Founded in 1888 as the Darling Pump & Mfg. Co. Ltd., the company was organized to manufacture and sell Darling oil well pumps and supplies and engage in the business of general brass founding and machining. Having been born into the rapidly developing petroleum industry, the company’s product line was soon expanded to include gate valves for well control, flow-line, and pipe-line use.
http://www.acipco.org/afc/aboutus.cfm
American Steel Pipe is produced in a size range of 10-3/4« through 24 » diameter, in lengths up to 100 feet and in API grades B through X-80. American Steel Pipe has many applications including high pressure oil and gas transmission lines, distribution main lines, offshore gathering systems, steel pipe pilings, abrasive-resistance pipe, HIC resistant pipe for sour service, dredge pipe, and product pipelines. The pipe meets or exceeds electric weld specifications set forth by the American Petroleum Institute. American Steel Pipe holds API Certificate No. 5L-0126 for Line Pipe and is BS EN ISO 9001:2000 certified.
http://www.acipco.com/steel/aboutus.cfm