These fittings have been used over 50 years in piping/ducting systems and they were around when A. R. C. Markl’s did his testing program in 1950’s. Some crotch plated branch fittings are shown in the Piping Handbook ‘Design of Piping Systems’ published in the 1950’s by M. W. Kellogg Ltd. This handbook was considered an authoritative source of information for the piping engineer of that era. However, these crotch plated branch fittings were not part of Markl’s fatigue testing programme, thus missed out of being part of ASME B 31 series SIF definition.
Conclusion
SIFs calculated using the above methodology are acceptable to be used in flexibility analysis in design, in accordance with ASME B31.3.
SIFs calculated using the above methodology are acceptable to be used in flexibility analysis in design, in accordance with ASME B31.3.
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Safety valve ope
Answer:
Use the same modeling technique as used in the following AutoPIPE help section:
Help > Contents> Contents Tab> Modeling Approaches> Modeling Approaches> Vessels
In this case you will need to provide the DX, DY, and DZ. to both Pipe #1 and Pipe #2 connection locations.
Procedure:
1. Move cursor to header pipe node point (ex. A05)
2. Convert Node into a Tee
3. Insert new branch segment (ex. B) on tee (ex. from A05), extend new piping to Pipe #1 connection location (ex. B01), should be on the outside surface of the header pipe.
4. Insert additional node points on segment piping as needed.
5. Select the piping inside of the header pipe (ex. A05 to B01). Insert> Rigid Options Over Range> Include Weight - OFF, Include Thermal Expansion - ON. press OK button to close dialog screen.
6. Select the header node point, Insert Xtra Data> Joint type and user SIF = user defined, "Override all SIF's at this point" - Checked ON.
Use the same modeling technique as used in the following AutoPIPE help section:
Help > Contents> Contents Tab> Modeling Approaches> Modeling Approaches> Vessels
In this case you will need to provide the DX, DY, and DZ. to both Pipe #1 and Pipe #2 connection locations.
Procedure:
1. Move cursor to header pipe node point (ex. A05)
2. Convert Node into a Tee
3. Insert new branch segment (ex. B) on tee (ex. from A05), extend new piping to Pipe #1 connection location (ex. B01), should be on the outside surface of the header pipe.
4. Insert additional node points on segment piping as needed.
5. Select the piping inside of the header pipe (ex. A05 to B01). Insert> Rigid Options Over Range> Include Weight - OFF, Include Thermal Expansion - ON. press OK button to close dialog screen.
6. Select the header node point, Insert Xtra Data> Joint type and user SIF = user defined, "Override all SIF's at this point" - Checked ON.
7. Select node point on surface of pipe where the connection is made, (ex. B01), Insert Xtra Data> Joint type and user SIF, enter the correct SIF for the connection point, and again, "Override all SIF's at this point" - Checked ON.
8. Repeat steps #3 - #7 for each additional pipe to be connected at the same location (ex. A05).
9. Move to next header node point and repeat steps #1 - #8 for all points allong the header to have more that 1 pipe connection that is offset from the normal position.
8. Repeat steps #3 - #7 for each additional pipe to be connected at the same location (ex. A05).
9. Move to next header node point and repeat steps #1 - #8 for all points allong the header to have more that 1 pipe connection that is offset from the normal position.
Pipe Stress Analysis
PSA Piping performs Pipe Stress Analysis based on ASME codes (American Boiler and Pressure vessel). ASME codes cover the design, analysis, manufacturing and inspection of pressure vessels, piping and supporting structures. It represents a complete set of rules for the analysis of the mechanical components too.
PSA Piping performs Pipe Stress Analysis based on ASME codes (American Boiler and Pressure vessel). ASME codes cover the design, analysis, manufacturing and inspection of pressure vessels, piping and supporting structures. It represents a complete set of rules for the analysis of the mechanical components too.