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About product and suppliers:
        Alibaba.com offers 322 20x40 rectangular pipe products. About 73% of these are steel pipes, 1% are stainless steel pipes. 

A wide variety of 20x40 rectangular pipe options are available to you, such as 10#, 16mn, and 20#. You can also choose from api, astm, and gb. As well as from erw, hot rolled, and cold rolled. And whether 20x40 rectangular pipe is structure pipe, or fluid pipe. 

There are 238 20x40 rectangular pipe suppliers, mainly located in Asia. The top supplying country or region is China, which supply 100% of 20x40 rectangular pipe respectively. 

0x40 rectangular pipe products are most popular in Southeast Asia, Domestic Market, and South America. 

You can ensure product safety by selecting from certified suppliers, including 127 with ISO9001, 74 with OHSAS18001, and 74 with ISO14001 certification.