Oxy acetylene welding pdf

When mixed together in correct proportions within a hand-held torch or blowpipe, a hot flame is produced with a temperature of about 200°C. CHAPTER II OXY-ACETYLENE WELDING AND CUTTING MATERIALS _Welding. Oxy-acetylene welding is an autogenous welding process , in which two parts of the same or different metals are joined by causing the edges to melt and unite while molten without the aid of hammering or compression. When cool, the parts form one piece of metal.

Safety for Oxyacetylene Welding Printed copies of this document are uncontrolled.

To provide safety guidance in the use in performing oxyacetylene welding. For all Employees, Instructors and Students who will be working with oxyacetylene welding equipment and 3. In oxy-fuel cutting, the metal is first preheated with the oxy - fuel flame to the ignition temperature. When the required temperature is reache the cutting oxygen is turned on, and the stream of pure oxygen is directed against the heated metal.

This ignites the iron or steel and starts the cut. SECTION -OXY - ACETYLENE WELDING. The oxyacetylene welding process uses a combination of oxygen and acetylene gas to provide a high temperature flame.

The high temperature flame melts the metal faces of the work-pieces to be joine causing them to flow together.

However, the oxy-hydrogen flame is virtually useless for welding steel. This heat is further used to melt interface surfaces of welding plates which are held together to form a joint. In this process, mostly oxy-acetylene gas is used as fuel gas. How to set the gas on a MIG welder? Why to use acetylene for welding?

Do I need to use acetylene for soldering? What to look for in an used oxy acetylene torch? The energy to form the joint between metal workpieces most often comes from a flame (e.g. oxy-acetylene) or an electric arc. Most welding involves ferrous-based metals such as steel and stainless steel.

Welding covers a temperature range of 8- 649ºC (5- 000ºF). Gas Cylinders Leakage around the spindle of the cylinder valve will be revealed by hissing and in the case of fuel gases, by a smell. Slowly open the main valve of the acetylene tank and adjust the acetylene pressure regulator to 5PSI (pounds to square inch). Open the needle valve on the torch and adjust the pressure on the acetylene regulators to show 5PSI. Go through the same procedure for the oxygen cylinder.

This leaflet is for people who use compressed gases for welding , hot cutting and similar processes. Competencies Given a functional oxy -fuel gas unit, instruction and demonstration of use, each student will be able to: A.

Pass a written test on safety and operation procedures on the oxy - acetylene unit with a minimum of 1accuracy. Oxy -Fuel Gas Welding I. The oxy-acetylene flame produces an intense bright light that causes discomfort and possible injury to the eyes. Acetylene production as a basic activity.

In order to comfortably and safely see the flame when welding or cutting, welding goggles must be worn. Shade – Oxy-cutting and gouging. Braze welding of light copper and steel. And this welding process is still very popular today, mainly because it does not require much equipment, and does not require power. The oxy - acetylene (and other oxy -fuel gas mixtures) welding torch remains a mainstay heat source for manual brazing and braze welding , as well as metal forming, preparation, and localized heat treating.

In addition, oxy -fuel cutting is still widely use both in heavy industry and light industrial and repair operations. Welding fumes and gases can cause long-term health issues.