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THICKNESS 12 5% max under the nominal wall thickness WEIGHT +/-10% on calculated standard nominal weight HEAT TREATMENT Weld seam of the ERW pipe in Grade-B shall be heat treated after welding to a minimum temperature of 10000F [5400C] so that no untempered martensite remains

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US3637548A

a process for producing an improved melamine-formaldehyde molding composition and molded articles therefrom comprises incorporating into the standard melamineformaldehyde popcorn or molding powder from about 1 to 50 percent by weight of a cured pulverized melamineformaldehyde polymer composition based on the total weight of the molding powder formulation

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Effect of ball size and powder loading on the milling

In this figure the negative influence of the smaller ball size on the milling efficiency is drawn by an arbitrary positive slope with ball size rather than the dependency of d 4 because in an actual dynamic ball mill situation the balls already existing in the turbulent medium is moving rather than in stationary state and thus the effect of

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In a pulverizer coal is reduced in size by impact attrition and crushing to the desired degree of fineness Com- monly used grinding mechanisms include ball and race mills roll and race mills ball (tube) mills and impact (hammer) mills (12) Edwards J B Combustion The Formation and Emission of

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Pulverized coal bunker CO/O2 analyzer is an electrical instrumentation equipment designed for blast furnace coal injection system online continuous detection of gas composition Gas in the mill is sampled by instrument sampling probe installed on the mill (or mill outlet piping) Under the action of jet pump sampling gas through probe filtering

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a process for producing an improved melamine-formaldehyde molding composition and molded articles therefrom comprises incorporating into the standard melamineformaldehyde popcorn or molding powder from about 1 to 50 percent by weight of a cured pulverized melamineformaldehyde polymer composition based on the total weight of the molding powder formulation

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