Equation in edition 13 for estimating the (Required Minimum Level of Liquid to be maintained Inside Tank) written as;
(Gin x Hin) + Wbott / (p x R2)3 Gout × Hout =
noting that Hin in above equation is defined as (Height or Depth of Liquid Inside Tank).
Coming To;
Same Equation in edition 11...
Dear HTURKAK;
In simple way the answer,
IF Pi exceed weights of tank, then F.8 (mechanical-anchored) applied which ensured stability of the tank (CANNOT FLY LIKE A BALLON).
Mohd Yaseen
Dear HTURKAK;
Thanks for your prompt response.
W.G referred to Wind Girder.
Ok, you paste the definition from the code, however, my question for part A still mystery and not clear?
Mohd Yaseen
Dears;
in reference to API 650, edition 13;
(1) DLS (shell dead load) defined as nominal (Shell + Any Framing (but not Roof Plates) supported by Shell & Roof) Weights; so I kept DLS as =
Nominal (Shell + (Roof Framing/Structure + C. Angle + W.G + Insulation +...
Dear JStephen;
Thanks for your respond.
F.4.2 assessed for anchorage concerned to the internal pressure only, others stability is covered in Basic Design Section. Now I can say I have the option to ignore F.4.2 evaluation as long as I am going to anchor my tank.
F.4.3, shall be assessed...
I understood that the Pre-set design internal pressure for your tank shall be adjusted base on the MIN(PF.4.1 , PF.4.2).
That is clear; if my tank is going to be mechanically-anchored; should ignore the value of calculated PF.4.2 & adjust the Tank design internal pressure base on PF.4.1 Only...
As per (5.1.5.9 (e)), for Self-Supporting Roofs FULFILLED conditions in 5.10.5 & 5.10.6 (Participating Area for Figure-F-2 selected detail ≥ (p D2 ÷ 8 Fa tanθ));
(1) On that case, is that mean, the Top Curb Angle IS NO LONGER REQUIRED?
(2) Participating Area (referred in 5.10.5 & 5.10.6) is the...
Table 5.19a—Section provide the (Z) Modulus (cm3) of Stiffening-Ring Sections with reference to Selected Detail from Figure 5.24, My question; How I can calculate the Actual Area required to estimate the weight of Wind Girder (either Top or Intermediate)?
Mohd Yaseen
Dear IFRs;
I could Say:
Top Wind Girder (As per 5.9.5 & V.8.2.3 (if applicable) SHALL be provided at all cases.
Top Curb Angle (As per 5.1.5.9) SHALL be Provided in cases stated in (5.1.5.9) being fulfilled + Top Wind Girder located @ distance > 0.6m from Top of Shell.
Mohd Yaseen
Dear IFR:
Thanks for your responds;
- In case of calculations resulted, NO intermediate W.G is required, is that means Top Curb Angle shall be used regardless the tank type (with fixed roof or open roof)?
- What about question (B), different sizes for Top Curb Angles based on different...
(A) I have Understood that Top Curb Angle (Figure F.2) shall be provided if 5.9.5.2 condition met (Top Wind Girder (per Table 5.19a & Figure 5.24) is located more than 0.6 m below the Top of Shell) or in case of Open Tank.
Am I correct?
Also, when Top Wind Girder as per 5.9.5 shall be provided...
Dear JStephen/Geoff13;
For (5.11.4) Sliding Friction check, As I understood from you, the Maximum Allowable Sliding Friction shall be:
Fwind = (PWS * As-Vertical)
is it the same value as stated in F.8.2 (a) Uplift from Design Wind Velocity on Tank?
Mohd Yaseen
Dear HTURKAK & Geoff13
Thanks for your inputs.
Now Dead load issue is clear.
Dear Geoff13;
about Internal Pressure; agree with you 18 Kpa is normally didn't reached & is considerably large compare to the OP of the ATM Tanks, however, my question is mainly focusing on PF.4.1/PF.4.2 compare to...
Dear Geoff13;
You replied that the shaded area in Figure F.2 is the available area (Participating Compression Area as stated in F.2.2) must be greater than (or equal) the minimum required area (Cross-sectional Area as stated in F.2.2).
Ok, let us come to statement in 5.10.5.2 that given...
