| Applies To | |||
| Product(s): | AutoPIPE, | ||
| Version(s): | All | ||
| Area: | Libraries | ||
| Original Author: | Bentley Technical Support Group |
Problem:
What references were used to create AutoPIPE's code and non-code material libraries?
Solution:
Please see the following AutoPIPE help section:
Help > Contents> Contents Tab> Reference Information> Libraries>
A. Standard Pipe Materials (find description with reference to Thermal Exp Coeff &
Young's Mod).
B. Code Dependent Pipe Materials (find Yield Stress & Allowable Stress code ref. including
a reference to the Standard Pipe Material listing above).
Example #1:
what reference was used to create the material library for ASME B31.3 - 2010, A53-A:
From the Code Dependent Pipe Materials, find the following:
Use CS, and open the same code year Standard Pipe Material library to find the following:
Answer:
Yield Stress values were taken from ASME IID
Allowable Stress value were taken from ASME B31.3-2010
Thermal Expan. Coef. values were taken from ASME B31.3-2010
Young's Modulus values were taken from ASME B31.3-2010
Notes:
1. click here to see details on how to make changes to AutoPIPE's material library file.
2. When validating the AutoPIPE library data against the reference, be sure to check the entire reference as their can be multiple entries for the same material.
Example,
According to AutoPIPE material Library, ASME B31.3-2012, A312-TP321, min Yield = 30 ksi, Ultimate = 75 ksi
ASME IID, Material data shows, min Yield = 25 ksi, Ultimate = 70 ksi. However, upon looking further down the reference, there is another entry for the exact same material based on a different wall thickness:
3. Why do some material values not match code values for specified wall thickness?
Example:
Code = ASME B31.3 - 2012,
Material = A312-TP321,
Wall Thickness = >10 mm ,
Reference = ASME 2010 Sec. 2 Part D
Cold Tensile Strength = 485 MPa
Cold Yield Strength = 170 MPa,
Reference = AutoPIPE library
Cold Ultimate Strength = 517.1 MPa
Cold Yield Strength = 206.8 MPA
Question:
Why is Yield Strength and Tensile so different?
Answer:
The values for yield and tensile strength for wall thickness less than 3/8" are not all available in our library. Avoidance on this would be to enter minimum and ultimate values manually based on the thickness of the pipeID, This issue has been logged under :
TFS-D328259: B31.3 Material Library: Allow minimum yield and ultimate strength based on pipe thickness
Example #2:
Question:
what reference was used to create the material library for ASME B31.1 - 2014, A335-P2?
From the Code Dependent Pipe Materials, find the following:
Use LC, and open the same code year Standard Pipe Material library to find the following:
Answer:
Yield Stress values were taken from ASME B31.1 - 2014
Ultimate Stress values were taken from ASME B31.1 - 2014
Allowable Stress value were taken from ASME B31.1 - 2014
Thermal Expan. Coef. values were taken from ASME B31.1 - 2014
Young's Modulus values were taken from ASME B31.1 - 2014
Confirm values and reference information:
Step A. Scan Spec and Material Library for default values using procedure here:
Step B: Open reference source mentioned above and search for relevant tables / figures as needed. In this case see Table A1, B, & C
Step C. Manually compare reference information to AutoPIPE Library files and note that the data is exactly the same. Remember if you are using a non-English unit, the values may differ slightly (see why here).
Example #3:
Question:
What reference was used to create the material library for ASME B31.1 - 2014, A335-P92?
From the Code Dependent Pipe Materials, find the following:
Use UC1, and open the same code year Standard Pipe Material library to find the following:
Answer:
Yield Stress values were taken from ASME B31.1 - 2014
Ultimate Stress values were taken from ASME B31.1 - 2014
Allowable Stress value were taken from ASME B31.1 - 2014
Thermal Expan. Coef. values were taken from T92/P92 Book, Vallourec & Mannesmann Tubes (2000)
Young's Modulus values were taken from T92/P92 Book, Vallourec & Mannesmann Tubes (2000)
Example #4:
Question:
What reference was used to create the material library for HDPE-M11.src ?
Answer:
From the Code Dependent Pipe Materials, find the following:
This would imply that the material data used to construct HDPE-M11.src was from ASME ASME CC N-755-1 (2011) - 50 year.
Excerpt from the code:
Note, AutoPIPE help to be updated with this information
Example #5:
Question:
What reference was used for ASME B31.8 2020, Thermal Expansion Coefficient?
Answer:
In this instance, refer to AutoPIPE help for Library> Standard Pipe Material> B318-20.LIB:
Find that ASME B31.3 - 2020 Table C-1 was used as the reference for all Thermal Expansion Coefficient values in this library.
Question: Why was ASME B31.8 2020 Table 832.2-1 Thermal Expansion not used?
Answer: The development team chose to use ASME B31.3 2020 reference because of the temperature range was much greater than in Table 832.2-1:
Table 832.2-1: -125 to 450 deg F
ASME B31.3 2020: -325 to 1400 deg F