Local heat treatment units
Equipment for local and volumetric PWHT (heat treatment of welded joints)
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Steam generator PWHT
PWHT of closing joint on the head to steam generator welded joint
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Electrical furnace for PWHT
Manufactured and tested the electrical PWHT furnace control system for reactor welded joints
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Volumetric heat treatment in Eastern Siberia
Heat treatment of a ball tank with a volume of 2000 m3
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About us
we have been producing equipment for heat treatment of welds for more than 20 years
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Repair of model PT150-12 unit
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Catalogue of equipment
After receiving your request we shall immediately send you our full catalogue of equipment, consumables and spares for local heat treatment (PWHT or preheating) of welded joint.
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Our company produces the equipment for heat treatment of pipes after welding more than 20 years.
We are constantly developing in order to remain the best.
News
News archive
Volumetric heat treatment in Eastern Siberia
Volume heat treatment of the desorber
Volume heat treatment of the separator
Equipment for preheating before and during welding
Introduction of equipment for local heat treatment of welded joints
PT150-12 unit tests
Temperature field check during product heating
Delivery of heat treatment equipment to Uzbekistan
Temperature control during heat treatment
Volume heat treatment of gas splitter
Austenization of welded joints
Invertors for heat treatment
Preheating during welding at Atommash
Summing up the results of 2020
Happy New 2021 Year!
Complex heaters for heat treatment
Infrared heating
Complex for heat treatment of welded joints
We performed local heat treatment of steam generator at Atommash
Heat treatment of welded joints at Customer's object
Preheating during welding
Delivery to Uzbekistan
Beware of fakes!
COVID-19
Inventer lineup
Our partners
Heat treatment of pipelines in a temporary furnace
Heat treatment of welded joints in AEM technology
Welding with preheating
The importance of heat treatment
Heat treatment of ball tanks
Heat treatment of the drum welded joint
We expand assortment with new 9 kVA PWHT single-channel unit
Local heat treatment of column's closing joint
Furnace heat treatment
Heating and post-weld heat treatment of the pillar weld to the body
Heat treatment of reservoirs equipment
Preheating while welding during rotation
Teaching local heat treatment of welds to students
Local heat treatment by RT units
Post-welded heat treatment equipment succesfully supplied to our customers
The heat treatment of welded joints in Belarus
Heating elements for heat treatment of complex structures of welded joints
Supplement of equipment for local heat treatment of welded joints
Heat treatment of welded joints of heat exchanger's tube grids
Local heat treatment of welded joints
Education of thermal operators to perform heat treatment
Volumetric heat treatment of the column at the Moscow refinery
Education in the local heat treatment of welded joints of customer's thermal operators
Out-of-furnace volumetric heat treatment of column welded joints
New 220V inverter unit for local heat treatment of welded joints
Heat treatment of welded joints during repair of a part of the "KS" body
Consumables for heat treatment of welded joints
Heat treatment of welded joints
The supplement of equipment for local heat treatment of welded joints
Heat treatment of welded joints of the column at the Moscow refinery by the volumetric method
Heat treatment of nickel alloy products
Large electric furnace for a customer from Kazakhstan
Column at the Moscow refinery
Our equipment for local heat treatment of welded joints with the help of heating elements in work process
A working trip to the Republic of Tatarstan
Education on the test bench
Heat treatment of a complex welded joint
Education of thermal operators
Sphere tanks with a volume of 600 m3
The participation in the development process of the regulatory standard "СТО 00220368-019-2017"
We are still developing the special education of thermal operators.
Post weld heat treatment process
Heat treatment of welded joints of the heat exchanger case
Heat treatment of pipeline welded joints
Heat treatment equipment demonstration
Usefulness and safeness of the work, that are our major points, during the work. And our customer from Belarus knows that.
Another customer is equipped with our equipment
The supply of equipment for local heat treatment
Training specialists for effective work
The next order was finished successfully. One more customer appreciates the safety and efficiency work.
Supply of the heat treatment centre
Heat treatment of welded joint of boiler's utilizer high-pressure drum
Supply of heat treatment equipment set
Education of thermal operators in Kazakhstan
Equipment supply and education of thermal operators
Equipment RT series at the "Atommash" factory for annealing welded joints
The new temperature recorder is the best choice in combination with an inverter for heating welded joints.
Heat treatment of the closing welded joint of the reactor case
Individual holder for the tails of the heating elements
The new model of temperature recorder specifically for local heat treatment of welded joints
The working trip to Kazakhstan, education of thermal operators
The supply of the heat treatment set
We continue the education of thermal operators
New machine for Capacitor discharge welding of thermocouples RT-1M-mini!
Education Center successfully was opened! Education of thermal operators, on mobile units, for local heat treatment of welded joints
Heat treatment of the high-pressure welded joint metal thickness 200 mm
Heat treatment preheating before and during the welding of the heat exchanger welded joints
Education of heat treatment on a test bench of steel "P91 T91" (Russian standard)
The new model of the RT series cable rack
Heat treatment of the ending weld of the pressure compensator of the nuclear power plant
High-temperature tests of a temporary furnace for annealing welded joints
Supply of units and training of thermal operators for heating welded joints
Supply of equipment for heat treatment of welded joints in the Republic of Kazakhstan
Education of thermal operators at the nuclear station
Works in the conditions of the Far North heat treatment of welded joints of sphere tanks
Local heat treatment of sheet steel
Multichannel unit heat treatment of welded joints in the field
Local heat treatment of pipeline welded joints
Heat treatment of the thick-walled apparatus welded joint
Deploying the equipment for preheating of major welded joints
Out-of-furnace heat treatment of 8 tanks welded joints
Education of thermal operators of working with new equipment for local heat treatment of welded joints
Heat treatment of a welded joint of a thick-walled pipe
Replacing outdated equipment for heat treatment of welded joints
Heat treatment of welded joints when replacing the furnace heating coil
The volumetric out-of-furnace heat treatment of tanks welded joints for oil filtration was carried out
Heat treatment of welded joints of the tube grid
The supply of the equipment for local heat treatment of welded joints for the customer
The supply of equipment for local heat treatment of welded joints to the Republic of Belarus
The column is in work! Out-of-furnace volumetric heat treatment with high-speed diesel burners
New material! Thermal Mat for heat insulation of welded joints
Heat treatment of pipe welded joints
Heat treatment of the welded joint thick-walled columns
We continue working! Preheating and following heat treatment of the pipes of the heat exchanger tube grid
Developing the Arctic! Education of thermal operators with the delivery of the unit for the local heat treatment of welded joints
The novelty! Banding tape in the plastic unwinder for fastening heating elements during local heat treatment
Education of thermal operators to work on mobile units for local heat treatment of welded joints in Stavropol
The supply of equipment for local heat treatment of welded joints in Novy Urengoy
The number of experienced thermal operators of mobile units operators for local heat treatment of welded joints is increasing.
The facility in Tyumen is successfully completed volumetric out-of-furnace heat treatment of welded joints
The volumetric heat treatment of welded joints of the column in Tyumen continues.
The heat treatment by high-speed burner welded joints of water cooler
Volumetric heat treatment of the closing welded joints of the vacuum column
Out-of-furnace volumetric heat treatment of the column welded joints in the Kstovo is finished!
New portable single-channel inverter unit for heat treatment of welded joints
The first stage of the work on the out-of-furnace volumetric heat treatment of welded joints in Kstovo
The heat treatment of the closing welded joint of the thick-walled absorber
The "volumes" are overcome! (out-of-furnace heat treatment of welded joints)
The supply of equipment for local heat treatment of welded joints, as well as education of customer's thermal operators.
The austenization of welded joints in the Republic of Belarus
The supply of the units set for local heat treatment with heating elements for a mineral fertilizer plant
The education of thermal operators in Kazakhstan with the issuance of certificates
The usage of our units for heat treatment during the competition "100 best goods of Russia".
Another customer was equipped with the radiation heat treatment equipment.
The education of Turkish specialists in the heat treatment of welded joints with the certificate of the thermal operator issuance.
The heating of sleeve for a hot fit to the shaft using unit for local heat treatment of welded joints
The new heating element for preheating of collectors welded joints inside
The replacement of the equipment for heat treatment of welded joints
The education of thermal operators in the heat treatment rules for welded pipe joints in Kazakhstan
Heat treatment of the column welded joint with a 7200 mm diameter
The heat treatment of the rocket engine RD-180 welded joint
Robot for welding steam generator pipes joints with the using our production heating elements
The heat treatment of repair welded joints of the cement plant grinder
The heat treatment of the steam generator body bottom welded joint is no longer a problem
The out-of-furnace volumetric heat treatment of the head of a column's welded joints
The testing of the preheating technology (with the following heat treatment) during welding the pressure tubes
The heat treatment of welded joints during the welding fittings to the body of the apparatus
The work with CNIITMASH (preheating before and during the welding with a following heat treatment of the welded joints of the MCP)
Preheating of the welded joint during installing a split tee for tapping into the pipeline under pressure
Heat treatment of welded joints in a field conditions
Education of thermal operators for work with units for local heat treatment welded joints
The rental of equipment for local pipe welds (joints) heat treatment
Out-of-furnace volumetric heat treatment of apparatuses welded joints
Heat treatment of the part of the welded joint during repairing a decomposer
Heat treatment of welded joints drainage underground tanks
Preheating of welded joints before and during heat treatment on an oil platform.
Group local heat treatment of welded joints of the coil
Out-of-furnace volumetric heat treatment of the apparatus welded joints with a help of high-speed gas burners
The preheating of the welded joint during installing the repair sleeve 42 inches on the pipeline under pressure
The heat treatment of the welded joint of the NPP (nuclear power plant) deaerator
Heat treatment of the pipeline from steel "P91" (Russian standard) welded joints during installation
The heat treatment of heat exchanger fittings
The heat treatment of the turbine shaft
The austenization of a strongly bent taps
The new technology for heat exchangers!
The heat treatment of reactor
Heat treatment during installing the boiler at the Bratsk Pulp and Paperboard Mill (PPM)
The heat treatment of the column in Tuapse
The superheater heat treatment of the thermal power station
Heat treatment of complicated apparatus
Heat treatment before rolling
The supply of equipment to the new "Neftemash" plant
Preheating during welding a column in Omsk
Thick-walled welded joints
Heat treatment of steel P91 (Russian standard) collectors
Heat Treatment of Tees
Gas infrared preheating
Heat treatment by channel heating elements
The furnace control
The interesting difficult case
Out-of-furnace volumetric heat treatment
The pier
Preheating during the manufacture of "XM" (Russian standard) pipes
Far North
Education in the north
Ball valves for gas flow control
The possibility of underwater preheating has appeared
Heat treatment of T-joints
The heat treatment of the circumferential welded joint tank
The heat treatment of the propeller screw
Preheating before and during the following heat treatment
The prehearing during rotation
Local post-weld heat treatment of pipe welded joints
The characteristic signs of using an arc welding are the heterogeneity of metall structure, welded joint and heat-affected zone (HAZ) properties as well as welding stress presence, which appear immediately after the welding process.
Ununiform structure and properties of welded joint appear as the result of uneven heating. At the time, when the metal melts during the welding process, it reaches a temperature of 2000°C, while the surrounding metal layers are not so hot, so they retain a solid structure. Because of this, the strength of the welded joint often exceeds the strength of the other metal.
An area of metal arises along the welded joint and reaches a high temperature and then cools to the surrounding temperature during the process of welding. This area is called the heat-affected zone (HAZ).
All metals shrink with temperature drop. Cold metal layers confront the process in the area of welding joint and HAZ. As a consequence, it makes welding stress. Welding stresses can reach significant values close to the yield strength (250-350 MPa). Welding stresses are dangerous because they can cause cracks in welded joints, especially from alloyed steels. In addition steels cool quickly during the process of welding under production conditions, which leads to the formation of hardening structures in the welded joint and HAZ. It also contributes to the appearance of cracks. At high welded stress, a special type of destruction in the presence of certain chemicals can occur - stress corrosion cracking (SCC). For example, very low chloride concentrations can seriously affect usually resistant stainless steels.
Another problem is hydrogen. If there is water in the welding zone, it may appear under an electric arc. Water will be decomposed into oxygen and hydrogen, which will fall into the melted metal. The presence of hydrogen can lead to serious welding problems.
One of the main ways of solving these problems and increasing the reliability of welded joints is heating or post weld heat treatment (PWHT), as a result of which the level of welding stresses is reduced, the structure and properties of the joint metals are improved, and hydrogen is removed.
- Preheating before welding;
- Preheating during welding;
- Post weld heat treatment.
- Thermal rest (heat recovery);
- Stress relieving;
- Normalising;
- Annealing;
- Austenization.
The benefits of working with us
Experience
Portfolio
Austenization of welded joints
The heat treatment of the steam generator body bottom welded joint
The heat treatment of the rocket engine RD-180 welded joint
The new heating element for preheating of collectors welded joints inside
The heating of sleeve for a hot fit to the shaft using unit for local heat treatment of welded joints
The austenization of welded joints in the Republic of Belarus
The heat treatment of the closing welded joint of the thick-walled absorber
Out-of-furnace volumetric heat treatment of the column welded joints in the Kstovo is finished
Volumetric heat treatment of the closing welded joints of the vacuum column
The facility in Tyumen is successfully completed volumetric out-of-furnace heat treatment of welded joints
Heat treatment of the welded joint thick-walled columns
Heat treatment of the closing welded joint of the reactor case
Heat treatment of welded joint of boiler's utilizer high-pressure drum
Heat treatment of welded joints of the heat exchanger case
Post weld heat treatment process
The prehearing during rotation
The heat treatment of the propeller screw
The possibility of underwater preheating has appeared
The furnace control
Heat treatment by channel heating elements
Gas infrared preheating
Heat treatment of steel P91 (Russian standard) collectors
Preheating during welding a column in Omsk
The heat treatment of the turbine shaft
The heat treatment of the welded joint of the NPP (nuclear power plant) deaerator
The preheating of the welded joint during installing the repair sleeve 42 inches on the pipeline under pressure
Group local heat treatment of welded joints of the coil
The volumetric heat treatment of welded joints of the column in Tyumen continues
The column is in work! Out-of-furnace volumetric heat treatment with high-speed diesel burners
Heat treatment of the ending weld of the pressure compensator of the nuclear power plant
Heat treatment preheating before and during the welding of the heat exchanger welded joints
Sphere tanks with a volume of 600 m3
Contact Information
Working hours:
from 9:00 till 17:30
(Moscow time, UTC-3)
Days off: Saturday, Sunday
Email:
Address:
400066 Volgograd, Donetskaya str., 16
© 2023
GC Repair Technologies Ltd.
All rights reserved
Unauthorised copiyng is prohibited
GC Repair Technologies Ltd.
All rights reserved
Unauthorised copiyng is prohibited
The presented information is given only for information purposes and can not be considered as public offer.
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