AS4041 Straight InternalAS4041 PRESSURE PIPING - ALLOWABLE
DESIGN PRESSUREWeld Joint Factor (AS4041 Table 3.12.2 or
D12)e1.00Product of e x M not less than 0.7Class Design Factor
(AS4041 Table 3.12.3)M1.00e x M1Design Temperature, CT525Weld Joint
Strength Reduction Factor (AS4041 Table 3.12.5)W0.975Material
Design Strength, MPa (AS4041, Appendix D)f82.68Pipe Outside
Diameter from Pipe Charts, mmD273.2Nominal Wall Thickness from Pipe
Charts, mmtm12.77Manufacturing TolerancesManufacturing Tolerance (
%)12.5Aust Pipes 10%; American Pipes 12.5%Corrosion Allowance,
mmG1.6Depth of Threading, Grooving or Machining, mm0.0Pressure
Design Wall Thickness, mmtf9.57Maximum Allowable Design Pressure,
MPaMADP5.86AS4041 PRESSURE PIPING - REQUIRED PRESSURE DESIGN WALL
THICKNESSWeld Joint Factor (AS4041 Table 3.12.2 or D12)e1.00Product
of e x M not less than 0.7Class Design Factor (AS4041 Table
3.12.3)M1.00e x M1.0Design Temperature, CT525.00Weld Joint Strength
Reduction Factor (AS4041 Table 3.12.5)W0.975Material Design
Strength, MPa (AS4041, Appendix D)f82.68Pipe Outside Diameter from
Pipe Charts, mmD273.2Manufacturing Tolerance ( %)12.5Manufacturing
TolerancesCorrosion Allowance, mmG1.6Aust Pipes 10%; American Pipes
12.5%Depth of Threading, Grooving or Machining, mm0.0Design
Pressure, MPap5.82Pressure Design Wall Thickness, mmtf9.51Required
Wall Thickness (including allowances), mmtm12.70Therefore Choose
DN250 S/S pipe will a nominal thickness > 12.7 mm
ASME B31.3 Straight InternalASME B31.3 PROCESS PIPING -
ALLOWABLE DESIGN PRESSUREWeld Joint Quality Factor (ASME B31.3
Table 302.3.4)Ej1.00Seamless ASTM A312 TP304Coefficient Y (ASME
B31.3 Table 304.1.1)Y0.40Design Temperature, CT525975FWeld Joint
Strength Reduction Factor (ASME B31.3 Cl. 302.3.5(e))W0.975Material
Allowable Stress, MPa (ASME B31.3 Table A-1M)S82.6812 ksiPipe
Outside Diameter from Pipe Charts, mmD273.210.75"Nominal Wall
Thickness from Pipe Charts, mmtm12.77Manufacturing
TolerancesManufacturing Tolerance ( %)12.5Aust Pipes 10%; American
Pipes 12.5%Corrosion Allowance, mmc1.6Depth of Threading, Grooving
or Machining, mm0.0Pressure Design Thickness, mmt9.59Maximum
Allowable Internal Design Gauge Pressure, MPaMADP5.82ASME B31.3
PROCESS PIPING - REQUIRED PRESSURE DESIGN WALL THICKNESSWeld Joint
Quality Factor (ASME B31.3 Table 302.3.4)Ej1.00Seamless ASTM A312
TP304Coefficient Y (ASME B31.3 Table 304.1.1)Y0.40Design
Temperature, CT525975FWeld Joint Strength Reduction Factor (ASME
B31.3 Cl. 302.3.5(e))W0.975Material Allowable Stress, MPa (ASME
B31.3 Table A-1M)S82.6812 ksiPipe Outside Diameter from Pipe
Charts, mmD273.210.75"Manufacturing Tolerance ( %)12.5Manufacturing
TolerancesCorrosion Allowance, mmG1.6Aust Pipes 10%; American Pipes
12.5%Depth of Threading, Grooving or Machining, mm0.0Design
Pressure, MPaP5.82845 psiPressure Design Thickness,
mmt9.580.377inchesMinimum Required Thickness (including
allowances), mmtm12.770.5024465582inchesTherefore Choose DN250 S/S
pipe will a nominal thickness > 12.77 mm
AS4041 Bend InternalAS4041 PRESSURE PIPING - REQUIRED PRESSURE
DESIGN WALL THICKNESS FOR BENDSWeld Joint Factor (AS4041 Table
3.12.2 or D12)e1.00Product of e x M not less than 0.7Class Design
Factor (AS4041 Table 3.12.3)M1.00e x M1.0Design Temperature,
CT525.00Weld Joint Strength Reduction Factor (AS4041 Table
3.12.5)W0.975Bend Radius, measured to pipe centreline,
mmR11270Material Design Strength, MPa (AS4041, Appendix
D)f82.68Pipe Outside Diameter from Pipe Charts,
mmD273.2Manufacturing Tolerance ( %)12.5Manufacturing
TolerancesCorrosion Allowance, mmG1.6Aust Pipes 10%; American Pipes
12.5%Depth of Threading, Grooving or Machining, mm0.0Design
Pressure, MPap5.82"I" at the IntradosI1.060"I" at the
ExtradosI0.951Pressure Design Wall Thickness @ Intrados,
mmtf8.99Problem with AS4041 formula compared to ASME B31.3
formula.Pressure Design Wall Thickness @ Extrados, mmtf9.98The
intrados should get thicker and the extrados thinner.Required Wall
Thickness @ Intrados, mmtm12.10As thickness is "lost"during the
bending process, it would be normalRequired Wall Thickness @
Extrados, mmtm13.24to multiply the required wall thickness at the
extrados by a factor of1.1 to 1.125 dependent upon how "tight"the
bend radius is. The resultingvalue will give the nominal thickness
of pipe required for bending.
ASME B31.3 Bend InternalASME B31.3 PROCESS PIPING - REQUIRED
PRESSURE DESIGN WALL THICKNESS FOR BENDSWeld Joint Quality Factor
(ASME B31.3 Table 302.3.4)Ej1.00Coefficient Y (ASME B31.3 Table
304.1.1)Y0.40Design Temperature, CT525.00Weld Joint Strength
Reduction Factor (ASME B31.3 Cl. 302.3.5(e))W0.975Bend Radius,
measured to pipe centreline, mmR11270Material Allowable Stress, MPa
(ASME B31.3 Table A-1M)S82.68Pipe Outside Diameter from Pipe
Charts, mmD273.2Manufacturing Tolerance ( %)12.5Manufacturing
TolerancesCorrosion Allowance, mmG1.6Aust Pipes 10%; American Pipes
12.5%Depth of Threading, Grooving or Machining, mm0.0Internal Gauge
Pressure, MPaP5.82"I" at the IntradosI1.060"I" at the
ExtradosI0.951Pressure Design Thickness @ Intrados,
mmt10.14Pressure Design Thickness @ Extrados, mmt9.13Required Wall
Thickness @ Intrados, mmtm13.42As thickness is "lost"during the
bending process, it would be normalRequired Wall Thickness @
Extrados, mmtm12.26to multiply the required wall thickness at the
extrados by a factor of1.1 to 1.125 dependent upon how "tight"the
bend radius is. The resultingvalue will give the nominal thickness
of pipe required for bending.
Sheet2
Sheet3