High Quality Sight Glass Full Bore Use to Industrial Pipelines
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Product Highlights
- Versatile Material Options: Shell available in carbon steel or stainless steel for diverse industrial needs.
- Multiple Connection Types: Supports thread, flange, welding, and quick installation connection modes.
- High Pressure Resistance: Sealing material rated for 0.6-2.5MPa working pressure.
- Durable Lens Materials: Lens options include tempered borosilicate glass, plexiglass, and quartz glass.
- Standard Compliance: Manufactured in accordance with hgj501 ~ 502-86 pressure vessel mirror standards.
- Fast Lead Time: Peak and off-peak season lead time within 15 working days.
- Flexible Production: Production arranged according to specific user needs and requirements.
Product Attributes
- Customization
- Available
- Transport Package
- in Polywood Case
- Specification
- DN50, DN65, DN80, DN100, DN125
- Trademark
- BOHAI
- Origin
- China
- HS Code
- 8418999990
- Production Capacity
- 50000 PCS Per Year
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
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Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
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Product Description


Pipe mirror is a general term. All mirrors installed on pipes are called pipe mirror. It includes glass pipe sight glass, cross glass plate through mirror. The through mirror is divided into swing plate through mirror, floating ball through mirror, impeller through mirror and stainless steel through mirror. According to the connection mode, there are thread, flange, welding, quick installation, etc
The pipe mirror is suitable for chemical, petroleum and other industrial pipelines. It is used to observe and monitor the flow of medium in the pipeline, ensure the safety of the pipeline and the quality of products. It is an indispensable and important part of industrial pipelines
Installation of pipe sight glass:
1. Selection of installation location. The pipe mirror is installed at a certain point in the pipe. It is used to let the staff observe, so the selection of location is very important. The first is the location. If it is installed at a very partial position, every observation will take half a day, which may affect the enthusiasm and timeliness of the staff
2. Selection of height. The pipe mirror is used for observation, mainly manual observation (a few are replaced by installation of monitoring equipment). Therefore, the installation height of the pipe mirror is subject to the convenient observation of personnel. If it is too high, it is very inconvenient to use the climbing tool every time; if it is too low, it may be difficult to observe clearly
3. Sufficient light. Since it's observation, light is a crucial condition. It's impossible to see clearly in the dark position. Therefore, the pipe mirror must be installed in the pipe position with sufficient light, or specially equipped with lighting device
4. Installation of pipeline mirror lens. The installation of mirror lens shall ensure that the mirror base is flat and smooth, the gasket between the mirror and the mirror base is flat, the gasket is not damaged and does not stick grease. Before tightening the screws, make sure that the mirror base and cover are installed correctly, and then slowly tighten the screws diagonally
5. For flange or threaded pipe mirror device, make sure that the gasket is installed well before operation. Retighten the bolts if necessary. Ensure that the gasket between the pipe and the pipe mirror is installed correctly, the connecting flange is not damaged, and adjust the connecting screw. Not only to ensure that the accessories connected with the mirror lens are well sealed, but also to ensure that the seal between the mirror and the pipe is good. And ensure that the pressure in the pipe does not exceed the rated pressure
6. After installation, there should be no additional pressure on the pipe mirror, otherwise the mirror will be subjected to uneven force and the mirror glass will be broken.
The main purpose and parameters of the mirror: the mirror is to observe the reaction and flow of liquid medium in the pipeline, so as to ensure the normal production. Mirror production is in accordance with hgj501 ~ 502-86 pressure vessel mirror standard manufacturing, according to the needs of users to arrange production; product material: shell: carbon steel, stainless steel lens material: tempered borosilicate glass, plexiglass, quartz glass sealing material: 0.6-2.5mpa, working temperature: - 20-200 ºC; mainly: zzhb through mirror (including zzhb-y impeller type and zzhb-b pendulum plate type) and Zzhb-bl glass tube mirror
Glass mirrors can be installed vertically on pipes, such as the return line of equipment cooling circulating water
About the Supplier
Company Profile
Founded in 1980 and headquartered in Bei-Zha-Kou Electronic Industrial Park, Jinnan District, Tianjin, a place incorporated into the prosperous Bohai economic rim, Bohai Valve has been and will continue exploring and innovating. In 2014, Bohai Valve was promoted to a non-area-limited group company in China. The group company is committed to providing stable and reliable fluid control solutions aiming at engineering fields including hydropower, thermal power, steel making, metallurgy, petroleum, chemicals, sewage treatment and water systems.
The group company covers a land of more than 80, 000m2 for its valve manufacturing base and casting factory, and possesses all necessary production and testing means. It is a lare valve manufacturer engaged in valve development, manufacturing, and sales.
Major product lines are manufactured with reference to ANSI, API, DIN, BS, JPI, and JIS standards and China's GB standards by means of the latest technologies favored across the world. They include butterfly valves, gate valves, ball valves, globe valves, check valves, hydraulic control valves, cryogenic valves, throttle valves, metallurgical valves, oxygen tubing valves, and HPHT valves, which are available in more than 100 series and thousands of sizes, with pressure rating ranging from 1.0MPa to 10MPa and port size from DN50 to DN4000. These valves can be operated manually, electrically, pneumatically, hydraulically, and/or electro-hydraulically, and made of different materials, manufactured to different types and sizes, and therefore meet the need for one-stop purchasing.
To ensure the stability and reliability of its quality, the group company uses CNC machine tools, CNC multi-station machining center, extra large processing size (5 meters) vertical lathes and large drilling center for its major machining tasks, maintaining a world automation level throughout its production process. The group company also procures advanced detection equipment and type testing platform for nondestructive testing, spectrum analysis, CMM measuring, supersonic spraying, heat treatment, low leakage test, life test, low temperature performance test, and wear and high temperature resistance test, which not only enhances the machining and testing ability of the factory but also supports the development of new products for harsh industrial environment, thus ensuring the stability of product quality.
The company also has a large casting base and owns a B3R 125 electric furnace, 3-ton, 5-ton, and 10-ton cupola furnaces, a mobile resin molding line, an epoxy powder spraying line, and a testing center, providing strong and powerful hardware guarantee for the manufacturing of quality valves.
Bohai Valve has long used the advanced management concepts to their factory management and applied the resource management system and warehouse management system to all its products for quality management. It is also one of the first valve manufacturers in China that have passed the ISO 9001, ISO 14001 and OHSAS 18001 certifications. Over the past years, it has been awarded national TS permit and U. S. API certificates for both the company and its products. Bohai Valve now is a member of the supply network for State Grid Corporation's power plants, a member listed in the supply networks of China's other four biggest power companies, a company member of China Engineering Construction Industry Association, and the largest supplier of hydropower valves in China.
We maintain our devotion to innovation and keep learning to gain creative ideas and capabilities, transforming our status from a traditional manufacturer to a tech-based enterprise and developing world advanced valve products. For this purpose, the group company set up the Valve Technology Research Center and pooled together the nation's leading experts and engineers so as to provide the most professional solutions with respect to product development, design, manufacturing and testing.
About Our Factory & Business Background
- Address
- 88 Gaoying Road, Beizhakou Electronic Industrial Zone, Tianjin, China
- Terms of Payment
- LC, T/T, Western Union
- International Commercial Terms(Incoterms)
- FOB, CFR, CIF
- Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays - Nearest Port
- Tianjin, qingdao, shenzhen
Our Production Capability & Technical Expertise
Our Industry Experience & Global Business Record
- Export Year
- 2008-07-18
- Main Markets
- North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
FAQ
- What materials are used for the sight glass?
- The shell is made of carbon steel or stainless steel, while the lens can be tempered borosilicate glass, plexiglass, or quartz glass.
- What connection modes are supported?
- It supports thread, flange, welding, and quick installation connection modes.
- What is the maximum working pressure?
- The sealing material is rated for a working pressure of 0.6-2.5MPa.
- How long is the lead time for production?
- Both peak and off-peak season lead times are within 15 working days.
- Is the product customizable?
- Yes, production is arranged according to the specific needs of users.
- What standards does the product meet?
- It is manufactured in accordance with the hgj501 ~ 502-86 pressure vessel mirror standard.
- Where are the products shipped from?
- The nearest ports for export are Tianjin, Qingdao, and Shenzhen.
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