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About product and suppliers:
        Alibaba.com offers 8,925 sleeve flange products. About 5% of these are flanges. 

A wide variety of sleeve flange options are available to you, such as stainless steel, carbon steel, and alloy steel. You can also choose from flanged, round. As well as from din, asme, and ansi. And whether sleeve flange is standard, or nonstandard. 

There are 8,925 sleeve flange suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of sleeve flange respectively. 

Sleeve flange products are most popular in North America, Southeast Asia, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 3,833 with ISO/TS16949, 3,675 with ISO9001, and 1,861 with Other certification.