Wrought Pipe Fitting dimensions are always in line with connecting pipe dimensions.
- Pipe Fittings are sized with respect to pipe size. In Nominal pipe size (NPS) & also as a Diameter nominal (DN)
- Thicknesses are marked in schedule no. Fittings generally have a higher thickness than the pipe to avoid any rejection due to thickness reduction during manufacturing. To avoid mismatch of fittings ID to pipe ID, manufacturer bevel the inside edge of fittings.
Forged Pipe Fittings are classified based on its pressure-temperature class
- Socket weld & Threaded end fittings are available from NPS 1/8” to 4” size
- Forged Fittings are available in following pressure-temperature rating class
- 2000 (Only Threaded Fittings)
- 3000 & 6000 (for both types)
- 9000 (Only Socket Weld Fittings)
The standards used to check Dimensions of Pipe Fittings
- For Wrought Product (WP) Dimension is covered in
- ASME B16.9- which is standard for Factory-made Wrought Butt-welding Fittings for size NPS 1⁄₂ to NPS 48” and
- And B16.28- which is standard for Wrought Steel Butt-Welding Short Radius Elbows and Returns for size NPS 1⁄₂ to NPS 24”
- For Forged Fittings Dimension are covered in
- ASME B16.11- a standard for Forged Steel Fittings that covers Socket Welding and Threaded fittings
What to Check During Fittings Dimension Inspection?
Following to be confirmed during inspection of pipe fitting dimensions
- Diameter
- Length
- Thickness schedule no
- Straightness & perpendicularity of the fittings ends
- Degree of elbows & bends
- And Concentricity of reducer
Check the following pages for the Pipe Fitting Dimensions and Tolerance
- Pipe Elbow Dimensions (Long Radius and Short Radius Elbow)
- Long Radius Return Dimensions (Long Radius Pipe Bends)
- Pipe Tee Dimensions
- Concentric Reducer Dimensions and Eccentric Reducer Dimensions
- Stub End Dimensions
- Pipe Coupling Dimensions
