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About product and suppliers:
        Alibaba.com offers 47 neck bw flange products. About 72% of these are flanges, 27% are pipe fittings. 

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

There are 47 neck bw flange suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of neck bw flange respectively. 

Neck bw flange products are most popular in Mid East, Southeast Asia, and South America. 

You can ensure product safety by selecting from certified suppliers, including 26 with ISO9001, 21 with Other, and 7 with OHSAS18001 certification.