Hard drawn copper tubing connections for refrigeration systems may be made by which of the following means?
• Properties of hard drawn copper tubing versus soft copper • Standard, safe methods used to join refrigeration tubing • Which joining methods would damage copper or are not normally used on tubing
• Which of these methods is commonly used on thin-wall tubing rather than on thick pipe? • Which method involves very high temperatures that could melt or distort small copper tubing walls? • Which methods are normally used for steel pipe, not small copper refrigeration lines?
• Eliminate any methods that would weaken or crack hard drawn copper • Focus on methods specifically referenced in refrigeration service manuals and codes • Ask whether the joint type allows for a leak‑tight, pressure‑rated connection on copper refrigeration tubing
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