Kitchen safety line of defense: How do stainless steel bellows prevent gas leaks?

1. Hidden dangers of traditional rubber tubes

Risk of aging and cracking

Rubber materials are prone to hardening and cracking in high temperature and oily environments (aging rate of 47% in 18 months)

Threat of animal bites

Cockroaches, mice, etc. can easily bite through the rubber tube wall

Surveys show that 17% of rubber tube leaks are related to animal damage

Problem of falling off at the connection

Clamp fixing method is easy to loosen (annual loosening rate is about 6.3%)

2. Protection mechanism of stainless steel bellows

Material-level protection

304 stainless steel body

Temperature resistance range -20℃ to 150℃, completely covering the gas use environment

Tensile strength ≥530MPa, 80 times that of rubber tubes

Composite protective layer

Outer PVC flame retardant coating (oxygen index ≥32)

Inner anti-corrosion coating resists corrosion of sulfides in gas

Structural-level protection

Corrugated buffer design

Absorbs stress caused by stove displacement (allowable displacement ±15mm)

Seismic performance passes GB/T 26081 standard test

Anti-drop interface

Threaded + sealing ring double locking structure

Tightening torque ≥ 25N·m safety threshold

3. Key points for installation and maintenance of stainless steel bellows

Ø Professional installation specifications

Qualification requirements

The installation must be performed by professionals certified by the gas company

Construction personnel must hold a "Gas Appliance Installation and Maintenance Qualification Certificate"

Pre-installation inspection

Confirm that the bellows complies with the national standard GB/T 26081

Check that the pipe body has no indentation, deformation or other transportation damage

Measure the actual installation length (leave 5cm margin)

Correct connection steps ① Use a special anti-drop thread interface ② Apply special gas sealant (temperature resistance ≥150℃) ③ Tighten with a torque wrench (25-30N·m) ④ Immediately test air tightness with a leak detector after installation

Ø Environmental requirements for use

It is forbidden to pass through confined spaces such as walls and cabinets

Keep the entire process visible and inspectable

Keep away from high-temperature heat sources (distance ≥50cm)

Avoid contact with sharp metal edges

Ø Key points for daily maintenance

Regular inspection system

Monthly self-inspection: soapy water to test each interface (observe whether bubbles appear)

Every six months: Check whether the surface of the pipe body is oxidized and deformed

Every 2 years: entrust a professional organization to conduct pressure testing

Abnormal situation handling

Immediately stop using and replace the pipe body if it is dented or corrugated

When you smell a gas odor: immediately Close the valve → Open the window for ventilation → Contact a professional

Smart equipment: Replace the sensor battery regularly (recommended once a year)

Ø Replacement standards

Situations of mandatory replacement

8 years of use (even if the appearance is intact)

Visible mechanical damage

Loosening of the interface

Failure of the smart alarm device

Upgrade suggestions

Give priority to smart products with automatic cut-off function

Commercial places are recommended to actively replace every 5 years

Ø Safety warning

Self-disassembly and modification are strictly prohibited

Different gas sources (natural gas/liquefied gas) cannot be mixed with the same type of pipe

The sealing must be re-tested when moving gas appliances