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P0401A1 BRANCH REINFORCEMENT CALCULATION

CALCULATION SHEET

1 BRANCH REINFORCEMENT CALCULATION

CODE : ASME B31.3 (2002 EDN)

A DESIGN CONDITIONBranch Angle a = 90 DegreeDesign Pressure P = 15 Bar

= 0.15 kg/mm2Design Temperature = 65 COpening on Longitudinal Seam = NO

A.1 REINFORCEMENTType = PadMaterial = A106 Gr.BThickness of Attached Reinforcing Plat tr = 9.52 mmDiameter, Dr = 0 mm (max. Dr = 2*d2) 219.5Allowable Stress = 14.97 kg/mm2 (21300psi) (TABLE K-1)K (max=1) = Sr/Sh K = 1

A.2 PIPE LINE DATA HEADER BRANCHLi N b

=

Line Number : = =Nominal Pipe Size = 24 inch = 4 inchSchedule Number = Sch.20 = Sch.40Material = API-5L = A106 Gr.BPipe Outside Diameter, Do Doh = 609.6 mm Dob = 114.3 mmNominal Pipe Thickness Th' = 9.52 mm Tb' = 6.02 mmMaximum Allowable Stress SE = 14.97 kg/mm2 SE = 14.97 kg/mm2Corrosion Allowance, C Ch = 3 mm Cb = 3 mm,Value of Coefficient y = 0.4 y = 0.4Mill Tolerance, F Fh = 12.5 % Fb = 12.5 %

B THROAT OF FILLET WELDG(min. 6mm) or 0.7 (Tb') = 6.0 mmGr = 0.5 Tr = 4.8 mm

C PIPE WALL THICKNESS CALCULATIONActual minimum Thickness of Pipe Th =Th' (1 - Fh / 100) Tb = Tb' (1 - Fb / 100)

= 8.33 mm = 5.2675 mm

Pressure Thickness of Pipe tmh = P*Doh / 2 (SE + Py) tmb = P*Dob / 2 (SE + Py)= 3.10 mm = 0.58 mm

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D REINFORCEMENT ZONED REINFORCEMENT ZONEd1 = [Dob - 2(Tb - Cb)] / sin a = 109.77 mmd2' = (Tb - Cb) + (Th - Ch) + d1/2 = 62.48 mmd2 = Greater of d1 or d2' = 109.77 mm (max. = Doh) OKL4a = 2.5 (Tb - Cb) + tr = 15.19 mmL4b = 2.5 (Th - Ch) = 13.33 mmL4 = Smaller of L4a or L4b = 13.33 mm

D 0 0Dr = 0.0 mm2*dr = 219.5 mm

( X ) Dr < 2*dr( ) Dr > 2 * dr

USED Dr = 0.0 mm NO GOOD!!!

E AVAILABLE REINFORCEMENT AREAA1 = (2d2 - d1) (Th - tmh - Ch) = 244.60 mm2 (Area in Header)A2 2*L4*((Tb b Cb) / i ) 44 93 2 (A i B h)A2 = 2*L4*((Tb - tmb - Cb) / sin a) = 44.93 mm2 (Area in Branch)A3 = [2*G^2*Cot (a/2)] + 2*Gr^2 = 117.32 mm2 (Area in Fillet Weld)A4 = K*tr (Dr - Dob / sin a) = -1,088.14 mm2 (Area in Pad)AT = A1 + A2 + A3 + A4 = -681.29 mm2 (Total Area)

F REQUIRED REINFORCEMENT AREAA7 = tmh * d1 (2 - sin a) = 340.45 mm2

G CONCLUSION

AT < A7 ==> Inadequate Reinforcement.

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