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Reducing Tee, ASTM A420, A403, DN15-1800

10.11.2025

‌ASTM A420, A403 Reducing Tee‌ has a relatively simple structure, typically consisting of ‌three pipes‌—two with different diameters and a tee section connecting them. Based on different connection methods, reducing tees can be categorized into ‌welded, threaded, and flange types‌, each with specific advantages and disadvantages suited for different installation environments and requirements.

In terms of ‌working principle‌, the design of a reducing tee aims to ensure ‌smooth fluid transition‌. When fluid flows from a larger-diameter pipe into a smaller-diameter one, changes in ‌velocity‌ may affect ‌pressure and flow rate‌. The reducing tee achieves this through its ‌optimized geometry‌, minimizing excessive turbulence during flow direction changes, thereby ‌reducing energy loss‌ and improving overall system efficiency.

Specification

Type: Reducing Tee.

Materials:

Carbon Steel: ASTM A234 WPB, WPC, ASTM A420 WPL1, WPL3, WPL6 and WPHY-42/46/52/56/60/65/70.

Stainless Steel: ASTM A403 WP304/304L, WP316/316/L, WP321, WP347 and WPS31254.

Sizes: 1/2-72 Inch (DN15-DN1800).

Wall Thickness: SCH 5-SCH 160.

Standards: ANSI B16.9/B16.28 and MSS SP-43/SP-75.

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