The equivalent tee (or straight tee) is utilized as the branch has the same distance across as the run pipe. Equal Tee are equipped for taking care of any high or low weight stream of fluid through it.
There are different types of Tee used in piping:
Equal/Straight Tee– in this type of tee Diameter of Branch is same as the Diameter of the Run Pipe
In Reducing Tee – Diameter of the Branch size is smaller than the Diameter of the Run Pipe

Standard: ASME B16.9, ASME B16.25, ASTM A234, ASTM A420, JIS B2311, JIS B2312,JIS B2313
MSS SP-75, DIN2615

Size: Seamless: 1/2”-24” , Welded:24”-96”

Thickness: SCH10-XXS

Carbon Steel: ASTM A234 WPB, WPC
Low Temperature Steel: ASTM A420 WPL6, WPL3, WPL8, WPL9
Alloy Steel equal tee: ASTM A234 WP1, WP2, WP5 CL1, WP5 CL3, WP9 CL1, WP9 CL3, WP11 CL1, WP11 CL2, WP11 CL3, WP12 CL1, WP12 CL2, WP22 CL1, WP22 CL2, WP22 CL3, WPR, WP91, WP911
Stainless Steel equal tee: ASTM A403 WP304, WP304L, WP310S, WP316, WP316L, WP321, WP347, WP348, ….
Duplex Stainless Steel: ASTM A815 S31803, S32750, S32760, S32205
Pipeline Steel equal tee: ASTM A860 WPHY42, WPHY46, WPHY52, WPHY60, WPHY65, WPHY70