Numerical Simulation of Sleeve Repair Welding on In-service 16Mn Crude Oil Pipelines
The purpose of this study is to investigate the effects of welding conditions on the risk of burn-through and HIC during in-service welding on 16Mn crude oil pipelines. Based on the SYSWELD software, an axisyrnmetric finite element model was used to calculate the temperature distribution, maximum HAZ hardness, and the distribution of residual stress during muitipass sleeve fillet welding on in-service oil pipelines of 8 mm thickness under different welding conditions. The effects of welding conditions on risk of bum-through and HIC have been studied by the orthogonal test method and the allowable range of heat input under different pipe thicknesses have also been determined. The results show that: 1) heat input and pipe thickness have much more effects on the risk of burn-through and susceptibility to HIC during in-service welding on 16Mn steel oil pipelines;2) peak temperature on the inner pipe surface and heat input are nearly in proportion to pipe thickness;3) there is an upper limit of heat input corresponding to a certain pipe thicknesses, under which burn-through will not occur during in-service wilding.
16Mn oil pipeline in-service welding numerical simulation
CEN Kang ZHANG Dongliang YIN Jiancheng
School of Civil Engineering and Architecture, Southwest Petroleum University, P.R.China Sichuan Northeast Natural Gas Field, Southwest Branch Company, CNPC, P.R.China
国际会议
成都
英文
407-411
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）