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Blind or Target flange.


Used to close off completely a flanged end or outlet connection.  

API Specified 6B Weld Neck Flanges have restricted bores to match standard pipe sizes and schedules.


API Spec 6A  Specified, 6 BX Weld Neck Flanges, have material and dimensions that conform to the requirements for full bore integral flanges.


API Spec 6A does not specific portions of the flange, with tolerance, that are added together, along with an undefined weld bevel, to achieve a length.


Customers may specify weld neck length if requred 


Test Flange


A hole drilled and tapped into a Blind or Target flange which may allow application or pressure or attachment of a gauge.  

Adapter Flanges in all sizes and pressure ratings.


Popular Adapter Flanges are Double studded adapter flanges, companion flanges, flange with union adapters.


Customers may use Adapter Flanges for transition in nominal size and/or pressure rating.


  • Petrotrim Services can provide a wide range of Flanged or Studded connections, which includes, Double Sided Adapters (DSA's), Blinds, Tests, Targets, Adapter Flanges, Unions and Welding Necks.


  • All equipment conforming to API, in line with specific Customer Requirements.


  • Ring Grooves can be inlayed with a variety of stainless steels and high Nickel Alloys.


  • Manufactured per API-6A PSL-1 thru PSL-3. Sour Service is available and all H2S service parts conform to the

           latest NACE specifications.


The difference between ASME/ANSI and API flanges is the fabrication material and the higher rated API operating pressure.


ASME/ANSI flanges are common in industrial process systems handling water, steam, air and gas.


API flanges are manufactured for high strength operating refinery systems with products such as oil and explosive gases.


The flange standards API 6A and ASME/ANSI B16.5 are similar dimensionally - but the API 6A flanges are rated for higher pressures.