This reference is intended for engineers, designers, estimators, fabricators, and inspectors who need a quick way to interpret 8 inch Schedule XS pipe data. The table below should be read together with the terminology and application notes so that nominal size, outside diameter, inside diameter, wall thickness, and mass are not treated as interchangeable values.
Use this page alongside related PipeSTD references for pipe schedules, NPS and DN terminology, steel pipe fittings, flange dimensions, and CAD/DWG pipe resources. These related topics help connect the dimensional data to layout, detailing, procurement, and fabrication workflows.
Schedule XS Pipe 8 Inch (DN200) is a steel pipe size commonly used in industrial piping systems, utility lines, water transmission projects, plant construction, and fabrication work. This page provides a practical reference for the main dimensions and weight of 8 inch XS pipe based on ANSI/ASME B36.10.
For piping engineers, CAD designers, estimators, fabrication teams, and site supervisors, accurate pipe size data is important for layout work, material takeoff, support design, transport planning, and installation checks. This guide presents the essential dimensions in a cleaner format that adds more value than a simple size table.
8 Inch Schedule XS Pipe Dimensions
- Pipe Size: 8 Inch
- Nominal Diameter: DN200
- Pipe Schedule: XS (Extra Strong)
- Outside Diameter (OD): 219.1 mm
- Inside Diameter (ID): 193.7 mm
- Wall Thickness: 12.7 mm
- Pipe Weight: 64.64 kg/m
- Pipe Weight Including Water: 94.09 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule XS Pipe 8 Inch Table
| NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 8″ | 200 | 219.1 | 193.7 | 12.7 | 64.64 |
What Does Schedule XS Mean?
Schedule XS stands for Extra Strong. It is a pipe wall designation used in steel pipe standards. The selected schedule affects the wall thickness, which directly affects the inside diameter, pipe weight, fabrication requirements, and support loading.
For a size such as 8 inch DN200 pipe, wall thickness remains important because it affects total pipe weight, handling requirements, support loads, and installation planning in real projects.
Why 8 Inch DN200 Pipe Dimensions Matter
Knowing the exact dimensions of 8 inch Schedule XS pipe is useful for several engineering and construction tasks:
- Fabrication: OD and wall thickness are needed for cutting, beveling, welding, and fit-up work.
- Support Design: Pipe weight per meter helps engineers check support spacing and structural loads.
- Flow Review: ID is useful for estimating internal flow area and hydraulic performance.
- Transport and Lifting: Accurate weight data supports safer handling and planning.
- Schedule Comparison: Engineers often compare XS with STD, Sch 40, Sch 60, or Sch 80 during design review.
Typical Applications of 8 Inch Schedule XS Pipe
This pipe size may be used in:
- Industrial process piping
- Water transmission systems
- Power and utility projects
- Plant piping works
- Infrastructure construction
- Custom steel fabrication and spool projects
Engineering Notes
NPS means Nominal Pipe Size, while DN means Diameter Nominal. Although this pipe is called 8 inch, the actual outside diameter is 219.1 mm according to the standard. The inside diameter changes with the pipe schedule because wall thickness changes from one schedule to another.
That means if you compare the same 8 inch pipe in a different schedule, the OD usually stays the same, while the ID, wall thickness, and pipe weight will change.
Reference
The dimension data on this page is based on ANSI/ASME B36.10, which is widely used for steel pipe dimensions in industrial applications.
How to Read the 8 Inch XS Pipe Data
The designation 8 inch identifies the nominal pipe size, while DN200 is the corresponding metric nominal designation. Neither term should be used as a substitute for the measured outside or inside diameter. For modeling and fit-up, the OD and wall thickness are especially important because they influence the pipe envelope, connection geometry, and available internal passage.
The listed 64.64 kg/m pipe weight describes the pipe itself on a unit-length basis. The separate 94.09 kg/m value includes water and is useful when considering a filled line for handling or support-load discussions. Actual project checks may also need to account for fittings, valves, insulation, contents, supports, corrosion allowance, and the requirements of the applicable project specification.
Design and Drafting Checks
- Use the OD when checking clearances, clamps, sleeves, supports, and connection alignment.
- Use the ID when reviewing internal passage and flow-related calculations.
- Use wall thickness when checking fabrication details, weld preparation, and schedule comparisons.
- Use the unit-length weight for preliminary takeoffs, lifting plans, and support-load coordination.
- Confirm the selected pipe schedule against the project line class, material specification, joining method, and engineering calculations before fabrication or installation.
Related PipeSTD References
Readers comparing this entry with other sizes can continue to the site’s pipe dimensions and schedules references. For a complete piping detail, also review the relevant elbow, tee, reducer, flange, and fitting dimensions. The downloadable DWG is useful for CAD coordination, but the drawing should be checked against the governing project documents before it is used for final fabrication.
Frequently Asked Questions
What does 8 inch Schedule XS pipe mean?
It identifies a nominal 8 inch steel pipe with the XS, or Extra Strong, wall designation. The source data associates this size with DN200.
Does the outside diameter change when the schedule changes?
For the same nominal pipe size, the outside diameter generally remains the controlling standard dimension while wall thickness changes between schedules. That change affects the inside diameter and pipe weight.
What is the inside diameter of 8 inch XS pipe?
The listed inside diameter is 193.7 mm. Use the project’s approved dimensional reference when checking actual fit-up or manufactured tolerances.
How much does 8 inch XS pipe weigh?
The listed pipe weight is 64.64 kg/m. The reference also lists 94.09 kg/m for the pipe including water. These values support preliminary planning and should be coordinated with the complete installed system.
What standard is used for the dimensions?
The page identifies ANSI/ASME B36.10 as the reference for the steel pipe dimensions. Project specifications and approved procurement documents should also be checked for material and manufacturing requirements.