This reference provides a practical overview of Schedule STD Pipe 6 Inch (DN150) for engineers, drafters, fabricators, estimators, and procurement teams. Use the dimensional table as the page’s controlling data, then apply the explanatory sections to understand how nominal size, schedule designation, diameter, thickness, and weight are used during piping coordination.
The page also includes a downloadable DWG reference. CAD users can use it alongside project drawings, fitting layouts, flange references, and support details, while confirming all geometry and specifications against the approved project documentation.
Schedule STD Pipe 6 Inch (DN150) is a steel pipe size commonly used in industrial and utility piping systems where standard dimensions, structural reliability, and dependable flow capacity are important. Based on the current page data under ANSI/ASME B36.10, this pipe size has an outside diameter of 168.3 mm, an inside diameter of 154.08 mm, a wall thickness of 7.11 mm, and a pipe weight of 28.26 kg/m.
6 Inch Schedule STD Pipe Dimensions
The following values are listed for NPS 6 Schedule STD pipe, which corresponds to DN150 in metric designation.
- Pipe Size: NPS 6 Inch
- DN Size: DN150
- Outside Diameter (OD): 168.3 mm
- Inside Diameter (ID): 154.08 mm
- Wall Thickness: 7.11 mm
- Pipe Weight: 28.26 kg/m
- Pipe Weight Including Water: 46.89 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule STD Pipe 6 Inch (DN150) Data Table
| Pipe Schedule | NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|---|
| STD | 6 Inch | 150 | 168.3 | 154.08 | 7.11 | 28.26 |
What Is Schedule STD Pipe?
Schedule STD means Standard Weight in the IPS pipe system and is commonly referenced for carbon steel and steel pipe dimensions under ASME B36.10. In practical piping work, Schedule STD is used as a standard wall thickness designation for many nominal pipe sizes. It helps engineers, fabricators, and buyers confirm dimensional compatibility, estimate weight, and coordinate with fittings, flanges, supports, and structural loads.
Common Uses of 6 Inch Schedule STD Pipe
6 inch Schedule STD pipe is commonly used in industrial and utility piping systems where good flow capacity and standard steel pipe dimensions are required. This size is often selected for water, cooling, transmission, and plant services where reliable dimensional data is important for design, fabrication, and construction.
- Water transmission lines for plant and utility service
- Cooling water systems in industrial facilities
- Stormwater and drainage piping in infrastructure projects
- Industrial utility piping for bulk fluid transport
- Pipeline headers and manifolds in process plants
- Pump suction and discharge lines where larger diameter piping is needed
- Municipal and public works projects requiring steel pipe sizes
- Replacement and upgrade projects where standard pipe dimensions are required
In practical engineering work, this pipe size may be reviewed when checking flow capacity, support loading, transport weight, handling requirements, and installation planning. Final pipe selection should always be verified against project pressure, temperature, fluid type, corrosion allowance, and material specifications.
Why OD, ID, Thickness, and Weight Matter
Exact OD, ID, wall thickness, and weight values are important for support design, material take-off, transport planning, lifting studies, welding preparation, and installation work. For a pipe as large as 6 inch DN150, accurate weight data is useful for crane selection, support design, and logistics planning. Inside diameter is also important for flow calculations and hydraulic capacity review.
NPS 6 and DN150 Explained
NPS means nominal pipe size in inch units, while DN means diameter nominal in metric units. The current page identifies this pipe as NPS 6 and DN150, which is the standard naming format widely used in piping drawings, specifications, and procurement documents.
Conclusion
Schedule STD Pipe 6 Inch (DN150) is listed on the current page with 168.3 mm OD, 154.08 mm ID, 7.11 mm wall thickness, and 28.26 kg/m weight. It is a useful steel pipe reference for engineers, designers, and buyers who need standard dimensional and weight data for piping systems and project coordination.
How to Use This Pipe Reference
Start with the data table when checking dimensional compatibility. The outside diameter is important for fitting interfaces, clamps, sleeves, supports, and layout clearances. The inside diameter is used when reviewing flow area and hydraulic calculations. Wall thickness and listed weight support material take-offs, fabrication planning, handling studies, and preliminary support-load checks.
Although NPS and DN provide a standardized way to identify the pipe, they should not be treated as a substitute for the actual dimensional data. Drawings, bills of material, purchase specifications, and connection details should use the listed dimensions and the project’s required material and manufacturing requirements.
Schedule, Material, and Pressure Are Different Design Topics
Schedule STD identifies a standard wall designation within the referenced pipe-dimension system. It does not by itself define the pipe material grade, corrosion resistance, allowable pressure, temperature limit, joining method, or complete design suitability. Those items require separate review against the project specification, fluid service, operating conditions, applicable design code, and inspection requirements.
Coordination With Related Piping Components
For a complete layout review, coordinate this pipe information with the selected elbows, tees, reducers, flanges, valves, gaskets, supports, and equipment nozzles. Connection compatibility depends on more than nominal size; designers should also check the applicable component standard, facing and joining details, end preparation, clearance, and project-specific requirements.
This page is especially useful when paired with related references covering pipe schedules, NPS and DN terminology, steel pipe fittings, flange dimensions, pipe support design, and DWG piping details. These related resources can help readers move from a dimensional lookup to a coordinated drafting or procurement decision.
Checks Before Procurement or Fabrication
- Confirm that the nominal size and schedule match the piping specification.
- Confirm material grade, manufacturing requirements, and applicable inspection provisions separately.
- Check the listed dimensions against mating fittings, flanges, valves, and equipment connections.
- Use the appropriate weight basis for transport, lifting, supports, and installation planning.
- Review pressure, temperature, corrosion allowance, fluid service, and design-code requirements before approval.
- Use the DWG as a reference aid rather than as a replacement for approved project drawings.
Frequently Asked Questions
What does Schedule STD mean?
Schedule STD means Standard Weight in the IPS pipe system. It is a dimensional wall designation used to identify pipe geometry and coordinate related components; it is not, by itself, a material grade or pressure rating.
Are NPS 6 and DN150 the same naming system?
They are two nominal designations used for the same pipe-size reference on this page. NPS uses inch-based terminology, while DN uses metric nominal terminology. The actual OD, ID, and wall thickness should be taken from the dimensional data rather than inferred from the nominal name.
What is the difference between pipe weight and pipe weight including water?
Pipe weight describes the pipe itself, while the water-inclusive value represents the pipe together with the water contained inside it. The correct basis depends on whether the review concerns shipping, lifting, empty-pipe supports, or an operating-filled condition.
Does Schedule STD alone confirm that the pipe is suitable for a project?
No. Final selection also depends on material, fluid, operating pressure and temperature, corrosion allowance, joining requirements, design code, and project specifications. An engineer should verify suitability before the pipe is released for design or purchase.
Where can the CAD file be used?
The downloadable DWG can support preliminary drafting, layout coordination, and reference work. It should be checked against approved project geometry, connection details, and the applicable pipe and component specifications before construction use.
Quick Answers
Is Schedule STD a pressure class?
No. Schedule STD describes a standard pipe wall designation. Pressure capability must be evaluated using the material, design conditions, applicable code, and project requirements.
Why should the actual OD and ID be checked?
Nominal size labels are useful for identification, but actual diameters control many layout, connection, clearance, and flow-related checks.
What should be coordinated with this pipe size?
Review fittings, flanges, valves, equipment nozzles, supports, sleeves, insulation allowances, and the project’s fabrication and procurement requirements.