Oxy acetylene flashback arrestor requirements pdf free This should result in safe and accident-free use of your oxy-fuel equipment. It is always better to place the safety devices at the rear of the torch than at the regula All hose in use, carrying acetylene, oxygen, natural or manufactured fuel gas, or any gas or substance which may ignite or enter into combustion, or be in any way harmful to employees, shall be inspected at the beginning of each working shift. The equipment used today is safe, but every year, hundreds of employees are injured or die as a result of improper use. Flame or flashback arrestors used in oxy-acetylene equipment setups are a key Jan 30, 2019 · With new standards for vessels with flammable cargoes, compliance is important to minimize the risk of fires and explosions. Like check valves, flashback arrestors must also be tested and changed periodically. The Series 801-7007 and 801-7008 Flashback Arrestor is an economically priced safety device suitable for installation at the inlets of hand or machine oxy-fuel gas torches. THE ARRESTORS STOP THE FLAME OR REVERSE FLOW OF GAS BACK UP INTO THE STORAGE BOTTLES OR SUPPLY LINE. Preventing Welding Flashback Oxy-acetylene torches have been used for many years for cutting, welding, brazing, and heating of metals. REQUIREMENTS: It is the responsibility of the employer/owner/operator to ensure that Flashback Arrestors are fitted to all oxy/fuel plants and comply to the manufacturer’s standard and NZ Health and Safety requirements. Gas Pressure: One cause of fires and explosions is high acetylene A flashback arrestor can be installed on the torch handle instead of a check valve. ISO 5175-1:2017 does not apply to the use of safety devices incorporating flame arrestors for applications with premixed oxy/fuel or air/fuel gas supply systems, e. 59 / ea. Purge the lines before and after usage Always wear protective clothing Use proper eye protection If flashback occurs, immediately turn off the O 2, then the acetylene, and allow unit to cool Always work in a well ventilated area Always light the acetylene first Oxygen cylinders must be opened the whole way A flashback arrestor can restrict gas flow if it is too small for the application, causing backfires, short tip life, poor quality work, and even equipment damage. The valve ensures quick shut off against dangerous decomposition of acetylene in the high pressure parts of the manifold. Flashback Arrestors: Prevents a flame from traveling past the flashback arrestor in the event of a flashback. 253, Oxygen-fuel gas welding and cutting. GENTEC® flashback arrestors are available for regulators, torches, and pipes. docx), PDF File (. The cylinders should be fitted with regulators, to control the pressure and flow of gases. And finally, be extremely careful with flashback arrestors in heavy heating applications. g. INTRODUCTION Check Valves and Flashback Arrestors are safety devices for protecting workers using oxyfuel cutting and welding equipment. There are basically two types – hydraulic and dry type flashback arrestors. Acetylene Flashback Arrestor Sintered stainless steel flame trap quenches the flashback flame before it travels back further into the system causing damage and possible injury. A flashback arrestor can be in-stalled on the torch handle instead of a check valve. txt) or read online for free. Learn why testing both ends of your flashback arrestors is critical for safety in Aussie welding workshops. Knowledge and precautions can prevent fires and violent explosions. The document also covers cylinder transportation, flame types, welding procedures, and quiz questions/answers on OAW topics. Check valves do not prevent the propagation of a flame upstream (flashback) but are designed to prevent the unintentional backflow of gases into the cutting attachment, torch, hoses, or regulator which could cause an explosion or fire. Regulator and Torch mounted Flashback Arrestors for Oxy, Acetylene & LPG gas cutting & heating equipment. - Download as a PPT, PDF or view online for free OVERVIEW The PEC Flashback Arrestor Assembly with Relief Valve meets the NFPA 51 PF device requirements in a fuel gas manifold or bulk supply application. Suppliers of all common fuel gas systems recommend the use of flashback arresters (compliant with AS 4603) to prevent flames travelling back into the cylinders. Only oil-free air, oil-free nitrogen, or oil-free carbon dioxide shall be used to purge oxygen lines. It includes operational and installation checks such as the positioning of cylinders, presence of extinguishers, condition of hoses, and installation of flashback arrestors. Of course, there is no substitute for training and diligence among welders that utilize oxy-fuel equipment, but the use of flashback arrestors provides an additional safety net. 0 update, pressure regulators and flashback arrestors must be inspected annually and replaced every five years after the manufacturing date to prevent degradation and leakage. Shop oxy acetylene welding equipment, including acetylene regulators, torches and hoses. Jan 28, 1992 · This is a further response to your memorandum of October 4, 1991, in which you sought guidance as to when flashback arrestors and backflow protective equipment are required in fuel-gas supply systems, in keeping with the requirements of 29 CFR 1910. Flashback Arrestor Bodies extinguish flashes or flames before they reach the cylinder. Subsequent testing on similar flashback arrestors revealed that they had failed a flow test and reverse flow test. Used as specified, ESAB regulator and torch-mount flashback arrestors provide complete protection against the backflow of mixed gas within the cutting, welding or heating system Find everything you need for oxy fuel welding at Miller. Some equipment may vary. ESAB flashback arrestors ESAB’s range of flashback arrestors are all designed for optimum usage, giving high flow rates whilst still providing the highest levels of function and safety. The British Compressed Gases Association (BCGA) code of Practice 7 (CP7): The Safe Use of Oxy-fuel Gas Equipment (Individual Portable or Mobile Cylinder Supply) and Code of Practice 47 (CP47) The Safe Use of Individual Portable or Mobile Cylinder Gas Supply Equipment, provide guidance on maintenance and recommend, for example, that regulators and flashback arrestors are checked annually, both Flashback Arrestors How They Work A flashback arrestor is a gas safety device most commonly used in oxy-acetylene welding and cutting. GENTEC® Flashback Arrestors are specially designed to prevent personal injury and damage to equipment from severe flashbacks. Equipment includes cylinders storing oxygen and acetylene at high pressures, regulators to reduce pressure, and hoses. May 21, 2025 · A split-second flashback can ruin a life. For many years hydraulic flashback arrestors were the only type available. Quantity Order Qty of 1 equals (1) 2 Piece Set Add to Cart Compare Miller/Smith Flashback Arrestor Oxy/Fuel Pair Torch Mount, B 9/16-18 Connections MSC# 05924030 Mfr# H743 0 In Stock In Stock Web Price $132 We would like to show you a description here but the site won’t allow us. • FLASHBACK IS NEEDED WHENEVER FUEL GAS IS BEING USED IN PERMANENT PIPING WITHIN A BUILDING • FLASHBACK ARRESTOR CAN BE PUT AT MAIN SOURCE (OPTION A), PUT IN BRANCH PIPING (OPTION B), OR IN OUTLET PIPING (OPTION C) • IF FLASHBACK ARRESTOR INCOPORATES A LIQUID, THE LIQUID Flashback occurs when acetylene flow rate is lower than torch demand. Oxy-fuel systems using acetylene shall be fitted with a flashback arrestor within one metre of the pressure regulator and with a non-return valve, to prevent the return of gas towards the cylinder. Flexible hoses are used to connect the regulators to the torch or blowpipe. • Oxy-Arc can also produce larger customized powder delivery systems depending on your specific applications and requirements. Oxy-acetylene equipment must be prepared correctly (as described in these notes), before being used. c) A leak between the ball valve before the flashback arrestor and the non-return valve of the flashback arrestor. There is no substitute for training and diligence among those who operate oxy-fuel equipment. flashback arrestors work How Flashback Arrestor work? | Messer Cutting Systems India How To Set Up Oxygen & Acetylene torch for beginners NFPA and OSHA Compliant Safety Devices Pipeline flashback arrestors are safety devices that are used on pipelines conveying flammable gas. If the flashback arrestor is torch mounted, there is potential for foreign material to enter the system and plug the device. Oxyfuel Safety – Flashback Arrestors flashback arrestor is a safety device that prevents the propagation of a flame upstream reducing the volume of gases available at the tip or nozzle of an oxyacetylene torch. . A check valve is a device that is designed to prevent the unintentional backflow of gases. However, the use of special technical safety devices such as flashback arrestors is now a requirement and a safety best practice to prevent incidents with oxy-fuel equipment. 2 Do I need to use flashback arrestors? Yes. Protect regulators and gas cylinder against flashback. This means testing at least once per year (with couplings coupled and uncoupled being tested every six months) for gas leaks and gas reverse flow. Remove the torch reverse flow check valves before installing the torch type flashback arrestor. The flashback arrestor is an automatic flame trap device designed not only to quench the flame but also to prevent the flame from reaching the regulator. Workers most at risk of injury from flashback includes those who use portable and mobile oxy/fuel gas systems for welding, heating or cutting metal in industries such as plumbing, engineering, demolition, farming, lift installing Jan 3, 2024 · Flashback arrestors can and will create some gas flow restrictions, so make sure the unit can supply enough gas flow to support the tip being used, because insufficient gas flow can cause equipment malfunctions. A flashback happens when the flame travels back into the hoses and reaches the gas cylinders, causing a potentially deadly explosion. By using the proper tips, rods and fluxes, almost any metal can be welded, heated or cut using the Oxy-Acetylene process. Our flashback arrestors are designed to be used both with gas cylinders and gas outlet stations and incorporate several safety functions: • Pressure activated cut-off to prevent further gas supply after a flashback (activated by the pressure shock in front of the flashback). The inspection must be signed off by a safety man and submitted for Equipment Oxy/acetylene equipment is portable and easy to use. Using IOXYGEN flashback arrestors COUId effectively enhance workplace safety and provide much more secure surroundings for users. The flashback arrestors and couplings must be tested at regular intervals by a trained and authorized person according to your local safety regulations. A flashback (flame) arrestor is a device that prevents the propagation of a flame upstream. Arrestors comply with ISO 5175 and arrestor parts are certified cleaned suitable for use with Oxygen service. The condition known as Flashback is defined as the return of the flame through the torch The average lifespan of a typical Flashback Arrestor is 18 months, depending on average use, by CGA and OSHA requirements for industrial applications. With the following functions, flashback arrestors can stop backfire and prevent accidents. Maintenance: -The flashback arrestor and coupling must be tested at regular intervals by a trained and authorized person according to your local safety regulations. s cut must have a clean cut over its All safety rules must be adhered to. This technical bulletin from UK P&I Club discusses the proper use and maintenance of oxy/acetylene equipment. Safety features include protection against flashbacks with a wide range of mixtures of oxygen or air with flammable gases including hydrogen, acetylene, methane, and LPG gases. BAM certification body has certified the gas welding equipment – Safety devices and quick-action couplings to meet the requirements listed in: May 4, 2018 · Preventing Welding Flashback - Oxy-acetylene torches have been used for many years for cutting, welding, brazing, and heating of metals. The hoses, valves, and flashback arrestors on much of the equipment inspected are often in poor condition or missing. Note that these devices reduce the volume of gases available at the tip/nozzle. Flashback arrestors, such as models available from Smith Equipment, may also contain a check valve, as in the case of the Smith Equipment device. For peace of mind, every flashback arrestor is flame, flow & leak tested after manufacture 5/8 UNF Fittings No welding or cutting shall be performed on an acetylene or oxygen pipeline, including the attachment of hangers or supports, until the line has been purged. It can result in serious injury and equipment damage. All answers to the theory test must be correct. Both devices are recommended for safety, with flashback arrestors mounted at the torch and check valves able to be Aug 4, 2022 · When appropriately used, oxy-fuel welding and cutting equipment is safe, and you don’t need extra protection. Flashback Arrestor Oxy/Fuel Pair Regulator Mount, B 9/16-18 Connections MSC# 09796319 Mfr# H753 0 In Stock In Stock Web Price $128. The equipment used Aug 29, 2023 · Flame Out: How Flashback Arrestors Keep Maritime Gas Welding and Cutting Safe They may be small, but they are mighty. Correct operating procedures (as described in these notes) must be used to cut a piece of mild steel plate. A flashback arrestor can be installed on the torch handle instead of a check valve. Here's how to prevent flashback when welding with oxy acetylene torches. If spitting continues the cylinder should be removed from service, marked or labelled and returned to the supplier. A flame arrestor must be installed directly after the manifold for protection of the cylinders in accordance with EN ISO 14114 and EN ISO Flashback arrestors and check valves serve important but different safety functions in oxy-fuel welding and cutting systems. A FLASHBACK ARRESTOR IS A SAFETY DEVICE USED IN PROCESS GAS SYSTEMS SUCH AS OXYGEN-FUEL WELDING AND CUTTING. Apr 30, 2025 · No. An oxy-acetylene torch flashback arrestor is a safety device that prevents dangerous flashbacks from occurring while using an oxy-acetylene torch. Victor Torches feature: Built-in flashback arrestors and check valves for optimum safety. How do they work? Why is a Flashback dangerous? What are the safety requirements? …& more! The Series 801-7007 and 801-7008 Flashback Arrestor is an economically priced safety device suitable for installation at the inlets of hand or machine oxy-fuel gas torches. Flame or flashback arrestors used in oxy-acetylene equipment setups are a key component of safeguarding the wellbeing of personnel undertaking maritime gas welding and cutting onboard vessels and lowering the risk of damage to assets by preventing flashbacks. Flashback Arrestor - Free download as PDF File (. •They provide protection against flashback and reverse flow of gases to the operator at the torch or equipment point of use. This Safety Article deals with the A flashback is where a gas flame moves ‘upstream’ into hoses, regulators and even gas bottles and cylinders. Specially designed safety devices, called flame traps or “Flashback Arrestors Oct 5, 2023 · They may be small, but they are mighty. DUST FILTER Protect flashback arrestors free from dirt and grease. Operate with any fuel gas for added versatility. Conform to Australian standard AS4603 and independantly certified by Apragaz laboratory in Belgium, Europe. The safety device is to repair by the manu-facturer. SIMPLEX systems for acetylene are delivered with a manual quick acting shut-off valve, which is installed before the pressure regulator. The flashback arrestor is designed to prevent the backflash of a flame through the torch into the hoses and regulator which can cause the torch and hoses to blow up and cause severe injury to the operator. We recommend testing for flow and reverse flow at least once a year (see product instructions for how to test). txt) or view presentation slides online. •Torch and Point of Use flashback arrestors are combination reverse flow check valve and flame barrier in one body. 4. Jul 1, 2020 · This 3 sentence summary provides the key details from the oxy-acetylene inspection checklist document: The document is an inspection checklist for oxy-acetylene equipment that lists 14 criteria to check, including ensuring regulators and cylinders are undamaged, hoses are securely attached and color coded, the cutting torch is functioning properly, and safety accessories like flashback A FLASHBACK ARRESTOR IS A SAFETY DEVICE USED IN PROCESS GAS SYSTEMS SUCH AS OXYGEN-FUEL WELDING AND CUTTING. A flashback arrestor is most commonly used in oxy-fuel welding. Check that the regulators, hoses, and fittings are connected and in good condition. -This means testing at least once per year (with couplings coupled and uncoupled being tested every six months) for gas leaks and gas reverse flow. An Oxy-Acetylene outfit is portable, less expensive and more versatile than a electric welding set up. Nov 23, 2020 · Used properly, modern oxy-fuel process equipment is safe to handle without extra protection. Flashback arrestors are commonly used safety devices that stop or impede the progress of a flame front upstream of the insertion point. Too high flow causes spitting, flame disturbance and reduces the effectiveness of flashback prevention devices. It comprises oxygen and acetylene gases stored under pressure in steel cylinders. It stops the flame from reversing up into the gas cylinders. Reverse Flow Check Valves: Helps to prevent the reverse flow of gases from traveling past the check valve. You can learn to recognize and control these hazards. When was the last time you conducted an inspection? Find out how you can stay compliant. Verify that flashback arrestors are installed on the oxygen and acetylene lines. The pressure disappears over the leak in the atmosphere if the ball valve before and behind the flashback arrestor is closed and system was under pressure . Oct 10, 2010 · To: Those Concerned From: David Pryor Date: November 21, 2008 Subject: The Use of Flashback Arrestors in an Oxy/fuel System This letter is intended to provide an understanding of the use of flashback arrestors in oxy/fuel systems and to provide specific reasons why Thermadyne makes certain recommendations. Flashback Arrestor Assemblies are designed for installation on acetylene cylinders to prevent flashbacks into the cylinder. Confirm that fire extinguishing equipment (e. Flashback arrestors contain a flame barrier that can stop a flashback traveling through hoses and torches, while check valves only prevent reverse gas flow. A flashback arrestor is a reverse flow check valve which also prevents the propagation of a flame upstream. ESAB Flashback Arrestors ESAB has a complete range of independently-certified flashback arrestors which are manufactured in Germany to international standards. 2/C4. Foreword This code of practice on how to manage the risks associated with welding processes in the workplace is an approved code of practice under section 274 of the Work Health and Safety Act 2011 (WHS Act). If used, it is very important that the arrestor be a high flow model, probably regulator mount, and that the appropriate pressure compensation charts are followed. use excessive flow restriction. Flashback arrestors are essential to secure the workplaces and working environment. pdf), Text File (. General requirements Compared to other types of welding and cutting, using oxygen and fuel gas creates unique hazards. Find out how a flashback occurs, and why it is so important to include flashback arrestors as part of your oxy-fuel gas equipment. Welding safety equipment and awareness have flourished for the last several years as manufacturers FLASHBACK ARRESTORS • FLASHBACK ARRESTOR IS NEEDED WHEN MIXING A FUEL GAS WITH OXYGEN OR AIR TO CREATE A FLAME. We have supplied systems for use on continuous casters that supply the torch cutting machines. The flashback arrestors are suitable for most industrial gases and fuel gases such as acetylene, hydrogen, methane, propane, propylene and butane as well as oxygen and compressed air. The document outlines a daily safety inspection checklist for oxy-acetylene equipment, emphasizing the importance of safety measures before operation. The new 8491 Series re-settable flashback arrestors offer 4 safety devices in each unit. Recommended Practices for Oxyfuel Gas Cutting Torch Operation AWS C4. Miller flashback arrestors have a reverse flow check valve and prevent the propagation of a flame up-stream. downstream of gas mixers or a generator to produce hydrogen/oxygen mixture by electrolytic decomposition of water. , fire extinguisher, fire blanket) is readily available in case of emergency. 1 Choice for Flame Arrestors (Flashback Arrestors) certified and under surveillance by The Federal Institute for Materials Research and Testing (German: Bundesanstalt für Materialforschung und -prüfung, or BAM) and OCIMF/RIGHTSHIP compliant. Nov 7, 2022 · With the new RISQ 2. A flashback arrestor or flash arrestor is a special gas safety device most commonly used in oxy-fuel welding and cutting to stop the flame or reverse flow of gas back up into the equipment or supply line and it prevents the user and equipment from damage or explosions. Pressure regulators reduce high cylinder pressures to safer levels while flashback arrestors stop reverse flow and flashbacks - enabling safe use of compressed gases like oxygen and acetylene on ships. Oxy Acetylene Equipment - Free download as PDF File (. Defective hose shall be removed from service. Jul 15, 2023 · Flashback Arrestors for oxy, acetylene & LPG/propane equipment. These models should be used whenever there is a possibility of flammable gas mixing with oxygen or air. Flashback arrestor with BAM testing to the latest international standard is proof that the IBEDA flashback arrestors have undergone independent product testing to fully comply with the highest standards. Oxy-acetylene torches have been used for many years for cutting, welding, brazing, and heating of metals. doc / . Safety devices like flashback arrestors are used. FLASHBACK ARRESTORS - Free download as Word Doc (. 2M:2017 An American National Standard Oxy-Acetylene Cutting Torch Preheat Oxygen Valve Acetylene (GAS) Needle Valve Cutting Oxygen Lever Oxygen (OXY) Needle Valve Note: This is a general representation of an oxy-acetylene cutting torch. Non-return valves fitted to the hoses will detect and stop reverse gas flow preventing an inflammable oxygen and acetylene mixture from forming in the hose. It is recommended that flashback arrestors with adequate (high) flow capacities be used. This will further restrict gas flow and starve the tip. Jul 15, 2025 · Safe storage and handling is critical for keeping and transporting compressed gases. Safety accessories WHaT arE flaSHBaCK arrESTorS Flashback Arrestors prevent reverse flow of gases with built-in check valves and extinguishes flashback fire with a stainless steel sintered how element. We highlight the importance of pressure regulators and flashback arrestors. The document contains a safety inspection checklist for oxy-acetylene cutting and welding torches with 16 items to check regarding employee training, cylinder and equipment condition, pressure levels, storage, and fire safety precautions. Having trained employees to properly select, maintain, and use containers, pressure-reducing regulators, hoses, and Oxy-Acetylene Cutting & Welding Torch Checklist - Free download as PDF File (. Flashback arrestors are mandatory on both the torch and cylinder/regulator ends during gas welding with Dissolved Acetylene and Oxygen to prevent explosions and fire hazards. The average lifespan of a typical Flashback Arrestor is 18 months, depending on average use, by CGA and OSHA requirements for industrial applications. Fuel gas examples include acetylene, methylacetylene-propadiene (MPS), propylene, hydrogen, and gasoline. CONCOA flashback arrestors provide the reliability and safety required in facilities where oxy-fuel welding, heating, and cutting are being performed. And the user and equipment from damage or explosion. The Harris flashback arrestors incorporate a reverse flow check valve and a flame arresting unit in one device. •Torch and Point of Use flashback arrestors are combination reverse flow check valve and flame barrier in one body. Contributing factors The investigation revealed the possible cause of the explosion was related to the fitting of non-tested flashback arrestors. vqd jecr jzjuxs ypkelh bsh iotm enol viydfr eio babug gzxtmc sfgdvu kfszknt ajbu stlwk