This reference is intended for engineers, designers, estimators, fabricators, and CAD users who need a quick dimensional check for NPS 6 Schedule 10 pipe. The table provides the nominal size designation, outside diameter, wall thickness, inside diameter, and pipe weight in a format useful for piping layouts, material takeoffs, and preliminary support or handling reviews.
Use the dimensional data together with the applicable project specification, material requirements, joining method, corrosion allowance, and design conditions. For related background, connect this page with PipeSTD references covering pipe schedules, NPS and DN terminology, steel pipe dimensions, pipe fittings, and flanges.
Schedule 10 pipe 6 inch (DN150) is a standard steel pipe size commonly used in piping design, fabrication, drafting, and estimation work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 6 Schedule 10 pipe based on ASME B36.10.
6 Inch Schedule 10 Pipe Dimensions
- Nominal Pipe Size (NPS): 6 inch
- Diameter Nominal (DN): DN150
- Outside Diameter (OD): 168.3 mm
- Wall Thickness: 3.4 mm
- Inside Diameter (ID): 161.5 mm
- Pipe Weight: 13.83 kg/m
- Pipe Weight Filled With Water: 34.3 kg/m
- Reference Standard: ASME B36.10
Schedule 10 Pipe 6 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 6 inch | 150 | 168.3 | 3.4 | 161.5 | 13.83 |
What Does Schedule 10 Mean?
Schedule 10 refers to the wall thickness series of the pipe. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness changes depending on the schedule. A thicker wall generally increases pipe weight and reduces the inside diameter.
Typical Uses of 6 Inch Schedule 10 Pipe
NPS 6 Schedule 10 pipe is commonly used in water transfer lines, utility systems, low-pressure process piping, drainage applications, and general fabrication work where a lighter wall thickness is suitable. It is also a practical reference size for material takeoff, support planning, and piping layout.
Why Pipe Weight Matters
Pipe weight per meter is important for transport planning, support design, structural loading, fabrication estimates, and lifting calculations. Even in medium-size piping systems, installed weight can affect support spacing, handling methods, and project cost.
6 Inch Schedule 10 Pipe Calculation Notes
The listed weight is based on standard steel pipe dimension data 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 6 inch Schedule 10 pipe?
The outside diameter is 168.3 mm.
What is the wall thickness of DN150 Schedule 10 pipe?
The wall thickness is 3.4 mm.
What is the inside diameter of NPS 6 Schedule 10 pipe?
The inside diameter is 161.5 mm.
How much does 6 inch Schedule 10 pipe weigh?
The approximate weight is 13.83 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for welded and seamless wrought steel pipe.
Conclusion
Schedule 10 pipe 6 inch (DN150) has an outside diameter of 168.3 mm, wall thickness of 3.4 mm, inside diameter of 161.5 mm, and a weight of 13.83 kg/m. It is a useful reference for piping design, drafting, estimating, and fabrication work.
How to Use This 6 Inch Schedule 10 Reference
The nominal designation identifies the pipe size used in standards and drawings; it is not the same as a direct measurement of the pipe outside diameter. For procurement, layout, and CAD work, the outside diameter is especially important because fittings, clamps, supports, sleeves, and connection details must be coordinated with the corresponding pipe standard.
The inside diameter is useful when reviewing flow passage, lining or coating allowances, clearance, and interface conditions. It should not be treated as a guaranteed finished bore for every manufactured product because actual dimensions can be affected by manufacturing tolerance, coating, lining, or other project requirements.
Schedule, Weight, and Design Coordination
A schedule identifies a wall-thickness series within a nominal pipe size. It is therefore a dimensional designation, not a complete statement of allowable pressure, temperature, material strength, or service suitability. Those items require a separate engineering review using the governing design code, material specification, joining details, corrosion requirements, and operating conditions.
The listed mass per meter supports estimating, transport planning, lifting reviews, and preliminary support-load coordination. When a line is filled, the additional contents load should also be considered; the source table provides a water-filled reference for that purpose. Final installed loads may need to include valves, fittings, flanges, insulation, lining, supports, and other attached items.
Drafting and Procurement Checks
- Use the nominal designation consistently across drawings, bills of material, and specifications.
- Check the outside diameter when coordinating fittings, branches, clamps, sleeves, and structural interfaces.
- Confirm the required wall series and material specification before ordering or fabricating.
- Review the applicable product standard and project requirements rather than selecting a pipe from dimensions alone.
- Use the accompanying DWG resource as a drafting aid, then verify project-specific tolerances and connection details.
Additional Questions About 6 Inch Schedule 10 Pipe
Is NPS 6 the same nominal size as DN150?
Yes. In this reference, NPS 6 and DN150 identify the same nominal pipe size using two different designation systems. The nominal designation should still be checked against the project standard and procurement documents.
Does Schedule 10 by itself establish a pressure rating?
No. Schedule 10 describes the pipe wall-thickness series. Pressure capability depends on additional factors such as material, temperature, allowable stress, manufacturing requirements, joining details, corrosion allowance, and the governing design code.
Why should the outside diameter be checked when selecting fittings?
Fittings and connection components must match the pipe geometry and applicable dimensional standard. Confirming the outside diameter helps prevent mismatches during layout, fabrication, and installation.
Can the listed pipe weight be used as the complete installed line load?
No. The listed pipe weight is a useful reference for the pipe itself. A project load review may also need to include contents, fittings, valves, flanges, insulation, lining, supports, and other attached equipment.