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LPG nozzle

LGP nozzle, also known as standard nozzle. Its design, manufacturing, and use comply with the provisions of international standards ISO5167 or GB/T2624. Due to its arc-shaped inlet and cylindrical shape with a certain length, it has good wear resistance and corrosion resistance, and is commonly used for measuring the flow rate of liquids and gases under high temperature and pressure.

Key words:

LPG nozzle

Classification:

Throttling device

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DESCRIPTION

Introduction to LGP Nozzle: Product Features & Technical Performance Parameters
The LGP nozzle, commonly referred to as the standard nozzle or ISA1932 nozzle, is a throttling device. It is typically combined with a differential pressure transmitter and a secondary meter to form a complete flow measurement system. Below is an introduction to its product features and technical performance parameters:
1. Product Features
- Simple Structure & Easy Installation: It features a relatively compact structure, facilitating installation and maintenance in pipeline systems.
- Low Pressure Loss: Compared with orifice plates, the LGP nozzle has smaller pressure loss, enabling effective energy conservation.
- No In-Situ Flow Calibration Required: Compliant with the national standard GB/T2624, it can meet the designed accuracy as long as it is designed and manufactured in accordance with the standard, without the need for in-situ flow calibration.
- Stable Performance: It exhibits resistance to high temperature, high pressure, impact, and corrosion, allowing stable operation in harsh industrial environments with a long service life.
- High Accuracy: It boasts high accuracy, excellent repeatability, and stable discharge coefficient, with an accuracy (uncertainty) of ±0.8% ～ ±1.2%.
- Wide Measurement Range: It can measure liquids, gases, steam, and various contaminated media, making it applicable to a broad range of scenarios.
2. Technical Performance Parameters
- Nominal Diameter: Generally DN50-DN500mm; some models can reach up to DN630mm.
- Operating Pressure: Usually ≤42MPa.
- Operating Temperature: -50℃ - 650℃.
- Pressure Tapping Methods: Two types are available:
  - Corner tapping (with independent annulus, integrated flange-annulus, or direct drilling);
  - Diametrical tapping (D-D/2).
- Material:
  - The nozzle body is generally made of stainless steel such as 304 or 316;
  - Flanges or clamping parts can be selected from carbon steel, alloy steel, or stainless steel based on the medium temperature;
  - For some special models, materials like 15CrMoG or 310S are also used.
- Accuracy: Compliant with standards, the accuracy is ±1.0% (for standard nozzles) and ±2.0% (for long-radius nozzles).