GI Welding and Fabrication LLC may be fairly new in name but its trusted services and level of customer satisfaction are well beyond its years. An extension of another company owned by Todd Miller, Granite Industrial Gases, GI Welding and Fabrication is also located in Derry, NH. You'll be impressed with the quality of service at GI Welding. GI Gas has been offering incredible customer service throughout NH for decades and now it's time to expect the same level of service from a sister company led by a man with a passion.