MENGATUR TEKANAN KERJA GAS PADA INSTALASI LAS OXY ACETYLENE WELDING (OAW) ATAU LAS KARBIT

Summary

This video provides a comprehensive guide on the correct pressure settings for oxy-acetylene welding. It explains the role of manometers in monitoring both oxygen and acetylene pressures, with a focus on the working pressures (2.5 kg/cm² for oxygen and 0.5 kg/cm² for acetylene). The video also includes a step-by-step process for safely opening the tank valves, ensuring that pressure is properly managed and not damaging the equipment. Additionally, the script covers the conversion of pressure units, from bar to kg/cm², to help viewers understand global and local pressure measurements. A valuable resource for those working with welding equipment.

Takeaways

• 😀 The video discusses the pressure used in oxy-acetylene welding.
• 😀 Manometers are used to measure both oxygen and acetylene pressures, with two types: one for cylinder pressure and one for working pressure.
• 😀 The pressure unit used in the video is kg/cm², while international journals often use bar for pressure measurements.
• 😀 1 bar equals 1.01972 kg/cm² and is used to compare pressure across different units.
• 😀 Oxygen's working pressure is typically set at 2.5 bar, which equals approximately 2.5493 kg/cm².
• 😀 Acetylene's working pressure ranges from 0.3 to 0.5 bar, which equals 0.3059 to 0.5098 kg/cm².
• 😀 When opening the gas cylinders, always ensure the manometer valve is loosened to avoid damage from sudden pressure jumps.
• 😀 If the manometer valve is too tight when opening the cylinder, the pressure may cause the manometer to burst.
• 😀 The working pressure for oxygen in oxy-acetylene welding is set at 2.5 kg/cm², and for acetylene, it is 0.5 kg/cm².
• 😀 Proper pressure regulation and safe handling of gas valves are essential to prevent equipment damage and ensure safety during welding operations.

Q & A

What is the primary topic of the video?

The video focuses on explaining the pressure settings used in oxy-acetylene welding, including how to adjust the pressures on the oxygen and acetylene tanks.

What are the units used for measuring pressure in the manometer?

The units used for pressure measurement in the manometers are kilograms per square centimeter (kg/cm²).

What is the common pressure unit used in international journals, and how does it relate to kg/cm²?

The common pressure unit used in international journals is the bar. 1 bar is equivalent to 1.01972 kg/cm².

How do you convert the pressure from bar to kg/cm² for oxygen?

To convert the pressure of oxygen from bar to kg/cm², multiply the pressure in bar by 1.01972. For example, a pressure of 2.5 bar is equivalent to 2.5493 kg/cm².

What is the pressure range for acetylene used in the welding process?

The pressure range for acetylene used in welding is between 0.3 bar and 0.5 bar.

How do you convert the pressure from bar to kg/cm² for acetylene?

To convert the pressure of acetylene from bar to kg/cm², multiply the pressure in bar by 1.01972. For example, a pressure of 0.3 bar is equivalent to 0.3059 kg/cm², and a pressure of 0.5 bar is equivalent to 0.5098 kg/cm².

What is the first thing to do when opening a gas cylinder valve for welding?

The first thing to do is ensure that the manometer valve is in a loosened position. This allows the pressure from the cylinder to first enter the pressure gauge, preventing damage to the pressure regulator.

Why is it important to loosen the manometer valve before opening the gas cylinder?

Loosening the manometer valve before opening the gas cylinder prevents the pressure from directly entering the pressure regulator, which could cause the regulator to break or be damaged.

What is the required working pressure for oxygen in oxy-acetylene welding?

The required working pressure for oxygen in oxy-acetylene welding is 2.5 kg/cm².

What is the correct working pressure for acetylene in the welding process?

The correct working pressure for acetylene is 0.5 kg/cm².