =initial, final, pressure =initial, final, volume (m 3) n ==index of expansion law QV = specific heat capacity at constant volume (kJ/kg K) Cp=specific heat capacity of constant pressure (kJ/kg K) Int.

Of Wrought Pipe in in in 5 6(a) Dia. of Number Diam. Thickness of Flange Bolt θ/ θ/ Cast Cast Steel Bronze, Iron Circle Bolts Bolts or Steel (stamped or in 2* 2* 3^ 4 4 4 1 ron forged) screwed or riveted on with boss or welded on with fillet in in in * ι i i i 1 ί i 1 2 1 2 i 8 3 4 3 4 7 i 1 1 1+i 3* 4 4* i* 1* 2 iH 2| 5* 5* 6* 3* 4* 5 4 4 4 2* 3 3* 3 3* 4 7* 8 5} 6* 7 8 8 8 1 8 τ 4 5 4* 5* 9 11 7* 9} 8 8 2 7 8 6* 12 13} 14| 10} 12} 12 12 12 3 4 16 17 14 15 12 12 2 7 3 2 * 1 4 6 7 8 9 71 8{ 9| 8* Hi 10 10} 12 •13 14 12* 14 15 16 17 18 19} 20} 21} 17* 18* 19* 16 16 16 22} 24 25} 20* 21* 23 16 20 20 18 *19 20 19 20 21 26* 27} 29 24 25* 26* 20 20 24 21 *22 *23 24 22 23 24 25 30 31 32* 33* 27* 28* 29* 30* 24 24 24 24 15 16 *17 6(b) 2 1 8 1 i i 8 8 2 8 2 8 3 4 1 I 7 Τ 7 8 7 8 1 1 1 8 1 8 1 1 11 Η 11 1 8 1 1 1 4 x 1 1 4 3 4 1 1 1 8 1 8 2 8 3 4 3 4 7 8 7 8 7 8 Η 1 Η Η 1* 1* ι* ι* 1} Η ι* Η ü ü Η Η 1* ι* ι* ι* 1* 1* 2 Η 2 2* 2* 2* Η 1* 1* * The Institution recommends that the use of these sizes be avoided.

Bolt holes to be drilled off centre lines. 5 bar Thickness of flange depends on type and material Nominal pipe size Outside diameter of pipe mm Diameter of flange mm Diameter of bolt circle mm No. 5 bar for sizes up to 600 NB Standards for materials 35 Metric pipe flanges to BS 4504 Nominal pressure — 10 bar Thickness of flange depends on type and material Nominal pipe size Outside diameter of pipe mm Diameter of flange mm Diameter of bolt circle mm No. 6 780 725 20 M27 36 Standards for materials Metric pipe flanges to BS 4504 Nominal pressure — 16 bar Thickness of flange depends on type and material Nominal pipe size Outside diameter of pipe mm Diameter of flange mm Diameter of bolt circle mm No.

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