1、辦理特殊危險級别動火作業證，請工廠的急救、消防到位，現場協助，預防爲主。
1, for the special danger level hot work permit, please factory first aid, fire protection in place, on-siteassistance, prevention.
2、焊接方法：使用抱箍焊接，用槽鋼根據集氣管尺寸預制U型抱箍，抱箍圍繞漏點一周。槽鋼抱箍必須預制三個帶閥門的管，這三個管的作用是放洩漏的氨水、洩壓及充蒸汽的安全保護。
2, welding method: using hoop welding, steel according to the collecting pipe size prefabricated U hoop, hoop aroundthe leak of a week. Steel hoop must be prefabricated three with valve tube, the three tube is placed, leakage ofammonia leakage safety protection and filling steam pressure.
3、在動火全過程中，專人看護集氣管道上的氧含量監測儀，集氣管中的氧含量必須低於1%，保證管内混合氣體在爆炸極限之外，假如氧含量超過1%，嚴禁動火，必須查明氧氣超标的原因，找到漏點，阻止空氣進進。
3, in the whole process of hot, special care oxygen content monitor gas gathering pipeline, the oxygen content inthe gas collecting pipe must be less than 1%, ensure that the tube mixed gas in the explosion limit, if the oxygencontent is more than 1%, it is strictly prohibited to use fire, must find out why the oxygen exceed the standard,find the leak point, to prevent the air from entering.
4、確定施工方案前，由設備點檢用測厚儀檢測管道壁的厚度，確保焊接時不會焊穿管壁。假如管壁已經腐蝕變薄，焊接時可能穿透，那麽不能直接作業，隻能使用其他方法。
4, determine the construction schemes, by equipment inspection with thickness detection of pipeline wall thicknessto ensure the welding without welding wear tube wall. If the pipe wall has corrosion thinning, can penetrate whenwelding, so can not directly operation, can only use the other method.
5、作業職員要求。一定是有豐富經驗的焊工，在焊接作業時，盡量的在管壁這邊淺一點，確保不焊穿，否則，就會發生正壓著火的事故。另外
，臨時的檢驗平台一定要寬大，有撤離通道，便於萬一有事情時的及時撤離。
5, operations staff requirement. Must be experienced welders, during the welding process, as far as possible in thetube wall side a little light, to ensure that no welding, otherwise, there will be a positive pressure fireaccident. In addition, the temporary inspection platform must be wide, with evacuation routes, convenient in casethings timely evacuation.
6、保持正壓，正壓是非常關鍵的一步，由於淨化吸氣機不停的抽氣，集氣管道的壓力都相當的低，甚至可以達到負壓狀态。
6, to maintain positive pressure, positive pressure is a very critical step, because the gas extraction andpurification of suction machine does not stop, gas collecting pipe pressure is quite low, even can reach the stateof negative pressure.
7、確定漏點位置。由於集氣管道内上有荒煤氣、下有氨水，是氣
、液共存的設備，就必須確定漏點是在液面上，還是在液面下。
7, determine the leak location. Because the ammonia raw gas, gas collecting pipe, gas, liquid coexistence equipment,must determine the leak is in the surface, or in liquid.
8、蒸汽防護。在固定抱箍前，開好蒸汽備用，把抱箍按在集氣管上，蒸汽管接在一真個洩壓管上，開大蒸汽，在遠洩漏點點焊，固定槽鋼抱箍。
8, steam protection. In a fixed hoop ago, open good steam standby, the hoop on the collecting pipe, steam pipe isconnected in a really a pressure relief pipe, open the steam, in the far leak spot welding, fixed channel steelhoop.
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