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TUTORIALS/ REFERENCES
TUTORIALS/ REFERENCES
How do I understand SCFM? What does it mean physically?
How to convert a SCFM value from one fluid to another?
How to convert a SCFM value for different ambient conditions?
How to convert b/w SCFM/ACFM/mass flow?
How does this get confusing to engineers?
Difference b/w US and imperial gallon and why does this matter?
Flow Rate Through Valves
Whats the difference b/w Cv, Kv, etc?
What does choked flow mean?
How to calculate flow rate through valves?
Flow Rate in Pipes
Flow Rate in Pipes
What are the math models available that can be solved with hand calculations for flow in pipes for incompressible and compressible flow?
Which model should I choose and why?
What limitations/assumptions are baked in? Are these calculations conservative/unconservative?
How about minor losses? How do we include that in with the major losses?
Is it okay to lump all losses or should you do node by node analysis? Is there a clever way to think about this?
Overpressure Protection
Overpressure Protection
What is the difference between a safety valve, relief valve, and safety relief valve?
What does the 3% inlet pressure drop and 10% backpressure mean for relief devices?
What assumptions go into a fire case calculation?
Why is fire sizing often grossly conservative?
Which codes govern PSV sizing vs. installation?
are you required to have pop action safety valves for B31.3 systems?
OPP for Vaporizers
OPP for Vaporizers
Why are vaporizers especially dangerous from an OPP perspective?
What failure modes dominate vaporizer overpressure?
How do blocked outlet and heat input scenarios differ?
Vessel Modeling
Vessel Modeling
How do you model pressure rise from a leak into a closed volume?
How do you model heat input during a fire case?
When does lumped-capacitance break down?
Gas Temperature Changes (JT Effects)
Gas Temperature Changes (JT Effects)
What is the Joule–Thomson effect in plain language?
When does gas cool vs. heat during expansion?
Why does hydrogen behave differently than most gases?
When is assuming isothermal expansion dangerously wrong? To
What can a check valve actually be relied on to do?
What can it not be relied on to do?
Why are check valves not isolation devices?
How does cracking pressure affect system performance?
How do leakage class and backflow rate really matter?
Sizing and Selection
Sizing and Selection
Why does oversized check valves cause chatter?
How does orientation affect performance?
What failure modes dominate in gas service?
What is the difference between droop and lock-up?
Why do regulators behave differently with gases vs liquids?
How does upstream pressure variation affect outlet control?
When do you need a monitor or series regulator setup?
Why do regulators often fail silently?
How does a flat-plate orifice actually measure flow?
What assumptions go into the orifice equation?
When does discharge coefficient matter most?
Why do orifices lose accuracy at low Reynolds numbers?
Selecting Fittings for Gas Service
Selecting Fittings for Gas Service
What makes a fitting suitable for gas vs liquid service?
How do leak paths differ for gases?
Why do torque specs matter more for gases?
SAE J1926 Fittings
SAE J1926 Fittings
What problem does SAE J1926 solve?
How does it differ from NPT and ORB?
Why is it common in high-pressure gas systems?
What are the common failure modes?
What is the difference between MAWP, design pressure, and service pressure?
Why is MAWP not a design target?
How do temperature deratings factor in?
Why do engineers confuse test pressure with operating pressure?
How do particulate size requirements get defined?
Why does oil content matter more than people think?
How does moisture content affect downstream equipment?
How are ISO air quality classes specified?
Dryer Selection Confusion
Dryer Selection Confusion
Why use a desiccant dryer downstream of a refrigerated dryer?
What happens if you don’t?
How do pressure drop and purge losses factor in?
When is this configuration overkill?
What does it mean for a refrigeration system to “balance”?
How do compressor, condenser, and evaporator curves interact?
Why is this an iterative problem?
What assumptions break most spreadsheet models?
What problems is CoolProp actually good at solving?
What inputs are required to avoid garbage outputs?
How do you link CoolProp to Excel safely?
What are the most common unit mistakes?
When should you not use CoolProp?
How do Section III div 1 and div 5 differ?
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