... Manufacturer Certificate: ASME ISO9001 Detailed Product Description Monolithic Insulating joint 1)Material: CS,SS AS 2)Size:1/2"-60" 3 ... and U stamp Deatiled production description Monolithic Insulating joint1, Pup material: API 5L Gr.B, X42, X46, X52, X56, ... , CL150,CL200,CL300,CL600,CL900,CL1500,CL2500 Introduction:Insulating joint (Isolating Joint) is the key component in Cathodic Protection (CP) ...