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Round up to the nearest nominal pipe size (NPS) and standard wall thickness schedule (e.g., Schedule 40, Schedule 80). Pressure Drop Calculations Pressure drop caused by friction (
This shows that before you even get to hydraulics and sizing, a solid understanding of the relevant codes, like ASME B31.3, is essential. You can see this structure in courses like the "Advance Course II ASME B31.3" offered by EPCLand, which is organized into modules covering the code's scope, material selection, and stress analysis before moving to application.
Size a seamless carbon steel pipe (ASTM A106 Grade B) to transport water at 25∘C25 raised to the composed with power C from a processing unit to a storage tank. Design Pressure ( ): Design Temperature: 50∘C50 raised to the composed with power C Target Liquid Velocity: (Pump discharge) Corrosion Allowance ( ccorrc sub c o r r end-sub ): Mill Tolerance: Step 1: Hydraulic Diameter Selection Using the continuity equation ( ), solve for inner diameter ( Dicap D sub i
If you're looking for even more resources, here are some strategies: Round up to the nearest nominal pipe size
≤482∘Cis less than or equal to 482 raised to the composed with power C 900∘F900 raised to the composed with power F Accounting for Mechanical Tolerances and Corrosion
[ Low Diameter ] [ High Diameter ] +-------------------------+ +-------------------------+ | High Friction Loss | | Low Friction Loss | | High Pumping Cost | | Low Pumping Cost | | Low Capital Cost (CAPEX) | High Capital Cost (CAPEX) +-------------------------+ +-------------------------+ \ / \ / v v [ Standard Economic Velocity Guidelines ] Velocity Guidelines by Service
tm=PD2(SEW+PY)+At sub m equals the fraction with numerator cap P cap D and denominator 2 open paren cap S cap E cap W plus cap P cap Y close paren end-fraction plus cap A : Internal Design Pressure : Outside Diameter : Allowable Stress of Material : Quality Factor : Weld Joint Strength Reduction Factor : Coefficient (temperature-dependent) Size a seamless carbon steel pipe (ASTM A106
If you are looking for a PDF on this topic, ensure it covers the following three pillars.
value is rounded up to the nearest commercial pipe schedule (e.g., Schedule 40, 80, 160). 5. Component Pressure Ratings and Flange Classes
hf=f⋅(LD)⋅(V22g)h sub f equals f center dot open paren the fraction with numerator cap L and denominator cap D end-fraction close paren center dot open paren the fraction with numerator cap V squared and denominator 2 g end-fraction close paren Friction Factor ( Common for water
A comprehensive PDF will also include the rule-of-thumb equation for optimal liquid pipe diameter in inches: $D = \sqrt\textFlow/10$, where Flow is in gallons per minute.
Look for documents that specifically mention ASME B31.3 and ASME B16.5 .
Common for water, hydrocarbons, and non-corrosive service.
