Pakistan Oxygen Ltd. engages in the supply and distribution of gases and provision of engineering services. It operates through the Industrial, Medical, and Other Gases; and Welding and Others segments. The Industrial, Medical, and Other Gases segment covers business with large-scale industrial customers, typically in the oil, chemical, food and beverage, metals, glass sectors, and medical customers in the healthcare sector. The Welding and Others segment sells welding electrodes, packaged chemicals, and a range of associated equipment. The firm serves the aircraft, automotive, chemicals, water and wastewater treatment, welding and metal fabrication, energy, food and beverage, glass, healthcare, and hygiene industries. The company was founded in 1949 and is headquartered in Karachi, Pakistan.