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    Branch Reinforcement - ASME 31.1

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    zakir84md3639
    The document summarizes the calculation of branch reinforcement for a pipe system. It provides details on the header pipe with a nominal pipe size of 300 NB, outside diameter of 323.8 mm, and schedule of 160. It also provides details on the branch pipe with a nominal pipe size of 25 NB, outside diameter of 33.4 mm, and schedule of 160. It then performs calculations to determine the required reinforcement area and any excess thickness based on the design pressure, temperature, material, and branch angle. The calculations show that no additional reinforcement is required.

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    Branch Reinforcement - ASME 31.1

    Uploaded by

    zakir84md3639
    371 views8 pages
    The document summarizes the calculation of branch reinforcement for a pipe system. It provides details on the header pipe with a nominal pipe size of 300 NB, outside diameter of 323.8 mm, and schedule of 160. It also provides details on the branch pipe with a nominal pipe size of 25 NB, outside diameter of 33.4 mm, and schedule of 160. It then performs calculations to determine the required reinforcement area and any excess thickness based on the design pressure, temperature, material, and branch angle. The calculations show that no additional reinforcement is required.

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    Reinforcement

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    The document summarizes the calculation of branch reinforcement for a pipe system. It provides details on the header pipe with a nominal pipe size of 300 NB, outside diameter of 323.8 mm, and schedule of 160. It also provides details on the branch pipe with a nominal pipe size of 25 NB, outside diameter of 33.4 mm, and schedule of 160. It then performs calculations to determine the required reinforcement area and any excess thickness based on the design pressure, temperature, material, and branch angle. The calculations show that no additional reinforcement is required.

    Copyright:

    © All Rights Reserved
    Download as XLS, PDF, TXT or read online from Scribd
    Download as xls, pdf, or txt
    371 views8 pages

    Branch Reinforcement - ASME 31.1

    Uploaded by

    zakir84md3639
    The document summarizes the calculation of branch reinforcement for a pipe system. It provides details on the header pipe with a nominal pipe size of 300 NB, outside diameter of 323.8 mm, and schedule of 160. It also provides details on the branch pipe with a nominal pipe size of 25 NB, outside diameter of 33.4 mm, and schedule of 160. It then performs calculations to determine the required reinforcement area and any excess thickness based on the design pressure, temperature, material, and branch angle. The calculations show that no additional reinforcement is required.

    Copyright:

    © All Rights Reserved
    Download as XLS, PDF, TXT or read online from Scribd
    Download as xls, pdf, or txt
    You are on page 1of 8

    Nominal Pipe Size (Header) 300 NB

    Outside Diameter (Dh) 323.8 mm


    Select Schdule

    ● Standard Extra Strong Double Extra Strong

    5s 10s 20s 30s 40s 60s 80s


    Th
    100s 120s 140s ● 160s 33.32
    Inside Diameter (Dhi)
    257.16
    Weight / M 238.69

    NA - Not Availble

    Nominal Pipe Size (Branch) 25 NB


    Outside Diameter (Db) 33.4 mm
    Select Schdule 160

    Tb 6.35
    Inside Diameter (Dbi) 20.70
    Weight / M 4.24
    mm
    mm
    Kg

    mm
    mm
    Kg
    Branch Re-inforcement Calculation ASME B31.1 104.3.1
    TITLE
    SUBJECT
    Header: Branch:
    Outside Diameter, Dh = 323.80 Outside Diameter, Db = 33.40
    Provided Thickness, th = 33.32 Provided Thickness, tb = 6.35
    Design Pressure, P (Kg/cm2) = 121.00 Design Pressure, P (Kg/cm2) = 121.00
    Design Temperature, Th (oC) = 474.00 Design Temperature, Th (oC) = 474.00
    Material of Construction SA 335 P22 Material of Construction SA 335 P22
    Allowance, A = 1.00 Allowance, A = 1.00
    Allowable stress, SE (Kg/cm2) = 972.7100176 Allowable stress, SE (Kg/cm2) = 972.7100176

    Angle between axes of branch & run B, deg = 90

    Required Reinforcement Area


    A7= (tmh-A)*d1(2-SinB) tmh= P.Dh/(2.(SE+Py))+A tmb= P.Db/(2.(SE+Py))+A
    = 20.185 mm = 2.983 mm
    A7= 397.128 mm2
    Hole dia., d1= [Db-2.(Tb-c)]/SinB
    = 22.700 mm

    Excess Thickness in Run Pipe Wall


    A1= (2d2-d1)(th-tmh) d2= (tb-A)+(th-A)+d1/2 or d1
    A1= 989.598 mm2 = 49.020 or 22.700 (which ever is greater)
    = 49.020 mm

    Excess Thickness in Branch Pipe Wall


    A2= 2.L4.(Tb-tmb)/SinB L4= 2.5.(Th-A) or 2.5.(Tb-A)+tr
    A2= 90.067 mm2 = 80.800 or 13.375 (which ever is less)
    = 13.375 mm

    A3 & A4 Area Provided by Welds and Attachments (Not Included).

    AReq= Additional replacement area required = A7-A1-A2

    AReq= -682.537 mm2

    Using Pipe of min thickness 0.000 mm

    A Pad of minimum width 0.00 mm is required.

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