This reference page brings together the key dimensional information for 44 inch Schedule XS pipe, also identified as DN1100. Use the table for quick dimensional checks, then review the notes below to understand how outside diameter, inside diameter, wall thickness, and weight affect drafting and project planning.
For related reference work, connect this page with resources covering pipe dimensions, pipe schedules, pipe fittings, and pipe flanges. These topics help users move from a pipe-size lookup to a more complete piping layout review.
Schedule XS Pipe 44 Inch (DN1100) is a large steel pipe size used in industrial piping systems, plant construction, utility lines, water transmission projects, and heavy fabrication work. This page provides a practical reference for the main dimensions and weight of 44 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.
44 Inch Schedule XS Pipe Dimensions
- Pipe Size: 44 Inch
- Nominal Diameter: DN1100
- Pipe Schedule: XS (Extra Strong)
- Outside Diameter (OD): 1118 mm
- Inside Diameter (ID): 1092.6 mm
- Wall Thickness: 12.7 mm
- Pipe Weight: 346.18 kg/m
- Pipe Weight Including Water: 1283.29 kg/m
- Reference Standard: ANSI/ASME B36.10
Schedule XS Pipe 44 Inch Table
| NPS | DN | OD (mm) | ID (mm) | Wall Thickness (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 44″ | 1100 | 1118 | 1092.6 | 12.7 | 346.18 |
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 44 inch DN1100 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 44 Inch DN1100 Pipe Dimensions Matter
Knowing the exact dimensions of 44 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 44 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 44 inch, the actual outside diameter is 1118 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 44 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 44 Inch XS Pipe Reference
Start with the dimensional list and table when checking a piping model, fabrication drawing, material takeoff, or procurement description. The outside diameter is the primary envelope dimension for layout and connection coordination. The inside diameter is more relevant to the internal passage and flow review, while wall thickness helps identify the selected pipe schedule and affects the mass of the pipe.
The listed pipe weight is useful for estimating linear material weight and for developing preliminary handling, support, and transport checks. The water-included value should be treated as a separate planning reference from the empty-pipe weight. Final support, lifting, and structural decisions still require the project design basis, actual pipe specifications, connection details, operating contents, and engineer approval.
Important Terminology for Drawings and Takeoffs
- NPS: The inch-based nominal pipe size designation used in piping references. It is a nominal identifier, not necessarily the measured outside diameter.
- DN: The metric nominal designation associated with the pipe size.
- OD: The outside diameter used for envelope coordination, clamps, supports, sleeves, and connection detailing.
- ID: The inside diameter used when reviewing the internal passage and related hydraulic considerations.
- XS: The Extra Strong wall designation identified in the source data.
Coordination Checks Before Fabrication
When using this page for a drawing or model, confirm that the pipe schedule matches the connected fittings, flanges, valves, branches, and specialty components. Check the dimensional basis against the project specification and the approved material documentation before releasing fabrication information.
For CAD workflows, the accompanying DWG reference can support drafting coordination. It should be reviewed against the governing project documents before it is used as the sole basis for fabrication, shop detailing, or field modification. A useful next step is to connect this page to the site’s CAD and DWG reference library and its piping terminology guide.
Related Reference Topics
- Pipe schedule charts for comparing schedule designations across sizes
- Steel pipe dimensions for broader OD, ID, and wall-thickness reference work
- Pipe weight calculations for project estimating and handling studies
- Pipe fitting dimensions for layout and connection coordination
Frequently Asked Questions
What is the nominal size of 44 inch Schedule XS pipe?
The nominal designations shown on this page are 44 inch NPS and DN1100. These are identification systems; the actual measured dimensions are provided separately in the reference data.
What does XS mean in pipe sizing?
XS means Extra Strong. It identifies a pipe wall designation. The selected wall designation affects the inside diameter and pipe weight in addition to fabrication and support considerations.
Why are both OD and ID listed?
OD describes the external envelope of the pipe and is important for layout, supports, sleeves, and connections. ID describes the internal passage and is used for internal flow reviews and clearance checks.
Can the listed pipe weight be used for support design?
The listed weight can support preliminary estimating and coordination. Final support design should also consider the project specification, contents, insulation, fittings, valves, operating conditions, support arrangement, and applicable engineering review.
Is the DWG file sufficient for fabrication?
No. The DWG is a reference resource and should be checked against approved project drawings, specifications, connection details, and actual material documentation before fabrication or field use.