This reference is intended for engineers, designers, estimators, fabricators, and CAD detailers who need to identify 6 inch Schedule 160 pipe consistently. Use the dimensional data below when checking piping layouts, preparing material takeoffs, reviewing connection details, or downloading the associated DWG resource.
Because pipe size terminology can be confusing, the page shows the relationship between NPS 6, DN150, outside diameter, wall thickness, and inside diameter. The listed values should be read together with the applicable material specification, manufacturing requirements, project piping class, and design code.
Schedule 160 pipe 6 inch (DN150) is an extra 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 6 Schedule 160 pipe based on ASME B36.10.
6 Inch Schedule 160 Pipe Dimensions
- Nominal Pipe Size (NPS): 6 inch
- Diameter Nominal (DN): DN150
- Outside Diameter (OD): 168.3 mm
- Wall Thickness: 18.26 mm
- Inside Diameter (ID): 131.78 mm
- Pipe Weight: 67.57 kg/m
- Pipe Weight Filled With Water: 81.2 kg/m
- Reference Standard: ASME B36.10
- Pipe Type: Steel Pipe
Schedule 160 Pipe 6 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 6 inch | 150 | 168.3 | 18.26 | 131.78 | 67.57 |
What Does Schedule 160 Mean?
Schedule 160 refers to an extra 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 much thicker wall reduces the inside diameter and significantly increases pipe weight.
Typical Uses of 6 Inch Schedule 160 Pipe
NPS 6 Schedule 160 pipe is commonly referenced for very heavy-duty industrial piping systems where extremely 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 a 6 inch Schedule 160 pipe, the extra heavy wall thickness results in much higher installed weight than lighter schedules, so accurate weight data is important for engineering and construction work.
6 Inch Schedule 160 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 6 inch Schedule 160 pipe?
The outside diameter is 168.3 mm.
What is the wall thickness of DN150 Schedule 160 pipe?
The wall thickness is 18.26 mm.
What is the inside diameter of NPS 6 Schedule 160 pipe?
The inside diameter is 131.78 mm.
How much does 6 inch Schedule 160 pipe weigh?
The approximate weight is 67.57 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for steel pipe.
Conclusion
Schedule 160 pipe 6 inch (DN150) has an outside diameter of 168.3 mm, wall thickness of 18.26 mm, inside diameter of 131.78 mm, and a weight of 67.57 kg/m. It is a useful reference for piping design, fabrication, estimating, and heavy-duty industrial engineering work.
How to Use This Schedule 160 Pipe Reference
Start with the outside diameter when checking physical clearance, pipe routing, clamps, supports, sleeves, and connection geometry. Use the wall thickness and inside diameter when reviewing bore clearance, fabrication details, and flow-area assumptions. The nominal size identifies the pipe designation; it should not be treated as a direct measurement of the actual inside diameter.
The schedule identifies a wall-thickness series for a given nominal pipe size. It is not, by itself, a pressure rating or a complete design basis. Pressure and temperature limits require a separate engineering check using the pipe material, design conditions, allowable stresses, joining method, corrosion allowance, and governing project requirements.
Weight, Supports, and Installation Planning
The tabulated pipe weight is useful for preliminary material estimates, transportation planning, lifting studies, support reactions, and structural loading reviews. When a line is filled with water or another fluid, the contents add to the pipe self-weight. Support and lifting calculations should also consider valves, flanges, insulation, fittings, temporary conditions, and the actual supplied product.
Drafting and CAD Workflow
For drafting work, confirm that the selected CAD file matches the intended nominal size and schedule before placing it in a layout. Check drawing units, centerline assumptions, connection details, and the project standard for dimensions that are not defined by the pipe table. The downloadable DWG is most useful as a starting reference; it should not replace a project-approved piping specification or fabrication drawing.
Useful related internal references include the site’s pipe schedule chart, steel pipe dimensions, flange dimensions, pipe fittings reference, pipe weight calculator, and CAD/DWG library. Linking these topics from this page can help readers move from a single pipe size to the surrounding design and drafting information without duplicating the authoritative table.
Additional Questions About 6 Inch Schedule 160 Pipe
Is DN150 the same as a 150 mm inside diameter?
No. DN150 is a nominal designation used to identify the pipe size. The actual outside diameter, wall thickness, and inside diameter are separate dimensional properties listed in the reference data.
Does Schedule 160 define the pipe pressure rating?
No. Schedule 160 describes the wall-thickness series for the pipe size. A pressure design check also depends on material, temperature, code requirements, corrosion allowance, manufacturing specification, and service conditions.
Why can supplied pipe weight differ from the tabulated value?
Reference weight is based on the stated dimensions and standard calculation assumptions. Delivered product weight can vary because of manufacturing tolerances, material requirements, coating, end preparation, and supplier practice.
What should be checked before using the DWG file?
Confirm the nominal size, schedule, drawing units, geometry, connection requirements, and project drafting standard. The file should be reviewed against the applicable piping specification before it is used for fabrication or issued construction documents.
Should fittings and flanges be checked separately?
Yes. Fittings and flanges have their own dimensional and rating requirements. Use the relevant fittings and flange references, then verify compatibility with the pipe specification and the project piping class.