The suitable pressure for welded steel pipe depends on the specific application. Generally speaking, the suitable pressure for ordinary welded steel pipe should be below 1.6 MPa and is suitable for steam, condensate, and hot water pipes with temperatures below 200°C. For applications requiring higher pressures and temperatures, such as steam or hot water pipes exceeding 200°C, seamless steel pipes with higher pressure ratings may be required.1. Suitable Pressure Range for Wel...