The reducing cross also is called unequal pipe cross , it is the pipe cross which the four branch ends are not in the same diameters.  just like a unequal tee, the reducing cross connect the pipes of different diameters.  

Reducing-cross-Unequal-pipe-cross

Since the pipe cross has four ends, when describe a reducing cross people should indicate all the four ends diameters and their positions, or else it may bring som misunderstanding.   

Standard: ASME/ANSI B16.9, MSS-SP-75, DIN , EN 10253-2 , JIS B2311, GOST .

Material: ASTM A234, ASTM 403,ASTM A860, DIN 17175, EN10228 …Carbon steel, stainless steel , alloy steel.

Size: 3″-72″. DN80-DN1800

Connect method: Butt welding.

Type:  Welded : DN80-DN1800