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About product and suppliers:
        Alibaba.com offers 188,541 square pipe products. About 51% of these are steel pipes, 8% are stainless steel pipes, and 1% are aluminum pipes. 

A wide variety of square pipe options are available to you, such as 10#, q195, and 16mn. You can also choose from astm, api, and din. As well as from ce, ul, and bsi. And whether square pipe is structure pipe, fluid pipe, or oil pipe. 

There are 188,480 square pipe suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Singapore, and India, which supply 99%, 1%, and 1% of square pipe respectively. 

Square pipe products are most popular in Southeast Asia, Mid East, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 74,240 with ISO9001, 26,631 with Other, and 10,081 with ISO14001 certification.
        
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