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About product and suppliers:
        Alibaba.com offers 2,522 economy standard products. About 1% of these are valves, 1% are pipe fittings, and 1% are steel pipes. 

A wide variety of economy standard options are available to you, such as 16mn, 20#, and a53(a,b). You can also choose from astm, gb, and bs. As well as from free samples, paid samples. 

There are 2,522 economy standard suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of economy standard respectively. 

Economy standard products are most popular in North America, Eastern Europe, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 532 with ISO9001, 180 with Other, and 121 with ISO14001 certification.