This reference provides a quick way to interpret the dimensional data for 42 inch Schedule XS pipe, also identified as DN1050. Use the source table for the authoritative OD, ID, wall thickness, and weight values, then apply the explanatory notes below when reviewing drawings, takeoffs, fabrication details, or installation plans.
For related design work, compare this page with PipeSTD references covering pipe schedules, NPS and DN terminology, pipe fittings, flange dimensions, and CAD/DWG pipe resources. These subjects help connect nominal size data with the components and documents used in a complete piping layout.
Schedule XS Pipe 42 Inch (DN1050) is a large steel pipe size used in industrial piping systems, water transmission projects, utility lines, plant construction, and heavy fabrication work. This page provides a practical reference for the main dimensions and weight of 42 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.
42 Inch Schedule XS Pipe Dimensions
- Pipe Size: 42 Inch
- Nominal Diameter: DN1050
- Pipe Schedule: XS (Extra Strong)
- Outside Diameter (OD): 1067 mm
- Inside Diameter (ID): 1041.6 mm
- Wall Thickness: 12.7 mm
- Pipe Weight: 330.21 kg/m
- Pipe Weight Including Water: 1181.88 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule XS Pipe 42 Inch Table
| NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 42″ | 1050 | 1067 | 1041.6 | 12.7 | 330.21 |
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 large size such as 42 inch DN1050 pipe, wall thickness matters even more because it has a strong effect on lifting weight, handling, structural loading, and installation planning in real projects.
Why 42 Inch DN1050 Pipe Dimensions Matter
Knowing the exact dimensions of 42 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: Large pipe sections require reliable weight data for safe handling.
- Schedule Comparison: Engineers often compare XS with STD, Sch 40, Sch 60, or Sch 80 during design review.
Typical Applications of 42 Inch Schedule XS Pipe
This pipe size may be used in:
- Industrial process piping
- Water transmission systems
- Power and utility projects
- Large 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 42 inch, the actual outside diameter is 1067 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 42 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 carbon steel pipe dimensions in industrial applications.
How to Use This 42 Inch XS Pipe Reference
Start with the outside diameter when checking spatial clearances, fittings, supports, and drawing geometry. Use the wall thickness and inside diameter together when reviewing the pipe section, fabrication details, or internal flow path. The listed pipe weight is useful for material estimates and preliminary handling or support-load reviews.
The separate weight including water value represents a different loading condition from the dry pipe weight. Keep those two values distinct in calculations, and confirm the project design basis before using either value for supports, lifting, transport, or temporary works.
Drafting and Fabrication Considerations
For CAD and spool work, the nominal designation should not be treated as the actual outside diameter. The source identifies the pipe as 42 inch and DN1050, while the dimensional data gives the actual OD and the schedule-dependent wall and ID values. This distinction is important when aligning pipe ends with fittings, checking clearances, and preparing fabrication drawings.
When connecting this reference to other PipeSTD resources, useful next steps include reviewing pipe elbow dimensions, butt-weld fitting references, flange dimensions, and pipe support terminology. Those related references can help complete a line-item check without confusing pipe dimensions with fitting or flange dimensions.
Verification Before Project Use
Use the listed values as a dimensional reference, not as a substitute for project-specific engineering review. Confirm the applicable material specification, manufacturing tolerances, corrosion allowance, joining details, design loads, operating condition, and governing project documents before finalizing fabrication, support, lifting, or pressure-related decisions.
FAQ
What does 42 inch DN1050 identify?
42 inch is the nominal pipe size designation, while DN1050 is the corresponding nominal diameter designation used in metric terminology. The actual outside diameter is given separately in the source data.
What does XS mean for this pipe?
XS means Extra Strong. It identifies a pipe wall designation. For this reference, the schedule determines the listed wall thickness, inside diameter, and pipe weight.
Does the schedule change the outside diameter?
For the same nominal pipe size, the outside diameter generally remains the reference dimension while schedule changes affect wall thickness, inside diameter, and weight. Always verify the specific schedule data before selecting connected components.
What is the difference between pipe weight and weight including water?
Pipe weight describes the dry pipe value listed in the source table. Weight including water describes the pipe together with its internal water load. They should be treated as separate conditions during support, lifting, transport, and installation reviews.
Where can the 42 inch XS pipe DWG be accessed?
The downloadable DWG resource is provided with this page. Use it as a drafting reference and verify dimensions, connection details, tolerances, and project requirements before using the drawing for fabrication.