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About product and suppliers:
        Alibaba.com offers 9,653 first quality standard products. About 1% of these are valves, 1% are steel pipes, and 1% are pipe fittings. 

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

There are 9,657 first quality standard suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Pakistan, and France, which supply 92%, 4%, and 1% of first quality standard respectively. 

First quality standard products are most popular in Mid East, Africa, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 1,056 with ISO9001, 826 with Other, and 229 with ISO14001 certification.