Schedule 80 Pipe Dimensions and Size Chart

Schedule 80 Pipe is a thicker-walled pipe than Schedule 40, offering higher pressure and temperature resistance. The diameter of the outside remains constant across schedules, while inside, it shrinks. Schedule 80 Pipe Dimensions are defined by the ASME B36.10 standard.

In the oil, gas, and petrochemical facilities of Saudi Arabia, whether it is transporting fluids and gases through pipes at intense pressure and harsh environments, or moving pressurized water across long distances, the Schedule 80 Pipe remains unbeatable in every demanding industrial operation. Unlike the Schedule 40, the Schedule 80 features a thicker and more durable design that resists collapsing under heavy underground pressure and temperature. Therefore, when purchasing the Schedule 80 Pipe, ensuring the right dimensions and sizes are important to meet specific operational requirements.

What is Schedule 80 Pipe?

Schedule 80 Pipe is an industrial standard that defines the thickness of pipes to handle high-pressure and high-temperature (HPHT) conditions. Schedule 80 features a thicker wall than Schedule 40 to provide enhanced performance and durability in the demanding industrial operations in Saudi Arabia, whether in Jubail Industrial City, Ras Al Khair, Yanbu Industrial City, or Jeddah Industrial City.

If you wonder how thick is Schedule 80 Pipe, wall thickness will vary depending on the nominal pipe size (NPS). This will be stated in accordance with ASME B36.10M standards.

Wall thicknesses according to the ASME B36.10M Schedule 80 Pipe Dimensions:

• 1/2-inch Pipe: 0.147 inches (3.73 mm)
• 1-inch Pipe: 0.179 inches (4.55 mm)
• 2-inch Pipe: 0.218 inches (5.54 mm)
• 3-inch Pipe (DN80): 0.300 inches (7.62 mm)
• 4-inch Pipe: 0.337 inches (8.56 mm)

Schedule 80 Pipe Dimensions and Size Chart

The Schedule 80 Pipe size chart given below lists the standard dimensions for Schedule 80 steel pipes, including NPS, DN, outside diameter, wall thickness, and inside diameter.

Why You Should Care About Schedule 80 Pipe Thickness?

Having an understanding of the Schedule 80 Pipe thickness is important because it directly determines your system’s maximum pressure rating, corrosion allowance, and flow capacity.

• Safe Pressure Handling: Schedule 80 Pipe size is the same, but is thicker by 30% to 55% than Schedule 40 pipes, which is necessary for high-pressure handling.

• Understanding the Inside Hole (ID): Another reason why knowing the thickness is important is that the outside size remains the same, but the inside hole is smaller. This prevents you from buying extras, such as sensors or strainers that can restrict the flow.

• Safe Threading: A thicker wall is mandatory when you are connecting the pipes through groove cutting or threading. It ensures that the connection is highly secured to effectively prevent leaks during high pressure.

• Weight and Clearance: As Schedule 80 is of a higher weight than Schedule 40 Pipes, knowing their exact thickness can help you understand transport requirements.

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Difference Between Schedule 40 Pipe and Schedule 80 Pipe

The table below compares the Schedule 40 and Schedule 80 Pipe on the basis of wall thickness, inside diameter, pressure capability, weight, cost, applications, mechanical strength, materials, and PVC color.

Schedule 80 Pipe Industrial Application in Saudi Arabia

Schedule 80 Pipes in Saudi Arabia are used across various industrial sectors, including oil and gas refineries, petrochemical, power generation, fire protection, and water and desalination.

1. Oil and Gas Refineries

• Application: High-pressure transport lines and steam lines.
• Why: To withstand high pressure, temperatures, and mechanical stress.

2. Petrochemical and Chemical

• Application: Aggressive fluid processing lines.
• Why: Thicker walls are important to ensure resistance to corrosion and damage caused by the harsh chemicals.

3. Power Generation

• Application: Boiler systems and heat exchangers.
• Why: To ensure high structural integrity and safety levels against the steam explosions.

4. Fire Protection

• Application: Industrial fire sprinkler systems and firefighting pipelines.
• Why: High internal pressure capability to ensure reliable water flow during emergencies.

5. Water and Desalination

• Application: Demineralized water and heavy-duty water infrastructure.
• Why: For superior durability and prevention of thread deformation in threaded systems.

How to Measure and Identify Schedule 80 On-Site?

Here is how you measure and identify the Schedule 80 on-site:

1. Look for Markings and Color

• Steel Pipes: Steel pipes come in a darker grey or black carbon finish. It also must have the manufacturer’s stamp.
• PVC Pipes: PVC pipes come in dark grey, while Schedule 40 Pipes come in white.

2. Measure the Outside Diameter (OD)

Use a digital capillary device to measure the outside diameter (OD), or manually by wrapping a tape measure around the circumference, then divide by π (3.14).

3. Measure the Wall Thickness

The outside edge is 3.5 inches wide, and the wall is 0.300 inches thick. If your measurement matches these numbers, it is Schedule 80 Pipe.

4. Rely on the ID Formula

You can also calculate the thickness of the wall by measuring the Inside Diameter (ID) and Outside Diameter (OD) through the following formula: t = OD-ID/2.

• t: Wall Thickness
• OD: Outside Diameter
• ID: Inside Diameter

Conclusion

Schedule 80 Pipe contains thicker walls than Schedule 40, providing enhanced performance in high-pressure and high-temperature (HPHT) operations in Saudi Arabia. Designed specifically for oil and gas refineries, petrochemical, power generation, and fire protection systems, Schedule 80 lives up to the demanding industrial conditions. A Schedule 80 Pipe size chart, including its dimensions, can help you in purchasing the right size as per your operational requirements.

National Oil Groups, in Saudi Arabia, is a trusted supplier of Schedule 80 pipes across the industrial sectors, including oil, gas, power, and marine sectors. Our product is designed to cater to different requirements while maintaining high performance in the long-term. That is what makes us a highly reputable supplier across the GCC region. So, contact us today and get the high-quality Schedule 80 pipes.

Also Read – Why Choosing the Right Oilfield Equipment Matters