This reference page is intended for engineers, designers, estimators, fabricators, and CAD drafters who need a quick dimensional check for 30 inch Schedule 20 pipe. It brings together the NPS designation, DN equivalent, outside diameter, wall thickness, inside diameter, and published pipe weight in one place.
When using the data, distinguish between the nominal size and the measured geometry: NPS 30 and DN750 identify the pipe size, while the outside diameter, wall thickness, and inside diameter describe its physical section. The values below can support piping layouts, material takeoffs, preliminary weight estimates, and drawing reviews.
Schedule 20 pipe 30 inch (DN750) is a large-diameter 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 30 Schedule 20 pipe based on ASME B36.10.
30 Inch Schedule 20 Pipe Dimensions
- Nominal Pipe Size (NPS): 30 inch
- Diameter Nominal (DN): DN750
- Outside Diameter (OD): 762 mm
- Wall Thickness: 12.7 mm
- Inside Diameter (ID): 736.6 mm
- Pipe Weight: 234.68 kg/m
- Pipe Weight Filled With Water: 660.6 kg/m
- Reference Standard: ASME B36.10
- Pipe Type: Steel Pipe
Schedule 20 Pipe 30 Inch Data Table
| Pipe Size | DN | OD (mm) | Wall Thickness (mm) | ID (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 30 inch | 750 | 762 | 12.7 | 736.6 | 234.68 |
What Does Schedule 20 Mean?
Schedule 20 refers to a lighter wall thickness series than heavier schedules such as Schedule 40, Schedule 80, or Schedule 160. For the same nominal pipe size, the outside diameter remains fixed while the wall thickness changes according to the schedule. A lighter wall gives a larger inside diameter and lower pipe weight.
Typical Uses of 30 Inch Schedule 20 Pipe
NPS 30 Schedule 20 pipe is commonly referenced in large-diameter industrial piping systems, utility lines, water-related systems, plant layout drawings, and fabrication work where a large flow area is needed with lower wall thickness than heavier pipe schedules.
Why Pipe Weight Matters
Pipe weight per meter is important for transport planning, crane lifting studies, support design, structural loading, fabrication estimates, and installation planning. For a 30 inch pipe, total line weight can still become very high even with a lighter schedule, so accurate data is essential for engineering work.
30 Inch Schedule 20 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 30 inch Schedule 20 pipe?
The outside diameter is 762 mm.
What is the wall thickness of DN750 Schedule 20 pipe?
The wall thickness is 12.7 mm.
What is the inside diameter of NPS 30 Schedule 20 pipe?
The inside diameter is 736.6 mm.
How much does 30 inch Schedule 20 pipe weigh?
The approximate weight is 234.68 kg/m.
Which standard covers this pipe size?
This dimension data is based on ASME B36.10 for steel pipe.
Conclusion
Schedule 20 pipe 30 inch (DN750) has an outside diameter of 762 mm, wall thickness of 12.7 mm, inside diameter of 736.6 mm, and a weight of 234.68 kg/m. It is a useful reference for piping design, fabrication, estimating, and industrial engineering work.
How to Use This Pipe Reference
For drafting and layout work, the outside diameter is the key envelope dimension because it affects clearances, supports, clamps, insulation space, and connections to fittings. The inside diameter is useful when reviewing flow paths, lining space, and approximate internal area. The wall thickness helps distinguish this schedule from other wall series for the same nominal pipe size.
The listed pipe weight is useful for estimating handling and line loads, but a complete engineering assessment may also need the fluid contents, insulation, valves, fittings, supports, operating conditions, material specification, and applicable design requirements. Do not treat schedule designation alone as a pressure-rating decision; that requires verification against the project design basis and governing requirements.
Related Pipe Design References
This page can be used alongside internal references for pipe schedules, ASME B36.10 steel pipe dimensions, pipe weight calculations, large-diameter fittings, flange dimensions, and pipe support design. These related topics help readers move from a dimensional lookup to layout coordination, fabrication planning, and engineering review without confusing nominal size with actual geometry.
Review Checklist for Drawings and Estimates
- Confirm that the drawing or material list identifies both the nominal size and schedule.
- Use the outside diameter when checking physical clearances and connection alignment.
- Use the inside diameter when reviewing the internal passage or process-side arrangement.
- Apply the published mass consistently in support, lifting, transport, and installation estimates.
- Verify material, manufacturing tolerance, corrosion allowance, and project-specific requirements before final design approval.
Additional Questions About 30 Inch Schedule 20 Pipe
Are NPS 30 and DN750 different pipe sizes?
They are different designation systems for the same nominal pipe size reference. The page identifies this pipe as NPS 30 and DN750.
Does Schedule 20 describe the pipe material?
No. Schedule 20 identifies a wall-thickness series. The material specification, grade, manufacturing method, and product requirements must be confirmed separately.
Can the listed weight be used as the complete installed line weight?
No. The listed value is the pipe weight per meter. An installed line estimate may also need contents, insulation, coatings, fittings, valves, flanges, supports, and other attached components.
Why should the drawing show both schedule and nominal size?
The nominal size identifies the pipe designation, while the schedule identifies its wall series. Showing both reduces the risk of selecting the wrong dimensional reference during procurement, fabrication, or CAD coordination.