Product Name: API 5L X52 PSL2 Insulation Joint
Design Standard: ANSI B31.4
Material: Carbon Steel API 5L X52 PSL2
Size: 6 Inch, DN150
Pressure Rating: Class 600 LB, PN100
Wall Thickness: SCH STD

Source: https://www.landeepipefitting.com/api-5l-x52-psl2-insulation-joint-6-inches-600-lb-sch-std.html