Bends, tees, reducers and flanges must match the main duct material, cross-section and connection system. When ordering fittings separately, include the main and branch duct specifications.
For bends, confirm the turn angle and available space. For tees, confirm main and branch dimensions and directions. For reducers, confirm both ends, length and offset. For flanges, check hole patterns, fastening and sealing details. Resolve uncertain dimensions against drawings.
Organizing fittings by installation area or system number makes quantities, packing and delivery checks easier. WANJINGDE can help clarify the supply scope from the project schedule. Non-standard items follow approved drawings.
