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Unravelling the Mystery of Heat Treatment

06 October, 20 2:05 pm · Leave a comment · Red-D-Arc Welderentals
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This article originally appeared in Connector Magazine, Fall 2020 Edition

Erectors can save cost and time by taking this welding technique in-house

preheating process pipe

Large steel erection projects commonly require heat treatment for welding because of the thick materials used in structural steel construction. Proper implementation is critical; so often this work is outsourced. The perceived level of expertise to perform this work can make the prospect of using in-house personnel daunting. However, most welding contractors are actually fully capable of performing on-site heat treatment operations.

The two primary methods for heat treating metal are preheating and post-weld heat treatment (PWHT). Preheating is the process of heating the base metal to a specific temperature prior to welding to minimize the temperature difference between the welding arc and the base metal. This process helps to reduce internal stresses that occur as substantial temperature differences between the weld and the base metal normalize, which can cause cracking and distortion. Slowing the cooling rate also allows hydrogen to escape from the weld, which minimizes the potential for cracking.

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New Rental Product: Welding Fume Extractor Torches

10 June, 19 6:53 pm · Leave a comment · Red-D-Arc Welderentals
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Fume Extractor Welding TorchWe are pleased to announce that we have added Abicor-Binzel Fume Extractor MIG Torches to our equipment rental fleet.

These portable, compact and powerful high-vacuum extraction units FES-200 & FES-200 W3 capture welding fumes directly at the source, protecting both the welder and the environment from harmful particles.

The machines come with an auto start-stop function so that the fume extractor is activated only when welding is in progress. Welding becomes safer, energy consumption is reduced and unecessary noise levels are eliminated.

You can rent these fume extractor welding torches from red-d-arc.uk

Customer Open Day at Air Liquide Offshore in Aberdeen – May 23, 2019

10 May, 19 5:48 pm · Leave a comment · Red-D-Arc Welderentals
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Welding Demonstrations at Open House in Aberdeen Scotland

We are holding an open house jointly with Air Liquide Offshore in Aberdeen on May 23, 2019 from 12 noon onwards.  RSVP HERE

Join us to learn more about the equipment and services we provide for offshore projects. 

  • Rediscover the Quad 450High Pressure and Optimised footprint  
  • Weld with the Arcal Exeltop state of the art cylinders 
  • Red-D-Arc Welding Demos showcasing the Arcal Premium Brand 
  • DI Global Dry Ice Blasting – Minimize waste, reduce costs and improve efficiency with dry ice blasting =

 

Stone baked  pizza and refreshments served throughout

After event drinks at Orchid, Justice Mill Road – 5:30-7:30 pm

Refurbished 30 Tonne Welding Positioner

27 February, 19 4:35 pm · Leave a comment · Red-D-Arc Welderentals
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We are currently offering this 30T welding positioner for sale.  Contact your nearest Red-D-Arc Branch for details

used welding positioner

Special Offer: Used Welding Rotators

12 February, 19 4:22 pm · Leave a comment · Red-D-Arc Welderentals
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used welding rotator set 500 Tonnes

We are currently offering 2 sets of completely refurbished welding rotators (500 Tonne).

  • Carrying Capacity 500T
  • 2 Complete Systems Available
  • Delivery Time 10/12 Weeks
  • 3 Month Warranty Included

500T-SET-GA-Refurbished-Welding-Rotator-Set-2.pdf

Pricing:

£ 51,350.00
€ 58,750.00
$ 65,750.00

Contact your local Red-D-Arc branch for more information.

Red-D-Arc Feature in Tank Storage Magazine

03 July, 18 9:26 pm · Leave a comment · Red-D-Arc Welderentals
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AGW Automatic Girth Welder 3 Oclock Welder - Tank Storage Mag
Red-D-Arc was featured in the December/January issue of Tank Storage Magazine in an editorial titled “Rental welding equipment for storage tank fabricators”. Tank Storage Magazine is an industry leading publication, reporting exclusively on the bulk liquid tank storage and terminal sector.

The storage tank construction industry is highly competitive and fabricators gain a significant advantage by leveraging Red-D-Arc’s rental fleet of automatic tank welding equipment. Red-D-Arc supplies specialized automatic storage tank welding equipment to companies in the tank fabrication industry for projects all over the world.

Along with our specialized tank welding equipment comes a highly knowledgeable and experienced team of Red-D-Arc technicians. Sayer Hendricks – storage tank welding equipment specialist at Red-D-Arc is quoted in the article: “A fabrication company without prior knowledge of the equipment, is able to rent a turn-key tank welding automation system and increase their welding productivity by 40-50%. With on-site training, service and support, our customers are up and running quickly and making 100% x-ray quality welds without fail”

The full article is available here: Rental welding equipment for storage tank fabricators

The Importance of Welding Surface Preparation

28 March, 18 8:00 pm · Leave a comment · Red-D-Arc Welderentals
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By guest blogger David H.

welding surface preparationHaving worked in shipyards for seven years, I’m familiar with how dirty this type of job site can be. Ship repair worksites and welding surfaces are often filthy with rust, dust and other contaminants. Even in shops and yards where fabrication is ongoing, cleanliness is often lacking. If fabricated or refurbished pieces are being installed onboard, the surface to which the piece will be welded could be rusty, coated with scale, or have other types of corrosion.

It is hard to overstate the importance of having a clean surface when welding. Welds made on unclean surfaces can become contaminated and fail; this is especially true with certain metals, such as aluminum, and certain types of welding, such as TIG, but for all welds at least some level of cleanliness is important.

Methods and Equipment

There are numerous methods available for cleaning surfaces. The most basic are simple wire brushes and scrapers; these are ineffective beyond removing common dirt and simple surface contamination. Some hand-held tools, such as grinders and reciprocating needles are slightly more effective.

A surface that is properly prepared by blast cleaning can help you ensure fewer problems with weld quality.

Deeper cleaning processes can help to ensure high-quality welds. This is particularly important where a failed weld could be costly or create shipboard dangers for the crew. For corroded or contaminated surfaces something stronger is required. Some of the best systems available are blast cleaners. Red-D-Arc has a number of blast cleaning rental options. Dry-ice cleaning systems are environmentally sustainable, non-destructive, and use inexpensive, readily available dry-ice pellets. Recycled glass systems, which reduce dust by as much as 95% compared to dry-blasting, are available too.

Take a look at our selection of  rental blast cleaners which can powerfully clean up the dirtiest weld surface. A surface that is properly prepared by blast cleaning can help you ensure fewer problems with weld quality.

Tube Düsseldorf Tradeshow 2018

23 March, 18 2:56 pm · Leave a comment · Red-D-Arc Welderentals
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Red-D-Arc will be exhibiting at Tube Düsseldorf trade show in April. Be sure to drop by booth 6F23 in Hall 6 to view our latest pipe welding and cutting equipment.

Tube Dusseldorf Tradeshow Announcement

Red-D-Arc offers a comprehensive selection of pipe welding equipment for rent.

Preheating Weldments

21 March, 18 5:59 pm · Leave a comment · Red-D-Arc Welderentals
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Importance of Preheating in Welding – Equipment Options

Preheating pipe for welding

Why preheat?

Preheating reduces the risk of cracking in weld metal and heat-affected zone (HAZ) by:

  • Lowering the cooling rate of the weld – prevents formation of brittle weld metal/HAZ, allows more time for hydrogen to escape the molten weld.
  • Removing moisture (hydrogen source) from the part.
  • Reducing shrinkage by lowering the temperature differential.

Preheat or not?

The requirement and level of preheating for steel is determined by the relevant welding code and is dependent on the weld heat input, chemical composition of steel (carbon equivalent), thicknesses, diffusible hydrogen etc. Non-ferrous materials generally require preheat because of their high thermal conductivity.

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Special Offer – Used Welders

20 March, 18 9:01 pm · Leave a comment · Red-D-Arc Welderentals
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Used Welding Machines UK

We have a number of reconditioned used welders available for purchase including:

  • TransPulse Synergic TPS 5000 MIG/MAG Package with wirefeeder and cooler
  • Miller Maxstar 200 Autoline – Stick, TIG, Pulsed TIG, Air Carbon Arc Cutting
  • Lorch T-300 TIG Welder – Stick, TIG, Pulsed TIG

Each of these welding machines comes with a 90 day warranty.

View our flyer for details.

AirGas Logo

Airgas, an Air Liquide company, is the nation's leading single-source supplier of gases, welding and safety products. Known locally nationwide, our distribution network serves more than one million customers of all sizes with a broad offering of top-quality products and unmatched expertise.