JIS B2311 concentric reducer Specifications 1.Size:1/2"-48",DN15-DN1200 2.Material:Carbon steel: ASTM/ASME A234 WPB-WPC, ST37.2. Alloy steel:ST52, ...

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astm a234 wpb concentric reducer 4 inch to 2.5 inch reducer fitting t.b.w reducer

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