The MSS SP-44 standard covers steel pipeline flanges specifically designed for high-pressure oil and gas transmission. These "High-Yield" flanges are forged from high-strength carbon or low-alloy steel (e.g., F52 to F70) to withstand extreme stress. The RTJ (Ring Type Joint) facing features a machined groove for a metal ring gasket, ensuring a leak-proof, metal-to-metal seal under high-vibration and high-pressure conditions. They bridge the gap between standard ASME B16.5 and larger B16.47 flanges.
Technical attributes
Standard: MSS SP-44
Product Type: High-Yield Hub Flange
Facing Type: Ring Type Joint (RTJ)
Pressure Class: 150# to 900#
Nominal Size: 12" to 60"
Material Grades: F42, F52, F60, F65, F70
Yield Strength: 42,000 to 70,000 PSI
Manufacturing: Forged, Heat Treated
Seal Mechanism: Metal-to-Metal Ring Gasket
Groove Profile: Octagonal or Oval
Bore Type: Match Pipe Wall Thickness
Wall Thickness: Schedule specific (e.g., XS, SCH 80)
Connection: Butt-Weld Hub
Tolerance: Precise per SP-44 Specs
Inspection: UT, MPI, and Hardness Testing
Coating: Black Paint or Anti-rust Oil
Application: Natural Gas Pipelines
Compatibility: ASME B16.47 Series A
Contact: Jorge Yang
Phone: +86-13588258503
E-mail: sales@fluvalve.com
Whatsapp:+86-13588258503
Add: Room 331, South Building,Building 1, No.3 Jinpeng Street, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province
