The allowable stress in the pressure vessel code has changed for Section VIII, Div 1 Pressure Vessels and Section I Boilers. The change is already in effect for most materials via Code Cases, and will be changed in Section II of the Code for all materials soon. This creates the opportunity for...
"Hi Halket (Mechanical)
What is your PRESSURE VESSEL application software chose?"
Over the last 25+ years, I have used virtually all of the US programs (though some of them long ago), including DISASU, APV, CodeCalc and TowerCalc, Compress, IRIS, ProVessel, etc.
Personally, I really...
Sorry, but I respectfully disagree with the strong referral to Compress. I find the program both cumbersome and illogical (NOT a Spock thing) in input and output. The HTML report prints across pages without any planning or reason. It simply splits calculations in the middle and resumes on the...
The difference is in the material. Carbon steel factors to 0.2833 lbs/in3 (40.8 lbs/ft3). Stainless steel is 0.2857 lbs/in3 (41.1408 lbs/ft3).
Weight CS: Length x width x thick x 0.2833
Weight SS: length x width x thick x 0.2857
(Above in US units)
Pressure is defined as force per unit area.
Atmospheric Pressure –
The weight of a column of air, one square inch in cross
section and extending from the earth to the upper level
of the blanket of air surrounding the earth. This air
exerts a pressure of 14.7 pounds per square inch at sea...
Q1) "Shell material: 32mm thick, A 516 gr70 plate.
If I procure normalised plate, is it required to carry out
any SR / normalising after rolling prior to welding?"
A1) No material treatment is required PRIOR to welding.
Q2) "Is it mandatory as per code to order ultrasonically...
The minimum internal projection is taken in the plane being considered. For example, if you were to take a 'cut' of a vertical tower (looking down), the shell would be curved (to the diameter). For this purpose, lets assume your nozzle has a 1/2" (12mm) internal projection on the 'short...
The 'weephole' serves several purposes:
1) By threading the hole (NPT), the fabricator can thread a test gauge for the 'air/soap' test (usually hold to 15 psig) to check for leakage.
2) The hole serves as an 'indicator' (weep) in the event of a subsequent minimal (pinhole) failure of the...
