What are K factors for pipe fittings?

Loss coefficients K: gate valve fully open = 0.1, globe valve = 10, ball valve = 0.05, 45° elbow = 0.4, 90° elbow = 0.9, standard tee = 1.5-2.0.

How do I convert head loss to pressure drop?

ΔP = ρ·g·h_L. For water (ρ=1000 kg/m³), 1 m head = 9810 Pa = 0.098 bar = 1.42 psi.

What is equivalent length method for fittings?

Equivalent length L_eq = K·D/f represents fittings as additional pipe length. Sum actual pipe length plus equivalent lengths of all fittings to find total Darcy-Weisbach length.

Pressure Drop Calculator

Calculate total pressure drop including pipe friction and minor losses: ΔP = f·(L/D)·(ρV²/2) + Σ(K·ρV²/2). K values: gate valve 0.1, ball valve 0.05, 90° elbow 0.9, tee 1.5.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)

σy — Normal Stress Y (MPa)

τxy — Shear Stress (MPa)

⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.

How to Use

Enter the values for the patient or scenario you are assessing. Calculate total pressure drop including pipe friction and minor losses: ΔP = f·(L/D)·(ρV²/2) + Σ(K·ρV²/2). K values: gate valve 0.1, ball valve 0.05, 90° elbow 0.9, tee 1.5. Use the pressure drop result to inform your clinical assessment.

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Frequently Asked Questions

What are K factors for pipe fittings?

How do I convert head loss to pressure drop?

What is equivalent length method for fittings?