A standard grooved coupling specification covers mechanical pipe-joining components typically rated for 300 PSI (20.7 bar) working pressure, sized from 3/4 inch to 24 inch (DN20 to DN600), cast from ductile iron (ASTM A536) or stainless steel, and sealed with an EPDM gasket. Leading manufacturers like Victaulic provide comprehensive technical submittals for these systems. Key Technical Parameters • Sizes: 25 mm to 600 mm (1' to 24') nominal pipe size • Working Pressure: Up to 300 PSI (standard) or higher for specialized high-pressure/stainless variants (up to 600 PSI/42 bar) • Temperature Range: -30°C to +110°C (-20°F to 230°F) depending on gasket compound • Material Composition: Ductile iron conforming to ASTM A536 Grade 65-45-12, or CF8M (Stainless Steel) • Coatings: Hot-dipped galvanized, red/white rust-inhibiting paint, or epoxy finish Coupling Types • Rigid Couplings: Designed to prevent axial or angular movement, creating a stiff, beam-like joint comparable to welded or flanged connections. • Flexible Couplings: Allows controlled linear and angular deflection to accommodate thermal expansion, contraction, and seismic movement. Gasket Specifications • Grade E (EPDM): Green stripe code, rated for water, oil-free air, and dilute acids (-30°C to +110°C). • Grade T (Nitrile): Orange stripe code, rated for petroleum products, air with oil vapors, and specific chemicals. Compliance & Approvals • Standards: Designed in compliance with ASTM, ANSI/AWWA, and NFPA 13 requirements for fire protection and piping codes. • Certifications: UL Listed, FM Approved, and VdS/CE compliant for industrial and fire-water applications. If you need specific details, please tell me:The pipe size and material you are usingWhether you require a rigid or flexible connectionThe fluid type and temperature of your application