Create app.py

app.py

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+import streamlit as st
+import math
+
+# App title
+st.title("Pipe Sizing Helper")
+st.write("This app suggests pipe sizes for a given flow rate and permissible velocity.")
+
+# Input fields
+flow_rate = st.number_input("Enter Flow Rate (m³/s):", min_value=0.0, step=0.01)
+velocity = st.number_input("Enter Permissible Velocity (m/s):", min_value=0.1, step=0.01)
+
+# Calculate pipe diameter
+if st.button("Calculate"):
+    if velocity > 0:
+        # Pipe diameter formula: D = sqrt(4 * Q / (π * V))
+        diameter = math.sqrt((4 * flow_rate) / (math.pi * velocity))
+        diameter_mm = diameter * 1000  # Convert meters to mm
+        st.success(f"Recommended Pipe Diameter: {diameter_mm:.2f} mm")
+    else:
+        st.error("Velocity must be greater than zero.")
+