锅炉、热交换器用管订货技术条件 第4部分:低温用低合金钢
Purchase technical specification for boiler & heat exchanger tubes-Part 4: Low alloy steel for low-temperature service
2021-01-07
NB/T 47019.2-2021
锅炉、热交换器用管订货技术条件 第2部分:规定室温性能的非合金钢和合金钢
Purchase technical specification for boiler & heat exchanger tubes-Part 2: Non-alloy and alloy steel with room temperature properties
2021-01-07
NB/T 47019.3-2021
锅炉、热交换器用管订货技术条件 第3部分:规定高温性能的非合金钢和合金钢
Purchase technical specification for boiler & heat exchanger tubes/pipes-Part 3: Non-alloy and alloy steel with specified elevated temperature properties