Gas Metal Hose Installation Tutorial: 3-Step Self-Check to Ensure Zero Leaks

1. Pre-Installation Preparation

Required Tools:

Gas-specific sealing tape (PTFE/raw tape, do not use ordinary electrical tape)

Explosion-proof clamp + screwdriver (Stainless steel double-ring clamps are recommended, as they offer 50% better retention than single-ring clamps)

Soapy water + brush (for leak detection; do not use open flames!)

Gas alarm (for real-time monitoring after installation; models with automatic shut-off are recommended)

Contraindications:

Hose bend radius < 5cm (may cause metal layer fracture)

Near high-temperature sources (must be >30cm from the stove's hot zone)

Installation through a wall/cabinet (must be exposed for easy inspection)

2.3-Step Standard Installation Process

Step 1: Interface Preparation

Degrease the gas valve threads (wipe with a dry cloth, do not use lubricants)

Wrap the sealing tape counterclockwise (5-6 turns, ensuring all threads are covered)

Hose insertion depth must be ≥ 15mm (a "click" sound indicates it is secure)

Step 2: Double-Secure

First, hand-tighten the connection, then tighten it 1/4 turn with a wrench (overtightening may cause thread stripping).

The clamp should be positioned ≤ 2 cm from the connection. The torque should be between 0.8 and 1 N·m (calibrated with a torque screwdriver).

Step 3: Leak Self-Test

Mix dishwashing liquid and water (1:5 ratio) and apply to all connections. Observe for persistent bubbles (small bubbles = minor leak, large bubbles = major leak).

Open the gas valve for 10 minutes and verify with the alarm (concentration > 500 ppm requires rework).

Professional Advice

Quarterly Inspection: Shine a flashlight at the connection to observe for oily seepage (a sign of LPG leakage).

Replacement Period: Even though the metal hose has an 8-year nominal lifespan, it's recommended to replace it every 5 years (due to valve deterioration).

Emergency Measures: If a leak is detected, immediately close the main valve, open a window, evacuate, and call the gas company (do not touch any electrical switches!).

3.Emergency Response Guide for Gas Metal Hose Leaks

Step 1: Immediately implement the "3 Don'ts and 3 Dos" principles.

3 Don'ts (to avoid explosions):

Do not turn on any electrical appliances (including lights and exhaust fans);

Do not unplug the appliance (may generate sparks);

Do not touch metal objects (to prevent static sparks);

3 Dos:

Close the main valve (turn it 90° clockwise to shut off the gas supply);

Open all doors and windows (to create air circulation and reduce gas concentration);

Escape to a safe location outdoors (call the gas company for emergency repairs).

Step 2: Accurately locate the leak.

Self-check method:

Soap and water test method:

Mix dishwashing liquid and water (1:5 ratio) and apply to the hose connector/damaged area.

A persistent cluster of bubbles indicates a leak.

Stethoscope method:

Roll cardboard into a stethoscope shape and hold it close to the hose to listen for a hissing sound (note: LPG leaks may be silent).

Leak type and treatment: