Product Name：NBT47023-2012
1.Scope
This standard specifies the structural type and series size of the A-type flat welded flange for steel pressure vessels.
This standard is applicable to steel pressure vessel A flat welding flange with nominal pressure of 0.25MPa~1.6MPa and working temperature higher than -20°C~300°C.
2. Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.
NB/T 47020 Pressure vessel flange classification and technical conditions
NB/T 47024 non-metallic soft gasket
NB/T 47027 Pressure Vessel Flange Fasteners
3. Structure type and size
The structural type and series size of the A-type flat welding flange of various sealing surfaces shall comply with the requirements of Figure 1~4 and Table 1. The quality of the flange and the lining ring are listed in Table
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