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、修补区域的最小厚度
| 铁管塞堵尺寸,英寸 | 最小修补厚度,英寸[mm] | 
| 1/8 | 11/32[8] | 
| 1/4 | 7/16[10] | 
| 3/8 | 1/2[13] | 
| 1/2 | 21/32[17] | 
| 3/4 | 3/4[19] | 
| 1 | 13/16[21] | 
| 11/4 | 7/8[23] | 
| 11/2 | 15/16[24] | 
| 2 | 1[26] | 
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