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Standard Insuued on: 2011-07 |
Category No.: | NB | Valid Status: | abolished |
Issued Organization: | National Energy Administration | Issued Date: | 2011-07-01 |
Implemented Date: | 2011-10-1 | Abolished Date: | 2021-07-01 |
Superseded Standard.: | NB/T 47019.5-2021 Purchase technical specification for boiler & heat exchanger tubes一Part 5: Stainless steel |
Superseded Date: | 2021-7-1 |
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