Use this reference when you need a quick dimensional check for 8 inch Schedule 140 pipe in piping layouts, material takeoffs, fabrication documents, or engineering estimates. The page separates nominal size, outside diameter, wall thickness, inside diameter, and pipe weight so each value can be applied correctly.
For related work, compare this entry with other pipe schedule dimensions, steel pipe weight references, flange dimensions, and pipe fitting resources. The accompanying DWG download can also support preliminary drafting and layout coordination.
Schedule 140 pipe 8 inch (DN200) is a heavy-wall steel pipe size commonly used in piping design, fabrication, drafting, and engineering estimation work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 8 Schedule 140 pipe based on ASME B36.10.
8 Inch Schedule 140 Pipe Dimensions
- Nominal Pipe Size (NPS): 8 inch
- Diameter Nominal (DN): DN200
- Outside Diameter (OD): 219.1 mm
- Wall Thickness: 20.62 mm
- Inside Diameter (ID): 177.86 mm
- Pipe Weight: 100.93 kg/m
- Pipe Weight Filled With Water: 125.76 kg/m
- Reference Standard: ASME B36.10
- Pipe Type: Steel Pipe
Schedule 140 Pipe 8 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 8 inch | 200 | 219.1 | 20.62 | 177.86 | 100.93 |
What Does Schedule 140 Mean?
Schedule 140 refers to a very heavy wall thickness series used for steel pipe under ASME B36.10. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness increases according to the schedule. A thicker wall reduces the inside diameter and significantly increases pipe weight.
Typical Uses of 8 Inch Schedule 140 Pipe
NPS 8 Schedule 140 pipe is commonly referenced for heavy-duty industrial piping systems where very high wall thickness is required. It may be used in process piping, plant utility systems, structural loading checks, fabrication work, and engineering applications where pipe strength and wall thickness are more critical than maximum flow area.
Why Pipe Weight Matters
Pipe weight per meter is essential for transport planning, crane lifting studies, support design, structural loading, fabrication estimates, and installation planning. For an 8 inch Schedule 140 pipe, the heavy wall thickness results in much higher installed weight than lighter schedules, so accurate weight data is important for engineering and construction work.
8 Inch Schedule 140 Pipe Calculation Notes
The listed weight is based on standard steel pipe dimensions using the outside diameter and wall thickness of the pipe. Actual product weight may vary slightly depending on manufacturing tolerance, material specification, and supplier standard.
Frequently Asked Questions
What is the outside diameter of 8 inch Schedule 140 pipe?
The outside diameter is 219.1 mm.
What is the wall thickness of DN200 Schedule 140 pipe?
The wall thickness is 20.62 mm.
What is the inside diameter of NPS 8 Schedule 140 pipe?
The inside diameter is 177.86 mm.
How much does 8 inch Schedule 140 pipe weigh?
The approximate weight is 100.93 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for steel pipe.
Conclusion
Schedule 140 pipe 8 inch (DN200) has an outside diameter of 219.1 mm, wall thickness of 20.62 mm, inside diameter of 177.86 mm, and a weight of 100.93 kg/m. It is a useful reference for piping design, fabrication, estimating, and heavy-duty industrial engineering work.
How to Use This Pipe Reference
The nominal designation identifies the pipe size category, while the outside diameter is the fixed dimensional reference used to coordinate many fittings and connection components. The schedule identifies the wall-thickness series; it is not a direct substitute for reviewing the listed wall thickness and inside diameter.
For flow-related work, use the listed inside diameter rather than the nominal size. For support, lifting, transport, and structural coordination, use the listed pipe weight and distinguish the empty-pipe value from the water-filled value. Actual installed loading may also include insulation, coatings, valves, fittings, contents, and support attachments.
Important Design and Procurement Checks
The dimensional data is useful for layout and estimating, but schedule designation alone does not establish a complete pressure, temperature, corrosion, material, or joining requirement. Before procurement or design release, confirm the project specification, material requirements, manufacturing tolerances, end connections, corrosion allowance, and applicable design calculations.
Use the DWG as a drafting aid and verify drawing units, scale, connection geometry, and project-specific requirements before incorporating it into a controlled design package. For additional reference work, this page can be linked from pipe schedule comparison pages, nominal pipe size guides, steel pipe weight calculators, and CAD resources.
Additional Reference Questions
Is Schedule 140 the same as the pipe pressure rating?
No. Schedule 140 identifies a wall-thickness series. Pressure capability also depends on material, temperature, manufacturing requirements, corrosion allowance, joining details, and the governing design rules.
Why should the inside diameter be checked separately from the nominal size?
Nominal pipe size is a designation rather than a direct flow-area measurement. The listed inside diameter is the appropriate dimensional reference for preliminary flow-area and clearance checks.
Can the listed pipe weight be used as an exact purchase weight?
It is a reference value for estimating and planning. Final supplied weight can vary with manufacturing tolerance, material specification, product length, and supplier documentation.
What should be verified before using the DWG in a project?
Check units, scale, geometry, connection details, revision status, and compatibility with the project specification. A downloaded drawing should not replace approved project drawings or engineering review.