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About product and suppliers:
        Alibaba.com offers 172,863 ring standard products. About 1% of these are other rubber products, 1% are valves, and 1% are pipe fittings. 

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

There are 172,863 ring standard suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of ring standard respectively. 

Ring standard products are most popular in North America, Western Europe, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 37,104 with ISO9001, 28,240 with Other, and 5,269 with ISO/TS16949 certification.