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1. In 80's of last century, Shanghai Industrial Boiler Co.，Itd. developed the large scale full- automatic SZS series Oil or GasBoiler by adopting advanced VP boiler technology of US CE company, and incorporate combined with Japan and Korea's similar type boilers advanced technology,
2. In 1985, Shanghai lndustrial Boiler Co., Itd. cooperated with us COMSAl and manufactured products as per the technical drawing package, process and ASME standard. The boiler witha tri- pass smoke and rear smoke box wet back structure has a good performance of lower back pressure and high efficiency by using screw tube and light pipe.