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Stainless Steel - ANSI Backing Ring - Class 150
The Stainless Steel Backing Rings are designed to slip over the small Adaptor Flange (small) pipe size up to 42mm, or the Stub Flange from pipe sizes 76.1 to 168.3 These flanges match series ANSI Class 150 For 304 grade Stainless Steel substitute 4 instead of 6 in code, eg SBA4.000xxx
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