It is a production and international trade integration enterprise which has the People's Republic of China special equipment (pressure vessel) manufacturing license and the radiation safety license, and professional design and manufacture complete sets of equipment.
屋面瓦的发展经历了一个更替，从陶土瓦到水泥瓦，到现在的金属屋面瓦。这个更替反映了时代在进步，行业在进步，人们的品味在进步。
另外，这样的更替也是这个行业反复博弈的结果，一开始的陶土瓦不管是外形上还是质量上都很是差强人意。进而一部分追求品质和设计的人换成了水泥瓦，但是水泥瓦本身的脆、易断的特点使他在这个行业里渐渐的没落下去。进而金属瓦在这个行业崛起，因为他使用寿命长，所以博得了不少的好评。
金属屋面瓦容易切割，配件少，施工起来特别简单省时。金属屋面瓦只要见过效果的人无不称奇，而金属屋面瓦拥有先进的技术，质量值得信赖！
Company comprise: Zhejiang Longyuan Sifang Machinery Manufacture Co., Ltd., Longyuan Sifang Fish Meal Manufacture Co., Ltd., Sifang Shilei Stone Co., Ltd., Hangzhou Longyuan Sifang Metal Roofing Co., Ltd.. Company has passed ISO9000, SGS certificate, CE certificate and obtained the relevant professional qualification certificate, and has got the international trade import and export rights.
彩石金属瓦主要以镀铝锌钢板为基板，采用此类钢板为基材，可以保证整个屋面的承重能力，每片瓦片重量相当于同等铺设面积的传统瓦片的1/6捉着1/7，大大提高了建筑屋面的安全系数。彩石金属瓦施工过程中，采用水平打钉的方式进行固定，有效避免雨水侵入，解决了屋面漏水问题，降低屋面防水成本。
Company comprise: Zhejiang Longyuan Sifang Machinery Manufacture Co., Ltd., Longyuan Sifang Fish Meal Manufacture Co., Ltd., Sifang Shilei Stone Co., Ltd., Hangzhou Longyuan Sifang Metal Roofing Co., Ltd.. Company has passed ISO9000, SGS certificate, CE certificate and obtained the relevant professional qualification certificate, and has got the international trade import and export rights.
