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About product and suppliers:
        Alibaba.com offers 8,774 5s standard products. About 11% of these are valves, 1% are pipe fittings, and 1% are steel pipes. 

A wide variety of 5s standard options are available to you, such as 10#, 20#, and a53(a,b). You can also choose from structure pipe, oil pipe. As well as from api, astm, and bs. And whether 5s standard is ce, iso, or intertek eco-certification. 

There are 8,774 5s standard suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 5s standard respectively. 

s standard products are most popular in North America, Domestic Market, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 2,327 with ISO9001, 541 with Other, and 450 with ISO/TS16949 certification.