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About product and suppliers:
        Alibaba.com offers 10,475 double wall tube products. About 8% of these are steel pipes, 2% are packaging tubes, and 1% are stainless steel pipes. 

A wide variety of double wall tube options are available to you, such as ce / eu, sgs, and bsi. You can also choose from 16mn, st37-2, and 10#. As well as from astm, api, and gb. And whether double wall tube is gas pipe, structure pipe, or boiler pipe. 

There are 10,591 double wall tube suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Turkey, and Taiwan, which supply 98%, 1%, and 1% of double wall tube respectively. 

Double wall tube products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 2,565 with ISO9001, 1,950 with Other, and 390 with ISO/TS16949 certification.