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SFLA flanges are made of angle steel, and the side of the surface is hot-dip galvanized or painted. The length of the flange depends on the connected duct or fittings.
SFLC for the courier plug-in flange (TDC), SFLD for the common plate flange (TDF) two flange thickness is usually consistent with the connected duct or key.
The standard side length of the angle: a-b-25,30,40,50
Standard thickness: t-3, 4, 5, 6
Special sizes are available upon request
For flange matching.