This reference is intended for engineers, designers, fabricators, estimators, and CAD users checking 20 inch Schedule 10S stainless steel pipe. Use the nominal size, DN designation, outside diameter, wall thickness, inside diameter, and mass data together when reviewing layouts, material takeoffs, support concepts, or fabrication drawings.
For drafting and coordination, distinguish the nominal pipe size from the measured outside and inside diameters. The schedule identifies a wall-thickness series; it does not by itself define the material grade, corrosion allowance, allowable pressure, or complete design basis.
Schedule 10S pipe 20 inch (DN500) is a large-diameter stainless steel pipe size commonly used in piping design, fabrication, drafting, and engineering reference work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 20 Schedule 10S pipe based on ASME B36.19.
20 Inch Schedule 10S Pipe Dimensions
- Nominal Pipe Size (NPS): 20 inch
- Diameter Nominal (DN): DN500
- Outside Diameter (OD): 508 mm
- Wall Thickness: 5.54 mm
- Inside Diameter (ID): 496.92 mm
- Pipe Weight: 68.65 kg/m
- Pipe Weight Filled With Water: 262.48 kg/m
- Reference Standard: ASME B36.19
- Pipe Type: Stainless Steel Pipe
Schedule 10S Pipe 20 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 20 inch | 500 | 508 | 5.54 | 496.92 | 68.65 |
What Does Schedule 10S Mean?
Schedule 10S is a stainless steel pipe schedule covered by ASME B36.19. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness changes with the schedule. The “S” designation is commonly used for stainless steel pipe schedules.
Typical Uses of 20 Inch Schedule 10S Pipe
NPS 20 Schedule 10S pipe is commonly referenced in stainless steel piping systems used in industrial plants, utility lines, water-related systems, food and process facilities, and fabrication work where corrosion resistance and dimensional accuracy are important.
Why Pipe Weight Matters
Pipe weight per meter is useful for transport planning, lifting studies, support design, structural loading, fabrication estimates, and installation planning. In large-diameter stainless steel piping systems, total line weight can significantly affect handling and support requirements.
20 Inch Schedule 10S Pipe Calculation Notes
The listed weight is based on standard stainless steel pipe dimensions using the outside diameter and wall thickness of the pipe. Actual product weight may vary slightly depending on manufacturing tolerance, material grade, and supplier standard.
Frequently Asked Questions
What is the outside diameter of 20 inch Schedule 10S pipe?
The outside diameter is 508 mm.
What is the wall thickness of DN500 Schedule 10S pipe?
The wall thickness is 5.54 mm.
What is the inside diameter of NPS 20 Schedule 10S pipe?
The inside diameter is 496.92 mm.
How much does 20 inch Schedule 10S pipe weigh?
The approximate weight is 68.65 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.19 for stainless steel pipe.
Conclusion
Schedule 10S pipe 20 inch (DN500) has an outside diameter of 508 mm, wall thickness of 5.54 mm, inside diameter of 496.92 mm, and a weight of 68.65 kg/m. It is a useful reference for piping design, drafting, estimating, and stainless steel fabrication work.
How to Use This Pipe Reference
The dimension list and table are useful for different stages of piping work. The outside diameter helps with routing, clearances, clamps, sleeves, and connection coordination. The wall thickness and inside diameter support section identification and drawing review, while the listed mass helps with preliminary material estimates, handling, and support discussions.
Nominal size versus actual dimensions
NPS 20 and DN500 are size designations used to identify the pipe. They should not be treated as a direct substitute for the actual outside or inside diameter shown in the reference data. When a pipe must connect to another component, check the applicable fitting, flange, valve, gasket, and fabrication details rather than relying on nominal size alone.
Schedule and material selection
The “S” suffix identifies a stainless steel schedule designation under the referenced dimensional standard. Schedule information describes dimensional selection; it does not replace project requirements for stainless steel grade, product specification, testing, corrosion resistance, temperature service, or pressure design. Those items require review against the project specification and the applicable component and design standards.
Using the weight data
The listed mass per meter is a reference value for estimating and planning. Actual delivered mass can vary with manufacturing tolerances, product condition, grade, and supplier practice. For final lifting plans, pipe supports, structural checks, and installation engineering, use the approved material documentation and the complete assembled line weight, including contents, insulation, valves, fittings, and other attachments where applicable.
CAD and drawing workflow
The downloadable DWG can support preliminary drafting and layout coordination. Before issuing a drawing, verify drawing units, scale, layer conventions, connection details, and the dimensions of mating components. Useful related internal references include the site’s pipe dimensions and schedules guides, stainless steel pipe references, fitting and flange dimension pages, and CAD/DWG resources.
Additional Reference Questions
Is DN500 the same as the measured inside diameter?
No. DN500 is a nominal designation. The measured inside diameter is a separate dimensional value and should be taken from the table or approved product documentation.
Does Schedule 10S alone identify the stainless steel grade?
No. The schedule identifies the dimensional series. The stainless steel grade and product requirements must be confirmed separately from the project specification and material documentation.
Can the listed pipe weight be used as the final support load?
It is a reference value for preliminary planning, not a complete support load. Final checks should include the actual pipe, contents, fittings, valves, insulation, attachments, and applicable design conditions.
What should be checked before using the DWG?
Confirm units, drawing scale, dimensional references, connection geometry, and compatibility with the selected fittings and flanges before using the file for fabrication or issued-for-construction documentation.