... Insulating joint (Isolating Joint) is the key component in Cathodic Protection (CP) System. It is mainly used in underground gas transition and distribution ... Gr. B, X42, X52, X60, X65, X70, etc.Ø Pressure rating: ANSI Class 150, Class 300, Class600, Class 900, Class1500 ... Testing: * Hydrostatic test: 1.5 times MOP (Max. Operation Pressure).* Electrical Resistance: >= 20Mohm @ 1000v DC under dry air at ...