Howrah Pipe Fitting Store

• Key Specifications:

  1. Material:

     • Mild Steel (ASTM A105, ASTM A36, or equivalent).

     • Mild steel is not suitable for high-temperature or highly corrosive environments.

  2. Pressure Class:

     • #150 (150 PSI at ambient temperature).

     • The pressure rating decreases as the temperature increases.

  3. Flange Types:

     • Common types include:

       • Weld Neck Flange (WN)

       • Slip-On Flange (SO)

       • Blind Flange (BL)

       • Socket Weld Flange (SW)

       • Threaded Flange (TH)

       • Lap Joint Flange (LJ)

  4. Dimensions:

     • Dimensions are standardized by ASME B16.5 for flanges up to 24 inches in diameter.

     • Key dimensions include:

       • Outer Diameter (OD)

       • Bolt Circle Diameter (BCD)

       • Number of Bolt Holes

       • Bolt Hole Diameter

       • Thickness

       • Hub Diameter (for weld neck flanges)

  5. Facing:

     • Raised Face (RF): Most common, typically 1/16" for #150 flanges.

     • Flat Face (FF): Used for low-pressure applications or when mating with flat surfaces.

     • Ring-Type Joint (RTJ): Used for high-pressure applications.

  6. Bolt Holes:

     • The number and size of bolt holes depend on the flange size and pressure class.

     • Example: A 6-inch #150 flange typically has 8 bolt holes.

  7. Standards:

     • ASME B16.5: Pipe Flanges and Flanged Fittings.

     • ASTM A105: Standard Specification for Carbon Steel Forgings for Piping Applications.

     • ASTM A36: Standard Specification for Carbon Structural Steel.

  8. Surface Finish:

     • Typically smooth or serrated finish for the sealing surface.

  9. Applications:

     • Used in low-pressure piping systems, water lines, and general industrial applications.

     • Not suitable for high-temperature or corrosive environments unless coated or lined.

  Example Dimensions for a 6-inch #150 Flange (ASME B16.5):

  • Outer Diameter (OD): 15.0 inches

  • Bolt Circle Diameter (BCD): 12.75 inches

  • Number of Bolt Holes: 8

  • Bolt Hole Diameter: 0.88 inches

  • Thickness: 0.94 inches

  • Raised Face Height: 0.06 inches

  Notes:

  • Always verify the specific requirements for your application, including temperature, pressure, and fluid compatibility.

  • Mild steel flanges may require protective coatings or linings for corrosive environments.

  • Ensure proper gasket selection and bolt tightening procedures for leak-free performance.

Additional Information:

• Delivery Time: 15mm to 600 mm ready stock