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原料药品的生产,今年我们提出了实行“管道化”的技术革命的口号。要实現“管道化”,鋼材的需要就显得很突出,可是钢管有很多更重要的地方需要它,我們必须讓路,寻找适当的代用品,这方面聚氯乙烯塑料管是一項很理想的钢管代用品。如果使用要求温度不高(50℃以下),它的酸硷耐蝕力还较钢管更胜一等。我們在聚氯乙烯管加工处理方面从具体实踐中摸索到一些点滴經驗,茲简單介紹于后,以供兄弟单位参考。本品可耐热約60℃左右,但在湾接、封口、开“T”等加工处理时需加热至140°—200℃左右,可先用重油如甘油)經直火加热,待温度升至140℃以上,將需加工的本品浸入甘油中約一二分钟使软,即可进行加工操作。一、连接法:本品相互連接,需事先车好一只金屬“退拔头”(其粗細应按需要而定),然后將要连接的管子的一端浸入甘油中一二分钟,取出塞入“退热拔头”使管口相应扩大。其次將另一管子的一端塗以过氯乙
In the production of raw materials and drugs, this year we put forward the slogan of implementing a “pipelined” technological revolution. To achieve “pipeline”, the need for steel is obvious. However, there are many more important places where steel pipes need it. We must give way and find suitable substitutes. The PVC plastic pipe is an ideal Steel tube substitutes. If the required temperature is not high (below 50°C), its acid corrosion resistance is even better than steel pipe. We have explored some in-depth experiences in the processing of polyvinyl chloride tubes from specific practices. We will briefly introduce them later for reference by our brothers. This product can heat about 60 °C, but in the bay, sealing, open “T” and other processing when heated to about 140 °C -200 °C, can first use heavy oil such as glycerol) by direct fire heating until the temperature rise Above 140°C, the product to be processed is immersed in glycerin for about one or two minutes to make it soft and ready for processing. First, the connection method: This product is connected to each other, need to be a good car in advance “retreat” (the thickness should be determined according to needs), then the end of the tube to be connected to immersed in glycerin for 12 minutes, remove the plug " The heat-removing heads enlarge the nozzle accordingly. Next, one end of the other tube is coated with perchloroethylene.