AWWA 207 Stainless Carbon Steel Blind Blank Flange

Product Introduction

Size

NPS 4″-72″ DN100-DN1600

Pressure

CLASS B/CLASS D/ CLASS E /CLASS F

Material

Carbon Steel: A105; Q235B S235JR

Stainless Steel: SS304; SS316; SS321

Blind flange is a special type of flange that primarily serves to seal or close a flange connection in a pipeline system. This type of flange is commonly used for maintenance, repair, or temporary closure of pipelines in pipeline systems. The appearance of a blind flange is similar to a regular flange, but it does not have a middle hole to prevent fluid from passing through.

AWWA C207 standard blind flange

AWWA C207 is a standard developed by the American Water Works Association (AWWA) that specifies the design, manufacturing, size, and installation requirements for various flanges and accessories used in water supply and sewage engineering. The AWWA C207 standard also includes specifications for blind flanges.

Connection method: Blind flanges are usually connected using bolts and nuts, similar to other types of flange connections. The method and quantity of connections depend on the requirements specified in the standard.

Coating and protection: Standards usually specify the surface coating and protection requirements for blind flanges to ensure their good corrosion resistance during use.

Inspection and testing: The standard requires manufacturers to conduct necessary inspections and tests on blind flanges to ensure that they meet the specified quality standards and performance requirements.

Advantages

1. Diversity:

The AWWA C207 standard defines multiple types of blind flanges to meet different application requirements, including different pressure levels, sizes, and material choices.

2. Reliability:

Blind flanges that comply with the AWWA C207 standard have undergone strict testing and inspection according to the standard, ensuring that they have good quality and reliability and can work under various environmental conditions.

3. Applicable to water supply and sewage engineering:

The AWWA C207 standard is specifically designed for water supply and sewage engineering to ensure that blind flanges meet the specific requirements of these projects, including corrosion resistance and coating requirements.

4. Compliance with international standards:

The AWWA C207 standard, as an international standard, has a wide range of applicability, allowing blind flanges using this standard to be recognized globally.

Disadvantages

1. High cost:

Blind flanges that comply with AWWA C207 standards may incur higher manufacturing and procurement costs due to their quality standards and special design.

2. Relatively large weight:

Due to the high-pressure rating that blind flanges usually need to meet, their design may result in being heavier than regular flanges, which may become a problem in some weight sensitive applications.

3. Restricted use:

Blind flanges are mainly used to close the ports of pipeline systems, so their usage scenarios are relatively limited and not suitable for applications that require frequent opening and closing.

4. Installation and maintenance are relatively complex:

The installation and maintenance of blind flanges may be relatively complex, especially in larger sizes and high pressure levels, requiring more labor and equipment.

1.Shrink bag–> 2.Small Box–> 3.Carton–> 4.Strong Plywood Case

One of our storage

Loading

Packing & Shipment

1.Professional manufactory.
2.Trial orders are acceptable.
3.Flexible and convenient logistic service.
4.Competitive price.
5.100% testing,ensuring the mechanical properties
6.Professional testing.

1.We can guarantee the best material according to related quotation.
2.Testing is performed on each fitting before delivery.
3.All packages are adapt for shipment .
4. Material chemical composition is conformed with international standard and environment standard.

A) How can I get more details about your products?
You can send an email to our email address. We will provide catalogue and pictures of our products for your reference.We can also supply pipe fittings, bolt and nut, gaskets etc. We aim to be your piping system solution provider. 

B) How can I get some samples?   
If you need, we will offer you samples for free, but new customers are expected to pay express charge. 

C) Do you provide customized parts? 
Yes, you can give us drawings and we will manufacture accordingly. 

D) To which country have you supplied your products?
We have supplied to Thailand, China Taiwan, Vietnam, India, South Africa, Sudan, Peru , Brazil, Trinidad and Tobago, Kuwait, Qatar, Sri Lanka, Pakistan, Romania, France, Spain, Germany, Belgium, Ukraine etc. (Figures here only include our customers in latest 5 years.). 

E) I can’t see the goods or touch the goods, how can I deal with the risk involved?  
Our quality management system conforms to the requirement of ISO 9001:2015 verified by DNV. We are absolutely worth your trust. We can accept trial order to enhance mutual trust.