Flanges for Pressure Vessel

Chuxin Flange: Your Professional Flanges for Pressure Vessel Manufacturer!

Chuxin Flange Fitting Co., Ltd., formerly known as Yongxing Jinggong Pipe Fitting Factory, founded in 1994, is a non-regional high-tech enterprise specializing in the design, development, production, sales and after-sales of flanges for pressure vessel. Our products sell well nationwide and far to overseas nations and regions.

Why Choose Us

Quality Control

In order to offer premium-quality products, Chuxin provides advanced inspection devices and complete inspection measures, builds a strict QC team to realize the quality control during the whole process from raw materials inspection, process detection to finished products and application.

Advanced Equipment

Our company has processing equipment and advanced testing instruments including hundreds of high-precision CNC lathes and desktop spectrometers, portable spectrometers, universal testing machines, impact testing machines, ultrasonic flaw detectors, metallographic detectors, Rockwell hardness testers, low-temperature cryogenic treatment tanks, etc.

Technology Certification

Our products are produced and inspected strictly in accordance with GB, AISI, ASTM, API, JIS, BS so as to control and safeguard the quality of products. We successively obtained ISO9001-2008 quality control system and CE (2014/68/EU) certification and API certification.

Professional after-sales service

Ensure the normal operation of the entire process from manufacturing to sales, the professional technical team is efficient and the after-sales service can meet the higher requirements of the third customers.

Types of Flanges for Pressure Vessel

NBT47021-2012
Type A flat welding flange is directly welded to the container without groove welding and the weld seam is small. The strength can refer to the loose flange.

NBT47023-2012
This standard is applicable to steel pressure vessel A flat welding flange with nominal pressure of 0.25MPa~1.6MPa and working temperature higher than -20°C~300°C.

Flanges for Pressure Vessel Specification

Size	1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Pressure Rate	300 LBS, 150 LBS, 1500 LBS, 2500 LBS, 600 LBS, 900 LBS
Facing Types	Ring Type Joint (RTJ), Raised Face (RF), Flat Face (FF), Large Tongue & Groove, Small Tongue, Lap-Joint Face (LJF), Large Male-Female (LMF), Small Male-Female (SMF), Groove
Equipments	Sand-Blasting Machine, Press Machine, Electric Bevelling Machine, Bending Machine, Pushing Machine, etc.
Production Technique	Machined, Forged, Heat Treated
Value Added Services	Zinc Blindd, Antirust Paint, Oil Black Paint, Yellow Transparent, Cold and Hot Dip Galvanized
Dimensions	ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings

Materials of Flanges for Pressure Vessel

Carbon Steel

Durable and cost-effective, carbon steel is great for high-pressure applications but lacks corrosion resistance.

Stainless Steel

With strong corrosion resistance, stainless steel is perfect for vessels exposed to harsh conditions like chemicals or moisture.

Alloy Steel

Designed for extreme conditions, alloy steel offers enhanced performance in both pressure and temperature resilience, making it suitable for specialized applications.

Mechanical Strength Of Flanges for Pressure Vessel

Items	Value
Elongation ( A )	24% min
Yield Strength ReH N/mm2	235 min
Tensile Strength Rm N/mm2	360 - 480
Impact Test ( J )	27 min

Benefits of Flanges for Pressure Vessel

01/

Sealing Efficiency: Pressure vessel flange connections provide a high-integrity seal that can withstand significant pressure variations and thermal cycles.

02/

Flexibility and Adaptability: This flexibility can be a significant advantage in complex systems or when future modifications are anticipated.

03/

Strength and Durability: Designed to withstand high pressures and temperatures, pressure vessel flange connections are robust and durable.

04/

Safety: Given their reliable sealing capability and robust design, pressure vessel flange connections contribute significantly to operational safety.

05/

Cost-Effectiveness: While the initial cost might be higher than some alternatives, the long-term benefits of ease of maintenance, durability, and safety can lead to lower overall costs.

06/

Pressure and Temperature Tolerance: Pressure vessel flanges are designed to withstand extremely high pressure and temperature ranges and are used in industries where extreme conditions are common.

Applications of Flanges for Pressure Vessel

Oil & Gas Industry: Used in upstream, midstream, and downstream applications, including drilling rigs, pipelines, and refineries.

Power Generation: Pressure vessel flanges are critical in steam turbines, boilers, and heat exchangers.

Petrochemicals: Used in reactors, pressure vessels, and piping systems where harsh chemicals and high pressures are common.

Chemical Processing: Pressure vessel flanges are employed in chemical plants where strong acids, alkalis, and high temperatures are present.

Aerospace: Used in high-pressure hydraulic and fuel systems, where reliability and safety are paramount.

Flanges for Pressure Vessel Installation Requirements

Prepare the pipe surface

Before installation, make sure the pipe surface is smooth and clean.

Consistent Torque

Ensure all bolts are tightened to the same torque to avoid uneven pressure on the flange.

Use Proper Tools

Utilize the appropriate tools, such as torque wrenches and alignment devices, for accurate installation.

Inspection and testing

After installation, conduct a thorough inspection to ensure a secure connection between the flange and fittings with no water leakage or seepage.

Corrosion and moisture prevention

After installation, take appropriate measures for corrosion and moisture prevention to extend the service life of the flange and pipes.

Compliance with safety regulations

Throughout the entire installation process, always adhere to relevant safety regulations and operating procedures to ensure the safety of construction personnel.

Customization Process

Initial Inquiry & Consultation

An initial discussion your requirements with our engineering or sales team. We may may suggest adjustments or recommend optimal solutions based on your product details.

Material Selection

Specify the material grade and desired properties (e.g., strength, corrosion resistance). If uncertain, our team can recommend suitable materials.

Quote & Proposal

Feasibility of the design. Production process (open-die, closed-die, ring rolling, etc.). Material availability and lead times. Once evaluated, the sales team will provide a detailed quote.

Customer Approval

Review the quotation and purchase order will be sent by email to confirm the order. Include any additional instructions or special conditions.

Contract Agreement

If applicable, sign a formal agreement outlining responsibilities, timelines, and warranties.

Manufacturing

Utilize processes such as forging, cutting, machining, and heat treatment to shape and refine the flange to the desired specifications.

Quality Inspection

Conduct dimensional checks, non-destructive testing (NDT), and mechanical property testing to ensure the flange meets quality standards.

Packaging and Delivery

The flange product is packed securely to prevent damage during transit. Products are labeled with relevant information, such as material grade, part number, and order details.

Other Services

Delivery Time: For stocks, we can send the goods to loading port within 7 days after receiving your deposit. For production period, it usually needs about 10days- 30days after receiving the deposit.

Package: Our staff wrapped flanges fittings with plastic foam individually, put them into wooden cases or pallets, bundled wooden cases with nylon rope.

Shipping Method: We offer sea and air shipping methods depending on your order quantity.

Payment Terms: Accepted payment methods are L/C, T/T, Paypal and Western Union.

MOQ: 1 pieces.

FAQ

Q: What are flanges for pressure vessels?

A: Flanges are essential components in the design and construction of pressure vessels. Flanges play a crucial role in maintaining the structural integrity and safety of pressure vessels.

Q: Working principle of flanges for pressure vessels?

A: In the design and selection of pressure vessel flanges, the overall sealing performance is the priority factor. When the flange bolts are tightened, the bolt pressure pushes the gasket through the flange ring, compressing and deforming the gasket. As the bolt force increases, the flange sealing surface and the sealing gasket are tightly combined to prevent the leakage of the fluid medium and form an initial sealing environment.

Q: What is the use of a flange in a pressure vessel?

A: Flanges are used to connect pipes with each other, to valves, to fittings, and to specialty items such as strainers and pressure vessels. A cover plate can be connected to create a "blind flange". Flanges are joined by bolting, and sealing is often completed with the use of gaskets or other methods.

Q: How do gasket materials affect the performance of a pressure vessel flange?

A: Metallic, semi-metallic and nonmetallic gasket materials interact with flange surfaces differently. Each of these gasket types require specific ranges of surface finish for optimum gasket performance with lowest leakage. Metallic gaskets require a smoother flange finish than either semi-metallic or nonmetallic.

Q: How do you prevent flange leaks in pressure vessels?

A: Prevent flange leaks with proper bolting practices. Bolts and gaskets behave like springs and unless flange bolts and nuts are properly tensioned the flange will leak. The correct tightening torque depends on bolt diameter, material of construction, process pressure and bolt fabrication.

Q: How often should pressure vessel flanges be inspected?

A: Each pressure vessel flange must be inspected or tested, usually once a year to every five years. The scope of the test or inspection should be sufficient to determine whether the condition of the pressure vessel is satisfactory and whether the pressure vessel is suitable for its intended purpose.

We're well-known as one of the leading flanges for pressure vessel manufacturers in China. Please feel free to buy customized flanges for pressure vessel at competitive price from our factory. Contact us for more cheap products.

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