Global Supply Line (GSL) is a supplier and distributor of valves, pipelines, and oilfield products. It offers cast and forged valves such as ball, butterfly, control, check, diaphragm, globe, gate, needle, and plug, as well as strainers, studs, gaskets, solenoids, positioners, gearboxes quarter turn and multi-turn, flanges, and other products. The company caters to oil and gas, petrochemical, chemical, power generation, mining, and other industries.