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IBR Thickness Cal

The document provides calculations to determine the minimum wall thickness of carbon steel pipes using the Indian Boiler Regulation 350 standard. It includes input data such as material specifications, service conditions, pressures and diameters for pipes ranging from 0.5 to 24 inches. The calculations use equations from IBR 350 to find the allowable stress and minimum required thickness for each pipe size based on yield strength, tensile strength and design parameters. The selected thickness is also shown to comply with ASME B36.10 standards.

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Sumantra Chattopadhyay
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135 views8 pages

IBR Thickness Cal

The document provides calculations to determine the minimum wall thickness of carbon steel pipes using the Indian Boiler Regulation 350 standard. It includes input data such as material specifications, service conditions, pressures and diameters for pipes ranging from 0.5 to 24 inches. The calculations use equations from IBR 350 to find the allowable stress and minimum required thickness for each pipe size based on yield strength, tensile strength and design parameters. The selected thickness is also shown to comply with ASME B36.10 standards.

Uploaded by

Sumantra Chattopadhyay
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
You are on page 1/ 8

CALS REFINERIES LIMITED Calculation by: SGC DOC NO.

246410-000-CA-3003

JOB No.: 246410 IN01 Checked by: SGN

PIPE WALL THICKNESS CALCULATION TO IBR 350


Input Data (Red & Bold) :

Pipe Material Specification Code = C09B0 Material Specification Code = ASTM A106 GR.B (SMLS)

Service Fluid = BF WATER Material of Construction for Pipe = CS

Corrosion Allowance, c [mm] = 1.600 Design Temperature [ºC] = 210

Efficiency Factor, e [Unitless] = 1.00 Maximum Working Pressure or Design Pressure, P [kg/cm2g] = 69.00

IBR 350 indicates that the Maximum Working Pressure (W.P.) Outside Diameter of Pipe = D in [cm];

allowed on Steel Pipes shall be determined by the Equation (91), Allowable Stress of Pipe Material = f in [kg/cm2];

where the outside diameter of pipe is the basis for calculation. For temperatures at or below 454oC, f is the lower of

Equation (91) states that: the following two values (Et/1.5 or R/2.7).

Where, Et = Yeild Point ( 0.2% proof stress at the design temperature)


2 fe(t−c )
W . P .= R = Specified Minimum Tensile Strength of the steel at room temperature

D−t+c Specified Minimum Tensile Strength, R [kg/cm2] = 4218.4000

Where, t is the minimum acceptable thickness of steel pipe in [cm]; Specified Minimum Yield Strength, Et [kg/cm2] = 1398.4100

Selected
f = Lower of Calculated
Pipe Size in Pipe Size in OD of Pipe, D Value of Et Value of Et/1.5 Value of R Value of R/2.7 Thickness in
Et/1.5 or R/2.7 Thickness, t in
[inch] NB [mm] NB [cm] [kg/cm2] [kg/cm2] [kg/cm2] [kg/cm2] [mm] as per
[kg/cm2] [mm]
ASME B36.10

0.50 15 2.13 1398.4100 932.2733 4218.4000 1562.3704 932.2733 2.70 3.73


0.75 20 2.67 1398.4100 932.2733 4218.4000 1562.3704 932.2733 2.92 3.91
1.00 25 3.34 1398.4100 932.2733 4218.4000 1562.3704 932.2733 3.19 4.55
1.50 40 4.83 1398.4100 932.2733 4218.4000 1562.3704 932.2733 3.80 5.08
2.00 50 6.03 1398.4100 932.2733 4218.4000 1562.3704 932.2733 4.29 5.54
3.00 80 8.89 1398.4100 932.2733 4218.4000 1562.3704 932.2733 5.45 5.49
4.00 100 11.43 1398.4100 932.2733 4218.4000 1562.3704 932.2733 6.49 8.56
6.00 150 16.83 1398.4100 932.2733 4218.4000 1562.3704 932.2733 8.69 10.97
8.00 200 21.91 1398.4100 932.2733 4218.4000 1562.3704 932.2733 10.76 12.70
10.00 250 27.31 1398.4100 932.2733 4218.4000 1562.3704 932.2733 12.97 15.09
12.00 300 32.39 1398.4100 932.2733 4218.4000 1562.3704 932.2733 15.04 17.48
14.00 350 35.56 1398.4100 932.2733 4218.4000 1562.3704 932.2733 16.33 19.05
16.00 400 40.64 1398.4100 932.2733 4218.4000 1562.3704 932.2733 18.40 21.44

Sheet 1 of 8
18.00 450 45.72 1398.4100 932.2733 4218.4000 1562.3704 932.2733 20.47 23.83
20.00 500 50.8 1398.4100 932.2733 4218.4000 1562.3704 932.2733 22.55 26.19
24.00 600 60.9 1398.4100 932.2733 4218.4000 1562.3704 932.2733 26.67 30.96

Sheet 2 of 8
CALS REFINERIES LIMITED Calculation by: SGC DOC NO. 246410-000-CA-3003

JOB No.: 246410 IN01 Checked by: SGN

PIPE WALL THICKNESS CALCULATION TO IBR 350


Input Data (Red & Bold) :

Pipe Material Specification Code = B09B0 Material Specification Code = ASTM A106 GR.B (SMLS)

Service Fluid = MP Steam Material of Construction for Pipe = CS

Corrosion Allowance, c [mm] = 1.6 Design Temperature [ºC] = 320

Efficiency Factor, e [Unitless] = 1.00 Maximum Working Pressure or Design Pressure, P [kg/cm2g] = 18.50

IBR 350 indicates that the Maximum Working Pressure (W.P.) Outside Diameter of Pipe = D in [cm];

allowed on Steel Pipes shall be determined by the Equation (91), Allowable Stress of Pipe Material = f in [kg/cm2];

where the outside diameter of pipe is the basis for calculation. For temperatures at or below 454oC, f is the lower of

Equation (91) states that: the following two values (Et/1.5 or R/2.7).

Where, Et = Yeild Point ( 0.2% proof stress at the design temperature)


2 fe(t−c )
W . P .= R = Specified Minimum Tensile Strength of the steel at room temperature

D−t+c Specified Minimum Tensile Strength, R [kg/cm2] = 4218.4000

Where, t is the minimum acceptable thickness of steel pipe in [cm]; Specified Minimum Yield Strength, Et [kg/cm2] = 1212.9300

Selected
f = Lower of Calculated
Pipe Size in Pipe Size in OD of Pipe, D Value of Et Value of Et/1.5 Value of R Value of R/2.7 Thickness in
Et/1.5 or R/2.7 Thickness, t in
[inch] NB [mm] NB [cm] [kg/cm2] [kg/cm2] [kg/cm2] [kg/cm2] [mm] as per
[kg/cm2] [mm]
ASME B36.10

0.50 15 2.13 1212.9300 808.6200 4218.4000 1562.3704 808.6200 2.10 3.73


0.75 20 2.67 1212.9300 808.6200 4218.4000 1562.3704 808.6200 2.17 3.91
1.00 25 3.34 1212.9300 808.6200 4218.4000 1562.3704 808.6200 2.26 4.55
1.50 40 4.83 1212.9300 808.6200 4218.4000 1562.3704 808.6200 2.45 5.08
2.00 50 6.03 1212.9300 808.6200 4218.4000 1562.3704 808.6200 2.61 3.91
3.00 80 8.89 1212.9300 808.6200 4218.4000 1562.3704 808.6200 2.98 5.49
4.00 100 11.43 1212.9300 808.6200 4218.4000 1562.3704 808.6200 3.31 6.02
6.00 150 16.83 1212.9300 808.6200 4218.4000 1562.3704 808.6200 4.00 7.11
8.00 200 21.91 1212.9300 808.6200 4218.4000 1562.3704 808.6200 4.66 6.35
10.00 250 27.31 1212.9300 808.6200 4218.4000 1562.3704 808.6200 5.36 6.35
12.00 300 32.39 1212.9300 808.6200 4218.4000 1562.3704 808.6200 6.02 6.35
14.00 350 35.56 1212.9300 808.6200 4218.4000 1562.3704 808.6200 6.42 9.53
16.00 400 40.64 1212.9300 808.6200 4218.4000 1562.3704 808.6200 7.08 9.53

Sheet 3 of 8
18.00 450 45.72 1212.9300 808.6200 4218.4000 1562.3704 808.6200 7.74 9.53
20.00 500 50.8 1212.9300 808.6200 4218.4000 1562.3704 808.6200 8.39 9.53
24.00 600 60.9 1212.9300 808.6200 4218.4000 1562.3704 808.6200 9.70 10.31

Sheet 4 of 8
CALS REFINERIES LIMITED Calculation by: SGC DOC NO. 246410-000-CA-3003

JOB No.: 246410 IN01 Checked by: SGN

PIPE WALL THICKNESS CALCULATION TO IBR 350


Input Data (Red & Bold) :

Pipe Material Specification Code = A09B0 Material Specification Code = ASTM A106 GR.B (SMLS)

Service Fluid = LP STEAM Material of Construction for Pipe = CS

Corrosion Allowance, c [mm] = 1.6 Design Temperature [ºC] = 210

Efficiency Factor, e [Unitless] = 1.00 Maximum Working Pressure or Design Pressure, P [kg/cm2g] = 7.00

IBR 350 indicates that the Maximum Working Pressure (W.P.) Outside Diameter of Pipe = D in [cm];

allowed on Steel Pipes shall be determined by the Equation (91), Allowable Stress of Pipe Material = f in [kg/cm2];

where the outside diameter of pipe is the basis for calculation. For temperatures at or below 454oC, f is the lower of

Equation (91) states that: the following two values (Et/1.5 or R/2.7).

Where, Et = Yeild Point ( 0.2% proof stress at the design temperature)


2 fe(t−c )
W . P .= R = Specified Minimum Tensile Strength of the steel at room temperature

D−t+c Specified Minimum Tensile Strength, R [kg/cm2] = 4218.40

Where, t is the minimum acceptable thickness of steel pipe in [cm]; Specified Minimum Yield Strength, Et [kg/cm2] = 1398.41

Selected
f = Lower of Calculated
Pipe Size in Pipe Size in OD of Pipe, D Value of Et Value of Et/1.5 Value of R Value of R/2.7 Thickness in
E t/1.5 or R/2.7 Thickness, t in
[inch] NB [mm] NB [cm] [kg/cm2] [kg/cm2] [kg/cm2] [kg/cm2] [mm] as per
[kg/cm2] [mm]
ASME B36.10

0.50 15 2.13 1398.4100 932.2733 4218.4000 1562.3704 932.2733 1.92 2.77


0.75 20 2.67 1398.4100 932.2733 4218.4000 1562.3704 932.2733 1.94 2.87
1.00 25 3.34 1398.4100 932.2733 4218.4000 1562.3704 932.2733 1.97 3.38
1.50 40 4.83 1398.4100 932.2733 4218.4000 1562.3704 932.2733 2.04 3.68
2.00 50 6.03 1398.4100 932.2733 4218.4000 1562.3704 932.2733 2.09 3.91
3.00 80 8.89 1398.4100 932.2733 4218.4000 1562.3704 932.2733 2.21 5.49
4.00 100 11.43 1398.4100 932.2733 4218.4000 1562.3704 932.2733 2.32 6.02
6.00 150 16.83 1398.4100 932.2733 4218.4000 1562.3704 932.2733 2.55 7.11
8.00 200 21.91 1398.4100 932.2733 4218.4000 1562.3704 932.2733 2.77 6.35
10.00 250 27.31 1398.4100 932.2733 4218.4000 1562.3704 932.2733 3.00 6.35
12.00 300 32.39 1398.4100 932.2733 4218.4000 1562.3704 932.2733 3.21 6.35
14.00 350 35.56 1398.4100 932.2733 4218.4000 1562.3704 932.2733 3.35 6.35

Sheet 5 of 8
16.00 400 40.64 1398.4100 932.2733 4218.4000 1562.3704 932.2733 3.57 6.35
18.00 450 45.72 1398.4100 932.2733 4218.4000 1562.3704 932.2733 3.78 6.35
20.00 500 50.8 1398.4100 932.2733 4218.4000 1562.3704 932.2733 4.00 9.53
24.00 600 60.9 1398.4100 932.2733 4218.4000 1562.3704 932.2733 4.43 9.53

Sheet 6 of 8
CALS REFINERIES LIMITED Calculation by: SGC DOC NO. 246410-000-CA-3003

JOB No.: 246410 IN01 Checked by: SGN

PIPE WALL THICKNESS CALCULATION TO IBR 350


Input Data (Red & Bold) :

Pipe Material Specification Code = C73B0 Material Specification Code = ASTM A335 GR. P91

Service Fluid = HP STEAM Material of Construction for Pipe = AS

Corrosion Allowance, c [mm] = 1.6 Design Temperature [ºC] = 500

Efficiency Factor, e [Unitless] = 1.0 Maximum Working Pressure or Design Pressure, P [kg/cm2g] = 44.00

IBR 350 indicates that the Maximum Working Pressure (W.P.) Outside Diameter of Pipe = D in [cm];

allowed on Steel Pipes shall be determined by the Equation (91), Allowable Stress of Pipe Material = f in [kg/cm2];

where the outside diameter of pipe is the basis for calculation. For temperatures at or below 454oC, f is the lower of

Equation (91) states that: the following two values (Et/1.5 or R/2.7).

Where, Et = Yeild Point ( 0.2% proof stress at the design temperature)


2 fe(t−c )
W . P .= R = Specified Minimum Tensile Strength of the steel at room temperature

D−t+c Specified Minimum Tensile Strength, R [kg/cm2] = 5976.090

Where, t is the minimum acceptable thickness of steel pipe in [cm]; Specified Minimum Yield Strength, Et [kg/cm2] = 1284.370

Selected
f = Lower of Calculated
Pipe Size in Pipe Size in OD of Pipe, D Value of Et Value of Et/1.5 Value of R Value of R/2.7 Thickness in
Et/1.5 or R/2.7 Thickness, t in
[inch] NB [mm] NB [cm] [kg/cm2] [kg/cm2] [kg/cm2] [kg/cm ]
2
[mm] as per
[kg/cm2] [mm]
ASME B36.10

0.50 15 2.13 1284.3700 856.2467 5976.0900 2213.3667 856.2467 2.44 3.73


0.75 20 2.67 1284.3700 856.2467 5976.0900 2213.3667 856.2467 2.59 3.91
1.00 25 3.34 1284.3700 856.2467 5976.0900 2213.3667 856.2467 2.78 4.55
1.50 40 4.83 1284.3700 856.2467 5976.0900 2213.3667 856.2467 3.21 5.08
2.00 50 6.03 1284.3700 856.2467 5976.0900 2213.3667 856.2467 3.55 3.91
3.00 80 8.89 1284.3700 856.2467 5976.0900 2213.3667 856.2467 4.37 5.49
4.00 100 11.43 1284.3700 856.2467 5976.0900 2213.3667 856.2467 5.10 6.02
6.00 150 16.83 1284.3700 856.2467 5976.0900 2213.3667 856.2467 6.65 7.11
8.00 200 21.91 1284.3700 856.2467 5976.0900 2213.3667 856.2467 8.10 8.18
10.00 250 27.31 1284.3700 856.2467 5976.0900 2213.3667 856.2467 9.65 12.70
12.00 300 32.39 1284.3700 856.2467 5976.0900 2213.3667 856.2467 11.10 14.27
14.00 350 35.56 1284.3700 856.2467 5976.0900 2213.3667 856.2467 12.01 15.09
16.00 400 40.64 1284.3700 856.2467 5976.0900 2213.3667 856.2467 13.46 16.66

Sheet 7 of 8
18.00 450 45.72 1284.3700 856.2467 5976.0900 2213.3667 856.2467 14.92 19.05
20.00 500 50.8 1284.3700 856.2467 5976.0900 2213.3667 856.2467 16.37 20.62
24.00 600 60.9 1284.3700 856.2467 5976.0900 2213.3667 856.2467 19.26 24.61

Sheet 8 of 8

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