Page 198 - CITS - Fitter Trade Pactical - Volume - 2

FITTER - CITS

The pressure can be read on the working pressure gauge of gas regulators
Testing for leakage

All connections must be tested for leakage.
Apply soap water solution for acetylene connections and fresh water for oxygen connections (Fig 16).

Fig 16

Use of soap water on oxygen connections may lead to fire hazards.
Never use matches or flame light during leakage test.
Lighting the flame

Attach the recommended size of nozzle to the neck of the welding blowpipe i.e nozzle No.3.
Open the gas cylinders and adjust the recommended gas pressures on the regulators.
The pressure of oxygen and acetylene is 0.15 kg/cm2 for nozzle no.3
Open cylinder valves very slowly.

While setting pressure on the regulator, keep the blowpipe control valve open for accurate setting.
Open the acetylene control valve 1/4 turn on the blowpipe and ignite with a spark lighter. (Fig 17) Acetylene burns
using the oxygen in the atmospheric air with a black smoke.

Fig 17

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CITS : C G & M - Fitter - Exercise 53