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随着海外市场的拓展,蒙古国塔木察格项目地面施工日渐完善,通过近3年来施工状况分析,蒙古塔木察格地处区气候属大陆性亚寒带型,无霜期在6至9月份,约越90至110天,最低气温达到-44～-38°C;降水量少,气候干旱;多年平均降水量为204.7～237.3mm;相对湿度为38～57%;平均风速为3.4～3.9米/秒,最高可达到16～24米/秒;覆雪时间平均为102天,最长可达到157～188天。由于受项目运行的多种制约,施工期一般在7至11月份,在低温环境下进行管道焊接施工量较大,通过分析在低温环境下影响焊接质量因素,制定相应焊接工艺保障焊接质量。
With the expansion of overseas markets, the ground construction of the Tarim Chago project in Mongolia has been gradually improved. According to the analysis of the construction conditions in the past three years, the Tarim Chaog area of Mongolia is located in a subambient zone of subtropical zone with frost-free period from June to September. About 90 to 110 days, the minimum temperature reached -44 ~ -38 ° C; less precipitation, arid climate; years of average rainfall of 204.7 ~ 237.3mm; relative humidity of 38 to 57%; average wind speed of 3.4 to 3.9 meters / Second, up to 16 ~ 24 m / s; the average time for snow cover is 102 days, the longest can reach 157 ~ 188 days. Due to various constraints of project operation, the construction period is generally from July to November. The quantity of pipe welding construction is large under low temperature environment. By analyzing the factors that affect welding quality under low temperature environment, the corresponding welding process is formulated to ensure the welding quality.