| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| DL/T 821-2002 | English | 799 |
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Days<=4
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The code of radiographic examination of butt welded-joints of pressure steels pipes and tubes
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DL/T 821-2002
| Obsolete |
DL/T 821-2002
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