In this guide, I will be demonstrating how to use Domain-Knowledge Embedded Prompting Technique to calculate the required pipe diameter given flow rate and velocity.

Navigate to [https://chatgpt.com/?model=gpt-4o](https://chatgpt.com/?model=gpt-4o)

Enter this prompt: "*Using the following data and guidelines, calculate the pipe diameter while ensuring compliance with industry standards:*

- *The pipe material is **carbon steel**.*
- *The velocity must be maintained between **1 and 3 m/s** as per fluid transport best practices. The velocity is 2 m/s.*
- *The flow rate is **0.2 m³/s**.*
- *Ensure the calculation adheres to **ASME B31.3** standards for piping design.*

***Requirements:***

1. *Use the formula for pipe diameter:\
   D = sqrt((4 Q) / (pi v))\
   where QQQ is the flow rate and vvv is the velocity.*
2. *Velocity that is compliant with the range of 1–3 m/s. For this use 2 m/s.*
3. *Show all calculations, ensuring consistency in units and alignment with carbon steel piping properties.*
4. *Provide a final pipe diameter that meets both the flow rate and velocity requirements."*

[[By embedding domain-specific knowledge, this technique ensures results align with industry requirements. It’s highly effective for engineering tasks but requires accurate data input.]]

ChatGPT
Calculation for Pipe Diameter
Background

The task is to calculate the pipe diameter for transporting a fluid with a specified flow rate while adhering to the velocity range prescribed by fluid transport best practices and the ASME B31.3 standards for carbon steel piping.

Objectives
Calculate the pipe diameter using the provided formula and ensure compliance with the specified flow rate and velocity requirements.
Provide calculations in a step-by-step manner with all values converted to SI units.
Inputs and Assumptions
Flow rate, 
𝑄
Q: 
0.2
 
m
3
/
s
0.2m
3
/s (given).
Velocity, 
𝑣
v: 
2
 
m
/
s
2m/s (given and within the acceptable range of 1–3 m/s).
Formula for pipe diameter:
𝐷
=
4
⋅
𝑄
𝜋
⋅
𝑣
D=
π⋅v
4⋅Q
	​

	​

Material properties and industry standards: The pipe material is carbon steel, compliant with ASME B31.3.
Calculations

Write the formula:

𝐷
=
4
⋅
𝑄
𝜋
⋅
𝑣
D=
π⋅v
4⋅Q
	​

	​


Substitute the known values into the formula:

𝐷
=
4
⋅
0.2
𝜋
⋅
2
D=
π⋅2
4⋅0.2
	​

	​


Perform the calculations step-by-step:

Calculate the numerator:
4
⋅
0.2
=
0.8
 
m
3
/
s
4⋅0.2=0.8m
3
/s
Calculate the denominator:
𝜋
⋅
2
≈
6.283
 
m
/
s
π⋅2≈6.283m/s
Divide the numerator by the denominator:
0.8
6.283
≈
0.1273
 
m
2
6.283
0.8
	​

≈0.1273m
2
Take the square root:
𝐷
=
0.1273
≈
0.357
 
m
D=
0.1273
	​

≈0.357m

Convert to millimeters for standard piping notation:

𝐷
=
0.357
 
m
×
1000
=
357
 
mm
D=0.357m×1000=357mm
QA/QC Check
Verify units: The flow rate is in 
m
3
/
s
m
3
/s, velocity is in 
m
/
s
m/s, and the calculated diameter is in meters, consistent with SI units.
Confirm compliance with velocity range (1–3 m/s).
Conclusion and Recommendation

The calculated pipe diameter is 357 mm. This diameter ensures compliance with the given flow rate, velocity requirements, and ASME B31.3 standards for carbon steel piping.

References and Attachments
ASME B31.3 Process Piping Code, 2020 Edition.
Formula sourced from fluid transport engineering principles.
4o
Is this conversation helpful so far?

[[Embedding domain knowledge ensures calculations meet specific standards. This technique is perfect for specialized engineering tasks but requires accurate and relevant data. Domain-Knowledge Embedded Prompting combines AI capabilities with industry expertise. Explore our other videos to master more advanced prompting techniques. Subscribe to our Udemy Course to learn more about using AI in you engineering workflow!]]

Chatgpt

This guide is a sample on how to use the Domain-Knowledge Embedded Prompting technique to answer engineering questions using ChatGPT.