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  1. MohdYaseen2010

    V 9.3.1 Required Minimum Level of Liquid to be maintained Inside Tank

    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...
  2. MohdYaseen2010

    DLs & DLr

    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 +...
  3. MohdYaseen2010

    F.4.2 Pressure limitation for mechanically-anchored Tank?

    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...
  4. MohdYaseen2010

    Participating Area (5.10.5 & 5.10.6) Vs Design Effective Area (5.1.5.9 (e))

    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...
  5. MohdYaseen2010

    calculate the Actual Area required of Wind Girder?

    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
  6. MohdYaseen2010

    Top Curb Angle or Top Wind Girder?

    (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...
  7. MohdYaseen2010

    5.11.4 Sliding Friction (Wind Force) & 5.11.2 Self-Anchored Tanks (Overturning Moment)

    (A) For (5.11.4) Sliding Friction check, I put Fwind = (PWS * As-Vertical) + (PWR * Ar-Horizontal) where: PWS (Design Wind Pressure on Shell) [see 5.2.1k.1)] = 0.89 kPa (V/190)^2. As-Vertical (Vertical Projected Areas of Shell) = Shell Height * (D + 2 * tins-shell). PWR (Design Wind...
  8. MohdYaseen2010

    F.6.1 - calculate the Minimum Roof Thick required for Internal Pressure (t)

    In F.6.1, to calculate the Minimum Roof Thick required for Internal Pressure (t), you required to estimate the P = Internal Design Pressure – Effect of Nominal Roof Dead Load. - How to estimate the Effect of Nominal Roof Dead Load? - I presumed that the (Internal Design Pressure)...
  9. MohdYaseen2010

    Cross-Sectional Area of Cone

    What is the equation for calculating the Cross-Sectional Area of the Cone? As per 5.10.5 & 5.10.6, Cross-Sectional Area of Cone is required to be compared with the Participating Compression Area (hatched area calculated from Figure F.2). Mohd Yaseen
  10. MohdYaseen2010

    In API 650 Edition 13th - (Shell-to-Roof) Junction Area

    In API 650 Edition 13th (A) With regard to the (Shell-to-Roof) Junction Area, there are the following expressions; 1. Total Required Compression Area @ Junction calculated as in F.5.1. 2. (F.2.2 &/or F.4.1) stated that Participating Compression Area @ Junction determined by Figure F.2...
  11. MohdYaseen2010

    GRE Pipeline (Integral vs Section) Hydostatic Test

    Our case as follow; GRE (API 15LR) pipeline with 41 Km length & difference of elevation (141 m @ source, 13m @ 32KM from source, 22m @ 41KM). Pipeline Design Pressure (DP) is 2MPa for the first 32KM & 3MPa for the rest 9KM. The Contractor has execute hydrostatic pressure in sections (4 sections)...
  12. MohdYaseen2010

    FV For Vessel with direct pump connection.

    Dears; I had instructed our designer to consider FV for the vessel that directly delivering to pumps. In my view, all vessels having pumps at its downstream (directly) or designed for flush-out (sand accumulation, etc.) shall be deigned for FV? I am right? please correct me if am I wrong...
  13. MohdYaseen2010

    MOV (motor operated valve) Selection and basis

    Dears; I querying about any standard or reference that can a basis for the MOV (motor operated valve) Selection? If not, How we can judge whether we need MOV or Manual Valve? in other way, when we use MOV over the manual valve? Mohd Yaseen
  14. MohdYaseen2010

    Cleanout Door PWHT Problem

    Dears; we are constructing new storage tank having the following data; Design Code = API 650 Materials = A 283 C (Group I) Design Temperature = 85C Stressed Components include: Shell = 12 mm, 10 mm, 8 mm RF of Cleanout Door = 16 mm RF of Flush-Type Shell Connections = 12mm (N9), 12mm (N10)...
  15. MohdYaseen2010

    EFW Vs SMLS

    Dears; Our Contractor is seeking for changing our plant piping materials from SMLS to EFW. As I know the Seam (EFW) pipes are used in low pressure and medium pressure applications while the SMLS is utilized for the high pressure application. My queries; 1- To which value can I classify the...
  16. MohdYaseen2010

    Vessel External Pressure Case

    Dears; We have the following case; Plant having first stage separator delivering the crude to the second stage separator, the second stage separator is directly connected to the high pressure export pumps (no buffer tank). In my view the second stage separator shall be designed for external...
  17. MohdYaseen2010

    ICCP for DI Pipeline

    Do you think that ICCP is required for ductile iron pipeline? Mohd Yaseen
  18. MohdYaseen2010

    Carbon Steel With Duplex SS

    Dears; Do I need to have an Isolation member (isolation joint , isolation flange or kits) between two lines constructed from dissimilar Metals specifically Carbon Steel And Duplex Stainless Steel. For the same situation I have three cases; 1/ Both lines are running aboveground. 2/ One line...
  19. MohdYaseen2010

    Sacrificial Anode Vs Impressed Current CP

    For pipeline, When shall use Sacrificial Anode & when we shall use Impressed Current CP? Our Contractor saying that they will use Impressed Current for our Carbon Steel pipeline, while they are plan for Sacrificial Anode for Duplex S.S trunkline. Also they are saying no need for CP system for...
  20. MohdYaseen2010

    ductile iron with GRE & Carbon Steel

    Does anyone know how to connect a ductile iron pipe with GRE pipe Also How to connect a ductile iron pipe with carbon steel pipe Mohd Yaseen

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