What are the main principles for choosing stainless steel butt weld flanges?


For pipes with a design temperature of 300 ° C and below and a nominal pressure of 2 or 5 MPa or less, a flat welding flange shall be used: for pipes with a design temperature greater than 300 ° C or a nominal pressure greater than or equal to 4, 0 MPa, stainless steel butt welding flange.