Because the fluid is hot and it is under high pressure.
High pressure line gets very hot.
The high pressure line is a high pressure hydraulic line. The can leak from the attachments to the fittings. The will leak where the line is damaged Or if it as a very old line they can crack.
No, the liquid (discharge) line is the high pressure side. The suction line is the low pressure side.
It don't have a low pressure valve. the high pressuer sensor is in the high pressure line next to the raditor. It don't have a low pressure valve. the high pressuer sensor is in the high pressure line next to the raditor.
NO!
High side and low side refer to the pressure in the ac system. Ie The high side is the high pressure line and low side is the low pressure line.
The high pressure charging valve is located either on the high pressure line or the muffler, and the low pressure charging valve is located either on the accumulator or low pressure line.....
They may be marked "S" and "D" for suction (low side) and discharge (high side). A simpler way would be to look at the lines going into and out of the AC.... the smaller line will be the high pressure line, while the larger line will be the low pressure line. The low pressure line will connect at the compressor inlet, and the high pressure line will connect at the compressor outlet.
Are you sure you're connecting to the low pressure line instead of the high pressure line? The low pressure line should have a blue or black dust cap on it, while the high pressure line should have a red dust cap on it.
The low side hose is the larger one coming from the a/c compressor to the a/c compressor... The high pressure charging valve is located either on the high pressure line or the muffler, and the low pressure charging valve is located either on the accumulator or low pressure line.
High oressure CO2 line was used for a lining to create bombs
the low pressure side is usually the line that is the thickest. the thinner line is the high side.