RIYANG pipe roller support, upto 630mmNov 6,2020 Daily sharing of RIYANG pipe roller support, which is a very necessary tool when you do butt welding.DOLPHIN 355: Pipe OD50 - 355mm, RIYANG patentedMANBA 630: Pipe OD315- 630mm, RIYANG patented Previous EXPONOR 2019, CHILENext RIYANG Basic Butt Fusion Machine V1000 worked in Peru