Awwa Blind Flanges Table 1,2,3

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Shanxi Hongkai Forging Co., Ltd. is located in China Energy Heavy Chemical Industry Base. Dingxiang County, the hometown of forging in Shanxi Province. Mainly produce flanges and forgings of various specifications. Application in piping installation, pressure vessel, equipment accessories.

Why Choose Us

Our Service
With strong technical force, advanced production technology, perfect quality inspection, and reliable after-sales service, it provides a basis for supervision and cooperation for many customers at home and abroad.

Our Certificate
The company Excellent Supplier of 2019 Safety production standardization certificate Quality management system certification.

Production Market
The products are mainly exported. It is exported to Europe, America and other countries and regions. The product quality is good, and the service is attentive. It is deeply appreciated and trusted by customers and users at home and abroad, and has won a high reputation. They have become one of the largest flange and forging suppliers in China.

Our Factory
Shanxi Hongkai Forging Co., Ltd. is located in China Energy Heavy Chemical Industry Base. Dingxiang County, the hometown of forging in Shanxi Province. Convenient transportation, abundant coal and power resources, fast communication and superior environment.

Advantages of Awwa Blind Flanges Table 1,2,3

Cost-efficiency:

Their simple designs make them easy to manufacture, and their easy installation saves time.

Versatility:

Compatible with many different types of flanges, they can be deployed in a wide range of piping systems.

Durability:

They are durable and long-lasting due to their robust materials and lack of moving parts.

Safety:

These help keep workers safe by preventing leaks during maintenance or repair work.

Types of Awwa Blind Flanges Table 1,2,3

Standard Blind Flanges

Standard blind flanges are the most commonly used type. They are simple, flat, and solid discs designed to block off a section of pipe or valve.

Raised Face Blind Flanges

Raised face blind flanges have a small raised section around the bore, which helps in creating a better seal with the gasket.

RTJ (Ring Type Joint) Blind Flanges

RTJ blind flanges feature a groove cut into their face, which accommodates a metal ring gasket, providing a high integrity seal.

Technical Specifications

Technical Parameter	Specifications
Size Range	1/2″ to 60″ (15mm to 1500mm)
Pressure Class	ANSI Class 150 to Class 2500
Temperature Range	-196°C to 650°C
Material Options	Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel
Standards	ASME/ASNI B16.5, ASME/ASNI B16.47, EN 1092-1, BS 4504
Surface Finish	125-200 AARH32-125 AARH
Bolt Hole Pattern	ASME B16.5 standardized
Testing Methods	Hydrostatic TestingRadiographic TestingUltrasonic TestingPMI Testing
Hardness	Max 200 HB

Application of Awwa Blind Flanges Table 1,2,3

Oil and Gas
Blind flanges are essential in both upstream and downstream operations. They allow sections of offshore pipelines or refinery units to be isolated, making inspections or modifications possible without shutting down the entire network.

Petrochemical and Chemical Processing
Chemical plants often deal with aggressive substances under extreme pressure. Blind flanges provide a safe and reliable way to seal off lines temporarily for cleaning, maintenance, or process adjustments.

Water and Wastewater Treatment
Municipal and industrial water treatment plants rely on blind flanges to stop flow in pipelines during equipment replacement or repair. Their reusability makes them especially cost-effective in these applications.

Power Generation
From boilers to cooling systems, power plants make frequent use of blind flanges to close off unused connections. This ensures safety during shutdowns and helps maintain system efficiency.

Shipbuilding and Marine Engineering
Ships have complex fuel, ballast, and cooling systems. Blind flanges serve as dependable closures that can withstand seawater exposure and the vibration of marine operations.

FAQ

Q: What is the difference between AWWA and ANSI flanges?

A: The AWWA standards provide flange properties intended for potable water use only, while the ANSI standards are designed for industrial flange applications. The AWWA flange ratings are only applicable at atmospheric temperatures. The ANSI ratings cover flange installations from -20* F to 1500* F.

Q: What is the difference between blind flanges and dummy flanges?

A: Difference Between Blind Flanges and Blank Flanges
Blind flanges are used when a pipe needs to be sealed off permanently, and no fluid or gas needs to pass through the pipe. Blank flanges are used when a pipe needs to be sealed off, but there is still fluid or gas passing through the pipe.

Q: How many types of blind flange are there?

A: Blind flanges are available in various types, including slip-on flanges, threaded flanges, weld neck flanges, and socket weld flanges. These types allow for flexibility in choosing the best blind flange depending on the specific requirements of the pipeline system, such as pipe size, pressure, or installation method.

Q: Do blind flanges need gaskets?

A: Blind flanges are bolted to the piping system, and gaskets are often used to ensure a tight seal and prevent leaks.

Q: How to measure blind flange size?

A: Use your caliper to measure from the raised face to the back of the flange. If the blind flange has a raised face, measure both the overall thickness and the height of the raised face separately. These measurements help ensure proper bolt length selection and gasket compression.

We're well-known as one of the leading awwa blind flanges table 1,2,3 manufacturers and suppliers in China. If you're going to wholesale high quality awwa blind flanges table 1,2,3 with competitive price, welcome to get more information from our factory. Also, customized service is available.

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