Special Flanges — Custom-Engineered Solutions for Unique Piping Applications

Special Flanges are designed and manufactured to meet non-standard dimensions, materials, or design requirements where conventional flanges such as slip-on, welding neck, or socket weld types may not be suitable. These flanges are typically used in critical applications, custom systems, or specialized industries that demand unique configurations to match exact engineering specifications.

Standards & Design Options

While many special flanges follow ASME B16.5, ASME B16.47, or DIN / EN 1092-1 as a base reference, they are often custom-engineered to meet project-specific requirements. Examples include:

Special Drilling Patterns — Non-standard bolt circles or hole alignments for unique equipment connections.
Modified Facing Types — Such as Large Male–Female (LMF), Tongue-and-Groove (T&G), or custom RTJ grooves.
Combination Flanges — e.g., spectacle blinds, spade & spacer sets, swivel flanges, and orifice flanges.
Special Alloys & Coatings — For high-temperature, corrosive, or offshore environments.

Key Features

Tailor-Made Design — Developed to meet exact engineering, dimensional, or operational requirements.
Wide Range of Configurations — Available as spectacle blinds, orifice flanges, swivel flanges, long weld neck flanges, and more.
Compliance with International Standards — Designed in accordance with ASME, DIN/EN, ISO, or customer specifications.
Material Versatility — Manufactured in carbon steel, stainless steel, duplex, super duplex, nickel alloys, or other special materials.
Precision Machining — Ensures reliable fit, alignment, and sealing for critical service.

Typical Dimensions

Size Range: DN 10 to DN 2000 (½” to 80”) and above, depending on project requirements
Pressure Ratings: ASME Class 150 to 2500 / PN6 to PN400 or custom
Facing Types: RF, FF, RTJ, T&G, LMF, or fully customized designs
Drilling Patterns: Standard or special bolt hole arrangements as per engineering drawings