Stainless Steel Plate Flange Class 150 with ASTM A182 F304 Material and ANSI B16.5 Standard for Low Pressure Industrial Piping

Our Class 150 stainless steel plate flanges represent the most economical entry point in our pressure class range, engineered for reliable performance in low-pressure industrial piping systems. Forged from ASTM A182 F304 stainless steel, these flanges deliver excellent general corrosion resistance at a competitive price point.

ANSI B16.5 Class 150 rated with a maximum working pressure of 285 psi at ambient temperature, they are the ideal solution for municipal water distribution, HVAC hydronic systems, fire protection piping, and light industrial fluid transfer.

• Class 150 Pressure Rating: Maximum allowable working pressure of 285 psi (19.6 bar) at 100°F per ASME B16.5, covering the vast majority of low-pressure industrial and commercial piping requirements
• Cost-Optimized Design: Slimmer flange profile with reduced material usage compared to higher classes delivers excellent value for applications where high-pressure capability is not required
• F304 General Service Grade: 18/8 chromium-nickel stainless steel provides effective corrosion resistance for water, mild chemicals, food products, and atmospheric exposure
• Broad Size Availability: Full DN15-DN600 range covers everything from small instrumentation lines to plant-scale distribution headers within the Class 150 envelope
• Multiple Facing Options: Available in RF and FF facing configurations to match your existing piping standards and gasket preferences

• Municipal potable water and wastewater treatment piping
• Commercial HVAC chilled water and condenser water loops
• Fire protection sprinkler risers and mains
• Food and beverage transfer and CIP return lines
• Low-pressure compressed air and nitrogen distribution
• Irrigation and agricultural water supply networks

ISO 9001:2015 certified production. Every Class 150 flange undergoes PMI verification, dimensional inspection, hydrostatic shell testing when specified, and final visual examination. EN 10204 3.1 MTRs provided as standard.