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

Source: https://www.landee.cn/ansi-b31-4-insulation-joint-api-5l-x52-psl2-6-inch-cl600.html