These articles cover oxyfuel welding basics, with some focus on oxyfuel equipment, oxyfuel welding of various metals and alloys, and oxyfuel welding positions.
Acetylene is a heavily used gas in oxy-acetylene welding. It is an organic substance, composed of only carbon and hydrogen at the molecular level. Its’ molecular construction consists of two carbon atoms bonded to each other through a triple bond. Each carbon atom in turn is bonded to one hydrogen atom through a single bond. … Read more
It is essential that only a trained operator handle the equipment for oxyacetylene welding. Shutting down oxyacetylene welding equipment is as important as starting it up. Acetylene is a highly inflammable gas, and if it leaks, it can cause a fire and cause harm to life and property. In order to avoid accidents, and ensure … Read more
Gas leakage occurring between the regulator seat and the nozzle of the cylinder is a commonly found issue acetylene cylinders used for oxyfuel welding. This issue is usually called as the ‘creeping regulator’. It occurs due to foreign matter lodged between the seat of the regulator and the nozzle. It is indicated when the pressure … Read more
The oxyacetylene torch is a vital component of oxyacetylene equipment. Broadly speaking, it receives gas supply from the two gas cylinders (one for acetylene and other for oxygen), mixes them, and delivers them to the point of flame. Robust and precise construction of the oxyacetylene welding torch is important for obtaining a quality weld, and … Read more
Fillet weld is the easiest way to join two metals. It requires no joint preparation, and can be completed in no time, and is cheaper. Due to this reason fillet weld is a very popular choice of weld among designers. A fillet weld can be used to join all five types of basic joint types: … Read more
This article discusses different oxyfuel welding positions such as flat, horizontal, vertical, and overhead. At the end is a small discussion on oxy-fuel forehand welding and oxy-fuel backhand welding. OxyFuel Welding Flat Position OxyFuel flat position welding is performed from the top side of the joint. The face of the weld is horizontal in this position. … Read more
***Oxy-fuel welding in the vertical position requires a ***technique in order to keep the molten metal from running downward. In vertical position welding, the axis of the weld is approximately vertical. When welding is done on a vertical surface, the molten metal has a tendency to run downward and pile up. A weld that is not carefully … Read more
In the OxyFuel backhand welding method, the torch precedes the welding rod, as shown in figure 11-5. The torch is held at approximately a 45-degree angle from the vertical away from the direction of welding, with the flame directed at the molten puddle. The welding rod is between the flame and the molten puddle. This position … Read more
a. General. Overhead welding is performed from the underside of a joint. b. Bead welds. In overhead welding, the metal deposited tends to drop or sag on the plate, causing the bead to have a high crown. To overcome this difficulty, the molten puddle should be kept small, and enough filler metal should be added to obtain … Read more
a. Welding cannot always be done in the most desirable position. It must be done in the position in which the part will be used. Often that may be on the ceiling, in the corner, or on the floor. Proper description and definition are necessary since welding procedures must indicate the welding position to be … Read more