Choose the Best Welding Service for your Project

Choosing the best welding service is vital to the success of any welding project. One has to match the equipment to the requirement of the job. Many welding companies specialize in specific types of welding and one has to conduct some research work online to find the most suitable one. Look for the following when selecting a welding contractor:

 Source of Image: Pixabay

Check the Client List
Every manufactured items of use that is made of metal or uses metal components or wires needs welding. From aircrafts to cars to PCBs all need welding. When you look online you can find companies that have been welding for big brand names such as Hughes aircraft as well. Leading brands look for a high level of skill and attention to detail besides the latest equipments. Checking their client list online will give you an idea about their market standing. If you find popular brand names on their client list then give them a call. 

Ensure They have Worked on Similar Projects
The well-established companies hire the more talented technicians that are able to manage large projects. They possess the uncommon set of skills required to complete the project with precision. Cost is not the first concern when it comes to welding. It is advisable to look for a contractor that has the experience with projects like yours. 

Consider the Type of Material
Consider the type of material that needs to be welded and look for a company that has been working with these materials for at least a few decades. Welding materials include steel, stainless steel, aluminum, brass, copper, Inconel alloys, nickel alloys, and so forth. If you want welding for aircrafts you have to find a contractor that is good with aluminum welding. It is difficult to weld aluminum pieces together. A professional company has all the modern equipment and has the talented staff to take care of your welding projects. 

Project Evaluations and Technical Advice
You can get project evaluations and free technical advice to move your project forward. Free test welds allow you to choose the right equipment for the job. For an estimate you will have to go over to their location to discuss the project details and get the assistance you need. Call and ask the company if they can give you free technical advice as this will help you in many ways. 
Leading Service Providers Offer Equipment and Electrodes
Some welding contractors also offer equipment such as micro, small, and large spot welding machines and electrodes, besides ACF bonding and hot-bar soldering equipment. They also provide wire EDM and CNC machining services. For their clients they import the latest equipment from Japan and sell it online. You can find all types of electrodes at their website and if you need custom electrodes, they can make it for you within your budget. With experience comes market knowledge and hiring such a company will give you peace of mind knowing your projects are being taken care of by a reliable contractor. 

Check Services They Offer
The best service providers offer a host of welding services including 5 axis CNC lathes, CNC mills, wire EDM, ram EDM, surface grinding, laser welding, anodizing, and much more. It is viable to get ACF bonding, CNC machining services, battery tab welder, resistance welding equipment and electrodes from a leading service provider.
Some CNC machining service providers help with product design. Use their expertise to refine your designs. They will make a prototype and after your approval it will be mass produced. Their manufacturing experience will help eliminate unnecessary and costly features of your product.

About Author

Donald Ernest has a Masters degree in Mechanical Engineering. He has worked on welding projects for 20+ years and likes writing on welding equipment and services.
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Auto Darkening Welding Helmet Reviews and Buyer Guide

If you are struggling with an old helmet for some time now and still unable to see clearly what exactly you are doing is just because the field of view is so small. Don’t wait to replace it as switching to a new helmet may entirely change your welding experience. It makes no difference whether you are working in a shop or a home welder to make repair welds on you own car, motorbike, van or gate, you just need a right equipment to get your job done with ease and comfort, isn’t it. Not with standing years of experience, an expert welder with weary eyes and brain can make mistakes with the use of faulty equipment. In such critical conditions, you need appropriate equipment that not only facilitate but also guide you, to perform job more precisely in a way that fits well within time, need and requirements.

Best Welding Helmets

What exactly a welding helmet is?
A welding helmet is very important personal protective equipment which protects user from intense arc light and sparks. A complete protection of face from sparks, eyes from ultraviolet & infrared radiations and respiration from hazardous gases is what makes welding helmet an ideal protective equipment. Although above stated hazards are bitter pill to swallow but everyone has to be cautious to make one alive and kicking isn’t it. So if you want to feel on the top of the world make a right choice for a helmet that can be a great fit for you. 

Features to look for
When you are going to buy a welding helmet, a lot of queries flip through your mind about which one will be a best fit for you. Especially when there is a great deal of variety available in products, it’s really hard to make final decision. Following is the list of some key things that must be kept in mind before making the selection of best welding helmet.
  1. What size of lens or viewing area is required?
  2. Does it provide adequate protection against ultraviolet and infrared radiation?
  3. Does its build quality and shape provide adequate protection for your face?
  4. Is the helmet material durable? (E-g. high impact Polyamide Nylon is preferable)
  5. Does it include a storage case?
  6. Is it light in weight? – Does it lie in a range that will make you feel comfortable and you don’t notice that you’re wearing it.
  7. Does it include battery?
  8. Is battery replaceable and easily available in market when it finally gives out?
  9. Battery Quality and average life
  10. Does it meet required safety standards?
  11. Does it work with ‘automatic switch off’ function?  
Comparison between Auto darkening and conventional helmets

a. Variable Shade Lens
Using a common helmet, may not provide complete protection to your eyes, especially when you work with different weld processes (like TIG, MIG, SMAW etc.) and make welds on different steel grades with different thicknesses. In this case you have to deal with varying brightness of arc which can be best adjusted with an auto-darkening helmet. You can adjust lens shades accordingly when you’re going to work with high amperage or on a specific job that gives off extremely bright arc, making an irritation to your eye.

b. Lens Switch Speed
The faster a lens switches to darkened shade; the better is your eye protection against highly intense light. Today helmets are available at different prices with varying switching speed. So if you spend more time on work you need to spend more money for a faster lens, in order to provide alleviation to eyes.  

c. Light weight
An auto-darkening helmet is also light in weight as compared to traditional helmets; that’s really icing on the cake. Using a light weight helmet will make you feel less tired and lethargic by the end of day. People who spend more time on work they must go for lighter one in order to alleviate exhaustion resulting from work exertion.

d. Sensitivity Control
Sensitivity control is another beneficial feature of an auto-darkening helmet which helps you to work easily with lower amperage welding process such as TIG (Tungsten Inert gas welding). This feature provides adjustments to the darkening of lens accordingly to the specific brightness of arc.

e. Darkening Delay Feature
This feature includes delaying of lens darkening stage after the arc extinguishes. A welder can adjust the short or long delay time appropriately to the particular circumstances. If he is working on higher amperage process, he must go with a longer delay adjustment while a short delay is more suitable for less bright arc process. Comparatively a common helmet does not have such feature inside it.

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Welding Cleaning Chemicals Supplier in China

Wuxi Hengda Chemicals, is one of the biggest stockists and manufacturers of welding cleaning chemicals; including stainless steel passivation pickling agent, nozzle anti-blocking agent and anti-spatter liquids to name a few. The company has a well-reputed liquid purification chemical plant located at Donghutang Town territory of Wuxi city. For over 20 year, it has been serving its customers with first-rate quality and reliable products.

A complete and appropriate set-up consists of all necessary equipment and meeting all required standards is what accredits Wuxi Hengda Liquid Purification Chemical Plant as one of the recognized manufacturers in China. Apart from quality and reliability, our on-time delivery and supplying facilities also determine our reputation in market. 

About Our Products
We deal in following products; pickling & passivation gel for stainless steel, anti-weld spatter agent, and anti-blocking agent for nozzle.

1. Pickling and Passivation Gel J-1&J-2 for Stainless Steel

It provides corrosion resistance and helps to eliminate free ion-contamination that tends to remain on stainless steel surface right after machining and fabrication process. The application of this gel forms a thick passive (chemically resistant) layer of chromic oxide which gives adequate resistance against corrosion and continues to maintain stainless steel appearance and shine.

  1. This gel is non-toxic, non-hazardous and non-flammable.
  2. It is bio-degradable and environmental friendly.
  3. It performs dual functions of pickling and passivation.
  4. It helps to reduce critical factors against erosion and erosion-corrosion damage mechanisms.
  5. If used in un-diluted form, it does not affect material’s surface.
  6. It is easy in usage and available at quite affordable rates.

Application Area
Pickling and passivation gel is normally used on stainless steel equipment operating in petrochemical, refining, beverages, pharmaceutical and paper industries. It acts as a cleaning agent to remove coating left over scale, oil stains, rust and mills on equipment surface and keeps the process of passivation.

How to Apply?
  1. Apply the gel on required surface with the help of brush.
  2. Allow it to dwell for a suitable period of time; e-g 1 hour for J-2 gel and almost 10-15 minutes for J-1.
  3. After dwell time is over, clean the residues with the help of cotton waste/rug or water rinse till the surface gets brighter and shinier.

  • Bottle – 1kg
  • Drum – 20Kg

Storage Time - 1 year
OEM Original Equipment Manufacturing and ODM Original Design Manufacturing are welcomed.

2. Ant-Weld Spatter Agent

Anti-spatter spray is a water-based paintable agent for the prevention of weld spatter from the metal surface. It can be applied on a wide range of materials including; carbon steels, stainless steels and non-ferrous metals like aluminum. It’s a best alternative to mechanical grinding and abrasion process to remove excess metal formed as a result of weld spatter. In this way it avoids residual stresses to develop in material due to mechanical removal processes (like abrasion grinding). It also contains inhibitors inside it that protect both base and weld metals against oxidation and corrosion. It facilitates adequate gas flow thus preventing weld defects such as porosity, pitting, pinholes and burn-backs.

  1. It prevents weld spatter to come in contact with work piece and torch tip.
  2. It has significant effect with low consumption rate.
  3. It provides occupational safety.
  4. It is non-flammable and cost-effective.

How to Apply?
  1. Apply equally on either sides of joint with the help of a brush or cotton prior to welding process.
  2. Normally 1Kg of anti-spatter agent can cover an area of almost 20 square meters.
  3. Clean the residue if need be. Normally water rinsing is preferable.

Things not to do
  1. Do not start welding without allowing it to dry out completely.
  2. Avoid spraying on chamfer during operation.

Spray bottle-500g (5Kg, 20Kg, and 25Kg)

3. Anti-Blocking Agent

It acts as an anti-clogging agent and effectively prevents blocking of nozzles from weld splash or spatter. It facilitates welding process to make defect free welds.

  1. Anti-blocking agent is completely non-toxic and non-corrosive.
  2. It is easy in usage and environmental friendly.
  3. It protects welding torch or gun.
  4. It improves welding quality and efficiency.

 How to Apply?
  1. Dip the welding gun about 1-2cm into anti-blocking agent before start welding.
  2. Clean the metal residue after the operation is complete.

  • Cans 200g, 400g
  • 20 Cans/carton

Contact Information
Wuxi Hengda Liquid Purification Chemical Plant
Telephone/Whatsapp: +8613372272718
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Auto Darkening Welding Helmet Manufacturer in China

Taian Leader Cross Boarder Co. Ltd. (TLCB) is a professional and leading manufacturer of Auto Darkening Welding Helmet Products in China. The company have a qualified staff consists of more than eighty (80) people and owns a well-reputed manufacturing unit, covering an area of more than 50,000 square meters. At present our company possesses a wide range of production facilities including; computer controlled plastic injection forming machines, circumfluence and wave crest soldering lines, PCB SMT lines, extra-purificant worktables, spectrometers and optical measuring equipment. Our annual production is about 80,000 pcs.

A welding helmet is a headgear which is used as personal protective equipment (PPE), in order to provide safety, comfort and convenience by providing complete protection from hazardous sparks, heat burns, infrared and ultraviolet rays emitted during welding process.

Our auto-darkening welding helmet is more functional than an ordinary helmet and meets all the requirements of standards DIN EN379 and ANSI Z87. We are proud to say that our all products are CE certified.

About Our Product

An auto-darkening helmet gives clear vision of joint before the start of welding and assists welder to make smooth and sound welds. It has a function to dim arc light automatically with a light control welding mask using optical detection and LCD technology. The main principle behind this includes the detection welding light (mainly infrared or ultraviolet) by an internal photo-electric sensor. The light signal after detection and amplification is then transferred to LCD control circuit. The liquid crystal acts like a light valve which distorts the light colors (green, red, blue etc.) separately. It changes the light transmittance and filters the hazardous (infrared or ultraviolet) rays that can harm a human eye. Finally the signal passes through a polarizer before reaching a human eye.

An auto-darkening helmet not only protects the health of operator/welder but also provides a clear observation for the whole welding process. It has the following exceptional benefits upon a traditional helmet.

  1. Eye Protection: It double filters the UV and infrared radiation to avoid any damage caused by harmful welding arc light and reduces the incidence of electric ophthalmia.
  2. Face Protection: It effectively protects welder’s face from welding splash or spatter and prevents skins burns.
  3. Respiratory Protection: It effectively reduces the potential release of harmful gases and dust caused by welding with an appropriate gas flow system and prevents the occurrence of pneumoconiosis occupational disease.

Main Technical Data and Specifications
Filter Size: 110 X 90 X 11mm
Viewing Area: 98 X48mm
Ultraviolet Ray Transmittance rate: 313-365nm<4x10-6%
Infrared Ray Transmittance rate: 780-1300nm<0.0027%
Switching time: 1/20000s from bright to dark
Recovery time: 0.1s to 0.8s from dark to bright
Dark Shade range: DIN9-13
Light Shade number: DIN4
Power Supply: Solar Cells
Eye Protection: EN 3791/2/1
Face Protection: EN 175
Auto-Power ON/OFF system: Yes
Net Weight: 460g ± 10gw

About Us
For the last fifteen (15) years, we are devoted to develop related products and have successfully promoted several new items in market worldwide. We have won customer’s deep trust and continued support with high quality and competitive prices. Trust us, you can make it.

Contact Us
Taian Leader Cross Boarder Co. Ltd.
Telephone/Whatsapp: +86 15621551278
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How to Prevent Weld Delayed Cracking

Delayed Cracking also known as Hydrogen Induced Cracking or Cold cracking, occurs when the following three factors are present at the same time; high strength steel, high stress level (residual or mechanical/structural loading) and a source of hydrogen. Moisture in welding filler material or environment and joint contamination all are the typical source of hydrogen in a weld metal. Elimination of one or more of the factors can prevent the delayed cracking to occur. So all you need to do is to control these factors to make crack free welds.

High Strength Steels
Steels with high strength level may be susceptible to hydrogen induced cold cracking. Example of this includes; Precipitation Hardened Steels, high strength nickel base alloys, 400 Series Stainless Steels. Welding of above mentioned materials may prone to hydrogen embrittlement in their micro-structure consequently results in cold cracks.

High Stress Level
A weld joint with high stress level is more likely to prone to delayed cracking. It may include residual stresses from cold working or shop fabrication and mechanical or structural loading (for example: wind loadings). These stresses can be reduced by using streamline joint designs and elimination of any sharp edges, corners or notches. Sharp joints and notches are stress raisers where stress concentration may cause catastrophic failure.

Hydrogen Entrapment
As states above hydrogen comes from high moisture content in atmosphere, welding consumables and joint. Thorough cleaning of weld joint at least 25mm on either side, inside and outside if joining a pipe removes grease, oil, coatings, water etc. Preheat the base metal at the minimum of 200 F degrees and maintain the preheat temperature throughout the whole process. It must be ensured that coated consumables are dry stored and baked in ovens prior to use. The Use of low hydrogen rods (H8 or less) helps to prevent cracking. If using SMAW process, the weldment after completion of welding must maintained to about 500 F (260 C)  degrees for about two hours without allowing it to cool down to specified minimum pre-heat temperature.

Prevention of Delayed (Hydrogen Induced) Cracking

  1. Joint must be thoroughly cleaned, dried and free from any kind of rust, scale, mill, oil, grease, coating etc. About one inch from either sides of joint must be cleaned using specific type of cleaning process. 
  2. Make sure to complete at the minimum of 1/3 length of weld deposit without any interruption to avoid any thermal stresses to develop due to high thermal gradient. Before restart, make sure the metal temperature should not below the minimum pre-heat temperature.
  3. Rods must be oven baked according to manufacturer’s specific product details, procedure and recommendation or sealed pack prior to use. Opened rods must be discarded after 7-8 hour of exposure. Use diffusible-hydrogen designator H8 or less filler metals.
  4. Use of low strength materials with good weldable composition and properties, is a best way to avoid cracking.  

If you found a welder using AWS 5.1 EXX10 rods for root pass disallow him. Because it is a general practice in several fabrication shop to use EXX10 rods for roots pass and EXX18 for subsequent hot, fill and cap passes. For this I must say that it’s not a good practice as EXX10 rods are not low hydrogen and not suitable for welds subjected to cold cracking.  Try to use rods with low hydrogen content and with essential pre-heat and post-heat requirements.
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How to Buy Welding Accessories within a Budget

Welding seems overwhelming to beginners. It is too simple to be performed without much guidance in the beginning and comes with a bag full of accessories that need to be arranged for. Welding accessories can easily eat into and take a toll on anyone’s monthly budget.

If you are a novice about to set foot into the world of welding and are clueless about the several nuances that are involved, you’d better consult an experienced welder to walk you through everything from scratch—from choosing the right welding machine to getting acquainted with the instructions to get the perfect weld and also with welding safety measures.  

Read on further ahead to know how you can buy welding accessories on a budget and save on your precious money without compromising on the quality:      

1. Choosing the Right Welding Machine
When choosing a welding machine you should try to hunt for one that has a reserve. The greater the diameter of the welding electrode, the greater is the power consumed by the machine.  Your best bet would be to choose a welding machine that has a high Amp level if you plan to use the machine mostly at home for various small-scale DIY projects. You could look for a welding machine that comes equipped with a hot-start function to facilitate the ignition of arc. Also, you should choose an inverter type welding machine over a transformer-based one even though the latter is cheaper because the former are portable and provide better capacity. 

2. Choosing Welding Electrodes
Before you set out to select your welding electrode, make sure you have decided clearly on the material you would be welding. Also, the thickness of the material has a crucial role to play; usually the thickness of electrodes tends to vary from 2 mm to 3 mm. However, for welding thicker materials, you can choose welding electrodes that are 3 mm – 4mm in their diameter.

3. Choosing Welding Helmets

A welding helmet should have an eye protection glass that is efficient to protect your eyes from the glare of welding. You can check for the efficiency of the welding helmet glass by looking out of the window in a dark room to see if you’re able to spot anything else other than the outline of the window; in case you are able to sight anything other than the window outline, the welding helmet glass isn’t effective enough.

4. Choosing Welding Boots
Welding boots must imperatively be resistant to fire. This is because while welding, the spatter scatters haphazardly in every direction and runs the risk of sparking off a fire at the slightest trigger. Furthermore, look for welding boots that are resistant to electricity and possess a sole of rubber.

5. Choosing Welding Gloves
Needless to say, welding gloves are a must have for you. The sparks and spatter from the welding can cause severe burns to the skin of your hands if you do not protect them under efficient and good-quality leather gloves. However, you may also pick gloves that are cut resistant and can also offer protection from the cold if working in low temperatures. Also, you can look for waterproof welding gloves so as to be able to work properly.

6. Arranging for Steel
Also, for simple home projects or for the sake of learning you could substantially cut down on your costs by arranging for steel at cheap rates from your neighbourhood scrap yard. 

Last, but not the least, remember that while you must be reasonable with your expenditure, you mustn’t simply always go for the cheapest accessory   or equipment available since you might end up compromising on the quality in the process. You can trust brands such as Ador Welding, Esab, Arc Microweld and Weldtech for their reasonably priced welding equipments. 
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