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.
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.
ASME/ANSI B16.9, MSS-SP-75, DIN 2615, EN 10253-2 , JIS B2311,GOST 17378or customer’s drawings
Schedule/ Wall Thinkness
sch5s,sch10s,sch10, sch20, sch30, std, sch40, sch60, xs, sch80, sch100, sch120, sch140, sch160, xxs, SGP or any other required thickness