国外阀门材料常用技术标准 高温用铁素体球墨铸铁承压铸件、修补截面的最小半径
| 铁管塞堵尺寸,英寸 | 圆柱或圆锥的最小半径,英寸[mm] | 
| 1/8 | 9/16[15] | 
| 1/4 | 11/16[18] | 
| 3/8 | 11/16[28] | 
| 1/2 | 11/4[32] | 
| 3/4 | 2[52] | 
| 1 | 21/2[64] | 
| 11/4 | 4[104] | 
| 11/2 | 51/4[136] | 
| 2 | 81/8[208] | 
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