44 inch ASME B16.47 Series B Flange Dimensions
44 inch (DN 1100) to ASME B16.47: OD 1275 mm; thickness 58.9 mm; hub 1153 mm; pipe OD 1120.6 mm; length 135 mm.
Key to dimensions
- O
- Outside diameter of flange
- tf
- Minimum thickness of weld neck and of blind flange, excluding the raised face
- X
- Hub diameter at base
- A
- Hub diameter at the welding end
- Y
- Length through hub, excluding the raised face
- R
- Diameter of raised face
- W
- Bolt circle diameter
- Holes
- Number and diameter of bolt holes
44 inch ASME B16.47 Series B Flange Dimensions — all dimensions
Series B Class 150 (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| DN | 1100 | |
| Outside dia — O | 1275 mm | 50.20 in |
| Weld neck — tf | 58.9 mm | 2.32 in |
| Blind — tf | 70.0 mm | 2.76 in |
| Hub dia — X | 1153 mm | 45.39 in |
| Hub at weld — A | 1120.6 mm | 44.12 in |
| Length thru hub — Y | 135 mm | 5.31 in |
| Raised face dia — R | 1181 mm | 46.50 in |
| Bolt circle — W | 1222.4 mm | 48.13 in |
| Number of holes | 52 | |
| Hole dia | 28.6 mm | 1.13 in |
| Bolt size | 1" |
Series B Class 300 (mm)
| Dimension | Value | Equivalent |
|---|---|---|
| DN | 1100 | |
| Outside dia — O | 1385 mm | 54.53 in |
| Weld neck — tf | 125.5 mm | 4.94 in |
| Blind — tf | 125.5 mm | 4.94 in |
| Hub dia — X | 1173 mm | 46.18 in |
| Hub at weld — A | 1125.5 mm | 44.31 in |
| Length thru hub — Y | 213 mm | 8.39 in |
| Raised face dia — R | 1219 mm | 47.99 in |
| Bolt circle — W | 1295.4 mm | 51.00 in |
| Number of holes | 40 | |
| Hole dia | 47.6 mm | 1.87 in |
| Bolt size | 1¾" |
Values are nominal, from ASME B16.47 Series B Flange Dimensions. Verify critical dimensions against the current edition of the standard before design, purchase or fabrication.
Find another size or standard
Pick a product, standard and size — or just type — to see every dimension and download a watermarked PDF for that one size.
FAQ
44 inch ASME B16.47 Series B Flange Dimensions: common questions
What are the 44 inch ASME B16.47 Series B Flange Dimensions?
44 inch (DN 1100) to ASME B16.47: OD 1275 mm; thickness 58.9 mm; hub 1153 mm; pipe OD 1120.6 mm; length 135 mm.
Does Teshi Group manufacture 44 inch flanges?
Yes. Teshi Group is an OEM manufacturer in India of flanges to ASME B16.47, in carbon, alloy, stainless, duplex, super duplex, nickel alloys, titanium and Cu-Ni, with EN 10204 3.1 certificates.
Can I download the 44 inch dimensions as a PDF?
Yes. Use “Download PDF for this size” on this page to get a single-size, print-ready PDF with the drawing and every tabulated dimension, or download the full ASME B16.47 Series B Flange Dimensions chart.
Need 44 inch flanges?
Teshi Group manufactures them in India — send your size, rating and material and get a quote in 24–48 hours.
Ready to build to spec?
Share your drawing, bill of materials or technical requirements with the Teshi team.