Create app.py

app.py

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+import streamlit as st
+import math
+
+# Title and Description
+st.title("🔧 Pipe Sizing Helper")
+st.write("""
+This app helps you determine the required pipe diameter based on the flow rate and fluid velocity.  
+Simply input the flow rate (in cubic meters per second) and velocity (in meters per second) to get the pipe diameter.
+""")
+
+# Sidebar Instructions
+st.sidebar.title("How to Use")
+st.sidebar.write("""
+1. Enter the flow rate of the fluid in m³/s.  
+2. Enter the velocity of the fluid in m/s.  
+3. Click **Calculate** to get the required pipe diameter.  
+4. Reset inputs using the **Clear Inputs** button.
+""")
+
+# User Inputs
+st.subheader("Input Parameters")
+flow_rate = st.number_input("Flow Rate (Q) in m³/s:", min_value=0.0, format="%.6f", step=0.01)
+velocity = st.number_input("Fluid Velocity (v) in m/s:", min_value=0.1, format="%.2f", step=0.1)
+
+# Calculate Button
+if st.button("Calculate"):
+    if flow_rate <= 0:
+        st.error("Flow rate must be greater than zero!")
+    elif velocity <= 0:
+        st.error("Velocity must be greater than zero!")
+    else:
+        # Calculate pipe diameter
+        diameter = math.sqrt((4 * flow_rate) / (math.pi * velocity))
+        diameter_mm = diameter * 1000  # Convert to mm
+        st.subheader("Results")
+        st.write(f"**Required Pipe Diameter:** {diameter:.4f} meters ({diameter_mm:.2f} mm)")
+
+# Reset Inputs
+if st.button("Clear Inputs"):
+    flow_rate = 0.0
+    velocity = 0.0
+    st.experimental_rerun()
+
+# Footer
+st.write("---")
+st.markdown("💡 **Developed by Abdullah**")