变径三通接头（CxCxC）
| ASME B16.22 | EN1254-1 |
| T7/8×7/8×5/8 | T22X22X15 |
| T1 1/8×1 1/8×7/8 | T28X28X22 |
| T1 3/8×1 3/8×7/8 | T35X35X22 |
| T1 3/8×1 3/8×1 1/8 | T35X35X28 |
| T1 5/8×1 5/8×1 1/8 | T42X42X28 |
| T1 5/8×1 5/8×1 3/8 | T42X42X35 |
| T2 1/8×2 1/8×7/8 | T54X54X22 |
| T2 1/8×2 1/8×1 1/8 | T54X54X28 |
| T2 1/8×2 1/8×1 3/8 | T54X54X35 |
| T2 1/8×2 1/8×1 5/8 | T54X54X42 |
| T2 5/8×2 5/8×1 3/8 | T67X67X35 |
| T2 5/8×2 5/8×1 5/8 | T67X67X42 |
| T2 5/8×2 5/8×2 1/8 | T67X67X54 |
| T3 1/8×3 1/8×1 5/8 | T76X76X42 |
| T3 1/8×3 1/8×2 1/8 | T76X76X54 |
| T3 1/8×3 1/8×2 5/8 | T76X76X67 |
| T4 1/8×4 1/8×3 1/8 | T108X108X76 |
| T5 1/8×5 1/8×4 1/8 | T133X133X108 |
| T6 1/8×6 1/8×3 1/8 | T159X159X108 |
| T6 1/8×6 1/8×5 1/8 | T159X159X133 |
