Control of Weld Bead Remaining-height of SSAW Pipe

Elaborated is the importance of controlling both inner and outer weld bread remaining-height of the SSAW linepipe.The bigger the weld bread remaining-height is,the bigger the weld stress concentration factor will be,thus the easier for the stress corrosion crack to develop.Big outer weld bread remaining-height will reduce corrosion prevention effectiveness,while big weld bread remaining-height will bring about more energy loss of the transport medium.The paper focuses on the problem of the so-called "saddle-shaped" inner weld bread of the SSAW pipe,emphasizing that at the foot of such kind of weld bread,the stress is enormously big,which is harmful to the pipe for transporting corrosive medium.To prolong the service life of the steel linepipe,it is necessary to properly control the said weld bread remaining-height.Based on relevant production practice,measures for control of the weld bread remaining-height of SSAW linepipe are proposed.