Titanium flange, fitting, fasteners and precision-machined components under inspection

Titanium technical resource | standards & applications

Titanium Flange Types: Weld Neck, Slip-On, Blind, Socket, Threaded and Lap Joint

Compare six common titanium flange types by connection, geometry, piping use, dimensional standards and RFQ requirements.

  • Standards-aware sourcing guidance
  • Grade and application comparisons
  • Inspection and RFQ considerations
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Titanium Flange Types: Weld Neck, Slip-On, Blind, Socket, Threaded and Lap Joint

Titanium flange type is a functional design choice, not only a product name. Weld neck, slip-on, blind, socket weld, threaded and lap joint flanges connect or close piping in different ways. The piping code, project specification, design conditions and mating components determine which type is acceptable.

Titanium lap joint flanges and matching stub end

Titanium Flange Type Comparison

Type Connection or purpose Key RFQ data
Weld neck Butt welded through a tapered hub Bore/schedule, bevel and hub
Slip-on Slides over pipe and is fillet welded Pipe OD clearance and weld arrangement
Blind Closes a flanged end Thickness, facing and any tapped opening
Socket weld Pipe inserts into an internal socket Socket bore/depth, pipe OD and root gap
Threaded Internal pipe thread, no flange-to-pipe weld Thread form, gauge and engagement
Lap joint Backing flange rotates behind a stub end Stub-end lap, bore radius and compatibility

Material and Dimensions Are Separate Specifications

ASTM B381 / ASME SB381 may govern titanium forgings. ASME B16.5, EN, DIN, JIS or a project drawing may govern dimensions, pressure class or PN and facing. State both systems rather than assuming one standard supplies every requirement.

Specify Facing and Mating Components

Define raised face, flat face, ring-type joint or drawing-specific facing, finish and gasket. Include the mating flange, pipe or stub-end dimensions and bolt pattern so the complete joint can be checked.

Grade Selection Depends on Service

Grade 2, Grade 5, Grade 7 and Grade 12 have different strength, fabrication and corrosion characteristics. Grade must follow service chemistry, design temperature, pressure, piping code and project approval.

Select the Connection Type Before Requesting a Quote

Review weld neck, slip-on, blind, socket weld, threaded and lap joint titanium flanges.

RFQ Checklist

  • Flange type and titanium grade
  • Material and dimensional standards
  • NPS/DN and Class/PN
  • Facing and finish
  • Bore, hub, weld end, socket, thread or stub-end details
  • Quantity, NDE and certificates
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