WinNozl
contains 4 modules, each priced separately. Each module comes with its
own hardware lock, or can run using firmware, so the locks can be connected
together on the same PC, or each used separately on different PCs.
1. WRC (Welding Research Council) bulletin 107/ASME - this module calculates "local" stresses per WRC 107 standard on the shell of the vessel, tank or pipe. Typically, such local stress analysis is performed to ensure that piping loads will not overstress the vessel wall at the nozzle/vessel junction resulting in cracked welds or damage to the vessel. WRC does not specify stress allowables, only how to calculate stresses. So we have built in to this module as well as in the WRC 297 module, automatic load combinations and stress allowables per ASME Sec. 8, Div. 1 or Div. 2. ASME Sec. 8 is the pressure vessel design code. WRC 107 can handle both spherical and cylindrical shells, with either a hollow attachment (like a nozzle) or solid attachment (like a lug).
2. WRC 297 - same as above, but using WRC 297 method for calculating local stresses. This module also has built-in stress allowables and load combinations per ASME Sec. 8. The main differences between WRC 107 and WRC 297 are that WRC 297 can be used only for cylindrical shells, not spherical shells, and only with a round hollow attachment. Although WRC 297 is limited for those applications, WRC 297 design rules allow stress calculations for thinner wall shells than WRC 107, such as thin walled vessels and tanks. Both WRC 107 and 297 have certain limits of shell diameter vs. attachment diameter, and wall thickness limitations. If a user inputs a value outside of the WRC limits, WinNozl automatically comes up with a warning telling the user which value is outside of the WRC range. More information on WRC standards can be found on www.forengineers.org, the web site for the Pressure Vessel Research Council.
3. API 650 - based on API (American Petroleum Institute) 650 standard Appendix P, it calculates allowable loads on a tank nozzle connection. This is used only for API 650 storage tanks.
4. BS5500 - Based on British Standard 5500 appendix G, it calculates local stresses on cylindrical or spherical shells based on BS 5500 standard. This module is typically used when the pressure vessel is manufactured to BS 5500 standard instead of ASME.