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About product and suppliers:
        Alibaba.com offers 10,303,844 us standard products. About 11% of these are steel pipes, 6% are pipe fittings, and 2% are scaffoldings. 

A wide variety of us standard options are available to you, such as 10#, 20#, and a53(a,b). You can also choose from api, astm, and bs. As well as from structure pipe, fluid pipe, and oil pipe. And whether us standard is erw, hot rolled, or cold drawn. 

There are 10,302,288 us standard suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of us standard respectively. 

Us standard products are most popular in North America, Domestic Market, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 2,670,199 with ISO9001, 1,476,683 with Other, and 437,240 with ISO14001 certification.