. Tentative revised boiler safety orders. ct the outstanding legs. 227 The rivets attaching angles to heads shall be spaced notover 4 in. apart. The centers of the end rivets shall be not over 3in. from the ends of the angle. The rivets through the outstandinglegs shall be spaced not over 8 in. apart; the centers of the endrivets shall be not more than 4 in. from the ends of the angles. Theends of the angles shall be considered those of the outstanding legs 62 EEPORT OF BOILER CODE COMMITTEE, and the lengths shall be such that their ends overlap a circle 3 the inner surfa
. Tentative revised boiler safety orders. ct the outstanding legs. 227 The rivets attaching angles to heads shall be spaced notover 4 in. apart. The centers of the end rivets shall be not over 3in. from the ends of the angle. The rivets through the outstandinglegs shall be spaced not over 8 in. apart; the centers of the endrivets shall be not more than 4 in. from the ends of the angles. Theends of the angles shall be considered those of the outstanding legs 62 EEPORT OF BOILER CODE COMMITTEE, and the lengths shall be such that their ends overlap a circle 3 the inner surface of the shell as shown in Fig. 18. 228 The distance from the center of the angles to the shell ofthe boiler, marked A in Fig. 18, shall not exceed the values given inTable 6, but in no case shall the leg attached to the head on the lowerangle come closer than 2 in. to the top of the tubes, 229 When segments are beyond the range specified in Table 6,the heads shall be braced or stayed in accordance with the require-ments in these Pig. 18 Stating of Head with Steel Angles in Tubular Boiler TABLE 6 .SIZES OP ANGLES REQUIRED FOR STAYING- SEGMENTS OF HEADSWith the short legs of the angles attached to the head of the boiler Height of Segment, Dimension B 30-in. Boiler 34-in. Boiler 36-in. Boiler Angle Angle Angle4x3 Angle3i^x3 Angle4x3 Angle5x3 Angle4x3 Angle5x3 Angle6x3y2 Dimen-sionA in in Fig. 18 Thick-ness,inches Thick-ness,inches Thick-ness,inches Thick-ness,inches Thick-ness,inches Thick-ness,inches Thick-ness,inches Thick-ness,inches Thick-ness,inches Fig. 18 10111213141516 % 9IS 1^% % % 1^% V2 % %% %% 6^ 7 7% 8 8% 9 9^^ NEW INSTALLATIONS, PART I, SECTION I, POWER BOILERS 63 230 Crown Bars and Girder Stays. Crown bars and girder stays for tops of combustion chambers and back connections, or wherever used, shall be proportioned to conform to the following formula: Cy<(d^y(_tMaximum allowable working pressure =-7-777—ttt—tt—ttt where W =z extreme distance betwe
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsteambo, bookyear1919
