1. Product Features

No welding required: The threaded flange is connected to the pipeline or equipment through a threaded connection, and no welding operation is required, so it is very suitable for some occasions where welding is inconvenient or removable.

Easy to install and disassemble: The threaded flange can be installed and disassembled quickly and conveniently, especially suitable for environments where the pipeline system requires frequent inspection and maintenance.

Good sealing: The combination of threaded connection and sealing gasket can provide better sealing and avoid leakage.

Strong adaptability: The threaded flange can be customized according to different pipeline specifications, materials and pressure levels, and has strong applicability.

Applicable environment: Mainly used in medium and low pressure environments, suitable for occasions that do not require excessively high pressure bearing capacity.

2. Main applications

Threaded flanges are suitable for some occasions that do not need to withstand high pressure or high temperature, and are widely used in the following fields:

Oil and gas industry: Mainly used in medium and low pressure pipeline systems, suitable for modification or maintenance of pipeline systems.

Chemical industry: Suitable for chemical delivery pipelines, especially in environments where welding is inconvenient, threaded flanges become a better choice.

Water treatment system: Connection between low-pressure water pipes and equipment in the water treatment industry.

HVAC (heating, ventilation and air conditioning) system: Suitable for the connection of medium and low pressure HVAC pipes.

Food and beverage industry: Stainless steel threaded flanges are often used in food-grade pipeline systems, which can ensure hygiene requirements while being easy to disassemble and clean.

3. Technical parameters

4. Product composition

Threaded flanges usually consist of the following parts:

Flange body: usually carbon steel, stainless steel or other alloy materials, choose the appropriate material according to the use environment.

Thread: There will be threads on the inside or outside of the threaded flange, which are connected to the pipe or equipment through threads. The threads can be British threads (NPT) or metric threads (BSPT), etc.

Sealing surface: The sealing surface of the threaded flange usually needs to be precisely matched with the docking parts, and is often equipped with sealing gaskets (such as graphite gaskets, rubber gaskets, etc.) to ensure sealing.

Bolt holes (optional): Some threaded flanges are designed with bolt holes, allowing the connection to be further reinforced by bolts to enhance the connection strength.

Gasket: Used to improve the sealing of the flange connection and avoid leakage problems caused by threaded connections.

5. Specifications and sizes

The specifications of threaded flanges are usually determined based on the outer diameter (DN), pressure level (PN), thread standard, etc. of the pipe. Common standards include:

Pipe size: from as small as DN15 (1/2") to as large as DN400 (16"), etc.

6. Thread standard:

National Pipe Thread (NPT)

Metric Thread (BSPT)

Others such as G-type thread, etc.

The size, thread specification and pressure level of threaded flanges can usually be customized according to customer needs.

7. Material selection

The material selection of threaded flanges directly affects its service life, corrosion resistance and applicable working environment. Common materials include:

Carbon Steel: Suitable for general medium and low pressure occasions, economical price, commonly used in oil, natural gas and other industries.

Stainless Steel: Has excellent corrosion resistance, suitable for chemical, food, pharmaceutical and other industries, especially in humid or corrosive environments.

Alloy Steel: Suitable for occasions requiring higher strength and temperature resistance, suitable for high temperature or high pressure environments.

8. Production process

The production process of threaded flanges mainly includes the following steps:

Raw material selection and cutting: Select appropriate metal materials according to design requirements, and cut the raw materials to ensure that they meet the flange size.

Turning and processing threads: The threads of the flange are accurately cut out by turning to ensure the tightness when connected to the pipeline or equipment.

Surface treatment: The flange surface usually needs to be cleaned, polished, sprayed, etc. to improve the corrosion resistance and wear resistance of the flange.

Quality inspection: Including strict inspection of the flange size, thread accuracy, material composition, etc. to ensure that it meets the standards.

Packaging and delivery: Qualified threaded flanges will be packaged and shipped to the location specified by the customer to ensure safety during transportation.

9. Installation and use

The installation of threaded flanges is relatively simple and usually includes the following steps:

Docking pipe cleaning: Before installation, the contact surface of the pipeline interface and the threaded flange should be cleaned to remove impurities and oil stains.

Threaded docking: Connect the threaded flange to the threaded part of the pipeline or equipment, tighten the flange manually or with tools to ensure that the threaded connection is firm.

Gasket installation: Place appropriate gaskets between flanges to ensure that there is no leakage at the connection.

Reinforced connection: Use appropriate tools to reinforce the threaded connection to ensure that the flange connection is firm and well sealed.

10. Quality control

The quality control of threaded flanges is very important and usually includes the following aspects:

Material inspection: All raw materials must pass strict factory inspection to ensure that the materials meet the requirements.

Processing accuracy: The thread accuracy, dimensional accuracy and flange surface quality during the processing process need to be strictly controlled.

Sealing performance: The sealing performance of the flange connection needs to be tested and inspected to ensure that it meets the design requirements.

Corrosion resistance test: For materials such as stainless steel flanges, corrosion resistance tests are required to ensure that they can be used stably and for a long time in a specific environment.

11. Packaging and transportation

Packing method: Threaded flanges are usually packaged in wooden boxes or waterproof films to prevent moisture or damage during transportation.

Transportation method: Choose the appropriate transportation method according to the order volume and transportation destination. Common ones are road transportation, rail transportation or sea transportation.

12. Price and Customization

The price of threaded flanges is usually related to factors such as its size, material, pressure level and market demand. The price of customized threaded flanges may fluctuate, but is usually quoted based on specific requirements (such as material, size, pressure level, etc.).

13. Summary

Threaded flanges are flange types connected by threads and are suitable for pipeline systems with medium and low pressures and those that do not involve high temperature and high pressure environments. It has the advantages of no need for welding and easy installation and disassembly, and is widely used in industries such as petroleum, chemical industry, and electric power. Through reasonable material selection, precise processing technology, and strict quality control, threaded flanges can provide reliable connection solutions for pipeline systems.