Fire Protection Watering Flexible Metal Hose

OriginZhengzhou, Henan, China
Nominal diameterDN10mm~DN300mm

Fire protection watering flexible metal hose
Product Description

Fire protection watering flexible metal hose mainly used in fire control system as an important equipment, it’s a high quality flexible pipe in modern piping system. Fire protection watering flexible metal hose has advantages of good flexibility, anti-corrosive, anti-fatigue, anti high and low temperature, absorb shock and reduce noise, good sealing and long service life. Watering flexible metal hose’s inner pipe is spiral or annular shape thin-walled bellows, and the bellows is made from thin-walled seamless or welding stainless steel pipe. Bellows elasticity determines that flexible metal hose has good flexibility and anti-fatigue, making it easy to absorb all kinds of cyclic loading, in this way to guarantee the stability of pipeline connection.

Related regulation states that some public places must be equipped with automatic fire extinguishing system, it’s better to have sprinkler system, then our fire protection watering flexible metal hose becomes the necessary fire control equipment.

Product features of fire protection watering flexible metal hose:

  1. Whole stainless steel structure helps reduce dust and pollutant, 100% anti-corrosive, ensure erupting water in emergency circumstances;
  2. Good flexibility, efficiently reduce stress caused by pipe arrangement error, and prevent fracturing;
  3. Easy to install, fast assemble, reduce labor cost;
  4. Good low temperature resistance, shock resistance;
  5. Convenient and fast displacement when reassemble and change design;
  6. When come across earthquake, watering flexible metal hose can move between ceiling and main pipe, avoid leakage and protect sealing;
  7. Long service life.


Nominal DiameterDN
Inner Diameter(mm)LD Outer Diameter(mm)OD Min Bending Radius(min)
Static State Dynamic State
20 20.0 22.5 110 220
23 23.0 25.5 240 220
25 25.0 27.5 130 260
28 28.0 30.5 140 280
30 30.0 33.1 170 340
32 32.0 35.1 180 360
35 35.0 38.1 190 380
38 38.0 41.0 190 380
40 40.0 43.1 210 420
42 42.0 45.1 210 420
45 45.0 48.1 230 460
50 50.0 53.1 250 500
55 55.0 58.1 270 540
60 60.0 64.0 320 640
65 65.0 69.0 340 680
product details


Vacuum bellows widely used in petroleum, chemical engineering, petrifaction, instrument, aerospace, electric power, cement and metallurgy industries.


our service

Pre-Sales Service

  1. According to product’s using condition, technicians will offer rationalization;
  2. Provide detailed product performance specification;
  3. Provide professional quoted price;
  4. Provide 24-hour technical consulting reply.

In-Sales Service

  1. Begin to supervise from raw material, its qualified rate can reach to 100%;
  2. Whole manufacturing process are in strict accordance with promised procedure requirements, product qualified rate can reach to 100%;
  3. Provide product’s inspection record of key junctures to customers;
  4. Provide production schedule photos to customers at regular intervals;
  5. Package and transport products strictly accordance with export standard.

After-Sales Service

  1. Under the premise of correct installation, normal maintenance and using, we guarantee one-year warranty period;
  2. When warranty period has expired, our sold products enjoys lifetime guarantee repair, we only charge cost price for changing product’s standard component and sealing component;
  3. During installation and adjustment period, our after-sale service staff will communicate with customers frequently to know product’s running state in time. Assist customers to install and adjust products until customers are satisfied;
  4. If product has malfunction during operation period, we’ll offer you satisfied answer in time. We’ll reply you within 1 hour and provide solution or send staff to spot within 24 hours after receiving maintenance notification.
  5. Lifelong free technical support. Conduct satisfaction survey and inquiry equipment running condition to clients by telephone or e-mail semiannually from the first day of equipment running, put on records of acquired information.


  1. What's the connection method of vacuum bellows?
    Chuck connection.
  2. What diameter you can produce?
    The minimum DN10mm, maximum DN300mm.
  3. Can the product be tested and provided with a pressure test report?
    Yes, it can be.
  4. Whether the product can be provided with raw materials inspection certificate?
    Yes, it can be.
  5. Can you provide flaw detection?
    Yes, but you need to tell us in advance and responsible for detection fee.
  6. Can you provide installation instructions?
    Yes, we can.

customers packaging & shipping

packaging & shipping


  1. Carton+wooden cases.
  2. Customized packaging can be available.


  1. We can ship the goods to you by International Express such as DHL,UPS,TNT,EMS and so on.
  2. You can also choose the appropriate one based on your timeline and budget.
  3. You can choose to use your own shipping agent.
Shipping method Note
Express Door to door, very convenient, don't need to clearance or pick-up
By air Airport to airport, you need to do the customs clearance and pick up the goods at your local airport, which you can have a local shipping agent to do for you.
By sea Port to port and you need to do the customs clearance and pick-up the goods at your local port, which you can have a local shipping agent to do for you.


  1. Our company has a professional flaw detection team, can be real-time monitoring the quality of product.
  2. The production process is all-round monitoring to ensure that each production process are under control.
  3. Raw material reserves sufficient to timely delivery.
  4. Cooperate with many universities in China to ensure the advancement of product technology.
    Chanzhi Chanzhi5.3.2