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About product and suppliers:
        Alibaba.com offers 36,670 d i pipe products. About 24% of these are steel pipes, 10% are pipe fittings, and 8% are plastic tubes. 

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

There are 36,209 d i pipe suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 98%, 1%, and 1% of d i pipe respectively. 

D i pipe products are most popular in South America, Southeast Asia, and North America. 

You can ensure product safety by selecting from certified suppliers, including 14,601 with ISO9001, 3,695 with Other, and 1,623 with ISO14001 certification.