Abstract: Interpreted in the article is China national standard，GB/ T 31936—2015 Rolls for Welding Steel Pipe. Described is the background for establishment of the standard. Analyzed are the characteristics of and selection principle for rolls for welded steel pipes. Briefed are the material of the forged roll and the cast roll for welded pipes as specified under the standard. And compared are the two types of rolls in terms of mechanical property， wear resistance and service life. Finally，the main technical indexes for rolls for the weld pipe are pointed out，and the testing methods and inspection regulations as specified under the standard are described.