Not detachable spiral heat exchanger type and parameter 1. The theme and applicable range
China's industry standard JB/T4723-92 stipulated the carbon steel and stainless steel acid not detachable spiral heat exchanger type of nominal pressure, nominal diameter, calculation of heat transfer area, and other basic parameters. This standard is applicable to the big 1.6 mpa nominal pressure, nominal diameter is not more than 1600 mm, nominal heat transfer area is not more than 120 m2 not detachable spiral heat exchanger. But with the development of technology, the large-scale not detachable spiral heat exchanger has set up a file in the national economy in wide application, and at the same time detachable spiral heat exchanger also has the very big development, so that the standard is exposed to some limitations. So this appendix only provide some useful reference.
2. Symbols show
PN-nominal pressure, mpa
DN-nominal diameter, mm
FN-nominal heat area, m2;
F-calculation heat transfer area, m2;
B-channel spacing, mm;
δ-thickness, mm
H-board wide, mm
V-1 m/h velocity of productivity, and from m3 / h
Lt-spiral channel length, m;
F-spiral channels area, m2;
Dn-take over the nominal diameter, mm;
D-the center pipe diameter, mm
3. Type
Not detachable spiral heat exchanger were see chapter 3 1.3.1
4. The basic parameters
4.1 nominal pressure
Nominal pressure refers to the channel to the maximum can work under pressure.
PN: 0.6, 1.0, 1.6 MPA
4.2 nominal diameter
Carbon steel: 500600700800900100 0120 0140 0160 mm;
Stainless steel acid: 300400500600700800900100 0120 0140, 0160.
4.3 nominal heat transfer area
Carbon steel: 6,8,10,15,20,25,30,40,50,60,80,100,1200 m2;
Stainless steel acid: 1,2,4,6,8,10,15,20,25,30,40,50,60,80,100 m2.
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