Piedmont Style HS Grooved Coupling With Duplex Hardware
Ideal for ultra-high-pressure RO systems, HPB Energy Recovery turbochargers, high pressure sides of ERD (Energy Recovery Devices), ZLD
(Zero liquid discharge) systems. Housing – Duplex or Superduplex stainless steel type CE8MN (UNS # J93345) conform to ASTM A995, Grade 2A requirements. Piedmont also offers this coupling in superduplex type CE3MN (UNS # J93404) conform to ASTM A995, Grade 5A requirements for higher resistance to corrosion. Other alloys are also available; contact Piedmont for details. Gaskets – EPDM rubber, suitable for hot and cold water services. Two shapes of gaskets are available: C-shaped or Flush-fit. NSF/ANSI 61 approved or equivalent (FDA) for drinking water system components. Not suitable for petroleum service. Other materials are also available, contact Piedmont for
Hardware (Bolts / Nuts / Washers)
– Hardware components are iso-metric thread type
– Bolts are round-head oval neck track bolts (own design)
– Nuts are according to DIN-934 (ISO-4032).
– Washers are according to DIN-125-1 (ISO 7089).
Sizes are 3/4″- 4″ 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.
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.
Piedmont Style HS Grooved Coupling Technical Information