Pipe Wall Thickness Calculation According ASME B31 3 [PDF]

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Index of Pipe wall Thickness Calculation



1



ASME B31.3 # 303. Pressure design of componentes



8



Recommendations for m



2



ASME B31.3. Chapter 1 Part 3. Fluid service



9



ASME B36.10M Schedu ASME B36.19M & ASME Identification



3



Table A-1 ASME B31.3-2002 Basic allowable stresses in tensions for metals Carbon steel pipes and tubes



10



Corrosion Allowance for



11



Appendix M. Guide to cla



4



Table A-1B. ASME B31.3-2002 Basic casting quality factors Ec Table A-1B. ASME B31.3-2002 Basic quality factors for longitudinal weld joints in pipes, tubes, and fittings Ej



12



ASTM A106, API 5L and carbon steel pipes. Pres Ratings. Table of Maxim (kPa), for different pipe s



13 5



Table 304.1.1 .ASME 304.1.1-304.2.1 Y coefficient For t < d/6



ANSI B16.5 - Maximum Non-shock pressure (ps for steel pipe flanges and



14



Sample wall thickness ca



6



ASME B1.20.1 83 Table 2. Basic dimensions of American National Standard Taper Pipe Thread



15



Pressure ratings and ma References



7



ASTM A 106, ASTM A 53 and API 5L Table 9.- Tolerances for Wall Thickness Mill tolerance



Next revision will include stainless s



cjc, Rev. 31.01.2014



Recommendations for minimum thicknesses ASME B36.10M Schedule / Identification ASME B36.19M & ASME B36.10M Schedule / Identification Corrosion Allowance for ASME B31.3 Piping" Appendix M. Guide to classifying fluid services ASTM A106, API 5L and ASTM A 53 Seamless carbon steel pipes. Pressure and Temperature Ratings. Table of Maximum Allowable Pressure (kPa), for different pipe sizes and temperatures ANSI B16.5 - Maximum Press. and Temp. Ratings Non-shock pressure (psig) and temperature ratings for steel pipe flanges and flanged fittings Sample wall thickness calculation Pressure ratings and maximum allowable pressures References



ion will include stainless steel materials



Pag. 1 of 2 Pipe wall thickness calculation according ASME B31.3



2.-Pipe exterior diameter dn = 2 de =



Data Pipe (CS) material (Note 1) Weld joint type (Note1) Nominal diameter Design pressure



in mm



(Note 2)



1 dn =



2



in



2 3



P=



2



Mpa



4



Design temperature



temp =



80



°C



5



Corrosion allowance Thread (Yes/No)



TC = Hilo =



1.59 Yes



mm



6 7



3.-Material allowable stress ASME B31.1,Table A-1 sallow = 2,199



(3a of ASME B31.3 paragraph 304.1.2 (Sheet 1)



(Sheet 3)



API5L Gr. A25 and a longitudinal weld S



ASME B31.3, Tabla A-1B gives E=



(3a)



MPa



(Note 4) type:



The pressure design thickness "t" is calculated according equation



(Note 3)



4.- Quality factor "E" for the given longitudinal weld type Material:



1.-Pressure design thickness



P  dext t dis  2    E  P  Y 



60.3



1



(Sheet 4)



tdis: design thickness by pressure



[mm]



5.- "Y" coefficient for equation (3a) Tabla 304.1.1 should be used for t < d/6 d= 60.3 mm d/6 = 10.05 mm



P: design internal pressure de: pipe exterior diameter s: material allowable stress E: Quality factor Y: coefficient from Table 304.1.1



[Mpa gauge]



ASME 304.1.1-304.2.1, Table 304.1.1. gives for:



[mm] [MPa] [-] [-]



material type: and Temperature: following "Y coefficient" Y= 0.4



Correct. s < d/6 (Note 4) 8



80



ºC (Sheet 5)



In columns "!P" to "W", it is posible to see the calculation



The nine (9) cells in gelb are required inputs



steps. To see these columns, if they are hiddeen, click on the plus sign "+" in the upper teil of the sheet.



The last input (#9) correspomds to the schedule that shall be selected to obtain a thickness larger than the in point #10 calculated minimum required.



To see hidden sheets, - Right click on any sheet-label - click on Unhide



For result checking,see example in sheet "14. Example" Also, see Recommended minimum thicknes in sheet 7



Validation list for thread selection Yes No En columnas P a W, se pueden ver los pasos del cálculo y las notas. Para ver estas columnas, si están ocultas, hacer click en el signo "+", en la parte superior de la hoja.



ASME B31.3 - 2002 - 1



t: P: dext: = E: Y:



Ferritic steel



Austenitic steel Cast iron Sheet 5 Coefficient Y ASME 304.1.1-304.2.1 Table 304.1.1. For t < d/6 t