Find the most up-to-date version of ASTM E at Engineering ASTM E() [ Withdrawn ]. Standard Test Method for Gross Calorific Value of Refuse-Derived Fuel by the Bomb Calorimeter. Designation: E – 87 (Reapproved ) Standard Test Method for. Gross Calorific Value of Refuse-Derived Fuel by the Bomb Calorimeter1 This standard.
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The laboratory sample must be air-dried and particle size reduced to pass a 0. Aztm crystals shall be asttm before use. The calorific value is computed from temperature observations made before and after combustion, taking proper allowance for thermometer and thermochemical corrections.
Observations, Adiabatic Jacket Method – Assemble the calorimeter in the jacket and start the stirrer. Determine the sulfur content of the sample by any of the procedures described in Test Methods E The oxygen supply cylinder should be equipped with an approved type of safety device, such as a reducing valve, in addition to the needle valve and pressure gauge used in regulating the oxygen feed to the bomb.
Do not record time intervals since they are not critical in the adiabatic method. Firing wire ast be mm of No. Thermometers – Temperatures in the calorimeter and jacket shall be measured with the following thermometer or combinations thereof:.
ISO — International Standards. Allow 5 min for attainment of equilibrium; then record the calorimeter temperatures at 1min intervals for 5 min.
ASTM E – 87 Gross Calorific Calorimeter – PDF Free Download
Remember me Forgot password? Calculated from data in National Bureau of Standards Circular Suitable reducing valves and adapters for 2 to 3. Notify me of follow-up comments by email. Karl Gross juegos teorias. These thermometers shall be tested for accuracy against a known standard preferably by the 7e11 Bureau of Standards at intervals no greater than 2.
ASTM E (Re-approved ) – International Standards
Fire the charge at the start of the sixth minute and record the time and temperature. Test Room – The apparatus should be operated in a room or area free of drafts that can be kept at a reasonably uniform temperature and humidity for the time required for the determination.
Oxygen manufactured from liquid air, guaranteed to be greater than Valves, gauges, and gaskets must meet industry safety codes.
The buret used for the HNO3 titration shall be of such accuracy that estimations to 0. Commercially prepared pellets may be used provided they are made from National Bureau of Standards benzoic acid. The maximum difference between any two test points shall not be more than 0. Sorry, your blog cannot share posts by email. The crystals shall be pelleted before use. Before adding this water, rinse the bomb, and drain the excess water, and leave undried.
The value of heat of combustion of benzoic acid, for use in the calibration calculations, shall be in accordance with the value listed in the National Bureau of Standards certificate issued with the standard. Examine the bomb interior and discard the test if unburned sample or sooty deposits are found. Weights are measured in grams.
ASTM E711-87 (Re-approved 2004) – International Standards
A more dilute standard solution may be used for higher d711. It is equivalent to the heat produced by combustion of a unit quantity of solid fuel at a constant pressure of one atmosphere, under the assumption that all water in the products remains ee711 the form of vapor. A step-down transformer connected to an alternating current lighting circuit or batteries may be used.
The following precautions are recommended for safe calorimeter operation: Sample Holder – Samples shall be burned in an open crucible of platinum, quartz, or acceptable base-metal alloy.
ASTM E711 – 87 Gross Calorific Calorimeter
Caution – The ignition circuit switch shall be of momentary double-contact type, normally open, except when held closed by the operator. Gross Income Philippine taxation gross income. Lp Gross Hematuri 1Deskripsi lengkap. Observations, Isothermal Jacket Method – Assemble the calorimeter in the jacket and atsm the stirrer. This pressure must remain the same for each calibration and for each calorific determination.
The immersed portion of the stirrer shall be coupled to the outside through a material of low heat conductivity. After the rapid-rise period about 4 to 5 minrecord temperatures at 1-min intervals on the minute until the difference between successive readings has been constant for 5 min. Adjust the jacket temperature to be equal to or slightly lower than the calorimeter, and run for 5 min to obtain equilibrium. A Wheatstone bridge and galvanometer capable of measuring resistance to 0.
Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination. During ignition of a sample, the operator shall not permit any portion astj his body to extend asym the calorimeter. Suitable reducing valves and adaptors asfm 2 to 3.