1. Definition and Role

NFK flexible hoses are specialized components designed to connect pipeline sections or equipment in industrial gas systems. These hoses absorb vibrations, compensate for thermal expansion, and enhance system flexibility. They play a vital role in industries such as industrial gas production, chemicals, food processing, energy, construction, and the transportation of liquefied gases.

2. Types and Applications

At NFK Vietnam, flexible hoses for industrial gas are categorized as follows:

• Flexible hoses for gas cylinders: Used to adjust pipeline misalignment, absorb vibrations during operation, and simplify installation. Suitable for gases like Argon, N2, He, H2, O2, etc. Design pressure ranges up to 250 bar, with a typical temperature of ~40°C. Sizes range from 8A (1/4”) to 10A (3/8”), lengths from 300mm to 3000mm. Main materials are SUS304, SUS316L stainless steel, with various connector types.
  
  

  Cryotech source

• Flexible hoses for liquefied gas: Applied in the transfer of liquefied gases such as Argon, N2, He, H2, O2, etc. Design pressure is up to 50 bar, temperature from -196°C ~, sizes from 8A (1/4”) to 100A (4”), lengths from 300mm to 3000mm. Main materials are SUS304, SUS316L stainless steel, with various connector types.
  
  

  Internet Source

• Flexible hoses for tank trucks: Used for transferring liquefied gas from tank trucks to storage tanks, absorbing vibrations during pumping, and improving operational efficiency. Design pressure is up to 50 bar, temperature -196°C ~, sizes from 32A (1.1/4”) to 50A (2”), lengths from 300mm to 10,000mm. Main materials are SUS304, SUS316L stainless steel, with various connector types.
  
  

  Internet Source

3. Key Technical Features

• Materials: SUS304, SUS316L stainless steel for the hose core, braid, and connectors, ensuring durability, corrosion resistance, and high pressure and temperature tolerance.
• Protection: Stainless steel springs and cables enhance lifespan, prevent impact, and protect the hose neck and body.
• Oil treatment: Meets level 1 oil treatment, suitable for flammable gases.
• Quality control: 100% of products are tested for gas leakage and hydrostatic pressure, destructive testing, material verification, durability, and vibration before delivery (if any)

4. Packaging and Storage

• Laser-engraved logo, production date, and product information on every item.
• Packed in standard carton boxes, reinforced cartons, or wooden crates depending on size and customer requirements.
• Shock protection with paper/air bubble wrap, moisture protection with desiccant bags, and dust protection with PE covers on both ends.

5. Outstanding Advantages of NFK Products

• Flexible and easy to install, saving time and labor.
• Withstands harsh environments, high pressure, temperature, and strong vibrations.
• High durability and long service life thanks to stainless steel materials and strict quality control.
• Wide variety of types, sizes, and connectors to meet all application needs.

6. Market and Key Customers

NFK Vietnam is a 100% Japanese-invested company, with a factory in Thang Long 2 Industrial Park, Hung Yen, specializing in manufacturing flexible hoses and metal expansion joints for the industrial gas sector. Key customers include Nippon Sanso, Airwater, Air Liquide, Indochina, Cryotech, among others. NFK products are highly regarded for their quality, competitive pricing, fast delivery, and professional technical support.