Are you looking for Heat Treatment equipment prior to Welding? Read this Blog on Why Pre-Heat?
British Stork Cooperheat designs, manufactures and supplies quality on-site heat treatment equipment and furnaces including Pre-Heat equipment prior to welding.
With over 50 years experience in the field of heat treatment, they produce a full range of specialised thermal equipment including multi-channel modules, compact heat treatment units, data recorders, remote control programmers, panel burners, consumables, spares and accessories.
Heat Treatment Furnaces & Ovens are sold to a range of sectors including oil and gas, power, chemical, heavy fabrication, forging, foundry and any other industry where heating processes are required with the needs of the operator and industry in mind.
We supply pre-used and refurbished Stock Cooperheat pre-heat equipment.
Why is preheat sometimes required before welding?
Preheating the steel to be welded slows the cooling rate in the weld area. This may be necessary to avoid cracking of the weld metal or heat affected zone. The need for preheat increases with steel thickness, weld restraint, the carbon/alloy content of the steel, and the diffusible hydrogen of the weld metal. Preheat is commonly applied with fuel gas torches or electrical resistance heaters.
The purpose of preheat
1.Reduce the risk of hydrogen cracking
2.Reduce the hardness of the weld heat affected zone
3.Reduce shrinkage stresses during cooling and improve the distribution of residual stresses.
If preheat is locally applied it must extend to at least 75mm from the weld location and be preferably measured on the opposite face to the one being welded.
Stork Cooperheat are one manufacturer of pre-heat welding systems with over 50 years experience in the field of heat treatment, they produce a full range of specialised thermal equipment including multi-channel modules, compact heat treatment units, data recorders, remote control programmers, panel burners, consumables, spares and accessories.
Heat treatment of welded joints
Heat treatment is an operation that is both time consuming and costly. It can affect the strength and toughness of a welded joint, its corrosion resistance and the level of residual stress but is also a mandatory operation specified in many application codes and standards. In addition it is an essential variable in welding procedure qualification specifications.
Before discussing the range of heat treatments that a metal may be subjected to, there is a need to clearly define what is meant by the various terms used to describe the range of heat treatments that may be applied to a welded joint. Such terms are often used incorrectly, particularly by non-specialists; for a metallurgist they have very precise meanings
if you have any questions about Stork Cooperheat or pre-heat, post heat treament equipment, please get in touch.
