Showing posts with label Ceramic Mat Heaters. Show all posts
Showing posts with label Ceramic Mat Heaters. Show all posts

It's a Great Time to Purchase Heat Treatment Equipment

It's a Great Time to Purchase Heat Treatment Equipment

If you've been putting off a heat treatment equipment purchase, waiting for a slower month or a better moment, take a fresh look at the calendar. Several things are lining up right now, making this a smart window to buy. We're seeing it in our own order book.

Why is demand for pre-weld and post-weld heat treatment so strong right now?

The work is coming. LNG export terminals are moving from announcement to construction, and Gulf Coast pipeline projects are running at a pace the industry hasn't seen in years. Data centers are pulling new gas-fired power generation along. Advanced nuclear projects are getting out of the paperwork stage, with test reactors reaching criticality and the Army lining up microreactor sites. On the defense side, the Navy is asking for a big jump in shipbuilding funding, and submarine and shipyard suppliers are gearing up.
What do they all have in common? Thick-wall piping, pressure vessels, and welds that codes say must be preheated and stress-relieved. Every one of those welds needs controlled heat, accurate temperature recording, and documentation that will satisfy an inspector. That's where our power consoles, ceramic mat heaters, and furnaces come in.

Can the tax rules really make equipment cheaper to buy?

They can, and this may be the most practical reason to act. Federal law now allows 100% bonus depreciation on qualifying equipment acquired and placed in service after January 19, 2025. It's permanent, so the old phase-down schedule no longer applies. Section 179 expensing also expanded, with a $2.5 million limit. In plain terms, many contractors can deduct the cost of qualifying equipment in the year they put it to work, rather than spreading it over several years.
We're not tax advisors, so please run your own situation past your CPA. But if a new power console or a set of heaters has been sitting on your wish list, ask how these rules apply to you. Equipment that pays for itself sooner is easier to say yes to.

What about tariffs and imported equipment?

Metal tariffs have been reshuffled several times this year, and they'll probably change again. We can't tell you where they'll land, and raw material costs can move with them. What we can tell you is how we build. We build everything here, in-house. We laser cut our own control panels, fabricate our own frames, and assemble the equipment ourselves. Nothing is outsourced.
When you buy from a manufacturer that controls its own production, you're less exposed to the shipping delays and pricing swings that come with imported gear. If you're comparing quotes, that's worth weighing alongside the sticker price.

Is the equipment actually available?

That's a fair question, because lead times tend to stretch when work picks up. It has been an exceptional year for us. Our heater lines are turning out 200 to 400 units a day. We're currently building 140 computer-controlled power consoles alongside several custom furnaces, and we expect 60 or more additional consoles in the fourth quarter. Units are shipping nearly as fast as they come off the line.
That's good news, but it's also a reminder that the shops that order early get their equipment before the next wave of projects hits. If you know you'll need more capacity by spring, ordering this fall is a lot less stressful than ordering in March with a crew waiting.

What should you be looking at?

It depends on the work you do.
Field contractors usually start with computer-controlled power consoles and recorders. A growing number are also going to containerized control rooms. We've completed six CONEX-based conversions this year, turning shipping containers into fully equipped heat treatment control rooms that arrive ready to set down on a job site.
Fabrication shops often get the most value from a furnace sized to their product. We build custom electric and gas-fired furnaces, including large units big enough to handle major vessel sections.
Shipyards and busy production floors should look at multi-operator welding units, such as our AFTEK-EHS Power Family, which let several welders work from one system.
Across all of these, our ceramic mat heaters come in a wide range of voltages and sizes, and we make them in the USA.

A quick word on price

We won't pretend to be the cheapest option, and we don't try to be. We'd rather sell you equipment that runs reliably through a long outage season, a rushed shutdown, or a cold January pipeline job. Our customers tend to care most about whether the gear works when the crew is standing around waiting on it.

How to get started

The simplest way is to call us at 609.588.0900 and tell us what you're working on. It helps to know the codes you're working to, your typical material and wall thickness, how many zones you need to control, and when you'd like to be up and running. From there, we can point you to the right combination of consoles, heaters, and accessories, or talk through a custom build.
The pieces are in place: strong demand, favorable tax treatment, and a manufacturer with equipment coming off the line. The best time to buy is when you can still choose your delivery date instead of waiting in line. If a purchase is anywhere on your radar for the next year, start the conversation now.

Top 3 Reasons to Choose Hotfoil-EHS Heat Treatment Products

Top 3 Reasons to Choose Hotfoil-EHS Heat Treatment Products

You've got a critical weld on a pressure vessel or pipeline, and the metallurgy demands you get the preheat and PWHT exactly right. The last thing you need is a power console that shipped from overseas, comes with a PDF manual written in broken English, and has a support line that rings through to a timezone twelve hours away.

That's the real-world problem that leads fabricators, welders, and plant engineers to ask why choose Hotfoil-EHS — and the answer has everything to do with where they're built, who builds them, and how the company shows up after the sale. Here are the top three reasons to work with Hotfoil-EHS.



Reason #1: Everything Is Built in the U.S. — and That Actually Matters for Heat Treatment Work

Hotfoil-EHS designs and manufactures its PWHT power consoles, ceramic mat heaters, thermocouple attachment units (TAUs), and custom heat-treat furnaces right in Hamilton, New Jersey. This isn't a marketing line — it's a direct operational advantage.

When your control zones need to be reconfigured, when a replacement part has to arrive fast, or when you need to talk to an engineer who actually built the system, domestic manufacturing makes all of that possible. With imported equipment, you're gambling on lead times, customs delays, and phone support that can't actually service what you bought.

The short version: American-made means faster support, tighter quality control, and full traceability on every unit.



Reason #2: Hotfoil-EHS Has Been Doing This Since the 1960s — and the Family That Runs It Takes It Personally

Hotfoil traces its roots to the United Kingdom in the mid-1960s. Since 1993, the company has been owned and operated by the Richards family, who built their entire business around one principle: the customer comes first, always.

That kind of tenure in the heat treatment space isn't just history — it's evidence. The engineering team has handled thousands of successful installations across power generation, oil and gas, chemical processing, and heavy fabrication. They've seen the edge cases, the code compliance headaches, and the field problems that only come up after years of hands-on work. When you call with a specific application challenge, you're not talking to a sales rep reading from a script.

Experience you can measure in decades means fewer surprises on your job site.



Reason #3: Hotfoil-EHS Doesn't Just Sell Equipment — They Partner With You Through the Whole Job

A lot of companies will hand you a power console and wave goodbye. Hotfoil-EHS takes a different approach. Their engineering team stays involved — providing application assistance, system configuration guidance, and technical support that lasts the life of the equipment.

Their HeatAndWeld.com platform makes it easy to order ceramic heater beads, thermocouple wire, Brinell testers, insulation, recorder supplies, and every other consumable and accessory you need to run a tight heat-treating operation. It's not an afterthought — it's a complete ecosystem built around how welding and heat treatment work in the real world. Add in their custom-built furnaces for on-site or portable PWHT, and you've got a single source that can handle your whole thermal cycle, not just one piece of it.

If you need it for pre-heat or PWHT, Hotfoil-EHS either makes it, stocks it, or can build it.


The logical next step is simple: head to HotfoilEHS.com or give their Hamilton, NJ team a call at 609-588-0900. Tell them what you're working on, and they'll tell you exactly what you need — no upsell, no runaround.

Preventing Cracks and Warps: Ceramic Pad Heaters in Action

Preventing Cracks and Warps: Ceramic Pad Heaters in Action

Welders rely on ceramic pad heaters, also known as ceramic mat heaters, to maintain and control temperature during welding. They place these flexible mats on or around the weld zone to either slow cooling or provide consistent heat for stress relief. By applying steady, localized warmth, ceramic pad heaters help prevent cracking, warping, and other common defects when the material cools too rapidly or remains unevenly heated.

Early ceramic pad heaters had a rigid design, which made them more prone to breakage and less adaptable to complex shapes. Manufacturers then adopted interlocking ceramic beads and flexible high-temperature fabrics to create mats that bend and wrap around pipes, flat panels, and other irregular surfaces without losing functionality. This improvement boosted their durability and expanded their usefulness in applications that require preheating, post-weld heat treatment (PWHT), or ongoing temperature maintenance.

Modern versions incorporate more robust materials and advanced electrical connections. Engineers added high-temperature lead wires, better insulation, and stronger ceramic beads to withstand the intense heat cycles and demanding conditions in industrial environments. Fabricators gain an advantage by pairing these heaters with specialized temperature controllers, which enable precise regulation of heat input and ensure uniform distribution across the welded area. Through these design enhancements, ceramic pad heaters have become an indispensable tool that promotes weld quality, reduces rework, and lengthens the lifespan of critical metal components.

Hotfoil-EHS, Inc.
2960 East State Street Ext.
Hamilton, NJ 08619
Phone # 609.588.0900
Fax # 609.588.8333
www.hotfoilehs.com


Understanding the Importance of Ceramic Mat Heaters in Pre-Weld Heating Applications

Understanding the Importance of Ceramic Mat Heaters in Pre-Weld Heating Applications

Ceramic mat heaters, also known as ceramic pad heaters, play a crucial role in pre-weld heating applications. They provide controlled, uniform heating to prevent thermal stresses and ensure proper metallurgical bonding during welding. The construction and application of these heaters in pre-weld heating involve several steps.

Material Selection: Manufacturers use high-quality ceramic materials for these heaters due to their excellent thermal insulation properties. The ceramic insulates the heating wire, preventing heat loss and ensuring uniform heat distribution.

Heating Element: The core component of a ceramic mat heater is the heating element, typically made of nichrome wire. Due to its high electrical resistance, this wire generates heat when electrical current flows through it.

Ceramic Beads: The nichrome wire gets threaded through ceramic beads, essential for insulation. These beads have a hollow cylindrical shape with an opening for the wire. Manufacturers arrange these beads in a pattern, often alternating rows, to form the heater's structure.

Assembly: After threading the nichrome wire through the ceramic beads, manufacturers shape the heater into a flexible mat-like structure, which can conform to the surface it needs to heat. The ceramic beads serve as spacers between adjacent turns of the wire, preventing short circuits and ensuring uniform heat distribution.

Electrical Connections: Manufacturers attach electrical leads to the heating element, enabling connection to a power source. These leads can be customized depending on the application, such as the voltage required and the type of power source available.

Outer Insulation: An outer insulating layer, typically made of fiberglass or silicone rubber, is added to the heater mat. This layer enhances the insulation properties, provides protection against environmental factors, and prevents electrical shocks.

In pre-weld heating applications, these ceramic mat heaters ensure uniform heating and minimize thermal stresses in the welded material.

Placement: The operator places the ceramic mat heater onto the workpiece that requires pre-weld heating. The heater's flexibility allows it to adapt to curved surfaces, ensuring good contact with the workpiece.

Power Source: The operator connects the heater to a power source, usually a welding machine or a dedicated power supply unit. The power source provides the necessary electrical current to the nichrome wire in the heater, generating heat.

Temperature Control: The operator sets the desired temperature and heating rate for the pre-weld heating process using a temperature controller. The controller regulates the current flowing through the heater, ensuring uniform temperature distribution and preventing overheating.

Monitoring: The operator monitors the temperature throughout the pre-weld heating process, ensuring the workpiece reaches the desired temperature uniformly. Proper temperature control is vital to achieve optimal welding conditions and prevent issues like cold cracking or porosity in the weld.

Removal: Once the workpiece reaches the desired temperature, the operator disconnects the ceramic mat heater from the power source and removes it from the workpiece, ensuring the surface is clean and ready for welding.

By following these steps, ceramic mat heaters provide consistent, controlled heating for pre-weld applications, enhancing weld quality and reducing the risk of defects in the final product.

Hotfoil-EHS
609-588-0900

New Hotfoil-EHS Product Catalogs

There are 2 updated Hotfoil-EHS catalogs available for download now.

A revised and updated Hotfoil product catalog can be downloaded here. It includes information about Type HB Hopper Heating Modules,Type FRP Heating Panels, Type ELP Heating Panels,Type GA Heating Blankets, Type HSR / HSRX Silicone Rubber Heaters, Type PCW and SRC Heating Cable, Type MI Metal Sheathed Heating Cable, Tank Heating Controls, Hopper and Chute Heater Controls, and Heat Control Systems for Hazardous Areas.

A revised and updated EHS product catalog can be downloaded here. It includes information about Power Consoles, Fusion 45 Induction Console, Ice Star Heat Treatment Control System, Ceramic Mat Heaters, Rope Heaters, 4-Banks and Accessories, Temperature Recorders, Pinwelders & Thermocouple Attachment Units and Accessories, Brinell Tester & Poldi Hardness Testers, Triple Cable Sets, Splitters, Insulation and Accessories, T/C Wire, Banding, Twistlocks and Accessories, EHS Gas Trains, Furnace Fabrication & Capabilities, and Custom Generator Trucks / Mobile Heat Treatment.

For more information, contact Hotfoil-EHS by calling 609-588-0900 or visiting their web site at https://hotfoilehs.com.

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.

Ceramic Pre Weld and Post Weld Heaters Get The Heat to the Weldment Efficiently

Ceramic mat heaters
Ceramic mat heaters
The most important feature of a resistance heater is the ability to transfer the heat away from the resistance wire to the outer covering where it can be absorbed by the work piece. Even when accurately controlled, a poorly designed or poorly applied heater can cause the wire temperature to exceed the wires operational limits. Ceramic mat heaters, also known as ceramic pad heaters, are designed to produce more even and efficient heat transfer while maintaining maximum flexibility.

Design:

1) Sintered alumina oxide is formed into shapes and fired at precise temperatures to produce a ceramic insulator with a combination of high dielectric strength and efficient, fast heat transfer. This ceramic is also solid enough to withstand physical shock and resistance to oxidation and corrosion from a broad range of chemicals and atmospheres.

2) An accurately measured length of stranded nickel-chromium wire is precisely wound through the ceramic beads ensuring electrical isolation to produce a compact and flexible resistance heater. Suitable for operation at 2000 deg. F.

3) The resistance wire is then metallurgically bonded to a stranded nickel-copper wire to provide trouble free electrical continuity. The flexible stranded cold junction wire is connected to brass Twistlock connectors fitted with insulated sleeves. The cold junction extension leads are rated for 250 deg. C continuous temperature.

Ceramic mat heaters are efficient, time-tested, and proven heater technology in pre-weld and post weld heating, and are designed for the harsh realities of the welding environment.

For more information, contact:

Hotfoil-EHS, Inc.
2960 East State Street Ext.
Hamilton, NJ 08619
Phone # 609.588.0900
Fax # 609.588.8333
www.hotfoilehs.com

Ceramic Heater Pads for Weld Preheating and Post Weld Heat Treating

welding ceramic pad heater
Welding ceramic pad heater
(courtesy of HotfoilEHS)
The goal of preheating and post weld (PWHT) heating is to maintain temperature between weld passes and to uniformly control changes in target temperatures. By properly achieving, maintaining, and then cooling weld temperatures, you lower weld stress, distortion, reduce shrinkage stress and allow unwanted hydrogen to escape.

It is very important to understand the material characteristics of the metals being welded, and know minimum and maximum preheat temperatures, particularly in tempered steels.

For most preheating, post heat treating, and interpass heating, precise temperature control isn't required. Its more important to maintain a minimum temperature, and stay within an acceptable range during the actual welding process, as well as during cool down.

Exceptions are with tempered steels. Tempered steels have already been heat treated at the steel mill and applying too much preheat can alter that tempering. In these cases, proper set point, temperature limiting, and temperature ramp rate of the welded part is critical.

Use of Ceramic Heater Pads

Resistance heating pads are constructed of ceramic beads strung on nichrome wire. These resistance heating elements accurately raise the workpiece temperature to the proper temperature before, during, and after welding, complying with recommended preheat, interpass, and PWHT practices. These semi-flexible ceramic heater pads, with their interlocking beads and high temperature wire, allow for a fit conforming to the shape of the workpiece, and are capable of temperatures up to 1,850 degrees F. Ceramic mat (pad) heaters have an additional benefit in that they don’t have to be moved during welding.

welding temperature controls
Recorders and controls used for
welding preheat and post heat.
Electronic temperature controllers use several thermocouples spot welded to the workpiece to monitor and regulate the actual part temperature throughout the operation. Many times the electronic controllers have ramping or temperature profiling capabilities, so that heat-up and cool-down can be carefully controlled. Recorders are often used to produce a record of the temperature profiles over time before, during, and after welding. This is important when welding jobs require careful documentation.

An average application is as follows: the heater pad is wrapped around the workpiece, and insulation is applied to the weld joint and the temperature controller is set. Once preheat temperature is achieved, a welder removes the insulation and starts their work. After the weld, the ceramic heaters can be placed over the weld and the controllers can be reset for proper PWHT.

Automatic Heat Treatment Power Consoles

power console
Typical Power Console
(courtesy of HotfoilEHS)
Automatic heat treatment power consoles are used to control various heat treatment processes (i.e. pre-weld, post-weld) by closely controlling the temperature of the item being welded. The power console accurately controls the ramping rate (up and down), the soak temperature, the set point and the time. Power consoles are available from 2 to 24 zones of control. Zone can be used either in the fully automatic or manual mode.

ceramic mat heater
Ceramic Mat Heater
The power console is used to provide power to electric heating elements called ceramic mat heaters. Ceramic mat heaters are constructed of nichrome wire interwoven into ceramic beads which provides electrical insulation and protection. These heaters are quite rugged and conform to curved and irregular shapes.

Thermocouples are used to sense the target temperature and send their signal back to some type of electronic temperature controller, recorder, or combination thereof. The sophistication of the control system can range from simple manual control to fully automatic control with large graphic displays. Recorders are frequently used to document the pre-heat, soak, and post-heat process. Welding integrity depends on precise and accurate control.

Power Console Controller
Recorder used on
welding power console.
Heat treatment power consoles are built on sturdy chassis of steel and depending on ambient conditions, stainless steel. Construction includes wheels and handles for easy relocation and many electrical components for safety and convenience (such as amp meters, indicator lights, cut-off switches, fuses, and alarms).

For more information, contact:

Hotfoil-EHS, Inc.
2960 East State Street Ext.
Hamilton, NJ 08619
Phone # 609.588.0900
Fax # 609.588.8333
www.hotfoilehs.com
Email: dap@hotfoilehs.com

Ceramic Mat Heaters for Pre & Post Weld Heat Treating

ceramic mat heater
Ceramic mat heater
for pre and post weld
heat treatment.
Flexible ceramic mat heaters (also known as flexible ceramic pads or FCPs) are designed to provide stress relief for pre and post weld heat treatments for large scale welding requirements, such as those needed for piping fabrication, boilers, pressure vessels, storage tanks, pipeline construction, and mining equipment.

It's very important to pre-heat metal to a specific temperature prior to welding. Pre-heating metals reduces stress in the finished weld,  as well as eliminates moisture and improves the metallic microstructure of the weld material.  For post weld heat treatment (PWHT), use of resistance heaters to apply carefully controlled  cool-down can significantly increase the cross-weld toughness of the heat-affected zone.

Ceramic mat heaters are manufactured using high grade nickel chrome (NiCr) 80/20 wire insulated with interlocking sintered alumina ceramic beads, providing flexibility and convenience for use on curved or flat surfaces. Their design also allows for good contact and high heat transfer. Ceramic mat heaters are intended for repeated use and have considerable mechanical strength and durability. They are capable of achieving temperatures of up to 2050°F.  and are most often are supplied with ceramic insulated leads with either Camlock or Dinse type welder terminations.

The most common voltages used are 40, 60, and 80 volts (as supplied by arc welders) but many custom voltages are available. Special sizes, heating patterns and terminations are also easily accommodated with ceramic mat heaters.

For more information, contact:
Hotfoil-EHS, Inc.
2960 East State Street Ext.
Hamilton, NJ 08619
Phone # 609.588.0900
Fax # 609.588.8333
Email: dap@hotfoilehs.com

Welcome to Our Industrial Heating, Welding and Weld Pre-heating Blog

Hotfoil-EHS is committed to educating and training users of our products, namely electric hopper heating systems, electric pre and post weld heat treating, heat treating furnaces, and multi-operator welding stations.

In future posts, we hope to provide interesting information for a wide variety of applications, performance, and products for the markets we serve.

Here is a breakdown of those markets and products:

HOTFOIL
Coal and Fly Ash Hopper Heaters, Industrial Tank Heaters, Heating Cable, Silicone Heater Blankets, Control Systems.

EHS
Pre & Post Weld Heat Treating Power Consoles, Ceramic Mat Heaters, TAU Units, Temperature Recorders, Cable Sets, Brinell Testers.

AFTEK-EHS
Multi-Operator Power Supplies, Packaged Welding Systems, Single Operator Welders, GRID Systems, Custom Transformers.