Hello today is 6 “SCH80 field welding method. It is not such a difficult point. If a weak wind blows into the pipe, the flow of air is amplified. Be sure to check that the pipe end is not blocked by the wind before welding. Also, make sure your windshield is well installed on the windy day. Before welding, it is necessary to check if there is any cleaning condition, scratch, HI-LOW or other foreign matter inside the pipe. In such a cloudy day, winter season, large pipe, thick pipe, etc. Preheating should remove moisture before welding Now that you have checked the basic checks before welding, you can start welding. I installed a windshield only half the wind. It is up to you to decide how to install it according to field situation, weather, field conditions. You do not have to install it on windless days. Suddenly a strong wind blew, and a blowhole occurred, which stopped the welding. This is often the case in the field, so do not panic at all. Please check if the root path is well formed. Keyhole welding ….. Thank you for watching.