The use of inert gas when soldering
The high temperatures used in soldering, oxidation products (scale) form immediately if the pipe comes in contact with air during soldering takes place. Inert gas, therefore, should be blown through the system during the soldering process. Send a small stream of dry nitrogen or other inert gas through the pipeline.
Do not start soldering, until there is no more air in the component(s). Start the process with a strong flow of inert gas. Flow reduction to a minimum when soldering start. Keep this little protective gas consumption throughout the entire process of soldering.
Soldering must be met with oxygen and gas, with a slight deficit of oxygen and relatively large burner jet. Solder shall not be used until the melting temperature is reached by parts connected together.
Economic soldering
Never use more solder than is necessary, otherwise there is a risk of blocking pipes partially or completely. Solder so quickly, that the absorption of oxygen property flow is not broken, soE. no more than 15 seconds.
Be careful with temperature
The temperature should not be higher than necessary.
So draw the flame slowly when the melting temperature is reached. External flux residues must be removed by brushing hot water. Alloys based on tin or lead, is not recommended as solders for cooling systems.
Flare connections (copper pipes)
Use only approved for cooling copper pipes. Cut ends at a right angle to the pipeline. Remove all internal and external burrs. Do glare right size, neither too small nor too large. Do not compress flash so much that it becomes difficult. Leave the final tightening until the actual installation.
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Chillers