Hamedsoft Engineering Company

Hamedsoft Engineering Group

Heat treatment and Advanced NDT

Also manufactures of thermal equipment in numerous industries including power generation, oil and gas industries.

Any kind of heat treatment on any kind of shapes, like Spherical tanks, Towers, Raactors, Pipeline, ...
Advanced NDT services on Headerboxes, Storage Tanks or other metal products.
Produce, Maintenance, Upgrade the PWHT and heat treatment machines.
The most powerfull company for PWHT on spherical tanks.

years of experiences

Happy Clients

167

Successfull projects

PWHT and Advanced NDT

Latest Projects

Alay mahestan petrochemical complex

Kangaan - Iran

Our specific servicesا

Usually ask us

Main Consequences of Not Preheating in Welding

Weld cracking: severe temperature differences between the weld zone and the base metal create tensile stresses and longitudinal, transverse, or subsurface cracks. Excessive hardness: especially in carbon and alloy steels, the HAZ becomes too hard and brittle. Lack of penetration: because the metal is cold, the molten pool solidifies too quickly and adequate penetration is not achieved. Porosity: gases do not have time to escape and become trapped in the weld. Distortion: contraction and expansion differences cause bending and deformation of the part. Hydrogen embrittlement: in high-carbon steels, lack of preheating causes hydrogen accumulation and cold cracking.

Hamed Changizi

CEO

How Does the Number of Elements Affect PAUT Results?

The number of elements is one of the most important specifications of a PAUT probe and directly affects scan quality, focusing power, and inspection speed. These effects include improved beam focus, better image quality, wider scan range, and flexibility in designing focal laws. A higher number of elements enables focusing at different depths, beam steering, and more complex scan execution.

Hamid Mohammadi

QC - QA

What Factors Affect PAUT Probe Selection?

1. Material type (carbon steel, stainless steel, aluminum, composite materials) 2. Part thickness 3. Expected type of defect 4. Type of inspection (weld inspection, corrosion, forged parts, cast parts)

Hamid Mohammadi

QC - QA

Is a Higher Number of Elements Always Better in PAUT?

No. A higher number of elements usually offers technical advantages, but the probe and equipment cost is higher, the amount of data increases, and not all devices support probes with a large number of elements.

Hamid Mohammadi

QC - QA

How Does Phased Array Work?

In this method, instead of using a single ultrasonic crystal (conventional ultrasonic testing), an array of small elements is used. By controlling the pulse timing sent to each element, the device can change the beam angle, scan the beam without mechanical movement, and focus at different depths.

Hamid Mohammadi

QC - QA

The Importance of Preheating

If preheating is not done before welding, the most important consequence is increased thermal stresses and the formation of severe weld defects. In short: cold metal cannot withstand thermal shock and will crack.