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The interior and exterior surface of elbows are free from defect with a smooth welded seam,and are thoroughly and evenly coated with zinc using hot dip galvanizing process, so that metal-to-metal contact and galvanic protection against corrosion are provided, and surface of elbows with a clear post-galvanizing coating to provide further protection against corrosion.
Elbows are produced in normal trade sizes from ½“ to 6”, the degree including 90 deg, 60 deg ,45 deg, 30 deg,22.5deg,15deg or according to customer’s request .
Elbows are threaded on both ends,a thread protector with industry color-coded by sizes from 3” to 6” applied.