Danny Hayes

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Do you need pancake welding hood and what it’s pros and limitations

The pancake welding hood is a design of a  mask, which in its round shape resembles a pancake (for example - https://wendyspancakes.net/). Right-handed hoods are specifically designed for right-handed people and you can find helmet  for left-handed welder easily too. Thanks to the lightweight design, you can wear welding mask as a pair of goggles with protective shield. If you are looking for a good pancake welding hood, I’ll give you some tips.

Closure Pancake hoods are very popular among pipeline welders, they have good airflow best glare protection and are most lightweight and convenient (review). The balsa block also stabilizes the lens of your helmet perfectly and since you adjust it yourself, there is nothing like comfort. Pancake hoods should be OSHA-approved, but not all are, make sure you purchase a hood from a reputable source, such as Sarge’s, Wendy’s or Original pancake.

It is great if you work when the sun is beaming in the sky, the sealed balsa block provides the best glare-free vision possible. The hood has a very good airflow which is very important when you work in the summer on the south. The pancake welding hood and the balsa block greatly help reduce fatigue by making the process a lot easier for welders. It also accommodates standard lens (electronic lens) and cheater that offer extreme quality optical view.

The most prominent manufacturers of the pancake hoods are Wendy, Sarge and Original Pancake. One of the most reliable pancakes is Wendy’s. They come with adjustable elastic headband and sandpaper for custom-fitting of the eyepiece The Original Pancake brand hood is more flexible and less likely to break than the other brands that use balsa gusset pieces to secure the ear guard

The most pancakes are used by pipeline welders, they make long welds and don’t distract to cleaning, grinding, etc. If you work alone with short joints and need to switch from welding to preparations, you are losing time. The situation is much better if the mask has electronic lens.

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Filtration

Filtration is a separation particles from fluid or gas using filter media - a surface or a depth filter. Aquarium filters are critical components of both freshwater and marine aquaria, they clean the water fish breathe and help keep aquariums looking pristine. Chemistry filters are usually a membrane or layer to physically block certain objects or substances while letting others through. Filtering air is widely used in home air purifiers, engines and compressors to remove dust and debris, pollen, pollution, etc.

Aquarium filters are necessary to support life as aquaria are relatively small, closed volumes of water compared to the natural environment of most fish. The filtering system is one of the most important and sometimes most expensive piece of equipment you need to buy for your aquarium. The most basic and widely used filters that do not do much in the way of mechanical, chemical or biological filtration is the Sponge/air filter. A sponge filter is powered by an air pump where water is forced to pull through the sponge-like material. The sponge is capable of producing biological and mechanical filtration because beneficial bacteria live on the sponge.

Nose filters fit inside the nostrils and eliminates or reduce dust, smoke, foul odors and other pollutants and allergens. All noses are unique, but nose filters comes in highly adaptable shape and in several sizes, so that you definitely find comfortable variant. By using nasal filters, many people have reduced their reliance on medications that may produce unwanted side effects or lessened the risk of a reaction to environmental pollutants.

Forced-air furnace draws air and with the help of a blower fan pushes the heated air into rooms throughout your home. Clogged and dirty air forces the system to work harder than it should, that means higher bills and lower air quality. If you suffer from allergies or asthma, furnace air filters are especially important, besides, furnace filters effectively pick up dirt and dust from being sucked into your furnace, air conditioner, or HVAC unit.

There are two reasons to filter wine: aesthetics and microbial stability. Typical winemaking pore sizes are 5-0.45 micron, the smaller the holes, the “tighter” the filter is. As the wine passes through the filter the larger microbes become stuck and are removed from the wine, 2-micron filters are used to remove yeast, and 0.45-microns are needed to remove bacteria.

Indoor air pollutants are unwanted, sometimes harmful materials in the air and they are among the top five environmental health risks. If outdoor contaminants level is high or weather conditions are not appropriate, air filtering helps to remove pollutants from the air. Air purification systems often use carbon filters that are major combaters of everything from allergens and harsh pollutants to unpleasant tastes and odors. The huge surface area of activated carbon allows it to attach to the surface contaminants and they are trapped. When there is no more surface left to adsorb to the carbon, it is depleted of its capability to be effective.

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Orthotics

Orthotics (Wikipedia link) are devices, specially designed to improve characteristics of the skeletal system. Orthotics often used to guide or limit joint generally assist movement and reduce weight bearing forces. Feet orthoses combine results of anatomy and physiology, biomechanics and engineering studies.

Foot orthotics often used for: - aligning and supporting the ankle; - improving the performance of the foot; - correcting feet deformities.

A wedge inserted into the inner side of the sole of a shoe helps to support a flatfoot, thus reducing the risk of tendinitis. Some of the foot and lower limb problems that can be successfully treated in the long term with orthoses include tendonitis, plantar fasciitis and recurrent stress fractures.

Orthotic devices for foots are inserted into shoes for the foot support, easing pain, redistributing reaction forces and help foot joints while walking, running and standing. You can buy orthotics at sporting goods store to treat various conditions of the ankle and often very effective in relieving common problems with feet pain. Custom orthoses are considerably more expensive than off-the-shelf devices, they are custom-molded and individually designed shoe insert or ankle brace, they last much longer and provide more support or correction.

Absorbing shock as the body's weight shifts and distributing the weight throughout the entire foot is very important feature of the foot. When the arch does not flatten (high arch, or a cavus foot), it. it absorbs shock poorly and instead of spreading the weight throughout the entire foot, it falls only on the heel and the base of the toes. With a cavus foot the weight falls only on the heel and the base of the toes, increasing stress on the foot and up the leg to other joints. To correct this condition, an orthotic is used to adjust and even out the contact between the foot and the ground. Flatfeet cannot maintain a proper arch, over time, the weight of the body on an unstable foot can cause the bones of the foot to become misaligned, it can lead to the development of bunions, hammertoes, and other foot deformities. An orthotic with an increased arch can be prescribed to solve the problem, the heel of the orthotic can be slanted to shift the weight more toward the center of the heel.

Feet orthoses are used by everyone from athletes to the elderly to accommodate biomechanical deformities and a variety of soft tissue conditions. Children with juvenile idiopathic arthritis showed significant improvement in overall pain, speed of ambulation and daily functional ability when using orthotics. Foot orthoses may also be used in conjunction with properly fitted orthopaedic footwear in the prevention of foot ulcers in the at-risk diabetic foot.

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Water filtration systems

Anything other than water molecules is defined by law as “contaminant” (EPA) Some of them are are harmful, while others are harmless.

Drinking water always has some amount of contaminants, they does not necessarily indicate that the water poses a health risk, but they may be harmful if consumed at certain levels (Safe Drinking Water Act). The following are general water contaminants types are: - Physical contaminants impact the physical appearance of drinking water: sediment from soil erosion in river water, organic particles, etc. - Most known chemical contaminants are man-made, but in addition to pesticides, salts and metals they also includes toxins produced by bacteria. - Biological contaminants water organisms, microbes and viruses. - Chemical elements with unstable atoms emit ionizing radiation are called radiological contaminants: radon, plutonium, uranium, and so on.

It is easy to see, why the systems that include the capability to filter chemical impurities, remove bacteria and viruses, prevent scale build-up are so popular. Water filtering and purification make the water cleaner and healthier, reduces chemical impurities, bacteria and viruses amount and even prevent scale build-up in your appliances.

Colorless, clear, and odorless water may not have the right quality. For water from an unknown source filtering with activated carbon filter or boiling may be not sufficient for treating all the possible contaminants. Natural spring water – considered safe in the 19th century, but now you need to test it.

By most definitions, water purification means that water is free from bacterial contaminants and viruses. However, they do not purify water from sediment, chemical contaminants, etc. Purification systems are often used after filtration – water filters remove unwanted chemical components whereas purification effectively removes bacteria and viruses.

Household water filters help to remove or reduce chlorines, heavy metals, hydrogen sulfide and so on. They also inhibit further development of microorganisms, but usually you nee to use additional units to ensure the removal of bacteria and viruses. Sub-Micron Post-Filter and ultraviolet unit effectively are effective in reducing bacteria and viruses that are present in some water supplies.

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Welding Processes

There are many ways to link the parts together. The most usual are fastening by bolts or rivets, brazing and welding. If you need to do the solid joint on long parts of joining surfaces you need welding. This advantage of welding used to make boilers or other enclosed cans.

The fusion technique was developed when mankind discovered the iron forging. People heated small pieces of iron to welding temperature and then hammered or pressed them to create larger useful pieces. The most common today’s welding techniques are arc welding, oxyacetylene welding, resistance, electron-beam, friction, laser welding and other. The shielded metal-arc welding is the most used technique. In this process, an electric arc is used to melt the electrode’s metal and transfer it to the joint. Another technique is gas (usually oxyacetylene) welding. The source of heat in this process is acetylene burned in the atmosphere of oxygen. For the resistance welding, the main source of heat is the electrical resistance of the joint. This welding technique is made by using high-current and low-voltage power sources with pressure added to the joint. Electron-beam welding is based on a dense stream of high-velocity electrons bombarding the joint. If you use the friction of moving parts, this is called the friction welding. Laser welding is accomplished when materials are fused together by heat generated from a laser source.

The quality of weld depends on the base material, filler and flux material, energy and design. The welding method and concentration of energy input, weldability of the base material and type of the filler and flux influence the strength of weld and material. The weld quality also much depends on the heat-affected zone. To test the quality of the weld either destructive or nondestructive methods are used. Gas and non-metallic inclusions, cracks, incomplete penetration, distortions, lack of fusion and lamellar tearing are common defects of welds.

There are different ways the parts can be geometrically prepared for welding. The basic types of weld joints are the butt joint, V-butt joint, lap joint and T-joint. Other variations exist as well. Many welding processes require the particular joint design. Resistance, laser, and electron-beam welding are most frequently performed on the lap joints.

Carbon and low-alloy steels are the most frequently used materials in welded constructions. The amount of carbon or alloying content influences the weldability of steels widely. Another good weldable material is Aluminium and its alloys. Copper and its alloys are also weldable, but the high thermal conductivity makes welding difficult. As a rule, you can easily weld plastic or glass. The most common technique to weld them is heating to melting range and adding pressure on surfaces.

A proper weld joint can be prevented by dirt, rust, grease, and oxidation. To protect hot metal from these there are two protection methods used in all weld processes: flux or shielding gas. Welding flux is used in solid, paste or liquid form. When evaporated, it creates a small pocket of gas. This prevents oxidation. But solid flux must be removed after completing the welding. To protect welding shielding gas surrounds point of welding.

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Nice to see you!

My name is Danny, I’m originally from Duluth, and I am a mechanical designer.

I have repaired many different stuff and I have learned mechanical engineering hands-on in a technique that varsities do not afford. Now, when I’ve got much practice, I became a part of the supportive fellowship that I can rely on, a ensemble of friends that I will foster my growth as a person and as an engineer.

I've made the tech blog and look forward to providing help and share my experience with the enthusiasts in welding and constructing. Thereby, don’t hesitate to ask me any question, share your experience and even criticize me – I’m ready to have new experience and learn new things