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Welding hoses are flexible hollow tubes used to transfer different types of gases like LPG, oxygen, and acetylene into welding torches. These hoses are designed to be durable, light, non-porous, flexible enough for torch maneuverability, and can withstand high internal pressures. Welding hoses are color-coded depending on the gas it carries for safety and visual referencing during welding. Generally, blue hoses are used for oxygen, orange hoses for LPG, black hoses for shielding gases, and red hoses as fuel gas line. These welding hoses are available in varying lengths of single or twin hose lines.