1. Subject content and scope of application

China's industry standard JB/T4723-92 specifies the basic parameters such as the nominal pressure, nominal diameter and calculated heat exchange area of ​​carbon steel and stainless acid-resistant steel non-removable spiral plate heat exchanger. This standard applies to non-removable spiral plate heat exchangers with a nominal pressure greater than 1.6 mpa, a nominal diameter not greater than 1600 mm, and a nominal heat transfer area not greater than 120 m2. However, with the advancement of technology, large-scale non-removable spiral plate heat exchangers have been widely used in the national economy, and detachable spiral plate heat exchangers have also been greatly developed, so the standard has exposed certain limitations. Therefore, this appendix only provides some useful references.

2, the symbol description

PN - nominal pressure, mpa

DN—nominal diameter, mm

FN—nominal heat exchange area, m2;

F - calculate the heat exchange area, m2;

b — channel spacing, mm;

δ — plate thickness, mm

H — board width, mm

V—Processing capacity at a flow rate of 1 m/h, m3/h

Lt—the length of the spiral channel, m;

F—the area of ​​the spiral channel, m2;

Dn—takes the nominal diameter, mm;

d — center tube diameter, mm

3, type

For the structural formula of the non-removable spiral plate heat exchanger, see Chapter 3. 1.3.1

4, basic parameters

4.1 nominal pressure

Nominal pressure refers to the maximum working pressure that the channel can withstand.

PN: 0.6, 1.0, 1.6 MPA

4.2 nominal diameter

Carbon steel: 500,600,700,800,900,1000,1200,1400,1600mm;

Stainless acid-resistant steel: 300,400,500,600,700,800,900,1000,1200,1400,1600.

4.3 nominal heat exchange area

Carbon steel: 6, 8, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100, 1200 m2;

Stainless acid-resistant steel: 1, 2, 4, 6, 8, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 m2.