Original oil and gas trade magazine vintage ad for NATIONAL CYLINDER GAS COMPANY. Main office was located in Louisville, Kentucky. Engineered for endurance. The Tube-Turn Welding Neck Flange is the preferred choice for most severe piping services, resulting from high pressures, temperature extremes, or numerous fluctuations of substantial amount of either temperature or pressure or both. Your problems solved by Tube Turns Engineering Service. This unique 1954 old oilfield petroleum piping equipment magazine advertisement would display beautifully matted and framed. Nice graphics. Two sided advertisement (front and back).