Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

# SDR (Standard Dimension Ratio) and S Pipe Series

## The Standard Dimension Ratio - SDR - is used to rate pressure pipes.

### Standard Dimensions Ratio - SDR

Many plastic pipe manufacturers use the "Standard Dimension Ratio" - SDR - method of rating pressure piping. The SDR is the ratio of pipe diameter to wall thickness and the SDR can be expressed as

SDR = D / s                                 (1)

where

D = pipe outside diameter (mm, in)

s = pipe wall thickness (mm, in)

#### Example - SDR

SDR for a 10 inches ASTM D2241 - PVC Pipe with outside diameter 10.750 inches and wall thickness 0.168 inches can be calculated as

SDR = (10.750 in) / (0.168 in)

= 64

A SDR 64 means that the outside diameter - D - of the pipe is 64 times the thickness - s - of the wall.

• with a high SDR ratio the pipe wall is thin compared to the pipe diameter
• with a low SDR ratio the pipe wall is thick compared to the pipe diameter

As a consequence a high SDR pipe has a low-pressure rating and low SDR pipe has a high-pressure rating.

### Pipe Series - S

Pipe series - S - is a dimensionless number related to the nominal outside diameter and wall thickness of a pipe. The pipe series - S - can be calculated as

S = (SDR - 1) / 2                        (2)

where

S = pipe series

## Related Topics

• ### Dimensions of Pipes and Tubes

Pipe, tube and fittings sizes and dimensions. Inside and outside diameters, weights and more.
• ### Fluid Flow and Pressure Loss in Pipes and Tubes

Fluid flow and pressure loss in pipe lines. Water and sewer systems. Steel pipes, pvc pipes, copper tubes and more.
• ### Pressure Ratings of Pipes and Fittings

Pressure ratings of pipes and tubes and their fittings - carbon steel , stainless steel, plastic, copper and more.

## Related Documents

• ### ASTM D2241 - Poly(Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series) - Dimensions

Dimensions of PVC pipe SDR series.
• ### ASTM D2513 - Thermoplastic Gas Pipes - Dimensions

Dimensions of thermoplastic pressure pipes.
• ### ASTM D3035 - Polyethylene PE pipes - dimensions

Dimensions of PE pipes based on controlled outside diameter.
• ### Bending PE Pipes

Bending PE pipe calculator.
• ### EN 12201 - Polyethylene (PE) Pipes for Water Supply, and for Drainage and Sewerage under Pressure - Dimensions

Dimensions of PE pipes according EN 12201.
• ### EN 1452 - Unplasticized Poly Vinyl Chloride (PVC-U) - Dimensions

Dimensions of PVC-U pipe according EN 1452.
• ### ISO 11922 - Thermoplastics Pipes for the Conveyance of Fluids - Dimensions

Dimensions of plastic pipes according ISO 11922 - metric and imperial units.
• ### ISO 161 - Thermoplastics Pipes - Dimensions

Dimensions of thermoplastic pipes according ISO 161.
• ### ISO 4427 - PE Pipes for Water Supply - Dimensions

Polyethylene pipe dimensions according European Standards.
• ### ISO 4437 - PE Pipes for Gaseous Fuels Supply - Dimensions

Dimmensions of PE pipes for gaseous supply according ISO 4437.
• ### PE (PolyEthylene) Pipes - PN Pressure Grades

Polyethylene - PE - pipes and pressure classes.
• ### PE (PolyEthylene) Pipes - Pressure Loss vs. Water Flow

Water flow in SDR pressure rated PE-pipes - pressure loss and velocities - Imperial and SI units.
• ### PE (PolyEthylene) Pipes - Pressure Ratings vs. Size

Water pressure ratings for schedule 40 and schedule 80 Polyethylene plastic pipes
• ### PE (PolyEthylene) Pipes - Pressure vs. Temperature Ratings

Polyethylene pipe temperature and maximum operating pressure.
• ### PE - Polyethylene High Density Pipes - Weights

Weight of polyethylene pipes - metric units.
• ### PE Polyethylene - Chemical Resistance

Chemical resistance of Polyethylene - PEH - to common products.
• ### PE, PEH and PVC Pipes - Pressure Loss vs. Water Flow Diagram

Pressure loss (bar/100 m) and velocy in PE, PEH or PVC pipes with water flow.
• ### Pipes - Nominal Wall Thickness

Nominal wall thickness of seamless and welded carbon and alloy steel pipes
• ### Pipes and Tubes - Imperial vs. Metric Sizes

SI vs. Imperial pipe sizes.
• ### Plastic Pipes - Friction Head Loss vs. Water Flow

Friction head loss (ft/100 ft) vs. water flow in plastic pipes like PVC, PP, PE or PEH.

## Search

Search is the most efficient way to navigate the Engineering ToolBox.

## Engineering ToolBox - SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp Make/Pro from the Extension Warehouse !

We don't collect information from our users. More about

We use a third-party to provide monetization technologies for our site. You can review their privacy and cookie policy here.

You can change your privacy settings by clicking the following button: .

## Citation

• The Engineering ToolBox (2006). SDR (Standard Dimension Ratio) and S Pipe Series. [online] Available at: https://www.engineeringtoolbox.com/sdr-standard-dimension-ratio-d_318.html [Accessed Day Month Year].

Modify the access date according your visit.

5.16.12

.