Dear all,
A Korean vendor arguing that steam drum shall be stamped with "S-PART", as it is part of the boiler, shall not be stamp with "S". I think this coming down to the definition of "what is part ?".
Steam drum, which can be either designed per Section VIII or Section I, in my opinion is a...
Dear all,
I have a stainless steel (SS321) vessel with design temperature 1050F, not heavy wall, not cyclic service. In general, do you use re-pad for nozzles ? or use integrally reinforced nozzles due to high temperature ?
(If for low alloy, we do use integrally reinforced, but not sure for...
Dear all,
We will build a new plant in northern USA. The project MDMT is -20F. However a question was raised that years ago there was an extreme cold temperature last about couple of weeks below -20F, says -40F. The question is, shall the MDMT be re-set to -40F just for that rarely extreme...
Dear all,
I have a low alloy 30"-600# ASME B16.47 manway blind with 8" nozzle welded to the blind. Note that the nozzle will have axial force and bending moment acting on the blind too. What is the method to include MAWP and external piping load to calculate the nozzle hub reinforcement to make...
Dear all,
I believe this must have been discussed in the past. I have a 2 1/4Cr-1 Mo vertical vessel with full vacuum at 1100 F (593C). It is beyond the chart to find out allowable "B" value. Then what is the best approach to get the allowable compressive stress ? Thanks in advance for your help.
Dear all,
Normally we put "N&T" as a common term and practice on vessel data sheet for low alloy material. Supplier is offering "Normalized w/Accelerated Cooling & Tempering (NACT)" heat treatment. I see it is acceptable. However, supplier's PQR is showing " N&T" material. Is it necessary to...
