This national standard specifies design, manufacture, test, mark, packing, transportation requirements for deaerator.
This standard is applicable to thermal deaeration in thermal power station and nuclear power station whose unit capacity is no greater than 1000 MW and rated operating pressure is not less than 0.1MPa. As for the requirements for atmospheric thermal deaerator of condensed steam turbo set less than 25 MW and secondary loop deaerator of P WR nuclear power station, this specification can be conformed to. Requirements for other deaerator may also refer to this specification.
Foreword
1 Scope
2 The normative references
3 Terminology and Definition
4 Structure and external of deaerator
4. 1 Horizontal deaerator
4.2 Vertical type deaerator with double head plate
4. 3 Vertical type atomizing deaerator
4. 4 Spray type deaerator
5 Main performance indexes
6 Design requirements for deaerator
7 Materials
8 Manufacture and test of the deaerator
8.1 Cold and heat processing and forming
8.2 Welding
8.3 Heat treatment
8.4 Product test piece for welding
8.5 Nondestructive examination
8.6 Water pressure test
8.7 Testing methods
9 Symbols, oil paint, packing and transportation
9.1 Nameplate
9.2 Technological document when leaving factory
9.3 Oil paint
9.4 Packing and transportation
9.5 Signs
Figure 1 Horizontal deaerator
Figure 2 Vertical type deaerator with double head plate
Figure 3 Vertical type atomizing deaerator
Figure 4 Spray type deaerator
Figure 5 Header of the plate
Figure 6 Clack piece and tip circle
Figure 7 Case or dome header
Figure 8 Deviation measurements of ellipsoidal head
Figure 9 Main dimension deviations of ellipsoidal head
Figure 10 Inspection of the welding seams of the deaerator shell
Figure 11 The align deviation value of monolayer steel plate
Figure 12 The align deviation value of clad steel plate
Figure 13 Dimension of thinning out single side or both sides
Figure 14 Inspection for internal or external template
Figure 15 Inspection for angularity angle E on the girth welding joint
Figure 16 Inspection for the differences of the maximum and minimum inner diameter of the same cross section
Figure 17 Layout of the bolt hole of the flange
Figure 18 Remaining-height of welding seam of joints of Category A and B
Table 1 Indicator of dissolved oxygen in water outlet of deaerator of boiler used for electric power generation
Table 2 Indicator of dissolved oxygen in water outlet of deaerator for industrial boiler
Table 3 technical reduction volume of cylindrical shell
Table 4 Head pressing technical reduction volume
Table 5 Specification for materials of pressure parts of the deaerator
Table 6 Main dimension deviation of case or dome head
Table 7 Main dimension deviation of ellipsoidal head
Table 8 Number of longitudinal welding joints on the enclosure
Table 9 Align Deviation Value of the Monolayer Steel Plate
Table 10 Allowable error of outer circumference of the water tank subsection
Table 11 Remaining-height of welding seam of joints of Category A and B
