induction PWHT - induction heating machine manufacturer

PWHT for Stress Relieving Using Induction Heating Systems

PWHT for Stress Relieving Using Induction Heating Systems Table of Contents PWHT for Stress Relieving Using Induction Heating Systems 1 Table of Contents 1 Introduction to PWHT for Stress Relieving Using Induction Heating Systems 2 What is Stress Relieving and Why is PWHT Necessary? 2 The Role of Post-Weld Heat Treatment (PWHT) 2 Stress Concentration … Read more

Induction Preheat Welding Systems

Portable Post Weld Heating Treatment System With Induction

Main Application:

l Preheat: weld heat,coating, spraying, bending, fitting&unfitting heat

l Post-weld heat treatment: tank, boile, pipeline, steel sheet or other metal jobs

l InductionHeat: mold heating, shipboard, zinc bath, large& irregular metal parts

l Pipeline material heat: pipeline oil, pipeline gas, pipeline water, pipeline petrochemical and other pipeline material

Main Features：

* High speed: 70%

* Low tolerance

* Energy Saving

* High efficiency

* Accurate heating

* Simple operation

* Non-contact heating

* Environmental protection

* Hypothermia circumstance

* Air cooling is suitable for low-temperature environment

* Induction heating is more uniform than oil,gas,flame heating

MYD-20KW		MYD-10KW
Input voltage	*3380V, 50/60Hz, 4 Wires**
Input Current	1~30A	1~15A
Output Current	0~300A	0~200A
Output Power	1~20KW	1~10KW, Max 15KW, 150% duty cycle
Output Frequency	5~30KHZ
Thermocouple	K type
Temperature system	Build in induction machine
Heating Temperature	Max800℃	Max500℃
Size	700 x 330 x 410 mm	650 x 310 x 410 mm
Weight	32kg	26 kg
Induction Heating coil
Length	10~20 M
Diameter	15 mm
Working temperature	-30~45℃
Pipeline Size	OD: 50~500mm or equivalent

Induction Preheating Welding Steel Pipe

Induction Preheating Welding Steel Pipe With High Frequency Heating System

Objective To preheat a steel pipe to 500ºF (260ºC) before welding.
Material Steel shaft assembly 5” to 8” OD (127-203.2mm) with a 2” (50.8mm) heat zone.
Temperature 500ºF (260ºC), if higher temperatures are required, heat time can be increased.
Frequency 60 kHz
Equipment • DW-HF-60kW induction heating system, equipped with a remote workhead containing eight 1.0 μF capacitors for a total of 8 μF.
• An induction heating coil designed and developed specifically for this application.
Process A multi-turn two position channel “C” coil, adjustable on a busbar is used to heat the desired heat zone. The coil is adjustable to fit various diameter pipes. The shaft is rotated in a fixture and heated for 3 minutes to achieve a temperature of 500ºF (260ºC).
Results/Benefits Induction heating provides:
• Preheating prevents shock to shaft which eliminates cracking in the welding phase.
• Hands-free heating that involves no operator skill for manufacturing.
• Even distribution of heating between the shank and the sleeve.