Showing posts with label heat treatment. Show all posts
Showing posts with label heat treatment. Show all posts

Wednesday, November 28, 2018

Ice Star Heat Treatment Controllers


The most innovative and versatile heat treatment control system available today. Ice Star designs, engineers and manufactures heat treatment controllers for electric and gas furnaces, as well as for induction and resistive heating consoles.

Hotfoil-EHS is the exclusive distributor for Ice Star in the United States, Canada, and Mexico.

https://hotfoilehs.com/icestar
609-588-0900

Saturday, November 10, 2018

Mobile Generator and Power Console Trailers by Hotfoil-EHS


Hofoil-EHS manufactures mobile generator trailers for welding heat treating power and temperature control. Custom designed from large to small, Hotfoil-EHS will build to your specification.

609-588-0900

Thursday, October 25, 2018

Hotfoil-EHS Heat Treating Power Consoles


Precise control over your pre-weld and post-weld heat treatment parameters are critical. Accurate temperature control, specific soak times, uniformity, and controlled heat up and cool down times are required to ensure strong welds. Hotfoil-EHS power consoles are designed to provide the best control, easiest user interface, and longest lasting operation, even in the toughest environments. Using only the highest quality components, Hotfoil-EHS power consoles are field-tested and application proven. Control systems can be specified with or without recorders or ramping controllers, and are standardly available in 6, 9, 12, 18, and 24 zone configurations.

https://hotfoilehs.com
609-588-0900

Monday, September 24, 2018

Industrial Heat Treatment Furnaces, Big and Small

Here at Hotfoil-EHS, we are capable of building furnaces of many sizes, big and small. From small, low-throughput furnaces, to much larger high yield furnaces, to rail-driven furnaces designed to move back and forth over the materials being heated, Hotfoil-EHS Design Engineers and Fabrication Shop has done it all. Gas or electric, Hotfoil-EHS has the experience to build a custom furnace to your exact specification.  If you can think it, we can build it!

Hotfoil-EHS
https://hotfoilehs.com
609-588-0900

Thursday, August 9, 2018

Gas Trains and Combustion Systems by Hotfoil-EHS


Hotfoil-EHS manufactures complete gas trains and combustion systems complete with:
  • Dual ASCO valves for start-up (6 to 10 million BTU systems only)
  • Air light and air switch
  • Low-gas and high-gas switch
  • Gas light
  • Ignition transformer and ignition light
  • Burner on light
  • Dual main gas valves
  • Strobe light and horns as well as the mute buttons
  • Proof of Closure Switch
  • UV Sensor
  • UV Meter
  • Re-set button
  • Veriflame control module
  • Relays mounted inside a Nema 4 control box
  • Ramping controller for timing the ramp
https://hotfoilehs.com
609-588-0900


Thursday, July 19, 2018

Hotfoil-EHS Heat Treatment Equipment

EHS engineers, designs, and manufactures proven heat treatment systems to effectively complete any project more efficiently than competitive systems, while staying within any budget. Years of application experience and successful installations have produced thousands of happy customers. A focus on customer service second to none.

Tuesday, June 26, 2018

Hotfoil-EHS Expanding to United Kingdom with New Engineering and Manufacturing Center

Hotfoil-EHS UKHamilton, N.J., June 8, 2018 - Hotfoil-EHS, Inc., America's premier manufacturer of industrial heating equipment, announced today the opening of their United Kingdom facility in Birmingham, England.

"The opening of our UK facility signals a homecoming of sorts, since our original company, Hotfoil, was founded in the mid-1960's in England,” said Hotfoil-EHS President, Matt Richards. “The Birmingham location makes perfect sense for Hotfoil-EHS. After several ownership changes, my father, Neville Richards, took ownership in 1993." Richards continued, "Since then, we have grown though key acquisition and new product development. This move also is the first step in our aggressive strategy to expand into the international market.”

The new Hotfoil-EHS facility in Birmingham will provide the UK with a large local inventory of power consoles, recorders, ceramic heaters, and a full line of accessories used for heat treatment. Hotfoil-EHS UK will also supply hopper heaters, tank heaters, vessel heaters as well as control systems.

According to UK General Manager David Robbins, “The opportunity to introduce such a high quality product line to the UK is wonderfully exciting. I am delighted to be working with such a well established US company and progressive management team."

About Hotfoil-EHS
Manufacturer of America's premier heat treatment and industrial heating equipment, Hotfoil- EHS is driven by providing the highest quality products, delivering the best customer service, and keeping costs low. Their headquarters and main manufacturing facility is located in Hamilton, NJ and have two additional manufacturing operations in Laporte, TX and Chattanooga, TN.

For more information contact Dean Prassas by emailing dap@hotfolehs.com or by visiting:

https://hotfoilehs.com
https://hotfoilehs.co.uk
https://www.facebook.com/hotfoilehs

Friday, May 25, 2018

Hotfoil-EHS Manufacturing and Distribution Facilities

Hotfoil-EHS, Inc. is an organization with over 70 employees and an impressive engineering capability. Through continued re-investment of profits, Hotfoil-EHS acquired additional large fabrication facilities and today is a full-service engineering, design, and manufacturing company of industrial heating equipment. Their Hamilton, NJ headquarters provides 68,000-square-feet of manufacturing space, with other manufacturing and distribution facilities located in Chattanooga, TN, LaPorte, TX, and Birmingham, England.

609-588-0900

Wednesday, May 16, 2018

The Importance of Post-weld Heat Treatment for Welding Repairs

welding
Welding is the process of melting two metals together. During the welding process, the metal is exposed to very high temperatures and undergoes a phase change, first from solid to liquid, then back to solid as it cools.

During welding, residual stresses are formed in an area referred to as "the heat affected zone" or HAZ. In the HAZ, differential contractions occur as the metal heats, liquifies and then cools to ambient.

Residual stresses have a significant impact on the performance of a weld and their reduction is highly desirable. The undesirable impact of residual stresses in welded metal structures involve fatigue performance and corrosion resistance.

heat treating furnace
Heat treatment furnace.
pwht with resistance heaters
PWHT with resistance heaters
Welding repairs are increasingly a structural integrity concern for aging  equipment such as pressure vessels, piping systems and other large steel systems. The make up of residual stresses near repair welds can be drastically different from those residual stresses of the original weld.  Post-weld heat treatment (PWHT) is used to reduce residual stress in steel and and should be used for welding repairs ( as well as on new welds).

PWHT is proven very effective in reduction of high residual stress around the weld repair. Conventional PWHT can be done by combustion furnace, induction heaters or electric resistance heaters (ceramic pad heaters). Accurate ramp and soak times, as well as data recording can be done with modern power console systems. It is strongly recommended to apply PWHT for all original and repair welds.

Saturday, April 14, 2018

Custom Heat Treatment Furnaces Designed for the Most Challenging Applications

Hotfoil-EHS is a New Jersey based company who will design and fabricate custom heat treatment furnaces. From small, low-throughput furnaces, to high yield furnaces, to rail-driven furnaces designed to move back and forth over the materials being heated, Hotfoil-EHS has done it all.

From decades of experience in furnace production, many important furnace engineering discoveries were made that save time, money, and improve the end product.

Contact Hotfoil-EHS for your next heat treatment furnace requirement.

https://hotfoilehs.com
609-588-0900

Wednesday, April 4, 2018

American Made Heat Treatment Equipment: Everything You Need from One Reliable and Knowledgeable Source

Hotfoil-EHS manufactures pre and post-weld heat treating equipment including: power consoles; ceramic mat heaters; thermocouple attachment units (TAUs); pin welders; Brinell testers; Poldi hardness testers; thermocouple wire; insulation; and accessories.

EHS engineers, designs, and manufactures proven systems to effectively complete any project more efficiently than competitive systems, while staying competitive within any budget. Years of application experience and successful installation history have produced thousands of happy customers.  Quality and durability at an affordable price, and a focus on customer service second to none.


Wednesday, January 31, 2018

Pre Weld and Post Weld Heat Treatment

Pre Weld and Post Weld Heat Treatment
Welding between insulated heating areas
Heating done by ceramic heaters (pink). 
There are several key reasons why it's important to preheat before welding. First, a preheated part cools more slowly, which slows the overall cooling rate of the welded part. This improves the metallurgical (crystalline) structure and makes it less prone to cracking. Additionally, hydrogen that may be present immediately after a weld is also released more efficiently, which further reduces the possibility cracking. Preheating also mitigates stress from the shrinkage at the weld joint and nearby metal. Finally, pre-heating reduces the possibility of fracture during fabrication due to brittleness.

An industry standard means of accurately managing the pre-heat and post-weld heat treatment is through the use of specialized electric heaters. Electric welding preheaters, known as "ceramic mat heaters", are rugged and flexible heating elements designed so that they conform uniformly around the weld and surrounding area.  Ceramic mat heaters are normally controlled by a power console that uses thermocouples and electronic controllers to regulate, monitor, and many times record, the preheat temperature profile.

ceramic mat heaters on spool piece
Ceramic heaters on spool piece.
Welding codes, gathered from years of rigorously tested data, including metallurgical science, chemical properties of materials, and radiographic analysis, provide specific detail on the minimum preheat temperature, the soak time, and the welding process to be used.

Before deciding to preheat or post heat any welding job, consult with a heat treating expert to make sure proper welding code requirements are being followed.

Monday, November 6, 2017

The History of Hotfoil-EHS

Hotfoil-EHS Headquaters in Hamilton, NJ
Hotfoil-EHS Headquarters in Hamilton, NJ
Hotfoil has a long, established history of product innovation and quality.

Since its founding in the United Kingdom in the mid 1960’s, the company has gone through several changes in ownership and management. In 1993, my father, Neville Richards, and I took ownership of Hotfoil, Inc.

AFTek in Chatanooga, TN
AFTek in Chatanooga, TN
  • In 1996, Electric Heating Systems (EHS) was formed to provide equipment to the heat treating industry.
  • In 2007, we recognized the value of producing our own transformers, both for internal needs as well as external sales. Soon after, a welding equipment and transformer manufacturer named AFTek was acquired. AFTek-EHS operates today in Chattanooga, TN.
  • In 2010, HeatandWeld.com was launched as the e-commerce division of Hotfoil and EHS, selling our line of heaters, controls, and heat treating consumables.
  • In 2012, Hotfoil and EHS merged into a new entity appropriately named Hotfoil-EHS, Inc. The merger produced an organization with over 70 employees and an impressive engineering capability.
Hotfoil-EHS in LaPorte, TX
Hotfoil-EHS in LaPorte, TX
Through continued re-investment of profits, Hotfoil-EHS subsequently acquired additional large fabrication facilities and assets, resulting in expansive facilities that include laser cutters, CNC machines, sheet metal breaks, Bridgeport milling machines, rollers and welding machines.

Today, Hotfoil-EHS is a full-service engineering, design, and manufacturing company for any type of industrial heating requirement.

Hotfoil-EHS in LaPorte, TX
Hotfoil-EHS in LaPorte, TX
From what started in 1993 as a humble 800-square-feet facility in a commercial office building, has grown to a total of 68,000-square-feet of manufacturing space located in Hamilton, NJ, Chatanooga, TN, and LaPorte, TX. In 2018, Hotfoil-EHS will open it’s first international location with the launch of a new Birmingham, England facility.

Thursday, September 28, 2017

Heat Treatment Controllers

ICE STAR manufactures fully digital heat precise and reliable treatment controllers. The ICE STAR controllers ISQ and ISC have from 6 to 12 controlling thermocouple's and up to 36 monitoring thermocouple's. More measurement points are available by connecting up to 14 controllers to each other wirelessly or with cables. The controllers are designed for any kind of heat treatment consoles and furnaces, and can be mounted inside or to front panel. Hotfoil-EHS is the North America representative for ICE STAR.


For more information, visit https://hotfoilehs/icestar or call 609.588.0900.

Friday, September 8, 2017

Large, Custom Heat Treat Furnace Fabrication

The video below demonstrates the erection of a 16' x 16' x 62' heat treat furnace built out of a 6x6 I-Beam skeletal structure with 11 gauge steel skin. Full size doors, two per end, will allow the furnace to heat loads using it's full volume. The furnace is equipped with eight 3-Million BTU burners, one at either end and 3 down each side, to circulate the air. Four dampers are included, two at each end. It will move back and forth on a rail system by (16) 10" crane wheels. A hydraulic system will act to lift the furnace 3" in the air off the hearth. This will allow the furnace to move freely and without damaging the insulation on the bottom seals. It will be controlled via a remote HMI screen with full SCADA capabilities.

For more information, visit http://www.hotfoilehs.com or call 609.588.0900.

Wednesday, May 10, 2017

New Product: The ISG Wireless Heat Treatment Controller

ISG heat treat controller
The ISG heat treat controller.
The ISG heat treatment controller is a panel-mounted controller which can easily be connected to thyristor, electrical contactor, or induction/inverter driven power sources. The controller has 2 analog outputs, 5 digital outputs, 2 analog inputs and 2 digital inputs.

The ISG is capable of controlling two measurement points and monitoring two measurement points. If more measuring points are required, up to 14 controllers can be daisy-chained to the same heating process via cables or wireless, while all being managed from a single computer. The ISG communicates with PC's via Zigbee radio or with an RS485 Serial port.

All routines or process plans are created with ISPort software. After the process is started, the routine and the process data is saved to the PC, and also to the controller's memory. This enables the controller to work independently should the connection between ISG and computer be lost. The ISG includes a convenient LED process display and additional process status and alarm LED's.

For more information on the ISG heat treatment controller, visit http://www.hotfoilehs.com or call 609.588.0900.

Tuesday, March 28, 2017

Weld Heat Treatment is Critical to Structure Integrity

Welding pre-heat
Welding pre-heat is critical to the quality of the weld and
and the integrity of the structure.
In any large scale welding operation (such as pipeline welding, shipbuilding, boiler fabrication) heat treatment is critical to the quality of a weld, and therefore critical to the performance of a structure, and never should not be taken lightly.

When in doubt, review of industry code or a consultation with a welding expert is imperative. Welding code is the first determinant to whether pre-heating is needed. Welding code carefully specifies the minimum preheat temperature, the soak time, and the welding process. Many criteria are considered by welding codes, all gathered from years of rigorously tested data. This data is accumulated from many sources, including metallurgical science, chemical properties of materials, and radiographic analysis.

In its simplest form, weld heat treatment is the process of heating the base metal (parts to be welded) to a desired temperature prior to welding, and then allowing it to cool at a given rate under controlled conditions. The specific temperature to which the part needs to be heated (before welding) is referred to as the “preheat temperature”.

There are several key reasons why it's important to preheat before welding. 
  • A preheated part cools more slowly, which slows the overall cooling rate of the welded part. This improves the metallurgical (crystalline) structure and makes it less prone to cracking. 
  • Hydrogen that may be present immediately after a weld is also released more efficiently, which further reduces the possibility cracking. Preheating also mitigates stress from the shrinkage at the weld joint and nearby metal. 
  • Pre-heating reduces the possibility of fracture during fabrication due to brittleness.
Electric welding preheaters, known as "ceramic mat heaters", are rugged and flexible heating elements designed so that they conform uniformly around the weld and surrounding area.  Ceramic mat heaters are normally controlled by a power console that uses thermocouples and electronic controllers to regulate, monitor, and many times record, the preheat temperature profile.

Another less preferred method to heat the target piece is with a torch, or open flame, but this method carries safety concerns as well as controllability issues. Furnaces are also used, but these typically require the transport of the target piece off-site.

Induction heaters offer an attractive alternative for safety, portability and controllability. Induction heating is unique because it uses molecular excitation as its source of heat, as opposed to open flames or external electric elements. Induction heating works very quickly, and since there is no contact with the target piece, there are far less concerns about part contamination.  Many industrial processes use induction heating when very high temperatures and uniform control is desired.

Each welding application has it's own unique set of circumstances which dictate the optimal heat treating method.  It is always best to contact an expert and solicit their opinion on your best available option.