Api 2000 6th Edition Pdf

 
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API 2000 7th edition, m3/h or N.m3/h

  • API 2000 - 2014 in point 3.3.2.2.1 (eq (1)) says. 'The out-breathing volumetric flow rate Vop, expressed in SI units of cubic meters per hour of vapor/gas at the actual pressure and temperature conditions of the tank vapor space, shall be as given by Equation (1)'.
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  • API Standard 2000 - Venting Atmospheric and Low-Pressure Storage Tanks: Nonrefrigerated and Refrigerated Last update: April 28, 2004 2000 5th Edition - April 1998 4.3.3.2 Table 4 2000-I-05/03 Background: I have to calculate the emergency flow requirements for 18 storage tanks per API Std. 2000 in case of fire.
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  • Download & View Atmospheric Storage Tanks Venting Req Api 2000 (6th Ed 2009) as PDF for free.

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API 2000 7th edition, m3/h or N.m3/h

Hi guys
I have a doubt. API 2000 - 2014 in point 3.3.2.2.1 (eq (1)) says.. 'The out-breathing volumetric flow rate Vop , expressed in SI units of cubic meters per hour of vapor/gas
at the actual pressure and temperature conditions of the tank vapor space, shall be as given by Equation (1)'. If the tank has P op = 2,5 [psig] and T air = 289 [K], then I must to convert those [m3/h] (at Pop and Tair) to N.m3/h.. right?
My doubt is based in that all equations or tables of API's rest, are in N.m3/h (including Annex D Basis of sizing equations)... does exist a mistake in the Standar and should be N.m3/h for all? i.e. equations (1) and (2) are in normal conditions (Pn = 101,325 [kPa] Tn = 273 [K]).
Any comment, advice or clarification?
Regards
DM

Api 2000 Seventh Edition

API STD 2000-2009, Calculation for max. flow rates for Normal Inbreathing (Refer Section 4.3.2, 'Calculation of maximum flow rates for normal outbreathing & normal inbreathing)
Inputs Tank Volume, Vtk
1131 m3 3 290 m /h 40 ° 20 °C VP≤Hexane
Pump-Out Rate, Vpe Latitude Avg. Storage Temp. VP range Ins. Thickness, lin Insulation Type Thermal Cond. of Insulation, λ in
Use maximum capacity per sketch below Below 42° <25
0m (Enter 0 if tank uninsulated) Cellular glass --- W/m-K
Selected Thermal Cond. of Insulation, λ in,S
452.16 m
2
2 0m Uninsulated
Insulated surface area, A inp Calculations Inbreathing due to Liquid movement out, V ip
(Enter 0 if tank uninsulated)
290 Nm3/h
of Air
Thermal Inbreathing C-Factor Reduction factor, R i Thermal inbreathing, V IT
4 1.00 548.9 Nm3/h
of Air
Total Normal Inbreathing
3 838.9 Nm /h
of Air
Overfill slot
Top of shell height Design liquid level
Overfill protection level requirement ______ m3 or ______ mm Normal fill level
Net Working Capacity _____ m3
Minimum fill level Min. Operating Volume remaining in the tank m3 ____ or ____ mm Top of bottom plate at shell
Reference Appendix L-6 of API STD 650
Average Thermal Conductivity, W/m-K 0.05 0.04 0.06 0.07 VP≤Hexane VP>Hexane C-factor for various conditions Vapour Pressure (VP)
Latitude
--- W/m-K 2 4 W/m K (Typical value for tanks: 4 W/m2-K)
Inside heat transfer coefficient, h Total surface area, A TTS
Maximum capacity _____ m3
Common Inuslation Materials Cellular glass Mineral Fiber Calcium Silicate Perlite
Hexane or similar
> than Hexane or unknown
Average Storage temperature, °C <25
≥25
<25
≥25
Below 42°
4
6.5
6.5
6.5
Between 42° & 58° Above 58°
3 2.5
5 4
5 4
5 4