What you've got there my friend is an ASME Section VIII unfired pressure vessel.
The data plate
I am a pressure vessel inspector at an oil refinery, I recognize the ASME "U" stamp (meaning unfired) on the left side about half way down.
The R1549 is Dallas Tank and Welding's registration number with ASME,(American Society of Mechanical Engineers) to build pressure vessels.
The vessels MAWP (maximum allowable working pressure) is 100.8 psig at 300F temperature based on the material of construction (assuming carbon steel), material thickness and vessel diameter.
That is going to make one fine BBQ!
Company History:
Trinity Industries, Incorporated, is a diversified manufacturer of heavy metal products. The company's six basic business segments comprise rail car leasing and the production of rail cars, marine products, structural metal products, pressure and non-pressure tank containers, and metal components. Trinity is a leading rail car manufacturer in the United States, controlling nearly half of the national production capacity for freight cars. Tank cars and hopper cars are leading products. Marine products such as commercial boats, barges, and offshore service vessels for the United States government make up the company's second largest business segment, generating about 17 percent of revenues. Pressure and non-pressure containers for gas and chemical storage, and structural products used in construction of highways, bridges, and buildings each account for 12 percent of revenues. Metal components such as weld fittings and container heads currently make up about eight percent of the company's sales, with the remaining five percent coming from rail car leasing operations.
Trinity Industries was formed in 1958 when the Dallas Tank Company merged with Trinity Steel Company, which made metal products for the petroleum industry; the name was changed to Trinity Industries in 1966. The company has been run by W. Ray Wallace since its first year. Wallace had joined the original Trinity Steel in the late 1940s as the company's 17th employee. After the merger, Trinity was the only publicly owned company that produced a varied line of metal products for liquefied petroleum gas (LPG). LPG, a relatively new form of fuel at that time, is used for industrial production and residential heating. Compressed natural gas and petroleum by-products can be conveniently stored and transported in specially designed tanks that permit a consumer to obtain 270 cubic feet of gas from one liquified cubic foot. As the LPG industry grew rapidly in the late 1950s and early 1960s, Trinity was the only tank manufacturer operating across a large geographical area. The company's competitors were generally smaller concerns whose markets were limited to their own regions, and Trinity, demonstrating an ability to offer consistent quality to LPG suppliers, became the industry leader.
