It is very difficult (almost impossible) to mention the calculation formula in this site.
If you do not have a Calculation Software (ie, COMPRESS - covered with saddles and skirt, and lugs), please use the most popular reference books below.
1. Eugene F. Megyesy, Pressure Vessel Handbook, Pressure Vessel Handbook Publising Inc.
2. Henry H. Bednar, Pressure VEssel Design Handbook, Van Nostrand Reinhold Company
3. LLoyd E. Brownell, Process Equipment Design, John Wiley & Sons, Inc.
Alternatively you can request the calculation to "Pressure Vessel Design Company" in Korea.
If you do not have a Calculation Software (ie, COMPRESS - covered with saddles and skirt, and lugs), please use the most popular reference books below.
1. Eugene F. Megyesy, Pressure Vessel Handbook, Pressure Vessel Handbook Publising Inc.
2. Henry H. Bednar, Pressure VEssel Design Handbook, Van Nostrand Reinhold Company
3. LLoyd E. Brownell, Process Equipment Design, John Wiley & Sons, Inc.
Alternatively you can request the calculation to "Pressure Vessel Design Company" in Korea.
Hope it helps.
Thomas Eun in Canada