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About product and suppliers:
        Alibaba.com offers 10,705 carbon steel pipe grades products. About 1% of these are bolts. 

A wide variety of carbon steel pipe grades options are available to you, such as ce, ccc. You can also choose from medicine grade, food grade. As well as from free samples, paid samples. 

There are 10,827 carbon steel pipe grades suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Canada, which supply 98%, 1%, and 1% of carbon steel pipe grades respectively. 

Carbon steel pipe grades products are most popular in Mid East, Southeast Asia, and South America. 

You can ensure product safety by selecting from certified suppliers, including 3,356 with ISO9001, 1,753 with Other, and 579 with ISO14001 certification.