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About product and suppliers:
        Alibaba.com offers 1,245 long neck flange products. About 80% of these are flanges, 2% are flange. 

A wide variety of long neck flange options are available to you, such as stainless steel, carbon steel, and alloy steel. You can also choose from din, asme, and ansi. As well as from free samples, paid samples. 

There are 1,100 long neck flange suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and South Korea, which supply 90%, 8%, and 1% of long neck flange respectively. 

Long neck flange products are most popular in Domestic Market, Mid East, and North America. 

You can ensure product safety by selecting from certified suppliers, including 624 with ISO9001, 238 with Other, and 82 with ISO14001 certification.