General Construction and Inspection. 5. The manufacture of the cylinders must be completed with the best appliances and according to the best modern methods. All finished cylinders must show a reasonably smooth surface, and must have passed the above inspection and tests without showing any defect in workmanship or material likely to result in any appreciable weakness in the finished cylinder. Each completed cylinder must be inspected for such defects at the mill by the purchaser or his representatives before acceptance. SHIPPING CONTAINER SPECIFICATION No. 5. (See par. 38.) Iron or Steel Barrels or Drums for Inflammable Liquids (See par. 38) Mixed (Nitrating) Acids. 1. The provisions of "Shipping container specification No. 5" apply to all containers specified therein that are hereafter purchased (see par. 38), and each such container shall have plainly stamped thereon the date of manufacture thereof. 2. An iron or steel barrel or drum with a capacity of from 50 to 55 gallons must have a minimum weight in the black, exclusive of the weight of rolling hoops, of 70 pounds, and a minimum thickness of metal in any part of the completed barrel must not be less than that of full No. 16 gauge, United States standard. When the capacity of the drum or barrel is less than 30 gallons the minimum thickness of metal must not be less than No. 18 gauge, United States standard. 3. An iron or steel barrel or drum with a capacity of from 100 to 110 gallons must have a minimum weight in the black, exclusive of the rolling hoops, of not less than 130 pounds, and the minimum thickness of metal in any part of the completed barrel or drum must not be less than that of full No. 14 gauge, United States standard. 4. Each barrel or drum must stand without leaking a manufacturer's test under water by interior compressed air at a pressure of not less than 15 pounds per square inch, sustained for not less than 2 minutes, and the type of barrel or drum must be capable of standing without any serious permanent deformation and without leaking a dyrostatic test pressure of not less than 40 pounds per square inch, sustained for not less than 5 minutes. 5. When filled with water to 98 per cent. of its capacity the type of barrel or drum must also be capable of standing without leaking a test drop on its chine from a height of 4 feet upon a solid concrete foundation. 6. Bungs and other openings must be provided with secure closing devices that will not permit leakage through them. Threaded metal plugs must be close fitting. Gaskets must be made of lead, leather or other suitable material. Wooden plugs must be covered with a suitable coating and must have a driving fit into a tapered hole. The method of manufacturing the barrel or drum and the materials used must be well adapted to producing a uniform product. Leaks in a new 7. barrel or drum must not be stopped by soldering, but must be repaired by the method used in constructing the barrel or drum. Certified to Superintendent of Public Printing according to law, first insertion to be made Monday, May 27, 1912, by order of the State Corporation Commission. Richmond, Va., May 23, 1912. R. T. WILSON, Clerk. |