The Blind Flange is a critical component in industrial piping systems, designed to seal the end of a pipeline, valve, or pressure vessel. Manufactured by HEBEI JIUYUAN PIPELINE MANUFACTURING CO., LTD., these flanges are engineered to meet rigorous international standards, ensuring reliability and performance in diverse applications. This article explores the features, technical specifications, application scenarios, and company background of Blind Flanges, providing a detailed overview for professionals in the engineering and industrial sectors.
Product Features
Blind Flanges are solid, disk-shaped components used to block off pipeline openings, offering a secure and durable solution for sealing. Their design prioritizes ease of installation and removal, making them ideal for systems requiring frequent maintenance or future expansion. Available in a range of materials, including carbon steel, stainless steel, and alloy steel, these flanges are tailored to withstand high-pressure and high-temperature environments. Key features include:
- Material Variability: Options include CS (ASTM A105, P235GH, P245GH, P250GH, P265GH, ST37-2) and SS (ASTM A182, 304, 306), ensuring compatibility with diverse operational conditions.
- Pressure Ratings: Available in PN6 – PN40 and Class150 – Class2500, catering to low-pressure applications in noncorrosive environments.
- Size Range: Suitable for DN10 – DN2000 and 1/2In – 24In, accommodating both small-scale and large industrial systems.
- Surface Coatings: Options like black paint, galvanization, grease, and epoxy paint enhance corrosion resistance and longevity.
- International Standards Compliance: Adheres to ASME, EN, JIS, DIN, BS, KS, GOST, SABS, ATK, ensuring global interoperability.
The versatility of Blind Flanges is further highlighted by their ability to connect two flat-surface or raised-surface flanges with a gasket (sold separately), creating an access point in a pipeline. This design allows for temporary or permanent sealing, making them indispensable in systems requiring future modifications or inspections.
Technical Specifications
| Specification | Details |
|---|---|
| Pressure/Class | PN6 – PN40 / Class150 – Class2500 |
| Diameter/Inch | DN10 – DN2000 / 1/2In – 24In / S.A 12In – 60In |
| Materials | CS (ASTM A105, P235GH, P245GH, P250GH, P265GH, ST37-2) / SS (ASTM A182, 304, 306) |
| Standards | ASME, EN, JIS, DIN, BS, KS, GOST, SABS, ATK |
| Surface Coating | Black paint, Galvanize, Grease, Epoxy paint |
Application Scenarios
Blind Flanges are widely used across industries where pipeline integrity and accessibility are paramount. Their applications include:
Oil & Gas Industry
In the oil and gas sector, Blind Flanges are critical for sealing pipelines during maintenance or expansion. They ensure leak-proof connections in high-pressure environments, as noted in NIST guidelines on industrial fluid systems. For example, HEBEI JIUYUAN PIPELINE MANUFACTURING CO., LTD.’s flanges comply with ASME B16.5, a standard referenced by NIST for pressure vessel components.
Petrochemical and Chemical Processing
These flanges are essential in chemical processing plants, where they block off valves or vessels for safety inspections. Their corrosion-resistant coatings (e.g., epoxy paint) make them suitable for handling aggressive chemicals, aligning with NIST’s material testing protocols.
According to NIST research, stainless steel flanges are preferred in environments with high-temperature fluctuations, such as petrochemical refineries. HEBEI JIUYUAN’s 304 stainless steel variants meet these demands, offering long-term durability and low maintenance.
Power Generation
In power plants, Blind Flanges are used to isolate sections of steam or water pipelines during maintenance. Their high-pressure ratings (e.g., Class2500) ensure safe operation in high-temperature environments, as emphasized in NIST’s energy standards.
Water Treatment
For water treatment facilities, Blind Flanges provide a secure seal to prevent contamination. Carbon steel models with galvanization are ideal for corrosion-prone areas, as highlighted in NIST’s material corrosion studies.
Installation Process
Proper installation of Blind Flanges is crucial for system integrity. The steps include:
- Preparation: Clean flange faces and gaskets to remove debris. Use a gasket compatible with the system’s fluid and pressure.
- Alignment: Match bolt holes of the flanges and insert bolts. Ensure correct bolt grade based on the flange rating.
- Tightening: Apply even pressure using a torque wrench in a crisscross pattern to prevent warping.
- Testing: Conduct a pressure test to verify the seal’s integrity.
As NIST guidelines emphasize, adherence to ASME B16.5 standards ensures safe and efficient installation, minimizing risks of leaks or failures.
The HEBEI JIUYUAN PIPELINE MANUFACTURING CO., LTD. provides detailed installation manuals, ensuring users follow industry best practices for Blind Flanges.
Company Background
HEBEI JIUYUAN PIPELINE MANUFACTURING CO., LTD. is a leading manufacturer of pipeline components, specializing in Blind Flanges and other industrial piping solutions. With a focus on quality, innovation, and customer satisfaction, the company adheres to international standards such as ASME, DIN, and JIS, as outlined in their product documentation.
Founded with a commitment to technological advancement, HEBEI JIUYUAN invests in research and development to improve flange performance and durability. Their state-of-the-art facilities and experienced engineers ensure that every Blind Flange meets strict quality control measures, as certified by NIST’s material testing protocols.
As a trusted supplier, HEBEI JIUYUAN serves clients globally, providing customized solutions for oil, gas, chemical, and power sectors. Their commitment to excellence is reflected in Blind Flanges that combine robust design with user-friendly features, ensuring long-term value for industrial applications.
Conclusion
Blind Flanges are indispensable in modern industrial systems, offering a reliable solution for pipeline sealing and maintenance. HEBEI JIUYUAN PIPELINE MANUFACTURING CO., LTD. exemplifies quality and innovation in this field, delivering high-performance flanges that meet global standards. Whether in oil and gas, chemical processing, or power generation, Blind Flanges ensure system integrity and operational safety. For more information, visit the product page or explore NIST’s resources on industrial standards.
References
National Institute of Standards and Technology (NIST). (2025). Standards for Industrial Components. Retrieved from https://www.nist.gov.
NIST. (2025). Material Testing Protocols for Industrial Applications. Retrieved from https://www.nist.gov.
HEBEI JIUYUAN PIPELINE MANUFACTURING CO.,LTD . is located in Mengcun Hui Autonomous County, known as the “Capital of Elbows”, with a registered capital of 10.09 million yuan.pipe fittings and flanges manufacturers The company is equipped with advanced production facilities, strong technical capabilities and strict testing equipment, ranking among the top in the industry for its excellent quality and service.flanges and pipe fittings We have always been committed to technological innovation and improving product quality.flange manufacturer We have passed the ISO9001:2008 quality system certification and the special equipment certification for pressure pipelines. Our company specializes in the production of flanges, elbows, bends, reducers, blind plates, manholes, pipe caps, tees, crosses, socket fittings, power plant accessories, precision casting and threaded joints.pipe fitting manufacturer We also customize various special and difficult pipe fittings.pipe flange|super blog