detailed information
1、 ISA1932 standard nozzle

overview
The standard nozzle, also known as ISA1932 nozzle, has the characteristics of high temperature and high pressure resistance, impact resistance, long service life, large measurement range, and measurement accuracy. It is suitable for measuring fluid flow in high-temperature and high-pressure steam heating network pipelines of power plants with high flow velocity. The standard nozzle is designed and manufactured according to the national standard GB/T2624-93 and verified according to JJG640-94. No real flow calibration is required.
scope of application
1. Nominal diameter: 50mm ≤ DN ≤ 500mm
2. Nominal pressure: PN ≤ 32MPa
3. Aperture ratio: 0.30 ≤ β ≤ 0.8
4. Reynolds number range: When 0.30 ≤ β ≤ 0.44, 70000 ≤ ReD ≤ 10 7
When 0.44 ≤ β ≤ 0.8, 20000 ≤ ReD ≤ 10 7
5. Accuracy: Level 1
structural style
The standard nozzle consists of an inlet plane portion A perpendicular to the axis, an inlet contraction portion composed of arc-shaped curved surfaces B and C, a cylindrical throat E, and a protective groove F required to prevent edge damage. The pressure measurement method adopts an angle connection upstream and can be set according to the angle connection downstream, or at a further downstream location. Total length of nozzle:

The specific external structure is shown in the figure:

detailed information

overview
Long diameter nozzleMainly used in high voltage or high temperature and high pressure situations in the power industry, this typical design is adopted for main steam, main feedwater or desalinated water. It has the characteristics of wide range ratio, shock resistance, low pressure loss, long service life, large measurement range, and measurement accuracy. The long diameter nozzle is designed and manufactured according to the national standard GB/T2624-93 and verified according to JJG640-94. No real flow calibration is required.
scope of application
1. Nominal diameter: 50mm ≤ DN ≤ 630mm
2. Nominal pressure: PN ≤ 32MPa
3. Aperture ratio: 0.2 ≤ β ≤ 0.8
4. Reynolds number range: 10000 ≤ ReD ≤ 1 × 107
5. Accuracy: Level 0.5, Level 1
structural style
Long diameter nozzleIt consists of an inlet contraction part A, a cylindrical throat B, and a downstream end plane C, and its pressure measurement method adopts D-D/2 pressure measurement.
Long diameter nozzleThere are two forms: high ratio nozzle 0.25 ≤ β ≤ 0.8
Low ratio nozzle 0.25 ≤ β ≤ 0.5
When the β value is between 0.25 and 0.5, any type of long diameter nozzle structure can be used, as shown in the following figure