asme b31.3 pipe thickness for 10 inch vent stack

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10 INCH S.S PIPE THICK CALCULATION ASME B31.3 - 304 Pressure Design of Components I/P ASME 304.1 Straight Pipe tm = t+c tm = > Minimum Thickness t=> Calculated thickness : P.D/(SA.E + P.Y) P=> Design Pressure in Bar 3.5 Bar D=> Outer Diameter of Pipe in mm 273 mm Allowable Stress (SA) as per ASME B31.3 table A-1 for TP 304 :20 KSI 20000 PSI 1406 in Kg/cm2 E=> Quality factor from ASME B31.3 Table A-1A or A-1B 1 Y=> Coefficient as per table ASME B31.3/ 304.1.1 0.4 c=> Sum of Mechanical, Corossion and errosion allowances in 0 mm P (Bar) O.D (mm) SA (Kg/cm2) E Y t tm = t+c (mm) 3.5 273 1406 1 0.4 0.339455733978 0.339455733978 SELECTED PIPE THICKNESS 9.27 MM

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Page 1: ASME B31.3 Pipe Thickness for 10 Inch VENT STACK

10 INCH S.S PIPE THICK CALCULATIONASME B31.3 - 304 Pressure Design of Components I/PASME 304.1 Straight Pipetm = t+ctm = > Minimum Thicknesst=> Calculated thickness : P.D/(SA.E + P.Y)P=> Design Pressure in Bar 3.5 BarD=> Outer Diameter of Pipe in mm 273 mmAllowable Stress (SA) as per ASME B31.3 table A-1for TP 304 :20 KSI 20000 PSI 1406 in Kg/cm2E=> Quality factor from ASME B31.3 Table A-1A or A-1B 1Y=> Coefficient as per table ASME B31.3/ 304.1.1 0.4c=> Sum of Mechanical, Corossion and errosion allowances in mm: 0 mm

P (Bar) O.D (mm) SA (Kg/cm2) E Y t tm = t+c (mm)3.5 273 1406 1 0.4 0.339455733978 0.339455733978

SELECTED PIPE THICKNESS 9.27 MM

Page 2: ASME B31.3 Pipe Thickness for 10 Inch VENT STACK

6 INCH S.S PIPE THICK CALCULATIONASME B31.3 - 304 Pressure Design of Components I/PASME 304.1 Straight Pipetm = t+ctm = > Minimum Thicknesst=> Calculated thickness : P.D/(SA.E + P.Y)P=> Design Pressure in Bar 3.5 BarD=> Outer Diameter of Pipe in mm 168.3 mmAllowable Stress (SA) as per ASME B31.3 table A-1for TP 304 :20 KSI 20000 PSI 1406 in Kg/cm2E=> Quality factor from ASME B31.3 Table A-1A or A-1B 1Y=> Coefficient as per table ASME B31.3/ 304.1.1 0.4c=> Sum of Mechanical, Corossion and errosion allowances in mm: 0 mm

P (Bar) O.D (mm) SA (Kg/cm2) E Y t tm = t+c (mm)3.5 168.3 1406 1 0.4 0.209268864573 0.209268864573

SELECTED PIPE THICKNESS 3.40 MM

Page 3: ASME B31.3 Pipe Thickness for 10 Inch VENT STACK

2 INCH S.S PIPE THICK CALCULATIONASME B31.3 - 304 Pressure Design of Components I/PASME 304.1 Straight Pipetm = t+ctm = > Minimum Thicknesst=> Calculated thickness : P.D/(SA.E + P.Y)P=> Design Pressure in Bar 3.5 BarD=> Outer Diameter of Pipe in mm 60.3 mmAllowable Stress (SA) as per ASME B31.3 table A-1for TP 304 :20 KSI 20000 PSI 1406 in Kg/cm2E=> Quality factor from ASME B31.3 Table A-1A or A-1B 1Y=> Coefficient as per table ASME B31.3/ 304.1.1 0.4c=> Sum of Mechanical, Corossion and errosion allowances in mm: 0 mm

P (Bar) O.D (mm) SA (Kg/cm2) E Y t tm = t+c (mm)3.5 60.3 1406 1 0.4 0.074978684098 0.074978684098

SELECTED PIPE THICKNESS 2.77 MM

Page 4: ASME B31.3 Pipe Thickness for 10 Inch VENT STACK

REINFORCEMENT CALCULATION FOR 10"X 6".ASME B31.3 - 304.3.3 I/PO.D=> Outer Diameter of Header Pipe in mm 273 mmo.d=> Outer Diameter of Branch Pipe in mm 168.3 mmC=> Sum of Mechanical, Corossion and errosion allowances in mm: 0 mmOriginal thickness of header pipe 9.27 mmOriginal thickness of branch pipe 3.4 mm

0.339 mm

0.2092 mm

8.11125 mm

2.975 mmβ = 90 degree

162.35 mm

92.26125 mm

110.0733

172.330213125

112.17047625

A4 = 2(1/2)*L4 20.278125

20.278125A2+A3+A4 304.778814375

RESULT NO R.F PAD TO BE PROVIDED.

th = > Calculated thickness of header pipe

tb = > Calculated thickness of branch pipe

Th = Original Thickness of Header X (1-12.5%)

Tb = Original Thickness of Branch X (1-12.5%)

d1 = O.D - 2(Tb-C)/ Sinβ

d2 = (Tb-C) + (Th-C) + d1/2

A1 = th*d1*(2-Sinβ) mm2

A2 = (2d2-d1)*(Th-th-C) mm2

A3 = 2*L4*(Tb-tb-c) / Sinβ mm2

mm2

L4 = 2.5*(Th-C)

A2+A3+A4>A1

Page 5: ASME B31.3 Pipe Thickness for 10 Inch VENT STACK

REINFORCEMENT CALCULATION FOR 10"X 2".ASME B31.3 - 304.3.3 I/PO.D=> Outer Diameter of Header Pipe in mm 273 mmo.d=> Outer Diameter of Branch Pipe in mm 60.3C=> Sum of Mechanical, Corossion and errosion allowances in mm: 0 mmOriginal thickness of header pipe 4.19 mmOriginal thickness of branch pipe 2.77 mm

0.339 mm

0.074 mm

3.66625 mm

2.42375 mmβ = 90 degree

55.4525 mm

33.81625 mm

37.596795

40.525905

43.0738546875

A4 = 2(1/2)*L4 9.165625

9.165625 mm

A2+A3+A4 92.7653846875R.F Pad is required

RESULT NO R.F PAD TO BE PROVIDED.

th = > Calculated thickness of header pipe

tb = > Calculated thickness of branch pipe

Th = Original Thickness of Header X (1-12.5%)

Tb = Original Thickness of Branch X (1-12.5%)

d1 = O.D - 2(Tb-C)/ Sinβ

d2 = (Tb-C) + (Th-C) + d1/2

A1 = th*d1*(2-Sinβ) mm2

A2 = (2d2-d1)*(Th-th-C) mm2

A3 = 2*L4*(Tb-tb-c) / Sinβ mm2

mm2

L4 = 2.5*(Th-C)

A2+A3+A4>A1