Blog posts of '2025' 'July'

When it comes to cutting, brazing, and heating metals in a welding shop, choosing the right fuel gas can make a significant difference in cost, efficiency, and safety. The two most common choices in Central Texas are propane and acetylene, each offering its own strengths and limitations. At Dupuy Oxygen in Waco, we frequently help customers decide between these two fuels based on their specific applications and goals. In this guide, we’ll explore the key differences between propane and acetylene, compare their performance, and help you determine which one is best suited for your needs.

Understanding the Basics of Fuel Gases

Both propane and acetylene are combustible gases used in conjunction with oxygen in oxy-fuel torches. When combined with oxygen, these gases produce a flame hot enough to cut or weld metals. However, they differ in chemical makeup, flame characteristics, operating temperatures, and application-specific performance. Choosing the right one depends on what you’re doing—cutting steel, preheating parts, brazing, or performing general metalwork—and your priorities around cost, speed, portability, and safety.

Flame Temperature and Cutting Performance

One of the most important factors to compare is flame temperature. Acetylene produces the hottest flame of any fuel gas—reaching approximately 6,000°F (3,300°C) in oxy-acetylene torches. This intense, focused heat makes acetylene the preferred choice for welding, cutting thick steel, and applications requiring pinpoint flame control. In contrast, propane produces a maximum flame temperature of around 5,200°F (2,870°C) in an oxy-propane torch. While cooler than acetylene, propane delivers a broader, less focused flame that’s better suited for heating large areas and cutting thinner materials. Because of its lower temperature, propane is not suitable for welding steel but works well for cutting and heating.

Preheat Time and Piercing Speed

Acetylene’s higher temperature translates to faster preheat times and quicker piercing when cutting thick metal. This efficiency can save time on the job and improve productivity in fabrication environments. Propane takes longer to preheat the metal before initiating the cut, especially with thicker plate steel. However, once the cut is started, propane’s broad flame offers consistent cutting speeds and a clean kerf when paired with the correct torch tips.

Gas Cost and Cylinder Availability

One of the biggest advantages of propane is its cost. Propane is widely available, often cheaper than acetylene, and can be purchased in various tank sizes—even at retail hardware stores. In contrast, acetylene is more expensive due to its specialized production process and storage requirements. If you’re working with a limited budget or performing high-volume cutting and heating tasks, propane’s affordability can lead to substantial long-term savings. At Dupuy Oxygen, we offer flexible gas cylinder rentals and refills for both propane and acetylene to help you manage costs efficiently.

Torch Equipment Compatibility

While both gases can be used in standard oxy-fuel torches, they require different tips and settings for optimal performance. Acetylene uses one-piece cutting tips that allow precise flame control and higher heat concentration. Propane, on the other hand, requires a two-piece cutting tip designed to optimize its broader, cooler flame. It’s important not to interchange tips, as doing so can result in poor performance and increased safety risks. Additionally, ensure that your regulators, flashback arrestors, and hoses are compatible with the fuel gas you're using. Dupuy Oxygen carries a full range of torch equipment and can help you choose the right components for either fuel.

Safety Considerations

Acetylene is highly flammable and unstable at pressures above 15 psi. It requires specific storage and handling procedures, including upright cylinder positioning and adequate ventilation. If exposed to heat or flame in a closed environment, acetylene can decompose explosively. Propane, while still flammable, is considered more stable and easier to store safely. It has a higher vapor pressure and can be stored in liquid form under pressure without the same instability concerns. However, propane is heavier than air and can accumulate in low-lying areas, creating fire or explosion hazards in enclosed spaces. Regardless of the fuel you choose, always follow proper handling, leak detection, and ventilation procedures to keep your team safe.

Environmental Impact and Burn Residue

Acetylene burns with a sooty flame when used without oxygen, which can leave carbon deposits on surfaces and tools. This may not be an issue for rough cutting or heavy fabrication, but it’s something to consider in environments where cleanliness matters. Propane burns cleaner and produces less soot, making it a better choice for some food service, HVAC, or clean workspace applications. Additionally, propane tends to produce less overall exhaust gas, which can be an advantage in confined areas when paired with proper ventilation.

Best Applications for Acetylene

Acetylene is ideal when the job demands high heat, speed, and precision. Typical applications include:

• Gas welding of steel or ferrous metals
• Cutting thick plate steel quickly
• Brazing and silver soldering
• Heating for bending or forging tasks
• Automotive and industrial fabrication

Because acetylene provides better control and faster cutting performance, it’s a top choice for structural welders, repair shops, and heavy fabrication professionals.

Best Applications for Propane

Propane is the better choice when cost-efficiency, safety, and broad heating coverage are priorities. It excels in:

• Cutting mild steel up to moderate thickness
• Preheating large surfaces or components
• Heating for shrink fitting or torch-applied coatings
• HVAC brazing or soldering (with suitable tips)
• Outdoor or job-site work requiring portability

Propane is especially popular in scrapyards, maintenance shops, and agricultural environments due to its affordability and ease of use.

Which Fuel Gas Is Right for You?

Choosing between propane and acetylene comes down to your specific use case and operating priorities. If you require high heat, precision, and the ability to weld, acetylene is likely your best option—despite the higher cost. If you're focused on heating, cutting, and general fabrication with an eye on cost savings and safety, propane may be the better fit. Some shops even use both fuels for different applications, switching based on task requirements. Dupuy Oxygen can help you evaluate your needs and select the right fuel gas, torch system, and accessories for your work.

Let Dupuy Oxygen Help You Make the Right Choice

Whether you're outfitting a new welding shop, upgrading your cutting torch, or trying to optimize gas costs, Dupuy Oxygen in Waco has the experience and inventory to support your operation. We carry both propane and acetylene cylinders, torch tips, regulators, hoses, and safety equipment. Our team of experts can answer your questions, provide demos, and ensure you're using your gas setup safely and efficiently.

Contact us today or stop by our Waco location to get professional advice on choosing the right fuel gas for your welding and cutting projects.

Launching a new welding shop is an exciting opportunity whether you’re starting a business from scratch or expanding your fabrication capabilities. But setting up a successful shop takes more than just a few welders and some metal—it requires strategic planning, the right equipment, proper safety protocols, and a reliable gas and supply partner. At Dupuy Oxygen in Waco, Texas, we’ve helped countless welders across Central Texas get started with the tools and knowledge they need. In this guide, we’ll break down everything you need to set up your welding shop, from essential tools to safety requirements and ongoing support.

Choose the Right Location and Layout

Before you purchase equipment or start welding, it's crucial to choose the right location and layout. Look for a space with high ceilings, adequate square footage, and proper ventilation. You’ll need designated zones for welding, cutting, grinding, storage, and office or administrative tasks. Your welding shop should have access to 220V electrical outlets, reinforced concrete floors, and an area where gas cylinders can be stored securely and upright. If possible, layout your workstations to allow smooth movement of materials and projects between fabrication, welding, and finishing areas. Good lighting and adequate ventilation—whether through exhaust fans, fume extractors, or natural airflow—are non-negotiable for safety and comfort.

Essential Welding Machines and Power Tools

A welding shop without welding machines won’t get far. The core of your operation will revolve around the types of welding you plan to offer. At minimum, most shops benefit from having at least one of each of the following:

• MIG Welder: Ideal for high-speed fabrication and working with mild steel, MIG welding is a go-to for many general-purpose shops. These machines are relatively easy to use and work well for thick materials and larger assemblies.
• TIG Welder: For more precision or working with aluminum and stainless steel, a TIG welder offers clean, controlled welds. TIG welding is common in aerospace, automotive, and artistic metalworking.
• Stick Welder (SMAW): Stick welding is perfect for outdoor or structural work and can be done with minimal shielding gas setup. It’s less clean but incredibly versatile and effective for rough environments.
• Plasma Cutter: You’ll need a way to cut metal cleanly and quickly, and a plasma cutter gives you the speed and flexibility to handle a variety of thicknesses and metals with minimal cleanup.
• Angle Grinder: For prepping joints, cleaning welds, and shaping metal, a quality grinder is an indispensable tool in your workflow.
• Bench Vise and Workbenches: A heavy-duty vise and strong, steel-topped workbenches will keep materials steady while welding, cutting, and assembling.
• Clamps, Squares, and Layout Tools: Accuracy is everything in fabrication. Stock up on magnetic squares, clamps of all sizes, tape measures, and scribes.

Compressed Gas Supply and Storage

You can’t run a welding shop without a steady supply of gases like oxygen, acetylene, argon, or CO₂ depending on your welding processes. Partnering with a trusted gas supplier like Dupuy Oxygen ensures you have safe, timely, and cost-effective access to the gases you need. Decide early on how many cylinders you’ll need on hand and plan for safe storage. All cylinders must be stored upright, secured with chains or brackets, and separated by gas type. You’ll also need regulators, flashback arrestors, and high-quality hoses that match the pressure ratings of your gases.

Welding Accessories and Consumables

Once your main machines are in place, you’ll need consumables and accessories to get to work. These include:

• Welding wire and filler rods (choose based on your metal type and welding process)
• Tungsten electrodes for TIG welding
• Contact tips and nozzles for MIG
• Welding rods for stick welding
• Shielding gas and tank refills
• Ground clamps and leads
  
  

Stock up on backups and keep a supply inventory system in place to prevent downtime.

Ventilation and Fume Extraction

Welding produces fumes and particulates that can pose long-term health risks. Proper ventilation is required by OSHA standards and should be a top priority from day one. This includes:

• Local exhaust ventilation (LEV) systems near welding stations
• Fume extraction arms for TIG and MIG applications
• General ventilation systems or overhead exhaust fans
• Air purification systems in enclosed spaces
  
  

Dupuy Oxygen offers recommendations on ventilation setups that comply with safety standards and improve shop air quality.

Welding Safety Equipment

Safety is a critical part of your welding shop setup. Without it, you risk injury, equipment damage, or regulatory fines. Here’s a checklist of safety gear every shop needs:

• Auto-darkening welding helmets
• Welding jackets, gloves, and aprons
• Flame-resistant shop clothing
• Welding curtains or screens for shared spaces
• Fire extinguishers (Class D for metal fires)
• First aid kit
• Proper signage (flammable gases, PPE zones, exit routes)
• Safety Data Sheets (SDS) for all gases and chemicals on-site

Provide every welder with proper PPE and conduct regular safety training sessions.

Electrical and Utility Setup

Ensure your shop has the proper electrical infrastructure to support your welding machines and lighting. You’ll likely need:

• 220V outlets for high-amperage welder
• Circuit breakers and disconnects for each machine
• Grounding rods and cables
• Lighting over workstations
• Compressed air lines for pneumatic tools and cooling

Consult with a licensed electrician to ensure your shop meets all local codes and is future-proof for expansion.

Inventory, Material Storage, and Workflow

Set up dedicated areas for storing raw materials such as sheet metal, tubing, and stock. Use labeled racks to prevent mix-ups and optimize your space. Create a workflow that moves materials from storage to prep to welding and finally to finishing or shipping. Label everything clearly and implement a system for job tracking to stay on schedule.

Hiring and Training Your Team

Even the best-equipped shop won’t succeed without skilled welders. Hire experienced fabricators and provide training on shop-specific procedures, safety practices, and equipment use. Encourage certifications through AWS (American Welding Society) or other recognized programs. When everyone in the shop knows what to do and how to do it safely, you’ll reduce mistakes, boost output, and improve your reputation.

Partnering With a Local Supplier for Long-Term Success

Having a local, responsive supplier makes all the difference when running a welding shop. Dupuy Oxygen in Waco is more than just a gas supplier—we’re your partner in safety, productivity, and growth. We provide high-quality welding gases, equipment rentals, safety gear, and on-site support to ensure your shop runs smoothly from day one. Our delivery services keep you stocked, and our experienced team is here to answer your questions and offer advice on everything from torch selection to cylinder safety.

Let Dupuy Oxygen Help You Build Your Shop Right

Setting up a welding shop can be overwhelming, but with the right plan and the right partner, it doesn’t have to be. At Dupuy Oxygen, we’re proud to help welders across Central Texas get started the right way—with expert advice, top-notch products, and unmatched customer support. Whether you're a one-person operation or a growing team, we’ll help you build a safe, productive, and profitable shop.

Visit us in Waco or contact Dupuy Oxygen today to get started on your new welding shop setup.

Compressed gases are essential to a wide range of industries in Central Texas—from welding and metal fabrication to medical facilities, laboratories, and food services. While these gases play a vital role in daily operations, they also pose serious safety risks if not handled properly. At Dupuy Oxygen in Waco, we prioritize not only supplying high-quality gases but also helping our customers maintain safe practices. In this blog, we’ll walk you through the top five mistakes people make when handling compressed gas cylinders and how to avoid them to keep your workplace safe, compliant, and efficient.

Mistake #1: Improper Storage of Gas Cylinders

One of the most common and dangerous mistakes is improper storage. Compressed gas cylinders contain high-pressure contents that can become explosive under the right conditions. Leaving them unsecured, exposed to heat sources, or stored improperly can lead to severe accidents. Cylinders should always be stored upright with protective caps in place when not in use. Use secure cylinder racks or chains to prevent tipping. Keep oxygen cylinders at least 20 feet away from flammable gases or separate them with a non-combustible barrier. Store all cylinders in a cool, dry, well-ventilated area away from direct sunlight, open flames, electrical panels, or corrosive chemicals. Labels must be visible, and cylinders should be grouped by gas type to avoid dangerous mixing.

Mistake #2: Using Damaged or Worn Equipment

Using regulators, hoses, or torches that are damaged or worn is a serious safety risk. Over time, fittings and seals can degrade, hoses can crack, and connections can become loose. Even a minor leak can create flammable or toxic environments, especially when working in enclosed spaces. Before each use, inspect all equipment for signs of wear or damage. Check regulators for signs of corrosion or leakage, and test hoses for flexibility and cracks. Make sure all connections are tight and leak-free. Never use oil or grease on oxygen fittings—it can react violently with pure oxygen and cause explosions. Replace damaged parts immediately and perform routine maintenance to extend the life of your equipment.

Mistake #3: Mishandling Cylinders During Transport

Transporting compressed gas cylinders is another area where many users make critical mistakes. Whether you’re moving cylinders across your facility or transporting them off-site, it’s vital to follow proper procedures. Never drag, roll, or slide a cylinder—always use a cylinder cart or dolly specifically designed for gas transport. Cylinders must remain upright and secured during transport to prevent tipping. Do not lift cylinders by their valve or cap. Instead, use appropriate lifting devices if needed. During vehicle transport, secure cylinders to prevent movement and never leave them in a hot vehicle, as temperature increases can raise internal pressure and risk rupture. Valve protection caps should be installed when cylinders are moved, and only trained personnel should be involved in loading and unloading operations.

Mistake #4: Ignoring Gas Identification and Labeling

One of the most preventable hazards is using or storing a cylinder without knowing what’s inside. All compressed gas cylinders must have a legible, durable label identifying the contents. Relying on color coding or guessing based on previous use is a dangerous gamble—labeling standards vary by manufacturer and country, and a mix-up can result in chemical reactions, fire, or exposure to toxic gases. Always read the label before connecting or using a cylinder. Never use a cylinder with missing or unclear markings. Labels should include the gas name, hazard classification, and handling precautions. Maintain updated SDS (Safety Data Sheets) for all gases used in your facility and train staff to recognize the hazards associated with each gas type.

Mistake #5: Inadequate Training and Safety Procedures

Perhaps the most significant mistake is not ensuring proper training and procedural enforcement among staff. Handling compressed gases requires a fundamental understanding of pressure systems, chemical properties, and emergency response. Untrained personnel may unknowingly bypass safety protocols, increasing the likelihood of accidents or long-term exposure risks. Employers should provide comprehensive training for all employees who interact with compressed gases, including safe handling, equipment inspection, storage procedures, emergency shutdown, and leak detection. Regular refresher courses and safety audits help reinforce best practices. In addition, every facility should have clearly posted safety signage, well-maintained PPE (Personal Protective Equipment), and an accessible emergency response plan tailored to gas-related incidents.

Bonus Mistake: Failing to Monitor Cylinder Usage and Inventory

While not in the top five, one mistake many businesses make is failing to track gas usage and cylinder inventory. This can lead to expired certification dates, unexpected shortages, or unsafe stockpiles. Implement a tracking system to monitor when cylinders are received, used, refilled, or returned. Rotate stock properly and ensure that cylinders with expired hydrostatic test dates are taken out of service. At Dupuy Oxygen, we help our clients manage gas inventory efficiently so they can focus on their work with peace of mind.

Best Practices for Safe Compressed Gas Handling

To avoid these mistakes, follow these best practices in your facility:

• Secure cylinders upright with chains or racks at all times.
  
  

• Perform daily visual inspections on cylinders, valves, hoses, and regulators.
  
  

• Keep oxygen and flammable gases stored separately with proper signage.
  
  

• Always transport cylinders using approved carts with caps in place.
  
  

• Use only equipment rated for the type and pressure of gas you're handling.
  
  

• Train all employees in proper handling, emergency procedures, and PPE usage.
  
  

• Keep gas usage logs, update inventory records, and manage expirations.
  
  

Common Gases and Their Risks

Different gases come with different hazards. Understanding the specific risks associated with the gases you use is key to safe handling:

• Oxygen (O₂): Not flammable, but greatly accelerates combustion. Never store near flammable materials.
  
  

• Acetylene (C₂H₂): Highly flammable and unstable above certain pressures. Always store upright.
  
  

• Argon (Ar): An inert gas that can displace oxygen in confined spaces. Ensure proper ventilation.
  
  

• CO₂ (Carbon Dioxide): Can cause asphyxiation in high concentrations. Monitor enclosed environments.
  
  

• Nitrogen (N₂): Odorless and inert, but can displace breathable air in confined spaces.
  
  

Dupuy Oxygen: Your Trusted Gas Safety Partner in Central Texas

For decades, Dupuy Oxygen has supplied compressed gases, cylinders, regulators, and safety equipment to businesses across Waco and the surrounding region. We don’t just deliver gas—we help you stay safe, compliant, and productive. Our team is available to provide on-site safety consultations, product recommendations, and customized solutions for your industry. Whether you need industrial, medical, or specialty gases, we’ve got the expertise and inventory to meet your needs.

Let us help you minimize risk and optimize your gas handling procedures. Contact Dupuy Oxygen today for professional guidance, quality supplies, and reliable service you can count on.

Choosing the right welding torch is one of the most important decisions you’ll make when starting a welding project. Whether you're fabricating a custom metal structure, performing repairs, or managing a commercial welding operation, your torch directly affects the quality, safety, and efficiency of your work. At Dupuy Oxygen, serving Waco and Central Texas, we help welders make informed decisions by offering a wide selection of quality torches, accessories, and expert guidance. In this blog, we’ll break down the major types of welding torches, their applications, and the key factors to consider when choosing the right one for your job.

Understanding the Basics of Welding Torches

A welding torch is a handheld device used to direct heat onto a workpiece, melting metals together during the welding process. The torch typically consists of a handle, gas valves, a mixing chamber, and a nozzle or tip. Some torches use a flame created by combusting gases (such as oxy-acetylene), while others conduct electricity to create an arc (as in MIG or TIG welding). The type of torch you need depends on your process, materials, and project goals.

The Three Main Types of Welding Torches

There are three primary categories of welding torches, each suited for different welding processes:

MIG Welding Torch (Gas Metal Arc Welding – GMAW): MIG torches are used in wire-feed welding, where a continuous solid wire electrode is fed through the torch and into the weld pool. These torches are ideal for high-speed welding and are commonly used in automotive, fabrication, and industrial settings. MIG torches come in air-cooled or water-cooled variants, with trigger controls for easy operation. They require shielding gas (typically argon or a mix of argon and CO₂) to protect the weld from contamination.

TIG Welding Torch (Gas Tungsten Arc Welding – GTAW): TIG torches are used for precise, high-quality welds. Unlike MIG welding, TIG requires manual feeding of the filler rod while using a non-consumable tungsten electrode. TIG torches are favored for stainless steel, aluminum, and other non-ferrous metals, and offer exceptional control over heat and arc stability. TIG torches are lightweight and often feature flexible heads and ergonomic grips, making them perfect for intricate work and thin-gauge materials.

Oxy-Fuel Welding Torch (Oxy-Acetylene): Oxy-fuel torches mix oxygen and a fuel gas (usually acetylene) to create a high-temperature flame for welding, brazing, or cutting. These torches are widely used in metalworking, plumbing, and farm equipment repair. While not as common for structural welding today, they remain a reliable tool for specific applications where electricity is not practical.

Factors to Consider When Choosing a Welding Torch

Not every torch is right for every job. Here are the key factors to keep in mind when selecting a welding torch:

1. Welding Process: The first and most obvious factor is the welding process you're using—MIG, TIG, or oxy-fuel. Each requires a torch designed specifically for that process, and using the wrong torch can compromise performance and safety.

2. Type of Metal: The metal you’re welding plays a big role in torch selection. For example, TIG is preferred for aluminum and stainless steel because of its precision and clean welds. MIG is better suited for mild steel and thicker materials. Oxy-fuel is effective on ferrous metals and is commonly used for cutting or brazing rather than modern welding tasks.

3. Material Thickness: Thicker materials require higher amperage and more robust torches. MIG torches are generally more capable of handling heavy-duty applications, while TIG torches are ideal for thinner, more delicate work. If you’re cutting thick plate steel, an oxy-acetylene torch might be your best bet.

4. Power Requirements: Welding torches are rated for certain amperage ranges. Using a torch rated too low for your welder or job can result in overheating or equipment failure. Make sure your torch is compatible with your welding machine and rated for the amperage you’ll be running.

5. Cooling System: High-amperage torches may require water cooling to prevent overheating. Water-cooled torches are more expensive and complex but offer better durability and comfort during prolonged welding sessions. Air-cooled torches are simpler and cost-effective for lighter-duty work.

6. Torch Ergonomics: Comfort matters, especially for long jobs. Consider the weight, grip, trigger placement, and flexibility of the torch. A well-balanced torch with good maneuverability can help reduce fatigue and improve precision.

7. Duty Cycle: The duty cycle of a torch indicates how long it can operate within a 10-minute window before overheating. If you're welding continuously for long periods, invest in a torch with a higher duty cycle to avoid downtime and ensure consistent performance.

8. Budget and Maintenance: Your budget will also affect your choice. TIG torches, especially water-cooled versions, tend to cost more upfront. However, they provide more control and cleaner welds. Additionally, factor in the cost and availability of consumables like tips, nozzles, and collets, as well as ease of maintenance and part replacement.

Choosing the Right Brand and Model

Reputable brands like Miller, Lincoln Electric, ESAB, Victor, and Harris offer torches known for reliability and ease of service. At Dupuy Oxygen, we carry top-tier torches and can help you compare models based on your specific needs. Whether you need a compact torch for occasional hobby use or a heavy-duty model for industrial welding, we’ll help you choose the right setup.

Essential Accessories to Pair with Your Torch

Choosing the right torch also means selecting the right accessories. Here are a few essentials:

• Contact Tips and Nozzles: These wear over time and need regular replacement. Choose the right size for your wire diameter and amperage.
  
  

• Electrodes and Collets: For TIG welding, the correct tungsten type and collet size are vital for arc stability and performance.
  
  

• Regulators and Hoses: For oxy-fuel setups, ensure you have high-quality regulators and flashback arrestors to prevent accidents.
  
  

• Protective Gear: Never weld without proper PPE. Use welding gloves, auto-darkening helmets, flame-resistant clothing, and ventilation systems to protect yourself from heat, sparks, and fumes.
  
  

Welding Torch Safety Tips

Safety should always be a priority. Here are a few torch safety reminders:

• Always inspect torches, hoses, and connections for leaks or damage before use.
  
  

• Never use damaged or worn parts—replace them immediately.
  
  

• Store cylinders upright and secure them properly.
  
  

• Bleed gas lines when shutting down oxy-fuel systems.
  
  

• Use appropriate shielding gas for MIG/TIG welding and ensure proper ventilation.
  
  

Let Dupuy Oxygen Help You Choose the Perfect Torch

Welders across Waco and Central Texas trust Dupuy Oxygen for expert advice, high-quality welding equipment, and dependable service. Whether you’re a seasoned fabricator or new to the trade, we’re here to help you find the best torch for your needs and budget. Our team will walk you through all the options and make sure you leave with the right gear for the job.

Stop by our Waco location or contact us today to speak with a welding specialist and explore our full range of torches and accessories.