Reducing Coupling-CxC
| ASME B16.22 | EN1254-1 |
| S3/8×1/4 | S10x6 |
| S1/2×1/4 | S12x6 |
| S5/8×3/8 | S15x10 |
| S5/8×1/2 | S15x12 |
| S1 1/8×5/8 | S28x15 |
| S1 1/8×7/8 | S28x22 |
| S1 3/8×5/8 | S35x15 |
| S1 3/8×7/8 | S35x22 |
| S1 3/8×1 1/8 | S42x28 |
| S1 5/8×1 1/8 | S42x35 |
| S1 5/8×1 3/8 | S54x28 |
| S2 1/8×1 3/8 | S54x35 |
| S2 1/8×1 5/8 | S54x42 |
| S2 1/8×1 5/8 | S67x22 |
| S2 5/8×7/8 | S67x28 |
| S2 5/8×1 1/8 | S67x35 |
| S2 5/8×1 3/8 | S67x42 |
| S2 5/8×2 5/8 | S67x54 |
| S3 1/8×1 1/8 | S76x28 |
| S3 1/8×1 3/8 | S76x35 |
| S3 1/8×1 5/8 | S76x42 |
| S3 1/8×2 1/8 | S76x54 |
| S3 1/8×2 5/8 | S76x67 |
