Flame enters into the nozzle or torch and continue burning. In very rare cases, the puncture wound can become infected. 7 - Using Table 7-4, answer the following: a . This will be done starting with the cylinders and ending with the torch tip. If the flashback arrestor is torch mounted, there is potential for foreign material to enter the system and plug the device. i got a small length of copper and made a cut down the length (bout a 3cm cut) and roled the end into a nozzle. After purging the lines, light the torch with only the fuel gas valve open. An element in biaxial stress is subjected to stresses a = -29 MPa and sy = 57 MPa. 7 - Why is it important to make good-quality cuts? You may experience bruising, redness, and pain at the puncture site. In addition to the arrestor, the regulator end of the hose should have a non-return valve and a temperature actuated cut-off valve, while the torch end also needs a non-return valve. Flint . 7 - When using an ordinary welding table, what can be... Ch. This is defined as a sustained burning of the flame back inside the torch, usually at the mixer, but could also happen further upstream under the right conditions. A backflow device is designed to prevent gases from the torch from mixing and flowing back into the hose lines which is a dangerous situation. ), Systems Analysis and Design (Shelly Cashman Series) (MindTap Course List), Principles of Geotechnical Engineering (MindTap Course List), Network+ Guide to Networks (MindTap Course List), Fundamentals of Geotechnical Engineering (MindTap Course List), Fundamentals of Chemical Engineering Thermodynamics (MindTap Course List), Engineering Fundamentals: An Introduction to Engineering (MindTap Course List), Enhanced Discovering Computers 2017 (Shelly Cashman Series) (MindTap Course List), Principles of Information Security (MindTap Course List), A+ Guide to Hardware (Standalone Book) (MindTap Course List), Welding: Principles and Applications (MindTap Course List), Find more solutions based on key concepts. 7 - What can happen if acetylene is used on a tip... Ch. Regardless of the type of torch you use, both the check valves and flashback arrestors are necessary. This is done to compensate for increased voltage as the arc stretches. The consequence can range from a burst hose to a violent explosion of the regulator and cylinders. 7 - What is used to reduce the high cylinder or system... Ch. Back fire is an incident when the welding flame disappear suddenly with violent or hissing sound. Mechanics of Materials (MindTap Course List), Precision Machining Technology (MindTap Course List), International Edition---engineering Mechanics: Statics, 4th Edition, Automotive Technology: A Systems Approach (MindTap Course List), Principles of Information Systems (MindTap Course List), Database Systems: Design, Implementation, & Management, Steel Design (Activate Learning with these NEW titles from Engineering! The TORCH viral screens are simple, low-risk blood tests. What is meant by the term the soft side of implementing change? 7 - How can a hose be checked for leaks? try and get your tip really small. How does a physical security program... What decisions are critical for success in a career that interests you? For long lengths of hose, fit arresters on both the torch and the regulator. Ch. 7 - What is a combination welding and cutting torch? • Never operate the torch at pressures (of oxygen-acetylene) which are lower than the required pressure for the particular torch tip used. Always have approved fire extinguishers nearby and have all personnel trained in their proper use. 7 - Sketch the proper end shape of a soapstone that is... Ch. Careful programming of the lead-out and torch height control function can minimize this. 1. If you look at the torch you will notice a small cylindrical valve on each inlet with the hoses screwed onto this valve instead of hooked directly to the torch. It is each operator’s responsibility to give, at least a brief, inspection to the equipment that is to be used. Oxygen... Ch. Protecting cylinders from flashbacks: Fit flashback arresters to both the oxygen and fuel gas hoses near to the regulators. Inspect your Cutting torch and oxy fuel welding equipment before using. Ch. You may experience bruising, redness, and pain at the puncture site. For hoses longer than 3m, an additional flashback arrestor is needed at the torch end. Why should you wipe off the outside of a zerk fitting before injecting grease into it? Never light your torch with a mixture of fuel and oxygen. Reply. 7 - What is the purpose of a reverse flow valve? ... What is likely the problem if the Kerf edges are melting back together behind the cut? That’s why it is sometimes called ‘welder’s flash’ or ‘arc eye.’ Ch. When more than 15 pounds of pressure is used, acetylene becomes unstable and decomposes explosively. This will further restrict gas flow and starve the tip. When piercing hols in a plate you should do what with the torch? For this reason, a flashback arrestor is … If using acetylene, keep the pressure below 15 pounds. Victor Torch Safety Flashback,Backfire, and sustained Backfire. It protects the user and equipment from damage or explosions. Before welding, take time to inspect the equipment you will be using to be sure check valves and flashback arrestors have been installed. *Response times vary by subject and question complexity. You hear a pop sound. Tap the Torch button. 7 - What is the purpose of a reverse flow valve? 7 - State one advantage of owning a combination... Ch. Ancient Romans invented and used that kind of torch. Bleed the valves on the torch body. Hot flashes may impact your daily activities and quality of life. Most of these valves are combination flashback/check valves and will say so on the valve body. Gas Pressure: One cause of fires and explosions is high acetylene pressure. Increase fuel gas flow until flame leaves end of tip and no smoke is present Decrease until flame goes back to tip Open oxygen valve and adjust to neutral flame Depress oxygen lever and … 7 - How does an injector-type mixing chamber work? The backfire only happens in the tip. 7 - Why are some copper alloy cutting tips... Ch. Ch. Pocket lighter. Ch. While some parts of a torch can be repaired others (like the regulator and hose) must be replaced. Flash Torch free download - Adobe Flash Player, Flash Movie Player, Flash Player Pro, and many more programs • Never use damaged tips. Torch is a rod-like piece of wood with the rag wrapped around one end, which is dipped in some flammable fluid and lit. 7 - Why is the oxygen valve turned on before starting... Ch. When it comes to Brazing and Soldering Torch Tips, Grainger's got your back. BACKGROUND The use of gas welding dates back to the middle 1800’s where a mixture of Oxygen And Hydrogen were used […] Highlights. 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