Double line

Test Your Knowledge

Double Line Drawing Quiz

Instructions: Choose the best answer for each question.

1. What is the primary purpose of double line drawings in the oil and gas industry?

a) To illustrate the flow of fluids in a pipeline. b) To show the detailed physical layout of a piping system. c) To depict the construction timeline of a pipeline project. d) To represent the pressure levels within a pipeline.

2. Which of the following is NOT typically included in a double line drawing?

a) Center line b) Outer diameter of the pipe c) Material specifications of the pipe d) Pipe support locations

3. What is the main advantage of double line drawings over single-line drawings?

a) They are easier to understand for non-technical personnel. b) They provide a more comprehensive representation of the piping system. c) They are less time-consuming to create. d) They are suitable for representing pipelines of any size.

4. Which of the following is NOT a practical application of double line drawings?

a) Design and engineering of pipelines b) Construction and installation of pipelines c) Development of marketing strategies for oil and gas products d) Maintenance and troubleshooting of pipelines

5. Double line drawings are typically used for pipelines with diameters of:

a) 2 inches or larger b) 6 inches or larger c) 10 inches or larger d) 14 inches or larger

Double Line Drawing Exercise

Scenario:

You are tasked with designing a section of a pipeline that will carry natural gas from a processing facility to a distribution station. The pipeline will be 20 inches in diameter and run for 1000 meters. Using the information provided below, create a simple double line drawing for this section of the pipeline.

Information:

• Pipe Material: Steel
• Pipe Supports:
  • Concrete support every 50 meters
• Valves:
  • One isolation valve located 200 meters from the processing facility.
• Fittings:
  • Two 90-degree elbows, one located 300 meters from the processing facility and the other 600 meters from the processing facility.

Instructions:

1. Draw the center line of the pipeline.
2. Indicate the outer diameter of the pipe using a second parallel line.
3. Represent the pipe supports, valve, and fittings using appropriate symbols.
4. Label the distance markers along the pipeline.

Remember:

• Use a scale to ensure accurate representation of distances.
• Refer to standard symbols for pipe supports, valves, and fittings.

Techniques