No. 235307
T 7
- 国家或地区
巴西 - 标准体系NBR
对应标准
- ABNT NBR 10252:1988Seamless tubes for boilers, heat exchangers and superheaters
- ABNT NBR 5584:1982Seamless chromium-molybdenum and chromium-molybdenum-silicon alloy steel tubes for heat exchangers
- ABNT NBR 5582:1982Seamless chromium-molybdenum and chromium-molybdenum-silicon alloy steel tubes for refineries