Piedmont Style F Grooved Coupling
Style F couplings incorporate the more noble, duplex-alloy construction, which although initially more expensive, offers the superior corrosion resistance and corresponding better longevity for highly corrosive environments compared to the Style K coupling which is constructed from 316 alloy. Consult Piedmont application engineering for guidance on the selection of plastic or metal alloy for your application.
Duplex or SuperDuplex* stainless steel type CE8MN, conform to ASTM A995 Grade 2A. Piedmont also offers this coupling style in CE3MN (Grade 5A) for even higher corrosion resistance
EPDM rubber gasket, suitable for hot and cold water service. NSF/ANSI 61 approved for drinking water system components. Not suitable for petroleum service.
Nuts and bolts are Round-head, square-neck, type 316 stainless steel bolts and heavy hex nuts conform to ASTM F-593 and 594, Group 2, condition CW.
Sizes are 3/4″- 16″ Nominal size pipe.
Duplex Duplex stainless steel is highly resistant to chloride corrosion because of its metallurgy and microstructure. Used for high pressure couplings for seawater installation our duplex alloy is made of two metallurgical phases with each their role to play in the efficiency of the couplings.
Austenite for nobility
Ferrite for strength
Note: Working pressure ratings based upon generally accepted pressure piping design standards and testing in accordance with ASME Section VIII Division 1 pressure vessel test method.