Joining, flanges and sealing
Industrial flanges
Flange type, size, class, facing, material, pipe schedule and drilling must be checked as an assembly with gasket and bolting.
Type and construction
Available types
1
Weld neck flange
View details2Slip-on flange
View details3Blind flange
View details4Socket-weld flange
View details5Threaded flange
View details6Lap-joint flange
View details7Long weld neck flange
View details8Orifice flange
View details9Reducing flange
View details10Large-diameter Series A
View details11Large-diameter Series B
View details12European-standard flange
View details13Wellhead flange
View detailsQuick comparison
How the main types differ in selection
TypePurposeBest suited toWatchpoint
Weld neck flangeCreating a detachable joint between piping, valves and equipmentLocations requiring assembly, inspection or periodic maintenanceStandard, class, material group, facing, gasket and bolting
Slip-on flangeCreating a detachable joint between piping, valves and equipmentLocations requiring assembly, inspection or periodic maintenanceStandard, class, material group, facing, gasket and bolting
Blind flangeClosing a line end or providing positive isolationLine ends, future tie-ins, testing or maintenanceTrapped pressure, venting, safe removal procedure and wall thickness
Socket-weld flangeCreating a detachable joint between piping, valves and equipmentLocations requiring assembly, inspection or periodic maintenanceStandard, class, material group, facing, gasket and bolting
Threaded flangeCreating a detachable joint between piping, valves and equipmentLocations requiring assembly, inspection or periodic maintenanceStandard, class, material group, facing, gasket and bolting
Lap-joint flangeCreating a detachable joint between piping, valves and equipmentLocations requiring assembly, inspection or periodic maintenanceStandard, class, material group, facing, gasket and bolting
Long weld neck flangeCreating a detachable joint between piping, valves and equipmentLocations requiring assembly, inspection or periodic maintenanceStandard, class, material group, facing, gasket and bolting
Orifice flangeCreating a detachable joint between piping, valves and equipmentLocations requiring assembly, inspection or periodic maintenanceStandard, class, material group, facing, gasket and bolting
Reducing flangeRegulation of upstream or downstream pressure within a required rangeSteam, gas, water and process networks with varying demandPressure ratio, cavitation, noise and minimum-to-maximum flow
Large-diameter Series ACreating a detachable joint between piping, valves and equipmentLocations requiring assembly, inspection or periodic maintenanceStandard, class, material group, facing, gasket and bolting
3 additional types above have their own detail pages.
Before selection
Information to define
- 1Standard and class
- 2Nominal size
- 3Facing
- 4Material and grade
- 5Pipe schedule
- 6Drilling and dimensions
Typical materials
Carbon steelStainless steelAlloy steelLow-temperature steel
Typical connections
WeldedThreadedSocketLoose/lap
Typical media
All piping services
Function
What does this family do?
Joining and sealing
Creating welded, threaded, flanged or mechanical joints with compatible sealing
Functional selection guideIsolation and shut-off
Full flow shut-off for operation, maintenance or process safety
Functional selection guideMeasurement and monitoring
Local indication or signal transmission for pressure, temperature, level and flow
Functional selection guideTechnical reference
Related standards
The exact edition and requirements must be checked against the project specification.
ASME B16.5ASME B16.47ASME B16.36API 6AEN 1092-1BS 10
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Related families
Engineering note
This page supports initial screening and does not replace engineering calculations, project specifications, manufacturer approval or design pressure-temperature checks.
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