Referring to ENDNOTE 1(at the end) :
"The water may contain additives provided the flash point of the aqueous solution at atmospheric pressure is 185°F
or higher."
Also under U1-Scope:
"(2) For the scope of this Division, pressure vessels are containers for the containment of pressure, either...
The exact elongation calculation is complicated. The inside and outside surfaces will try to elongate differently, so shear stresses may develop, which may try to make the elongation uniform.
Using your formulae (with sign correction in sirgma_r & sigma_theta) in Matlab I get the following...
B 31.1 or B31.3 does not forbid the repair of the root defect of welding. The repaired weld has to undergo NDT as per code, and a qualified welder to be used.
However, it may be difficult to weld a 8" pipe from inside.
As per cl. 6.1.1, the test temperature can be different from those in Table 3, so it can be lower too. But the impact energy values shall not be inferior to values in Table 3.
As per clause 3.1.3, the impact test temperature needs to be specified along with the order.
It is clear from your post that the steam side steam pressure will not exceed the safety limits of the heater. So the steam side safety valve is not required.
Even then a shell side relief will be required. Consider the case when some of the tubes are ruptured. The tube side pressure will be...
In a normal thermal power plant, there is no PCV, and the heating steam sources are uncontrolled extraction points from the steam turbine. On the other hand, for PRV sizing, we used to follow the HEI code.
In your case, you are using a controlled external steam source. As per ASME code, in...
The factor of 1.25 allowed for cyclic thermal loads and 1.2 for occasional loads(B31.1) because these loads are transitory in nature, whereas the sustained load is continuous. As per ASME codes it is allowable to exceed the allowable stress for short periods.
But at low temperature...
It appears this is a huge fan with 302 mm H2O fan head.
TLT fans is a company supplying FD/ID fans for coal power plants which look similar in size and rating.
Howden is another company.
As per table 323.2.2A, up to a thickness of 12.7 mm -55 deg F minimum temperature can be used without impact testing.
For higher thicknesses, both table 323.2.2A and 323.2.2B can be used, in my opinion. The most restrictive minimum temperature should be used for obviating impact tests.
For...
The B31.1 force calculation does not require the flow to be supersonic.
However, as per the same B 31.1 document, the designer has the responsibility to ensure that the results are conservative.
There is a major deviation of your system from the usual safety valve configuration. The...
The paper I cited was authored by P. K. Swamee, who formulated the famous Swamee-Jain friction factor formula.
I have done a preliminary calculation based on your data and above reference as below:
Disclaimer: Please check with your own past experience and reference above before using the same.
1. Since Cat A is not mentioned for angle joints, angle joints can not be used for Cat A welds.
2. Try Non-Mandatory Appendix L for joint efficiencies.
There is a book titled Fatigue of Structures and Materials by Jaap Schijve where a chapter is devoted to corrosion fatigue. You will also get a number of references to published papers there on this subject.
