Hello!
To calculate the minimum size of attachment welds for nozzles and flange to nozzle neck welds (UW-16 and UW-21, respectively), is "tn" defined as the nominal thickness of nozzle wall minus corrosion allowance minus 12.5%tn of mill tolerance (when pipe is used)?
Thank you!
Hello!
When nozzle thickness is calculated in many examples on Appendix L, the efficiency equals one regardless of the type of joint or its degree of Radiographic Examination. I would like to know why it is so?
I understand that if a joint between the shell and a nozzle (Joint Category D) is...
I am designing a vessel that is supposed to collect (by gravity) condensate containing about 38 ppm of H2S. Once collected, this condensate will be displaced from the vessel to the flare using Nitrogen at 100 psi.
Would you consider this vessel to be on lethal service?
Thanks for your help...
When vessels are to contain lethal substances, UW-2 (1)(b) says that all joints of Categories C shall be:
Type Nº1 (Butt joints as attained by double-welding....) or
Type Nº2 (Single-welded butt joint with backing strip other than those included under 1 ) of Table UW-12.
Does this imply that I...
