Official website ★ Zhejiang Zhifeng Flange Technology Co., Ltd., a professional manufacturer of stainless steel flange pipe fittings, +86-577-8171 5777, www.china-zhifeng.com

Many years of manufacturing experience in stainless steel flange industry

Since its establishment, Zhifeng has been committed to providing every customer with high-precision and high-quality stainless steel flange pipe products, and serving customers from all over the world with our greatest sincerity.

Company Profile

Zhejiang Zhifeng Flange Technology Co., Ltd. has been committed to providing customers with high-quality flange pipe fittings products and services.

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Qualification

The qualifications and honors we have obtained are also an inspiration and spur to create tomorrow's glory!

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Quality

It has its own production workshop, high-precision CNC machine tools and machining centers, and complete inspection and testing equipment.

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Download

Our current standard product catalog includes a variety of product models. Click here to view and download our catalog.

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Our products

Main products: stainless steel flat welding flange, neck flange, butt welding flange, ring connection flange, insertion flange, loose sleeve flange, threaded flange, pressure vessel flange, pipe plate, Large-caliber flange, non-standard flange customization, stainless steel pipe fittings, etc.

Regular flange

Conventional flange

Product material:
SS304,304L,316,316L,2205,904L and special material customization
Product caliber:
1/2"~80" (DN15~DN2000mm)

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Large-caliber flange

Product material:
SS304,304L,316,316L,2205,904L and special material customization
Product caliber:
1/2"~80" (DN15~DN2000mm)

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Non-standard flange

Product material:
SS304,304L,316,316L,2205,904L and specialty customization
Product caliber:
1/2"~80" (DN15~DN2000mm)

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Pipe plate

Product material:
SS304,304L,316,316L,2205,904L and special material customization
Product caliber:
1/2"~80" (DN15~DN2000mm)

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Pressure vessel flange

Product material:
SS304,304L,316,316L,2205,904L and specialty customization
Product caliber:
1/2"~80" (DN15~DN2000mm)

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Stainless steel pipe fittings

Product material:
SS304,304L,316,316L,2205,904L and special materials customization
Product caliber:
1/2"~80" (DN15~DN2000mm)

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Quality

Quality Control

It has a high-precision CNC machining center, and it is suitable for all products. 100% internal testing and inspection to ensure quality.

Support Custom

We have an excellent technical team, Non-standard products can be customized according to customer requirements and samples

Competitive Prices

With our own factory, we offer competitive prices Provide products of expected quality and win recognition from many customers

One-Stop Service

Zhifeng has a channel team that can respond quickly anytime, anywhere, And give professional advice and considerate after-sales service.

Longmen processing

CNC programming

End face processing

Gantry flange processing

Fland processing

Processing equipment

Flange processing

Oil and gas industry

Petrochemical industry

Coal industry

Power industry

Metallurgical industry

Natural gas industry

Pharmaceutical industry

Paper industry

Water treatment industry

The latest news

2024-09-30

Full Analysis of Chemical Flange PN Series Standards: Identification Details Revealed

"HG20592-2009" is the standard number implemented by the flange. HG/T 20592-2009 here is the "PN series" standard in the chemical standard, while the "Class series" standard is HG/T 20615-2009. Due to the large number of flange standards, in order to facilitate identification, it can be remembered that the beginning of HG is the chemical standard, the beginning of GB is the national standard, the beginning of JB is the mechanical standard, the beginning of SH is the petrochemical standard, and the beginning of CB is the marine standard.

2024-09-30

Flanged connection vs clamp connection: how to choose the best pipe connection method?

1. The structure is complex but stable: the flange is connected through two pipes or equipment with flanges, and then the flange is bolted to form a whole. The structure is relatively complex, but the connection is more stable. 2. Excellent sealing performance: the sealing gasket between flanges can effectively prevent media leakage and ensure the safety and stability of the connection. The materials of flange gaskets will also be selected according to the pressure level, from low-pressure asbestos pads, high-pressure asbestos pads and tetrafluoro pads to metal pads.

2024-09-30

Flange sealing and leakage sealing treatment method

There are many factors that affect the flange sealing. Mainly: bolt prestressing force; sealing surface type; gasket performance; flange stiffness; operating conditions. For decades, the ANSI flange designed by the National Standards Institute of the United States has provided a suitable sealing technology for the oil and gas industry, and has been very effective. However, as the demand of the oil and gas industry has changed, the defects of the ANSI flange are constantly exposed. Cost-effectiveness principles, environmental protection, and optimal health and safety assurance are the three major issues facing operators and contractors in the 21st century, so people began to consider new flange sealing methods.

2024-09-30

How to identify and select flange gaskets!

The gasket is the main seal of the flange connection, so the correct selection of gasket is also the key to ensuring that the flange connection does not leak. According to the different materials, gaskets can be divided into many types. In addition to the type of gasket, the identification and selection of the gasket are also very important!

2024-09-30

Examples of flange marks and marks

The flange should be marked according to the nominal diameter, nominal pressure, sealing surface form code, the series code of the steel pipe used (the code of the metric pipe is "Series 2", and the imperial pipe is not marked) and the standard number. Marking example: convex welded steel pipe flange with nominal diameter of 80mm and nominal pressure of 4.0MPa (25bar) (with meter tube)

2024-09-30

Why do the production of flanges and valves require heat treatment?

Ordinary flanges and valves generally do not require heat treatment. But sometimes, when they have requirements for strength, hardness, rust resistance, etc., heat treatment is required. Heat treatment refers to a metal heat processing process in which the material is heated, insulated and cooled to obtain the expected structure and performance in the solid state. The valve is a control component in the fluid conveying system, which has the functions of shut-off, regulating, guiding, preventing countercurrent, regulating pressure, diverting or overflowing.

2024-09-30

What is a flange? What is the use of the flange?

Flange is a disc part, which is most common in pipeline engineering. Flanges are used in pairs. In pipeline engineering, flanges are mainly used for pipeline connection. In the pipes that need to be connected, a flange is installed in various ways. Low-pressure pipes can be wired flanges, and welding flanges can be used for pressures of more than 4 kg. A sealing point is added between the two flanges, and then fastened with bolts.

2024-09-30

Pressure level of valves and flanges

According to ASME B16.5, the steel flange has 7 pressure levels: Class150 - 300 - 400 - 600 - 900 - 1500 - 2500 The pressure level of the flange is very clear. The flange of Class300 can withstand more pressure than that of Class150, because the flange of Class300 needs to be made of more materials, so it can withstand greater pressure. However, the pressure capacity of the flange is affected by many factors. The pressure level of the flange is expressed in pounds, and a pressure level is expressed in different ways. For example: 150Lb, 150Lbs, 150# and Class150 have the same meaning.

2024-09-30

Do you know all eight kinds of flange gaskets? Introduction to the occasion and scope of use

Natural rubber is suitable for water, seawater, air, inert gas, alkali, salt aqueous solution and other media, but it is not resistant to mineral oil and non-polar solvents. The long-term use temperature does not exceed 90℃, and has excellent low-temperature performance. It can be used above -60℃. Nitrile rubber is suitable for petroleum products, such as petroleum, lubricating oil, fuel oil, etc. The long-term use temperature is 120℃, such as 150℃ in hot oil, and the low temperature is -10~-20℃.

2024-09-30

Overview of plug-in welding flange

The plug-in welding flange refers to the flange inserted into the flange ring ladder at the end of the pipe and the outer flange. There are two types of neckless and neckless. The flange with neck tube has good rigidity, small welding deformation, and good sealing. It can be used in situations with a pressure of 1.0~10.0MPa. The B-type flange for containers is also a plug-in welding flange, which is used in occasions with high sealing requirements. When designing, the plug-in welding flange can be checked according to the integral flange.

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Tel：+86-577-8171 5777

Fax：+86-577- 8165 1666

E-Mail：chinazhifeng@163.com

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