1. Heating equipment: 1 PH-80 device

2. Environmental temperature: 22.4 ℃

3. Operating conditions: Plate thickness of 44mm, diameter of 5.1 meters, inner ring welding for 45 minutes (80kW) for testing, the following results were obtained:

After heating for 12 minutes, point A has passed the welding point, and insulation cotton is wrapped around the outside of the cylinder. The equipment is rotated once (45 minutes) and moved to the next opening. The total power consumption for heating one circle is 36KW * H (electricity cost 0.55 yuan/kWh, total electricity cost 18.8 yuan per circle). A total of 11 welding joints in the entire pipe section require 396KW * H, with a total cost of 217.8 yuan.

4. on-site photos

5. First cycle power consumption