Beautiful certificate from the Spiral Weld Tube Company issued in 1890. This historic document was printed by Maverick & Wissinger Company and has an ornate border around it with a vignette of the company name on a Spiral Weld Tube. This item has the signatures of the Company's President, James C, Bayles and Treasurer, George C, Hallett and is over 119 years old. The certificate was issued to L. C. Hopkins and is endorsed by him on the verso.
Certificate Vignette Exhibition ... By Massachusetts Charitable Mechanic Association, Boston 1887 Spiral Weld Steel Tubes, manufactured by "The Spiral Weld Tube Co.," East Orange, N. J.--This company exhibit several lengths of spiral weld steel tubes of sizes varying from six inches to twenty inches in diameter, together with flanges, bub and spigot ends, sleeves, and other fittings. These tubes are made of a strip of steel plate, which for the smaller sizes is twelve inches wide, and for the larger sizes eighteen inches wide. The strips are rolled spirally, with edges overlapping, and the seam welded, this work being done by special machinery. The spiral earn being much stronger than the longitudinal seam of ordinary pipes, this form of pipe, of a given diameter and strength, can be made of proportionately lighter material, and the saving of weight thus secured is the main claim for merit which the new pipe possesses. Its weight is about one third that of wrought- iron pipe, and one eighth that of cast-iron pipe of the same sizes and strength. This difference in weight gives it great advantage in the matter of transportation and handling, and adapts it for use where the weight of the ordinary pipe would be objectionable. This pipe can be employed for all purposes for which the ordinary cast or wrought iron pipe is used, being suitable for conveying steam under pressure, liquids, or gases. It is made of different thicknesses of plates, according to the class of service required. For underground work, it is coated with aapbaltum. The methods of its manufacture permit it to be put on the market at a leas price than that of ordinary pipes. The prices for the smaller sizes vary but little from those of ordinary pipe, bnt on sizes of ten inches diameter, and over, they are lean than one half those of ordinary pipe. The pipe is readily cut to required length*, and the flanges, hub or spigot ends, fitted on. The sections are thus connected together with the tools usually at hand In such work.