Class 600 High Pressure Stainless Steel Plate Flange ASTM A182 F316 for Industrial Pipelines

Our Class 600 stainless steel plate flanges represent the high-pressure tier in our comprehensive pressure class range. Forged from ASTM A182 F316 with substantially thicker wall sections, larger bolt circles, and increased bolt counts, these flanges deliver a maximum working pressure of 1,480 psi at ambient temperature.

Designed for the most demanding process industry applications, they provide the safety margin and structural integrity required for high-pressure hydrocarbon service, superheated steam, high-pressure gas, and critical chemical transfer lines. ANSI B16.5 Class 600 compliant with full material traceability.

• Class 600 High-Pressure Rating: Maximum allowable working pressure of 1,480 psi (102.0 bar) at 100°F, more than 5x the capacity of Class 150 for the most demanding industrial pressure requirements
• Heavy-Duty Wall Thickness: Significantly thicker flange body and larger bolt diameters compared to lower classes provide the structural mass required for safe pressure containment under cyclic loading
• Multi-Grade Material Portfolio: Available in F316, F316L, F321 (titanium-stabilized), and Duplex F51 grades to match specific corrosion, temperature, and mechanical requirements
• Enhanced Bolt Pattern: Larger bolt circle diameter and increased bolt count (typically 8-20 bolts depending on size) provide superior gasket seating force for high-pressure seal integrity
• Critical Service Ready: RTJ facing option with NACE MR0175/ISO 15156 compliant materials available for sour service in oil and gas applications

• Oil and gas production flowlines and wellhead connections
• High-pressure steam boiler feedwater and superheated steam lines
• Chemical reactor feed and discharge piping
• Hydrogen and syngas high-pressure transfer systems
• Hydraulic power unit and accumulator connections
• Refinery high-pressure hydroprocessing units
• Gas compression and pipeline booster stations

ISO 9001:2015 certified facility. All Class 600 flanges undergo PMI, comprehensive dimensional inspection, and NDE options including PT, UT, and Radiography. EN 10204 3.1/3.2 certificates and pressure test reports provided as required.