Product Catalog
Pipeline sight glass
Pipeline Sight Glass is an observation accessory mounted on industrial pipelines, used for real-time monitoring of flow condition, color, liquid level, impurities and reaction status of medium (liquid, gas, steam, solid-liquid mixture) inside pipelines. It is widely adopted in petroleum, chemical, pharmaceutical, food, environmental protection and other industries.
- Parameters
- Drawing
- Application areas
Main Types
Straight Through Sight Glass：Straight structure with flanges at both ends, enabling 360° full viewing angle, simple construction.
Tubular Sight Glass：Cylinder made of transparent glass tube with full viewing range, commonly used for low-pressure service.
Impeller / Float Sight Glass：Equipped with internal impeller or float to visually indicate fluid flow existence and flow rate.
Wafer / Single-Press Sight Glass：Compact structure, suitable for medium and low-pressure pipelines.
Product Standards
Applicable Standards：NB/T 47017, HG/T 21619 and other relevant specifications.
Flange Standards：GB, HG, ANSI, DIN, GOST
Pressure Rating：Complies with GB/T 20801.1 Pressure Piping Standard; ASME U-stamp certification is available.
Product Specifications
Welding Requirements：Welding construction shall follow GB 50236-2011 Code for Construction Quality Acceptance of Field Equipment & Industrial Piping Welding Engineering.
Weld joints feature smooth transition and must pass Class II radiographic non-destructive testing (NDT).
Shell Requirements：Smooth inner wall free of burrs; complete degreasing and oil removal treatment for the entire unit.
Parameter
| Parameter Item | Value / Description |
|---|---|
| Nominal Diameter (DN) | Threaded type: DN6 ~ DN100; Welded type: DN15 ~ DN300 |
| Glass Pressure Resistance | Tempered borosilicate glass plate: ≤2.5 MPa; Quartz glass plate: ≤10.0 MPa |
| Design Temperature | Tempered glass: 0 ~ 120℃; High borosilicate glass: ≤200℃; Quartz glass: ≤1000℃ |
| Shell Material | Carbon steel, 304 / 316L stainless steel, fluorine-lined steel (for strong corrosive media) |
| Sealing Materials | Nitrile rubber (for oil service); PTFE (acid & alkali resistant, high temperature resistant); Silicone rubber (food-grade, high temperature resistant) |
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