Custom 20K Steel Flange

20K Steel Flange Manufacturers

JIS B2220 20K Steel Flanges are high-pressure rating components designed according to Japanese Industrial Standards, widely used in piping systems that demand exceptional sealing integrity and structural strength.

At Jiangyin Zhonghai Precision Machinery Co., Ltd., we combine integrated in-house forging capabilities with high-precision CNC machining to offer a comprehensive range of 20K flanges, including Slip-On (SOP/SOH), Welding Neck (WN), and Blind (BL) types. Supported by our ISO 9001, PED, and TS certified quality systems, our 20K flanges ensure reliable performance under dynamic pressure cycles and complex industrial environments.

Core Advantages
 ·Expertise in JIS Standards: Strict adherence to JIS B2220 protocols, ensuring that chemical compositions and geometric tolerances perfectly align with the rigorous requirements of Japanese engineering projects.
 ·Vertical Production Integration: Our full production line—from raw material cutting and forging to heat treatment and CNC finishing—optimizes the internal grain structure, providing pressure resistance far superior to standard plate-cut flanges.
 ·Heavy-Scale & Custom Capabilities: With a capacity for single components up to 10 tons and diameters up to 4 meters, we excel in both standard supply and bespoke non-standard 20K forged parts based on client blueprints.
 ·Rigorous Quality Assurance: An independent QA department oversees all workflows, ensuring every product complies with international technical standards (JIS/ASME/EN) and specific customer requirements.

Key Features
·Superior Pressure Resilience: Optimized heat treatment processes ensure our flanges possess high yield strength and impact toughness under 20K pressure ratings.
·High-Precision Sealing Faces: Utilizing precision turning for JIS-specific sealing requirements (such as RF and GF) to ensure a perfect fit with gaskets for leak-free operations.
·Material Integrity: We select premium steel grades including SF440A, SS400, SUS304, and SUS316, all provided with complete Material Test Certificates (MTC).
·Flexible Manufacturing: We support everything from small-batch prototypes to mass production, providing rapid evaluation and delivery for both standard and modified structures.

Applications
Zhonghai 20K Steel Flanges are engineered for high-reliability environments:
·Petrochemicals: Refineries, chemical transport lines, and high-pressure reactor interfaces.
·Power & Energy: Industrial boiler networks, thermal cycle systems, and pump station connections.
·Marine Engineering: Ballast systems and engine room piping compliant with Japanese maritime standards.
·Heavy Equipment: Core connection components for pressure vessels, heavy machinery, and hydraulic systems.

Item Specifications / Details
Standard JIS B2220 (Japanese Industrial Standard)
Pressure Rating 20K
Flange Types SOP (Slip-on Plate), SOH (Slip-on Hub), WN (Welding Neck), BL (Blind)
Size Range 10A – 1500A (Custom sizes up to 4,000mm)
Common Materials CS: SS400, SF440A, S25CSS: SUS304, SUS316, SUS321AS: Customized per technical drawings
Manufacturing In-house Forging + Heat Treatment + CNC Machining
Surface Treatment Anti-rust Oil, Electro-galvanized, Hot-dip Galvanized, Black/Yellow Paint
Certifications ISO 9001, PED (2014/68/EU), TS
Inspection Dimensional, Hardness, Tensile, UT (Ultrasonic), MT (Magnetic Particle)

EXPERTS IN FORGED AND MACHINED FLANGES

[ WHO WE ARE ]

About Us .

Jiangyin Zhonghai Precision Machinery Co., Ltd.
  • Established

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  • Employees

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  • Tons / Month Capacity

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01.
Specification Coverage
Our production range spans sizes from 1/2” to 60”, with single-piece weights up to 10 tons and maximum dimensions reaching 4 meters.
02.
Applicable Scenarios
This comprehensive scope ensures reliable solutions for both standard and non-standard flange applications.
03.
Introduce Us
We are China 20K Steel Flange Manufacturers and Custom 20K Steel Flange Factory. With complete in-house forging, heating, CNC turning, drilling, and inspection lines, we handle both volume production and complex machined parts.

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20K Steel Flange Industry knowledge

20K Steel Flange: Why It's the Ideal Choice for Your Piping System?

In the industrial sector, flanges play a crucial role. They not only connect pipes but also ensure the sealing and stability of the system. In recent years, with the increasing demand for high-quality materials, 20K steel flanges have gradually become a very important choice in the piping industry. So, why are 20K steel flanges so popular? What advantages do they bring to your piping system?

What is 20K Steel?

20K steel is a high-strength, low-alloy steel, typically used to manufacture products requiring high mechanical strength. It has excellent machinability, strong corrosion resistance, and good weldability, making it widely used in pressure vessels, piping systems, and other applications requiring high pressure and high temperature environments. 20K steel flanges leverage these characteristics to become an indispensable part of the piping industry.

The manufacturing process of 20K steel flanges involves multiple steps, including forging and precision machining, to ensure its excellent strength and durability. This allows it to maintain good performance in high-temperature and high-pressure industrial environments.

Advantages of 20K Steel Flanges

1. Superior Strength and Pressure Resistance

20K steel possesses high yield strength and tensile strength, enabling 20K steel flanges to maintain stable performance even under high pressure environments. This is particularly evident in pipeline systems requiring high pressure, such as those in the oil, gas, and chemical industries.

2. Good Corrosion Resistance

The alloying elements in 20K steel enhance its corrosion resistance, resulting in superior performance in harsh environments. Even under prolonged exposure to moisture or chemicals, 20K steel flanges effectively prevent rust and corrosion, extending their service life.

3. Excellent Weldability

Welding is an indispensable part of flange manufacturing. 20K steel flanges exhibit excellent weldability, allowing for processing using standard welding techniques without significant degradation of material properties. This characteristic enables 20K steel flanges to connect better with other pipeline components in complex piping systems, ensuring overall system stability.

4. Adaptable to Multiple Standards

20K steel flanges can be flexibly manufactured to meet various industry standards and comply with multiple international standards. Jiangyin Zhonghai Precision Machinery Co., Ltd. specializes in providing flange products that meet standards such as GB, ASME, ASTM, JIS, EN, and DIN, ensuring reliable performance for customers in both domestic and international projects.

Applications of 20K Steel Flanges in Piping Systems

20K steel flanges are frequently used in piping systems requiring high strength, high pressure, and corrosion resistance. Here are some typical application areas:

Oil and Gas Industry

During oil and gas extraction, transportation, and processing, 20K steel flanges can withstand high pressure and high temperature environments, ensuring the safety and stability of the piping system.

Chemical Industry

During chemical reactions, piping systems are often exposed to corrosive substances; the corrosion resistance of 20K steel flanges ensures long-term stable operation of the pipeline.

Metallurgical and Steel Industry

These industries typically require high-strength, high-pressure piping systems, and 20K steel flanges can meet these stringent requirements.

Advantages of Jiangyin Zhonghai Precision Machinery Co., Ltd.

As a professional flange manufacturer, Jiangyin Zhonghai Precision Machinery Co., Ltd. is committed to providing high-quality flanges and forgings to global customers. We are ISO 9001 certified and possess multiple qualifications including PED, TUV, and TS, enabling us to provide high-standard, high-quality products.

1. Complete Production Capacity

Our company has complete in-house forging, heating, CNC turning, drilling, and inspection equipment to meet the needs of diverse customers. From standard pipe flanges to complex custom parts, we provide high-precision, high-quality manufacturing services.

2. Flexible Customization Services

We support complete customization based on customer drawings, ensuring products perfectly match your piping system requirements. Whether you need small 1/2'' flanges or large flanges with a maximum size of 60'' and a single piece weight of up to 10 tons, we can meet your needs.

3. Global Certification and Quality Assurance

As an ISO 9001 certified company, we strictly adhere to international quality management standards to ensure that every batch of products meets or exceeds customer requirements. We also possess multiple certifications, including PED, TUV, and TS, ensuring our product quality is recognized globally.

Frequently Asked Questions (FAQ)

1. What specifications of 20K steel flanges are available?

20K steel flanges are available in a wide range of sizes, from 1/2'' to 60'', to meet the needs of various piping systems, from small to large.

2. Which industries are 20K steel flanges suitable for?

20K steel flanges are widely used in the oil, gas, chemical, metallurgical, and power industries, especially in those with high requirements for pipeline strength, corrosion resistance, and high-pressure resistance.

3. Does Jiangyin Zhonghai Precision Machinery Co., Ltd. offer customization services?

Yes, we offer fully customized services, capable of producing 20K steel flanges of specific sizes and specifications according to your drawings, ensuring they perfectly meet your project requirements.

4. What are the advantages of 20K steel flanges compared to flanges made of other materials?

Compared to other materials (such as carbon steel, stainless steel, etc.), 20K steel flanges have higher strength, better corrosion resistance, and superior weldability, making them particularly suitable for use in high-pressure, high-temperature, and harsh chemical environments.

5. How do you ensure the quality of your 20K steel flanges?

Our company ensures that every flange product meets international quality standards through a rigorous quality control system. Furthermore, we have obtained multiple certifications, including PED, TUV, and TS, guaranteeing the reliability and stability of our products.