This reference brings together the dimensional, weight, terminology, and application information needed to review Schedule 5S Pipe 3 1/2 Inch (DN90 mm). Use the table and data list below when checking a piping layout, preparing a material takeoff, coordinating a spool, or comparing stainless steel pipe schedules.
The page also explains how nominal size, outside diameter, inside diameter, wall thickness, and pipe weight relate to one another. For drafting workflows, the accompanying DWG resource can support preliminary CAD coordination; final fabrication and installation details should be checked against the project documents and applicable requirements.
Schedule 5S Pipe 3 1/2 Inch (DN90 mm) is a stainless steel pipe size commonly used in industrial piping systems where corrosion resistance and lighter wall thickness are required. This pipe size is typically referenced under ANSI/ASME B36.19, which is the standard used for stainless steel pipe dimensions.
For this size, the pipe has an outside diameter (OD) of 101.6 mm, an inside diameter (ID) of 97.38 mm, and a wall thickness of 2.11 mm. The listed pipe weight is 5.18 kg/m, while the weight including water is 12.62 kg/m.
Schedule 5S Pipe 3 1/2 Inch (DN90 mm) Dimension Table
| Pipe Size | NPS | DN | Outside Diameter (OD) | Inside Diameter (ID) | Wall Thickness | Weight |
|---|---|---|---|---|---|---|
| Schedule 5S Pipe | 3 1/2 Inch | DN90 | 101.6 mm | 97.38 mm | 2.11 mm | 5.18 kg/m |
What Is Schedule 5S Pipe?
Schedule 5S is a thin-wall stainless steel pipe schedule listed in ASME B36.19. The āSā designation is commonly used for stainless steel pipe schedules. Compared with heavier schedules, Schedule 5S provides a lighter wall thickness and lower pipe weight, which can help reduce handling effort, support load, and fabrication requirements in suitable applications.
However, pipe schedule selection should always be reviewed against design pressure, temperature, corrosion allowance, project code, and service conditions before final use.
3 1/2 Inch Schedule 5S Pipe Data
- Standard: ANSI/ASME B36.19
- Pipe Type: Stainless Steel Pipe
- NPS: 3 1/2 Inch
- DN: DN90
- OD: 101.6 mm
- ID: 97.38 mm
- Wall Thickness: 2.11 mm
- Pipe Weight: 5.18 kg/m
- Weight Including Water: 12.62 kg/m
Common Uses of 3 1/2 Inch Schedule 5S Pipe
3 1/2 inch Schedule 5S stainless steel pipe may be used in applications where corrosion resistance, lighter wall thickness, and good flow capacity are needed. Typical uses may include:
- Water treatment and utility piping systems
- Industrial stainless steel process lines
- Low-pressure transfer piping
- Food and beverage production systems
- Chemical and general fabrication projects
Why DN90 Pipe Dimensions Matter
Many users search for DN90 pipe dimensions to verify piping layout, support spacing, fabrication requirements, transport limits, and compatibility with fittings or connected equipment. For this pipe size, accurate dimensions are important for spool coordination, structural checks, and installation planning.
Knowing the correct 3 1/2 inch Schedule 5S pipe dimensions also helps engineers, designers, estimators, buyers, and students compare this size with other schedules when reviewing wall thickness, internal flow area, and total pipe weight.
NPS 3 1/2 and DN90 Explained
NPS stands for Nominal Pipe Size in inches, while DN stands for Diameter Nominal in metric designation. For this pipe size:
- NPS 3 1/2 = inch-based nominal pipe size
- DN90 = metric nominal designation
Although DN is shown in metric form, the actual outside diameter should always be checked from the dimensional standard. For this size, the OD is 101.6 mm.
Reference for Schedule 5S Pipe 3 1/2 Inch
This page provides a quick dimensional reference for engineers, piping designers, students, fabricators, and procurement teams looking for Schedule 5S Pipe 3 1/2 Inch (DN90 mm) data in a clear format.
Reference Standard: ANSI/ASME B36.19 stainless steel pipe dimensions.
How to Read the Schedule 5S Pipe Data
The dimensional entries describe different aspects of the same pipe. Outside diameter is important for fit-up, clamps, supports, clearances, and connections. Inside diameter is used when reviewing flow passage, lining or coating allowances, and equipment interfaces. Wall thickness helps identify the selected schedule and is relevant to mechanical and corrosion-resistance reviews.
The listed pipe weight is a dry pipe reference expressed per unit length. The separate water-inclusive value represents the pipe together with the water occupying its internal passage. Keeping these values distinct is useful when estimating support reactions, handling requirements, shipping loads, and operating conditions.
Schedule, Size, and Connection Coordination
NPS 3 1/2 and DN90 are nominal designations rather than a direct statement of the measured outside diameter. When coordinating fittings, flanges, valves, supports, or equipment nozzles, use the dimensional values in the source table and confirm that the connected components use compatible standards and end details.
Schedule 5S identifies a stainless steel pipe wall category. It does not, by itself, establish an allowable pressure, temperature limit, corrosion life, material grade, or complete design basis. Those decisions require review of the service fluid, temperature, pressure, joining method, corrosion environment, governing code, and project specifications.
Using the DWG Reference
The downloadable DWG can be useful for preliminary layout, section identification, and drawing coordination. Treat downloaded geometry as a drafting aid rather than a substitute for the authoritative dimensional table or approved project drawings. Check units, layer conventions, connection details, and revision status before incorporating the file into a controlled design package.
Related Pipe Reference Topics
- Compare this entry with other stainless steel pipe schedules when reviewing wall thickness and weight.
- Review NPS and DN pipe size terminology before matching nominal sizes across drawings and procurement documents.
- Use related pipe fittings and flange dimensions pages to coordinate connection interfaces.
- Browse the pipe CAD and DWG reference library for additional drafting resources.
Frequently Asked Questions
What does Schedule 5S mean?
Schedule 5S is a stainless steel pipe schedule associated with a relatively light wall category. The schedule identifies dimensional wall information; it does not independently define the pipe material grade or confirm suitability for a particular service.
Is DN90 the measured outside diameter?
No. DN90 is a nominal metric designation. The measured outside diameter should be taken from the dimensional data for the pipe size rather than inferred from the DN label.
What is the difference between pipe weight and weight including water?
Pipe weight refers to the pipe itself per unit length. Weight including water adds the mass of water contained within the internal passage, which can be relevant to operating-load and support reviews.
Can this pipe be used for any low-pressure system?
Not automatically. Application suitability depends on pressure, temperature, fluid, corrosion conditions, material specification, joining details, and the governing project requirements. A qualified engineer should verify the selection.
What should be checked before connecting fittings or flanges?
Confirm the outside diameter, wall thickness, nominal size, component standard, pressure class where applicable, facing or end type, material compatibility, and project-specific connection requirements.
What is the DWG file useful for?
The DWG is intended as a CAD reference for preliminary layout and coordination. Verify its units and geometry against the source data and approved drawings before using it for fabrication or construction.