Welding technology for hydrogenation reactor end socket connecting pipe

加氢反应器封头接管焊接工艺

Abstract

The invention discloses a welding technology for a hydrogenation reactor end socket connecting pipe. The technology includes the steps of groove welding dry magnetic powder detecting, preheating, assembling and spot welding, outer groove union melt welding, outer groove welding and after-heating. The preheating temperature is larger than or equal to 200 DEG C, the interlayer temperature for outer groove welding is 200-250 DEG C, the after-heating temperature is 200-300 DEG C, the after-heating time is 2 h, the welding current is 500-550 A, the welding voltage is 28-30 V, and the welding speed is 360-400 mm/min. Equipment cost is low, the production efficiency is high, operation is simple and convenient, and the welding precision is high.
本发明公开了一种加氢反应器封头接管焊接工艺,工艺流程包括:焊接坡口干磁粉检测→预热→装配、点焊→外坡口埋弧自动焊→焊接外坡口→后热。预热温度≥200℃,焊接外坡口层间温度为200~250℃,后热温度为200~300℃,后热时间为2h,焊接电流为500~550A,焊接电压为28~30V,焊接速度为360~400mm/min。设备成本低,生产效率高,操作简单方便,焊接精度高。

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