pre-insulated pipes meet all of the requirements of European standards EN 253, EN 448, EN 488 and EN 489. Pipe operating parameters: We can produce Pre-insulated/Thermal Insulation Steel Pipes: Insulation Standard: EN 253 Standard: API 5L, ASTM A53/A106/A333, EN 10216-2 P235GH/P265GH OD: 21.3 - 813mm Length: 5.8m, 6m, 11.8m, 12m The maximum operating temperature is 142°C (150°C on a short-term basis) for a maximum operating overpressure of 2.5 MPa with a service life of 30 years. Pipes with PUR foam insulation with an increased thermal resistance of up to 165°C can be supplied on request.