DW series reels are specially developed for the needs of double-tube gas welding, and can transport oxygen, acetylene or oxygen, propane and other commonly used welding combination gases. The reel is made of carbon steel as a whole, powder coated, spring driven, automatic retract hose, instant locking of the required tubing length, and the construction is sturdy and durable. The intensive management of the long gas welded double pipe using reel greatly improves the working environment, improves the cleanliness of the site, thereby improving the production efficiency, and is of great help to assist the 5S literacy management of the factory.