Schedule 80 Pipe Thickness in mm, Dimensions & Pipe Chart

Schedule 80 Pipe is a standardized pipe wall-thickness designation used for various piping products. For steel and stainless steel pipe, dimensional requirements are covered by standards such as ASME B36.10M and ASME B36.19M. Schedule 80 thermoplastic pipes such as PVC and CPVC use their own applicable dimensional and product standards.

Whether you are searching for schedule 80 pipe thickness in mm, sch 80 pipe dimensions, 80 NB pipe dimensions, 2 inch schedule 80 pipe thickness in mm, or looking to understand the difference between Schedule 40 vs Schedule 80, this guide provides complete information including dimensions, thickness charts, weight tables, applications, materials and buying recommendations.

The following chart shows standard Schedule 80 pipe thickness in mm according to ASME B36.10M and ASME B36.19M. These Schedule 80 pipe dimensions are widely used for carbon steel, stainless steel, alloy steel, PVC, CPVC and UPVC.

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Schedule 80 Pipe is a standardized pipe wall thickness classification defined by the American Society of Mechanical Engineers (ASME). The word "Schedule" refers to the wall thickness of a pipe rather than its outside diameter.

A Schedule 80 pipe generally has a thicker wall than a Schedule 40 pipe of the same nominal size, while the outside diameter remains standardized for the applicable steel pipe dimensional system. The thicker wall can provide greater pressure capacity, but the allowable pressure depends on material grade, temperature, dimensions, and the applicable design code.

Schedule 80 piping is commonly used in oil & gas, chemical processing, power plants, pharmaceutical facilities, marine industries, fire protection systems, pressure piping, and process engineering applications.

SCH stands for Schedule, which is the standardized designation used to define pipe wall thickness.

The schedule number does not represent the outside diameter. Instead, it indicates the wall thickness relative to the pipe size. As the schedule number increases, the wall thickness generally becomes greater.

The following chart shows commonly referenced Schedule 80 pipe thickness in mm for steel and stainless steel pipe dimensions covered by ASME B36.10M and ASME B36.19M. For a given nominal pipe size, Schedule 80 generally has a thicker wall than Schedule 40, resulting in a smaller inside diameter. Pressure capacity must be determined from the material, temperature, dimensions, and applicable design code.

These Schedule 80 pipe dimensions are widely used for carbon steel, stainless steel, alloy steel, PVC, CPVC, and UPVC piping systems. Always verify the required dimensions and pressure ratings with the applicable ASME standard before selecting a pipe for your application.

The Schedule 80 pipe dimensions chart provides the standard outside diameter (OD), approximate inside diameter (ID), and wall thickness for commonly used steel pipe sizes. For a given nominal pipe size, the thicker Schedule 80 wall results in a smaller inside diameter than Schedule 40. Pressure capacity depends on the material, temperature, dimensions, and applicable design code.

These Schedule 80 pipe dimensions are based on ASME B36.10M and ASME B36.19M standards and are commonly used for carbon steel, stainless steel, alloy steel, PVC, CPVC, and UPVC piping systems across industrial, commercial, and high-pressure applications.

The 2 inch Schedule 80 pipe is one of the most commonly used heavy-wall pipe sizes for industrial applications requiring greater wall thickness and pressure capacity, subject to material and design conditions. It is widely used in chemical processing plants, oil & gas facilities, power plants, compressed air systems, water treatment plants, and process piping systems. According to ASME standards, a 2 inch Schedule 80 pipe has an outside diameter of 60.3 mm and a wall thickness of 5.54 mm.

Due to its thicker wall construction, the 2 inch Schedule 80 pipe offers greater strength and pressure-handling capability than Schedule 40 pipe while maintaining the same outside diameter.

Many engineers, contractors, and buyers search for 80 NB to inch or DN80 to inch when selecting industrial piping. In standard pipe sizing, 80 NB (Nominal Bore) is equivalent to a 3 inch pipe. Although the nominal bore is 80 mm, the actual outside diameter is standardized according to ASME pipe dimensions.

80 NB = 3 Inch Pipe

The standard conversion details are given below:

• DN80 ≈ 3 Inch
• 80 NB Outside Diameter (OD) = 88.9 mm
• Schedule 80 Wall Thickness = 7.62 mm
• Approx. Inside Diameter (ID) = 73.7 mm

The 80 NB to 3 inch nominal size relationship is commonly used for industrial pipe sizing. Actual outside diameter and wall thickness should be verified against the applicable material and dimensional standard, particularly when comparing steel pipe with thermoplastic Schedule 80 products.

The following table shows the standard dimensions for an 80 NB Schedule 80 pipe. These dimensions are based on ASME B36.10M and ASME B36.19M standards and are widely used in industrial piping systems.

The 80 NB Schedule 80 pipe is commonly used in high-pressure piping applications across oil & gas, petrochemical, power generation, water treatment, and process industries due to its heavy wall construction and excellent mechanical strength.

The 80 NB pipe weight depends on the material grade, wall thickness, manufacturing process, and applicable tolerances. Since 80 NB is equivalent to a 3-inch nominal pipe size, the weight per meter varies slightly between carbon steel and stainless steel pipes. The following values are approximate and may differ based on the relevant ASTM or ASME standard.

The main difference between Schedule 40 and Schedule 80 pipe is wall thickness. For the same nominal pipe size, the outside diameter is generally the same, while Schedule 80 has a thicker wall and therefore a smaller inside diameter. The increased wall thickness also results in higher pipe weight and can provide greater pressure capacity, depending on the material, temperature, size, and applicable design requirements.

Schedule 80 PVC pipe is widely used in industrial piping systems that require higher pressure resistance than Schedule 40 PVC. While both schedules have the same outside diameter, Schedule 80 PVC features a thicker wall for improved strength, durability, and long-term performance in demanding applications.

Common Available Sizes

UPVC, CPVC, and PVC Schedule 80 pipes are selected based on operating temperature, chemical compatibility, and fluid handling requirements. These materials offer excellent corrosion resistance, making them suitable for water supply, chemical processing, and industrial piping systems.

Schedule 80 PVC pipe is a thermoplastic pipe designation used for applications requiring greater wall thickness than Schedule 40 PVC. Its dimensions, pressure ratings and temperature limitations are governed by the applicable PVC product standard and manufacturer data, not by ASME B36.10M or B36.19M steel pipe dimensions.

Schedule 80 pipes are used in applications where the required material, wall thickness, pressure capacity, temperature range, and applicable design code call for this pipe schedule. Common applications include process piping, oil & gas, petrochemical, chemical processing, power generation, water treatment, and other industrial systems.

Schedule 80 pipe has a thicker wall than lighter pipe schedules for the same nominal pipe size. This provides a greater wall cross-section and can offer increased mechanical robustness and pressure capacity potential, depending on the material, pipe size, temperature, and applicable design requirements.

The actual performance benefits depend on the selected material, product specification, operating conditions and applicable design requirements.

Schedule 80 pipe dimensions and product requirements are specified through applicable dimensional and material standards. ASME B36.10M covers dimensions for welded and seamless wrought steel pipe, while ASME B36.19M covers welded and seamless wrought stainless steel pipe. Product standards such as ASTM A53, ASTM A106, ASTM A312, ASTM A358, ASTM A790, and ASTM A928 define requirements for specific pipe products.

Schedule 80 pipe offers significantly higher pressure resistance than Schedule 40 because of its thicker wall construction. However, the exact pressure rating depends on pipe size, material grade, operating temperature, and the applicable design code.

Schedule 80 pipes are available in a wide range of nominal pipe sizes. The table below shows commonly used NPS and NB size relationships for industrial pipe sizing. Actual availability, outside diameter, and wall thickness depend on the applicable material and product standard.

Schedule 80 pipes are available in various manufacturing methods and material grades to meet the requirements of different industrial applications. The selection depends on operating pressure, temperature, corrosion resistance, and project specifications.

Schedule 80 pipes are supplied with different end preparations to suit various installation methods, including welding, threading, and mechanical connections.

Schedule 80 pipe can be inspected and tested according to the applicable ASTM or other product specification, purchase requirements, and customer inspection plan. Testing may include dimensional inspection, hydrostatic testing, PMI, ultrasonic testing, hardness testing, flattening testing, visual inspection, and other applicable examinations.

Schedule 80 pipes can be packed according to the product type, destination, transportation method and customer requirements. Export orders can include end protection, bundle packing, waterproof wrapping, wooden cases, or other agreed packaging arrangements.