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About product and suppliers:
        Alibaba.com offers 71,863 hollow pipe products. About 79% of these are steel pipes, 3% are stainless steel pipes, and 1% are plastic tubes. 

A wide variety of hollow pipe options are available to you, such as a53(a,b), 10#, and 16mn. You can also choose from astm, api, and gb. As well as from structure pipe, boiler pipe, and fluid pipe. And whether hollow pipe is ce, bsi, or ul. 

There are 71,687 hollow pipe suppliers, mainly located in Asia. The top supplying countries or regions are China, Vietnam, and Bahrain, which supply 99%, 1%, and 1% of hollow pipe respectively. 

Hollow pipe products are most popular in Southeast Asia, Mid East, and South America. 

You can ensure product safety by selecting from certified suppliers, including 29,851 with ISO9001, 12,336 with Other, and 8,625 with ISO14001 certification.