LABELLED FRONT VIEW
ASME flange
*Enter the specified pipe wall thickness to calculate the matching bore. Controlled T, X and Y profile dimensions are shown below for supported flange types.
STEEL GEMS
DIMENSIONS & DRAWINGS
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PHASE 1 · FLANGES
Find flange drilling dimensions visually.
Select the pressure class and nominal size to see a labelled front view, dimensional values and a complete comparison table.
Buying flanges for a project?
Send the flange type, grade, NPS/DN, class or PN, facing, quantity and delivery location. Steel Gems reviews the specification before quoting.
Choose flange specifications → · Upload drawing / request quote → · Email your requirement →
Mumbai, India · Domestic & export enquiries. Drilling references are not engineering or compatibility approvals. Offered origin, stock, inspection and delivery confirmed in writing.
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Nominal size
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Metric designation
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Flange OD (D)
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Bolt circle / PCD (K)
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Bolt-hole diameter (d)
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Number of holes
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Nominal bolt diameter
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Standard
ASME B16.5
Engineering caution: Reference drilling dimensions only. Verify the governing edition, material group, pressure-temperature rating, facing, bore, tolerances and project specification before manufacture or purchase.
PHASE 1B · TYPE-SPECIFIC PROFILE
LIVE PROFILE
Weld Neck side view
Calculated matching bore
Enter wall thickness
Pipe OD − (2 × nominal wall)
Controlled ASME profile dimensions
T · Flange thickness
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X · Hub diameter
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Y · Length through hub
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Verified dimensional values for the selected class, size and flange type.
T Flange thickness
X Hub diameter
Y Length through hub
B Schedule-dependent bore
PHASE 1D · PARAMETRIC VISUAL
360° LIVE MODEL
Interactive flange model
Select any flange type, then drag to rotate. The model, applicable geometry and dimensions update with class, size and bore.
COMPLETE CLASS TABLE
Class 150 dimensions
| NPS / NB | DN | Flange OD | PCD | Hole Ø | Holes | Bolt Ø |
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Built to expand without clutter.
OD, PCD, hole diameter, hole count and bolt size for Classes 150 and 300.
Type-specific profiles now include controlled T, X and Y dimensions with schedule-dependent bore calculation.
Classes 400, 600, 900, 1500 and 2500 are now available with their applicable size ranges.
Weld Neck, Slip On, Blind, Socket Weld, Threaded and Lap Joint models with synchronized dimensions.