. Tentative revised boiler safety orders. er ofthe tube. For other tubes the flange test is not required. I In making the flange test, the flaring tool and die block asshown in Fig. 7, may be used. 168 Flattening Tests. A test specimen 3 in. in length shallstand flattening between two parallel plates until the distancebetween the plates is not over five times the wall thickness, withoutshowing cracks or flaws. In the case of lapwelded tubes, the test NEW INSTALLATIONS, PART I, SECTION I, POWER BOILERS 41 shall be made with the weld at the point of maximum bend. 169 Hydrostatic Tests. Tubes und
. Tentative revised boiler safety orders. er ofthe tube. For other tubes the flange test is not required. I In making the flange test, the flaring tool and die block asshown in Fig. 7, may be used. 168 Flattening Tests. A test specimen 3 in. in length shallstand flattening between two parallel plates until the distancebetween the plates is not over five times the wall thickness, withoutshowing cracks or flaws. In the case of lapwelded tubes, the test NEW INSTALLATIONS, PART I, SECTION I, POWER BOILERS 41 shall be made with the weld at the point of maximum bend. 169 Hydrostatic Tests. Tubes under 5 in. in diameter shallstand an internal hydrostatic pressure of 1000 lb. per sq. in. andtubes 5 in. in diameter or over, an internal hydrostatic pressure of800 lb. per sq. in., provided the fibre stress corresponding to thesepressures does not exceed 16,000 lb. per sq. in. Should the fibre stress corresponding to these pressures exceed16,000 lb. per sq. in., the test pressure shall be determined by thefollowing formula: 32000 t P = D. FLARING TOOLA = Dlam. of Tube less §B - >* •» •» §Q ~ » » / p/us ^ Position offer using f/erring Tool^v Position after using^^^srmn/iu flatter
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsteambo, bookyear1919
