MAPP and MAP Pro: the Guide to welding fuel gases
MAPP and MAP Pro are important players in the professional market as key fuel gases for industrial heating and welding applications.
This article will focus on the chemical, performance, application and safety aspects of the two clean-burning fuel gases, aiding operators in understanding and selecting the correct fuel gas. As someone who has spent a large amount of time in the welding industry, I will try to use my practical experience to give you an in depth look at the usability and technical aspects of MAPP and MAP Pro.
Contents
MAPP and MAP Pro: Basics and History of Evolution
MAPP and MAP Pro are two key fuel gas products in today’s welding and metalworking industry. It is necessary to know the basic definition of fuel gas to get these two gases. Gas of fuel a combustible gas of gaseous in normal temperature and pressure containing hydrocarbons, hydrogen, carbon monoxide or combinations thereof.
And you can quickly, cleanly and safely transport those gases over pipelines. Dow Chemical Company developed MAPP gas, erd gas that has mapp usage, and the trademark rights were subsequently acquired by Linde Group. Its name is derived from the RG COC acronym of the main components: methylacetylene, propadiene, and propane. This fuel gas was at first considered a perfect substitute for acetylene because of its greater safety and convenience.
Nevertheless, the original MAPP gas formulation production was discontinued due to its high production costs of about 1.5 times that of propane. This created a market opportunity for MAP Pro. As the successor of MAP Pro, MAP Pro is formulated with less ingredients and more straightforward formulation, which is made up mainly from propylene and propane, and the result of simplified formulation is expected to reduce production cost in addition to maintaining excellent product performance.
The American Welding Society (AWS) reports demand (https://www.aws.org) for this type of high performance fuel gas is increasing in brazing and heating in the HVAC (Heating, Ventilation and Air Conditioning) for piping andother industries.
MAPP gas composition and technical properties
MAPP gas is a hydrocarbon mixture which usually contains around 48% methylacetylene, 23% propadiene, and 27% propane. Such unique formulation gives MAPP gas a number of good technical characteristics.
Physical and Chemical Characteristics
MAPP gas is colorless as a gas and as a liquid. At high concentration, it releases a fishy smell very reminiscent to acetylene, and this is one of features that identifies this gas. Safety: The high concentration of MAPP gas inhaled is poisonous, so make sure it is well ventilated while using.
Burning Characteristic
MAPP gas, when combined with oxygen, has a higher flame temperature than propane but somewhat lower than acetylene. This makes it great for brazing, welding, and heating. The flame temperature generally reaches 2925°C (5300°F), this is the temperature required to meet the metalsworking.
Storage and Transportation Benefits
MAPP gas, on the other hand, does not need to be diluted and filled in special porous filled container for transportation like acetylene. This allows for higher energy fuel can be stored in the same weight of cylinders leading to enhanced transportation efficiency and economy. It is this property that has made MAPP so popular, especially for fieldwork and mobile use. Based on information from the National Institute of Standards and Technology (NIST) (https://www.nist.gov), the high energy density and good combustion efficiency of MAPP gas makes it suitable for welding at medium heat levels.
Composition Determination of MAP Pro Fuel Gas in 3 min by PS-MS
MAP Pro is the next evolution in fuel gas technology and performance. This gas has a simple recipe consisting of about 99.5% propylene and 0.5% propane. This modification in composition not only leads to a reduction in production expenditure, but also enables an improvement in the performance in some applications.
Chemical Properties
MAP Pro is a colorless gas as well, but it smells different from traditional MAPP gas and fainly smells more like “hydrocarbons” rather than fish. The gas is slightly soluble in water, and its highly flammable character must be taken into consideration in use.
Combustion Characteristics
The good combustion of propylene, the major component of the MAP Pro, is well-known. It can be about 3730°F (2054°C), so the flame temperature — although a bit lower than that of the old MAPP stuff — is good for most brazing and heating jobs. Best of all, MAP Pro’s flame and heat distribution are more uniform and the flame is more stable.
What You Can Use It For
MAP Pro is especially beneficial for:
- Brazing Operations: Joining copper pipes, brass fittings, etc.
- Metal Heating Bending, Forming, and Other Heat Treat Processes;
- Pipe Installation: Copper pipe joints in HVAC systems;
- Service and Repair: Fast heating and repair in the field.
The Occupational Safety and Health Administration (OSHA) protocols (www.osha.gov) warn that use of high-performance fuel gases like MAP Pro should be accordance with strict safety measures.
Comparison of MAPP and MAP Pro l Performance”
As someone who’s done a fair bit of welding, I can tell you that MAPP and MAP Pro both have their pros and cons when it comes to actual use: which one you use really depends on what specifically you’re working on.
Differences in Composition
| Properties | MAPP Gas | MAP Pro |
|---|---|---|
| Constituents Major | Methylacetylene (48%), Propylene (23%), Propane (27%) | Propylene (99.5%), Propane (0.5 %) |
| Flame Temperature | Approx. 2054°C | Approx. 2925°C |
| Odor Properties | Fishy odor similar to acetylene | Odor of Hydrocarbons |
| Flammability | Low | Very flammable |
| Production Status | Discontinued | Production Ongoing |
Performance
Based on my hands-on experience, the straight MAPP gas works better for applications that require high heat, especially when working on thick material. But MAP Pro also braze very well with the added value of being continuously available and very competitively priced making it the industry mainstream option now.
Economic considerations
While MAPP gas has a marginally better performance it was expensive to manufacture and was discontinued. Through the technical know-how of the manufacturing process, the formulation of MAP Pro is optimized to provide an excellent cost-performance ratio for a performance sufficient for large-scale commercial use. MAP Pro Market Analysis Analysis of market, industry and competitors from American Gas Association (AGA) (https://www.aga.org) MAP Pro has captured the professional fuel gas market holding that position for many years now in HVAC and piping installation Mogas: part three of my answer series on Moga!
Safe Use and Storage Guidelines for Fuel Gases
With either product, whether it be MAPP or MAP Pro, you should always put safety first! I always stress the importance of following strict safety standards as an industry professional.
Storage Requirements
Temperature Control: Keep fuel gas cylinders in “a cool and well-ventilated place, away from direct light of the sun and heat source”;
Upright Storage: Cylinders have to be stored upright and secured to avoid falling.
Keep Them Separate: Keep oxygen tanks and fuel gas tanks separate, but close enough.
Checks: Inspect regularly, and check for leaks and damage on cylinders and valves.
Usage and Safety
Ventilation Conditions: Only operate in an environment with adequate ventilation to prevent the concentration of gases;
Protection: Use suitable protective clothing, eye protection and gloves;
Flame Control: Learn the right way to light and douse fires;
Dealing with Leaks: In case of a leak, shut off the valve and evacuate.
Health Risks
High concentrations of these fuel gases may cause:
- Dizziness and nausea
- Breathing Difficulty
- Collapse
- Risk of Asphyxiation
Detailed Chemical Safety information in the form of Safety Data Sheets (SDS) is available from the U.S. Centers for Disease Control and Prevention (CDC) at (https://www.cdc.gov), and all users are encouraged to review the pertinent safety information.
Selecting the Best Welding Fuel Gas
With the cessation of the production of MAPP, MAP Pro is the major demand in the market. However, as professionals, we owe it to ourselves to educate ourselves so we can make informed decisions that fit specific needs.
What to Consider When Selecting
1. Operating temperature is a must
Light Brazing (Copper Pipe Connections):MAP Pro is just fine.
Heavy Welding or Cutting If you need to do some heavy welding or cutting, you might want to consider acetylene or some other gas that burns at a high temperature.
2. Working Environment
Indoor Operations: Buy Good Ventilation and Be Safe.
Outdoor Operations: Take Weather and Portability into Consideration.
3. Cost-Effectiveness of Supplies
Frequent Use: MAP Pro is more economical.
Occasional Use: Go for the small, portable cylinders.
4. Availability
With the discontinuation of MAPP gas, MAP Pro is now the default option, with a more stable and dependable supply chain.
Practical Recommendations
In my opinion, and in my experience for many years, MAP Pro is by far the best option for the majority of HVAC technicians, plumbers, and maintenance men. It allows you to have a high enough flame temperature for brazing copper pipe and makes for good safety and economy.
Special gases such as acetylene or the like have to be looked at for special processes requiring higher temperatures. But it’s essential to keep in mind that any fuel gas usage necessitates been on the safe side training and certification.
IIW The International Institute of Welding (IIW) (https://www.iiwelding.org) provides to training solution providers certification programmes to enhance individuals’ professional capabilities and awareness of the safe practice of Welding and Allied Processes.
Conclusion
MAPP and MAP Pro are two significant milestones in fuel gas technology. Though the original MAPP gas is no longer manufactured because the production costs were too high, it established the precedent for superior performance for subsequent fuel gases within the industry. The Isobutane – MAP Pro 144BTF is the next generation and provides a good trade off between performance and price with a stated simplified formulation and is the closest to natural gas option in today’s market.
The main distinction is the chemical composition: MAPP Gas is a mixture of a few gases including methylacetylene, propadiene and propane while MAP Pro is just Propylene and Propane. This leads to variations of flame temperatures, odor profiles, and flammability.
MAP Pro provides adequate performance, reasonable availability, and cost effectiveness for most professional use in modern brazing and welding applications and is the obvious choice for the majority of users. But no matter what fuel gas you select, safety should be your first concern. Safe storage and handling personal protective Equipment— important for accident prevention.
We as industry professionals should always keep abreast of fuel gas technology to ensure we have the latest and greatest knowledge and skill sets to perform safely and efficiently. By differentiating between MAPP and MAP Pro, we are able to choose the best fuel gas for each job and maximize the quality and efficiency of our work.
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