stainless steel coupling which is used in above ground application has a collar of stainless steel to EN10088 and has a joint sleeve of EPDM elastomer to EN681(ISO 4633).
The couplings could be made in different combinations of collar and bolts in materials of AISI 304 or AISI 316.
The couplings are come with electrical continuity clip, which allows electrical continuity between two cast iron pipes.
The properties of EPDM sealing gasket is for water tightness at an internal pressure of 0.5 bar effects of thermal cycling ease of jointing. The max. pressures in a restrained situation is 5.0 bar.
Post time: Oct-15-2021