Burrs

J. W. Novak, Jr., R. R. Burr, andR. Bednarik, "Mechanisms of Metal Ion Adsorption of Activated Alumina," Vol. 35, Proc. Int. Symp. on Metals Speciation, Separation, and Recorey, Chicago, lU., July 27—Aug. 1, 1986, Industrial Waste Elimination Research Center of the Illinois Institute of Technology, Chicago, lU. 

The efficiency of the vegetable matter (burr and seeds) removal mechanism depends on the carefiil maintenance of settings and speeds and the level of drying of the scouted wool (86). The butt wastes contain wool fiber. Butt, together with fiber which has dropped beneath the card, may be carbonized and used in the woolen system. 

Specifications for Piezometer Taps The size of a static opening should be small compared with the diameter of the pipe and yet large compared with the scale of surface irregularities. For rehable results, it is essential that (1) the surface in which the hole is made be substantially smooth and parallel to the flow for some distance on either side of the opening, and (2) the opening be flush with the surface and possess no burr or other irregularity around its edge. 

Rounding of the edge is often employed to ensure absence of a burr. Pressure readings will be high it the tap is inclined upstream, is rounded excessively on the upstream side, has a burr on the downstream side, or has an excessive countersink or recess. Pressure readings will be low if the tap is inclined downstream, is rounded excessively on the downstream side, has a burr on the upstream side, or protrudes into the flow stream. Errors resulting from these faults can be large. 

It is standard practice to provide a chamfer at the inside edges of tube holes in tiibe sheets to prevent cutting of the tubes and to remove burrs produced by drilling or reaming the tube sheet. In the lower tube sheet of vertical units this chamfer serves as a pocket to collect material, dirt, etc., and to serve as a corrosion center. 

Check parting-line surfaces for full contact. Stone or lap if burrs or raised edges exist. 

Remove burrs on inside of pipe but do not chamfer edge of hole... 

Anonymous, V2P2 — The Premier Process Hazard Calorimeter System, Eauske and Assoc., Burr Ridge, IL. 

It is essential to ensure that the following criteria are met otherwise errors will result. First, the mouth of the hole inside the duct must be smooth and flush with the duct inner surface. No burrs or other irregularities must be on the surface in the vicinity of the hole. Second, the hole must be perpendicular to the tube axis. The size of the hole has an effect on the measured pressure as well. A general rule is, the smaller the hole the better. Very small holes do, however, slow down the response of the instrument. Usually the hole diameter is a few millimeters. Note also that the smaller the hole, the greater the risk of blockage. Further information on the effect of the hole size can be found, e.g., in Ower and Pankhurst. 

Finding faster and easier ways to remove glue, paint, oil, burrs and other undesirables from products are operations improvements finding ways not to put them there in the first place is a process improvement. 

After the tubing is cut, remove all burrs and sharp edges from the inside and outside of the tube with a deburring tool. Figure 40.29. Clean out the tubing. Make sure no foreign particles remain. 

Before placing a machine on its base, make sure that both the base and the bottom of the machine are clean, rust free, and do not have any burrs. Use a wire brush or file on these areas if necessary. 

Use only clean shims that have not been kinked or that have burrs. 

Before setting the machine in place, remove all dirt, rust, and burrs from the bottom of the machine s feet, the shims to be used for leveling, and the base at the areas where the machine s feet will rest. 

Remove all burrs and sharp edges from the shaft or shaft sleeve, including sharp edges of keyways and threads. Worn shafts or sleeves should be replaced. 

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