| 对焊环（翻边管）尺寸 HG20599-97 A、B系列标准 Butt welding ring (Lap pipe) size HG20599-97 - A and B series of standards | |||||||||||||||
| 公称直径 Norminal diameter | D | PN0.6MPa(6bar) | PN1.0MPa(10bar) | PN1.6MPa(16bar) | PN2.5MPa(25bar) | ||||||||||
| DN | A系列 Series | B系列 Series | L | G | R | L | G | R | L | G | R | L | G | R | |
| 15 | 1/2 | 21.3 | 18 | 30 | 38 | 2 | 38 | 46 | 2 | 38 | 46 | 2 | 38 | 46 | 2 |
| 20 | 3/4 | 26.7 | 25 | 32 | 48 | 2 | 40 | 56 | 2 | 40 | 56 | 2 | 40 | 56 | 2 |
| 25 | 1 | 33.4 | 32 | 35 | 58 | 3 | 40 | 65 | 3 | 40 | 65 | 3 | 40 | 65 | 3 |
翻边.