Original oil and gas trade magazine vintage ad for THE LINDE AIR PRODUCTS COMPANY of New York City, NY. A Division of Union Carbide and Carbon Corporation. Eliminate Backing Rings in Stainless Steel Piping with Heliarc Welding. Pictured is Argon gas being used as a backing agent replacing backing rings. Unique 1955 old oilfield petroleum pipe industry magazine advertisement. On the reverse side is an ad for BETHLEHEM SUPPLY COMPANY of Tulsa, OK. Around the Lease, Around the Rig, Beth-Co-Weld's Your Best Bet. Beth-Co-Weld is stocked throughout the oil fields by the network of Bethlehem Supply stores. Unique 1955 old oilfield petroleum industry equipment magazine advertisement.