This reference page is intended for quick technical checks during piping layout, CAD drafting, estimating, and preliminary support review. Use the dimension list and table together: the nominal size identifies the pipe designation, while the outside diameter, inside diameter, wall thickness, and weight support different types of engineering work.
When applying the data to a project, distinguish between a dimensional reference and a design approval. Pipe routing, clearances, supports, joining components, pressure requirements, material specifications, and operating conditions should be checked against the project documents and verified by the responsible engineer.
Schedule 30 pipe 28 inch (DN700) is a large-diameter steel pipe size commonly used in piping design, drafting, fabrication, estimation, and industrial layout work. This page provides the standard dimensions, wall thickness, inside diameter, and weight per meter for NPS 28 Schedule 30 pipe based on ASME B36.10.
For engineers, designers, estimators, and CAD users, quick access to accurate pipe data helps improve piping layout, support planning, weight checks, transport review, and fabrication coordination during project development.
28 Inch Schedule 30 Pipe Dimensions
- Nominal Pipe Size (NPS): 28 inch
- Diameter Nominal (DN): DN700
- Outside Diameter (OD): 711 mm
- Wall Thickness: 15.88 mm
- Inside Diameter (ID): 679.24 mm
- Pipe Weight: 272.23 kg/m
- Pipe Weight Including Water: 634.4 kg/m
- Standard: ASME B36.10
Schedule 30 Pipe 28 Inch Data Table
| NPS | DN | Outside Diameter (OD) | Wall Thickness | Inside Diameter (ID) | Weight |
|---|---|---|---|---|---|
| 28 inch | DN700 | 711 mm | 15.88 mm | 679.24 mm | 272.23 kg/m |
Understanding 28 Inch Schedule 30 Pipe
28 inch Schedule 30 pipe is a large steel pipe size used as a reference in industrial piping layouts, utility systems, water transmission lines, process design studies, and CAD drafting. With an outside diameter of 711 mm and a wall thickness of 15.88 mm, this pipe size is suitable for large-flow applications where designers need a balance between flow capacity and pipe wall strength.
What Does Schedule 30 Mean?
Schedule 30 refers to the wall thickness series of the pipe. For NPS 28, Schedule 30 gives a wall thickness of 15.88 mm. The schedule affects the inside diameter, total pipe weight, fabrication planning, and compatibility with supports, fittings, and structural loading requirements.
Why These Pipe Dimensions Matter
Accurate pipe dimension data is important for piping layouts, spool drawings, support design, structural load review, and material takeoff. Knowing that this pipe weighs 272.23 kg/m helps with transport estimates, lifting plans, and support loading. If the pipe is filled with water, the total weight increases to 634.4 kg/m, which is useful for operating load calculations and support checks.
Common Uses of DN700 Schedule 30 Pipe
DN700 Schedule 30 pipe may be referenced in industrial utility systems, large water transfer lines, plant layout studies, process piping documentation, and engineering design work. It is also useful for piping designers, CAD users, estimators, and procurement teams who need standard steel pipe dimensions for large-diameter piping systems.
Difference Between NPS 28 and DN700
NPS 28 is the inch-based nominal pipe size designation, while DN700 is the metric nominal diameter reference. Both refer to the same pipe size category on this page. The actual standard outside diameter for this size is 711 mm.
How to Use This Data
You can use this page to quickly check:
- pipe outside diameter for layout and clearance
- inside diameter for flow reference
- wall thickness for schedule comparison
- weight per meter for estimation and transport planning
- water-filled weight for support and structural load review
Quick Reference for Schedule 30 Pipe 28 Inch
- Pipe Size: 28 inch
- DN: DN700
- OD: 711 mm
- ID: 679.24 mm
- Wall Thickness: 15.88 mm
- Weight: 272.23 kg/m
- Weight Including Water: 634.4 kg/m
- Reference Standard: ASME B36.10
Related Pipe Size Pages
Conclusion
Schedule 30 Pipe 28 Inch (DN700) is an important large-diameter steel pipe reference for piping design, drafting, estimation, and fabrication work. With its 711 mm outside diameter, 15.88 mm wall thickness, and 272.23 kg/m pipe weight, it provides useful dimensional data for engineers and designers who need fast and accurate pipe information.
Note: NPS = Nominal Pipe Size, DN = Diameter Nominal. Dimensions and weights shown here are based on ASME B36.10 steel pipe data.
How to Read the Schedule 30 Pipe Data
The outside diameter is the key dimension for layout, opening coordination, insulation clearance, and checking space around the pipe. The inside diameter is the useful dimensional reference for flow-area studies and internal clearance checks. The difference between these diameters is represented by the listed wall thickness.
The listed pipe weight supports preliminary material estimates, handling reviews, and support-load calculations. The separate water-filled value represents a different loading condition and should not be substituted for the empty-pipe value. Project calculations may also need to consider contents, insulation, valves, fittings, supports, attachments, and applicable operating or test conditions.
Drafting and Coordination Checks
- Use the outside diameter when checking routing space, sleeve coordination, and nearby equipment clearances.
- Use the inside diameter when preparing a flow reference or checking internal passage assumptions.
- Use the wall thickness when comparing schedule information and coordinating fabrication details.
- Use the weight values as reference inputs for estimating and preliminary support review, then confirm the governing project load case.
- Check that connected fittings, flanges, valves, and supports are compatible with the selected pipe size and project specification.
Comparing Nearby Pipe Sizes
For adjacent large-diameter references, compare both the nominal designation and the actual outside diameter rather than relying on the inch or DN label alone. The related 24 inch DN600 Schedule 30 page and 30 inch DN750 Schedule 30 page can help with preliminary size comparisons.
For procurement, fabrication, or final design, confirm the applicable material specification, manufacturing requirements, tolerances, joining details, and project standard. The values on this page provide a focused dimensional reference; they do not by themselves establish allowable pressure, corrosion allowance, span, support spacing, or structural adequacy.
Frequently Asked Questions
What is the nominal size of Schedule 30 pipe on this page?
The pipe is identified as NPS 28 and DN700. These are nominal designations for the same pipe size category referenced here.
What does Schedule 30 identify?
Schedule 30 identifies the wall-thickness series associated with this pipe size. The page lists the corresponding wall thickness, inside diameter, outside diameter, and weight.
Which diameter should be used for piping layout?
Use the listed outside diameter for physical routing, clearance, and coordination checks. The inside diameter is more relevant to internal flow-area references and passage calculations.
What is the difference between pipe weight and pipe weight including water?
Pipe weight refers to the pipe itself, while the water-filled value represents the pipe together with its listed water load. Select the value that matches the condition being reviewed and include other project loads when applicable.
Does Schedule 30 establish the pipe pressure rating?
No. A schedule identifies a wall-thickness series; pressure suitability also depends on material, temperature, design code, corrosion allowance, joint details, and other project requirements. Confirm pressure design separately.
Can this data be used in a CAD drawing?
Yes, the dimensional data can support preliminary CAD layout and coordination. The downloadable DWG and the listed dimensions should still be checked against the project specification and the components being modeled.