(b) Clincher-built boats are to have filling pieces for about one-third of the boat's length amidships, fitted to the projecting plank edges from the gunwale to the bilge. (c) In all boats intended to accommodate more than 60 persons, vertical fenders extending from the gunwale down to the bilge, are to be fitted to facilitate launching on the high side of a listed ship. These fenders are to be sufficient in number to prevent damage to the boats when being lowered. If the fenders are of wood they are to have cope iron fitted to the outside edges. (d) Particulars of any proposed arrangements, including alternatives such as skates or rollers temporarily secured to the boat to prevent it from being damaged, and to facilitate launching, are to be submitted for the Board's approval. (e) When the bilge keels are fitted, they shall be secured to a doubling plank well fastened to the bottom planking and timbers by brass screws. Bilge keel fastenings shall not penetrate the bottom planking. Suitable hand grips shall be made in the bilge keels for use in event of capsizing. (R.S. 4405, 4417a, amended; 46 U.S.C. 375, 391a) [As added by Order 186, Dec. 22, 1941; 6 F.R. 6705] as NOTE: The former § 37.3-9 was redesignated as § 37.3-10, and the former § 37.3-10 was revoked by Order 186, Dec. 22, 1941; 6 F.R. 6705. § 37.3-10 Fastenings-TB/ALL. NOTE: The former § 37.3-10 was revoked, and the former § 37.3-9 was redesignated as §37.3-10 by Order 186, Dec. 22, 1941; 6 F.R. 6705. § 37.3-11 Air tanks-TB/ALL. (a) All lifeboats contracted for after September 30, 1912, shall have not more than 50 percent of the air-tank capacity in the ends of the boat and the remaining capacity shall be located in the side tanks. (b) After June 20, 1912, the air tanks of all lifeboats shall be entirely independent of the hull or other construction and shall be of suitable noncorrosive material and of a capacity of not less than 1.5 cubic feet for each person allowed in metallic boats and not less than 1 cubic foot for each person allowed in wooden boats: Provided, That in all metallic boats constructed and inspected on and after March 1, 1931, there shall be at least 1 cubic foot for each person allowed in addition to sufficient air-tank capacity to float the boat (including its equipment), when filled with water. Such air tanks shall be firmly and securely fastened in the hull, and in such manner as will allow them to be temporarily removed, and in no case shall the tanks be punctured or opened for such fastenings. The tops of such tanks shall be thoroughly protected by a grating or platform or by the thwarts or seats. Such air tanks of 6 cubic feet or less shall be constructed of material of a thickness not less than No. 22 B. W. G.; from 6 cubic feet to and including 15 cubic feet, of a thickness not less than No. 20 B. W. G.; and all air tanks of more than 15 cubic feet capacity shall be of a thickness not less than No. 18 B. W. G. (c) All joints of air tanks shall be properly double riveted and tightly calked or securely hook-jointed and efficiently soldered or properly and securely welded, and such air tanks shall be located in such a manner that will permit the lifeboat to be on as near an even keel as possible when flooded with water. (d) The cubical contents of air space of air tank shall be stamped on the tank where same can be seen when air tank is placed in boat. (e) All air tanks shall be fitted with a connection of one-half inch outside diameter for testing purposes. (f) Before any lifeboat is passed and accepted, the air tanks thereof shall be tested in the presence of an inspector of this Bureau by an air pressure of not more than 1 pound to the square inch. (R.S. 4405, 4417a, as amended; 46 U.S.C. 375, 391a) [As added by Order 186, Dec. 22, 1941; 6 F.R. 6705] (d) A life raft carried on tank vessels navigating the oceans or coastwise should have a deck area of not less than 4 square feet for each person whom it can accommodate, and the platform should be not less than 6 inches from the water level when the raft is loaded. [As amended by Order 186, Dec. 22, 1941; 6 F.R. 6705] (e) A life raft carried on tank vessels navigating the Great Lakes, bays, sounds, and lakes other than the Great Lakes, should have a deck area of not less than 3 square feet for each person whom it can accommodate. [As added by Order 186, Dec. 22, 1941; 6 F.R. 6705] (f) A life raft carried on tank vessels navigating the rivers exclusively should have a deck area of not less than 2.5 square feet for each person whom it can accommodate. [As added by Order 186, Dec. 22, 1941; 6 F.R. 6705] * NOTE: $37.4-4 was amended by amending paragraph (d), redesignating paragraph (e) as (g), and adding new paragraphs (e) and (f), by Order 186, Dec. 22, 1941; 6 F.R. 6705. CARRYING CAPACITY OF LIFEBOATS AND LIFE RAFTS § 37.5-1 Capacity of open boats. NOTE: $37.5-1 was amended by revoking paragraph (k), and relettering (1)-(0) as (k)-(n), by Order 186, Dec. 22, 1941; 6 F.R. 6705. § 37.5-2 Capacity of life raftsTB/ALL. (b) For every person carried, there shall be not less than 3 cubic feet of air cases or equivalent buoyancy; and for a life raft carried on tank vessels navigating the oceans or coastwise there shall be a deck area of not less than 4 square feet for each person whom it can accommodate, and the platform should be not less than 6 inches above the water level when the raft is loaded; for a life raft carried on tank vessels navigating the Great Lakes, bays, sounds, and lakes other than the Great Lakes, § 37.7-5 Inspection-TB/ALL. For each lot of 250 life preservers, the manufacturer shall submit to the local inspectors of the district in which manufactured an affidavit setting forth the material with which the life preservers are filled and that the life preservers meet in every respect the requirements of the General Rules and Regulations of the Board of Supervising Inspectors. Every life preserver meeting the above requirements shall be inspected by an inspector of this Bureau and stamped with his initials and the date of inspection. (R.S. 4405, 4417a, as amended; 46 U.S.C. 375, 391a) [As amended by Order 186, Dec. 22, 1941; 6 F.R. 6706] LINE-THROWING GUN § 37.10-1 Muzzle-loading gun-T/OC. The muzzle-loading type of gun shall be of steel or of bronze not less than 20 inches long, 21⁄2 inches smooth bore, and weigh with its carriage not more than 200 pounds. It shall have a primer hole fitted in the upper wall. On guns manufactured after March 31, 1941, the primer hole shall be drilled into the gun barrel § 38.1-1 Requirements for construction-TB/ALL. (a) Cargo tanks shall be constructed and tested in accordance with the requirements of Parts 50 to 57, inclusive, as amended, for Class 2 unfired pressure vessels of welded construction. (b) Each cargo tank shall be inspected and tested to determine its maximum safe working pressure and shall be certified for stowage of any liquefied inflammable gases having a vapor pressure (gauge pressure) at 115° F. not exceeding that working pressure. and protected against burring by a taper countersink extending into the barrel to a depth of one-eighth of an inch. The outside diameter of the countersink shall be five-eighths of an inch plus or minus one-sixteenth of an inch. The use of core supporting pins extending into the wall of the gun is not permitted. The gun shall be mounted in a carriage on trunnions or other suitable mechanism so as to permit of elevation up to 35 degrees. The carriage may be of wood, reinforced with metal or recesses properly spaced to receive the gun trunnions or other supporting mechanisms. These recesses or seats shall be fitted with detachable trunnion cap squares or a similar device to permit easy mounting and dismounting of the gun. The carriage shall be so constructed that the gun may be secured in elevation. Rings, eyebolts, or other efficient device shall be fitted to the carriage for securing it in position for firing. (R.S. 4405, 4417a, 4488, 4491, as amended; 46 U.S.C. 375, 391a, 481, 489) [As amended by Order 84, Mar. 10, 1941; 6 F.R. 1401] §37.10-5 Signal pistol-T/OC. CL-Class. GR-Grade. TP-Test pressure. SWP-Safe working pressure. CAP-Capacity water gals. U. S. (b) In addition to the marking described above, the following inscription shall be placed on the housing protecting the filling line at the tank: "Cargo having a vapor pressure exceeding pounds per square inch gauge at 115° F. temperature shall not be loaded into this tank." This inscription may be stenciled on the protective housing or a corrosionresisting plate containing this data may be securely attached thereon. This inscription shall be legible at all times. § 38.2-1 Valves and accessoriesTB/ALL. (a) All connections to tanks shall have approved shut-off valves located as close to the tank as practicable, except safety relief connections and gauging devices. (b) Excess flow valves where required by the regulations in this part shall be designed to close automatically and shut off the gas or liquid flow in case: (1) The flow through the valve exceeds a predetermined rate, which flow must be less than the pipe line capacity to and from such excess flow valve. (2) The pressure on the inlet side of excess flow valve exceeds by a certain designed number of pounds per sq. in. the pressure in pounds on the outlet of such valve. (c) Excess flow valves may be designed with a by-pass, not to exceed a No. 60 drill size opening to allow equalization of pressure. (d) Excess flow and back-pressure check valves where required by the regulations in this part, shall be located on the inside of the tank or at a point outside where the line enters the tank; in the latter case, installations shall be made in such manner that any undue strain beyond the excess flow or backpressure check valve will not cause breakage between the tank and such valve. §38.2-2 Installations excess flow and back-pressure check valves-TB/ALL. (a) Discharge outlets shall be provided with an approved automatic excess flow valve. (b) Filling connections shall be provided with an approved back-pressure check valve. (c) All other connections to tanks except safety relief valve and gauging devices described in § 38.5-1 (c), shall be equipped with approved automatic excess flow valves. § 38.3-1 Piping and fittings—TB/ALL. (a) All pipe connections shall be confined to the smallest area practicable and shall be located at highest practicable points on the tank. (b) Each tank shall have all valves, fittings, accessories, safety devices, gauging devices and the like suitably protected against mechanical damage. (c) Valves, regulating, gauging, and other tank accessory equipment on unmanned barges shall be protected against tampering. (d) All tank inlets and outlets, except relief valves and gauging devices, shall be marked to designate whether they communicate with vapor or liquid space. § 38.4-1 Safety devices-TB/ALL. (a) Every tank shall be provided with one or more approved relief valves of spring-loaded type. These valves shall be arranged to discharge into a ventheader system. (b) Relief valves shall be set to open at a pressure not in excess of the maximum safe working pressure, and their discharge areas shall be not less than those shown in the following Table 1: TABLE 1.-Required sizes of relief valves for cargo tanks [NOTE: D-Outside diameter of tank in feet and fractions thereof, U=overall length of tank in feet and fractions thereof) Where (DX U): Does not exceed 60... 100 lb. 125 lb. 150 lb. 175 lb. 200 lb. min. min. min. min. 1.90 1.57 1.25 1.06 0.94 0.83 2.50 2.06 1.68 1.43 1.25 1. 10 3.15 2.60 2.13 1.81 1.58 1.40 3.80 3.14 2.48 2.10 1.87 1.65 4.45 3.68 2.90 2.46 2. 15 1.90 5.10 4.21 3.33 2.83 2.43 2.15 5.80 4.79 3.55 3.09 2.72 2.40 6.05 5.00 3.77 3.20 2.83 2.50 6.30 5.21 3.93 3.33 2.94 2.60 6.55 5.41 4.09 3.47 3.06 2.70 6.80 5.62 4.25 3.61 3.17 2.80 7.05 5.82 4.41 3.74 3.28 2.90 7.30 6.03 4.57 3.88 3.40 3.00 7.55 6.24 4.73 4.02 3.51 3.10 TABLE 1.-Required sizes of relief valves for cargo tanks-Continued [NOTE: D=Outside diameter of tank in feet and fractions thereof, U=overall length of tank in feet and fractions thereof] Is greater than 340 but not more than 360. 1 A Where A area of safety valve: sq. in. To be calculated using Fetterly's formula 1 as promulgated by Bureau of Explosives, New York City, using 1,000° F. (11) instead of 1,200° F. B-the diameter of the inside wall of insulation in feet the outside diameter of metal container. U=the length of the container in feet. E-the area of end of container in square feet; under certain conditions the area of one or both ends may be omitted, depending on the probability of exposure to the temperatures for which the relief dimensions of the valve are calculated. C-the heat transfer in B. T. U. per square foot per hour per degree Fahr. temperature difference between the temperature at the outside of the insulation and the temperature of the contents of the container when at the pressure at which the safety valve is set to open. -the temperature in degrees Fahr. at outside surface of insulation 1.000 degrees. 13=the temperature in degrees Fahr. of contents of container when at the pressure at which the safety valve is set to open. W the density of steam in pounds per cubic foot at pressure P. W1=the density of gas vapor in pounds per cubic foot at pressure P. N=the lift of the valve in inches=0.05. P=the absolute pressure in pounds per square inch. P-14.7-the gauge pressure at which the safety valve is set to open. L=the latent heat of vaporization of the liquid portion of the gas in B. T. U, per pound in weight at the pressure P. (c) Relief valves shall have direct communication with the vapor space of the loaded tank. No shut-off valve shall be installed between the tank and relief valve, except that manifolds for mounting multiple relief valves may be fitted with approved interlocking shut-off cocks or valves so arranged as to afford, at all times, the full required capacity flow through the relief valves not shut off. (d) Each tank relief valve shall be plainly and permanently marked with name or trade mark of manufacturer, the pressure in pounds per sq. in. gauge at which the valve is set to start to discharge, and the actual free discharge area in sq. in. of the valve at its full open position. § 38.5-1 Liquid level gauging devicesTB/ALL. (a) Approved gauging devices shall be employed on all tanks to indicate the maximum level to which the tanks may be filled with liquid at temperatures between 20° F. and 130° F. (b) Visible type gauge glass shall not be permitted. (c) Gauging devices of the rotary tube, fixed tube, slip tube, or magnetic type, may be used without installation of an excess flow valve provided the bleed valve opening is not larger than a No. 54 drill size. (d) The term "fixed tube gauging device" is applied to a permanently attached tube extending into a tank a predetermined distance for the purpose of indicating the maximum level to which the tank may be filled. The tube shall be installed in the center of the tank top and its length shall be meas |