双金属复合钢管：是将镀锌钢管或焊管、无缝钢管和壁厚更薄的不锈钢管强力嵌合在一起的新型复合给水管材，也是一种更理想的管道升级换代产品。它保留了两种不同材料内在的优点，互补了它们内在的不足，并且沿用了镀锌钢管传统成熟的安装方式和工艺，因此在使用中方便、可靠、卫生、安全。根据基管与内衬管选材的不同，以及制造工艺的提升，已有不少厂家生产的双金属复合管广泛应用于油田、化工、电力等工业领域，其适用范围越来越广泛，带来的经济、环境、社会效益也更加明显。
Bimetal composite steel pipe: it is a new type of compound water supply pipe, which is a new type of pipe material which is strongly chimed with galvanized steel pipe or welded pipe, seamless steel pipe and thinner stainless steel tube. It is also an ideal product for pipeline upgrading. It has retained the inherent advantages of two different materials, complemented their inherent deficiencies, and used the traditional mature installation and technology of galvanized steel tubes, so it is convenient, reliable, hygienic and safe in use. According to the different material selection of the base tube and inner liner and the upgrading of the manufacturing process, many manufacturers have been widely used in the fields of oil field, chemical industry and electric power industry. The application range is more and more extensive, and the economic, environmental and social benefits are more obvious.