Dripping test

Applications. The method is used to determine burning drops produced during material decomposition. 

Major results Huntite and hydromagnesite mixture at loading of minimum 25% in ethylene-propylene copolymers eliminates inflammation  

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Wronkiewicz, D. J. Bates, J. K., Wolf, S. F. Buck, E. C. 1996. Ten-year results from unsaturated drip tests with U02 at 90 °C implications for the corrosion of spent nuclear fuel. Journal of Nuclear Materials, 238, 78-95. 

Pill test Drip test Basin test... 

Drip Test Titanium/coating evaluation Resistance to hydraulic fluid of coating and substrate at various temperatures (usually 450°F) Bare 6A1-4V titanium specimen... 

Drip Course. A protruding or recessed course inside the crown of a glass tank, to prevent molten material running down and corroding the breast walls. Drip Test. See slag attack tests. Drop Arch. An auxiliary brick arch projecting below the general inner... 

In the Crucible Test a well, drilled or moulded in a block of the refractory to be tested is filled with the selected slag and the block heated to the required temperature, for a specified time. The block is then removed, cooled, sectioned and the slag/refractory interface examined. The test is simple, but is static, and does not allow a temperature gradient to be studied. The reaction layer built up at the interface may produce erroneous results. The Pill Test is similar - a pellet of slag can be measured. In the Drip Test a stream of slag pellets falls on to a refractory block... 

M O, C. 2000. Commercial spent nuclear fuel degradation in unsaturated drip tests. Input Transmittal WP-WP-99432.T. ACC MOL.20000107.0209, Las Vegas, NV. 

Fig. 13.3 Conceptual division of an arbitrary hexahedral element into 40 tetrahedral elements and the resulting surface reconstruction for a droplet dripping test case...

This phosphinic anhydride [15171 -48-9] C H O P, is then reacted with glycol and other precursors of poly(ethylene terephthalate), to produce a flame-retardant polyester [82690-14-0] having phosphinate units of the stmcture —0P(0)(CH2)CH2CH2C00—. Trevira 271 is useflil for children s sleepwear, work clothing, and home flirnishings. A phosphoms content as low as 0.6% is reported to be sufficient for draperies and upholstery tests if melt-drip is not retarded by print pigments or the presence of nonthermoplastic fibers (28). 

Regulatory Legislation. In Febmary 1978, the Consumer Products Safety Commission approved changes in the FF-3 and FF-5 standards for children s sleepwear. It eliminated the melt—drip time limit and coverage for sizes below 1 and revised the method of testing the trim. This permits the use of untreated 100% nylon and 100% polyester for children s sleepwear (157—162). 

Fire-Resistant Hydraulic Fluids. Fire-resistant hydrauhc fluids are used where the fluid could spray or drip from a break or leak onto a source of ignition, eg, a pot of molten metal or a gas flame (17). Conditions such as these exist in die-casting machines or in presses located near furnaces. Specific tests for fire resistance are conducted by Factory Mutual in the United States. 

Flammability. Most nylons ate classified V-2 by the Underwriters Laboratory UL-94 test, which means that these nylons are self-extinguishing within a certain time-scale under the conditions of the test. They achieve this performance by means of giving off burning drips. 

The UL flammability ratings describe the relative ease of ignition and combustibiUty of plastics. Tests include the measurement of flame propagation, time to self-extinguish, melt and drip with and without flame, and oxygen indexes. Some engineering plastics, eg, polyetherimides, are, as ranked by this test, inherently nonflammable. Others can be made nonflammable by compounding with flame retardants (ERs) such as bromine... 

No test specimens bum longer than 10 seconds after each removal from the flame. No specimens exhibit flaming drip that ignites dry surgical cotton placed 12" below the test specimen. Nor does afterglow persist for longer than 30 seconds. 

One of the most stringent and most widely accepted test is UL 94 that concerns electrical devices. This test, which involves burning a specimen, is the one used for most flame-retardant plastics. In this test the best rating is UL 94 V-0, which identifies a flame with a duration of 0 to 5 s, an afterglow of 0 to 25 s, and the presence of no flaming drips to ignite a sample of dry, absorbent cotton located below the specimen. Tlie ratings go from V-0, V-l, V-2, and V-5 to HB, based on specific specimen thicknesses. 

Ms. Barker had a bowel resection 4 days ago. After a culture and sensitivity test of her draining surgical wound, the primary health care provider orders penicillin G aqueous IV as a continuous drip. Determine what questions you would ask Ms. Barker before the penicillin is added to the IV solution. 

G Mass loss (mass loss through burning plus mass of drips falling from test rig) shall not be greater than 60 grams. 

When samples are exposed vertically to a flame or another heat source, some materials melt and drip, and do not burn up completely. This will cause their smoke results to be artificially low [9]. Burning samples horizontally makes material performance comparisons in a small scale test more logical because the entire sample will be burnt in every case. This is very relevant when dealing with fire retarded materials which do not melt or drip, and will thus, yield similar smoke production results in the vertical and horizontal modes. 

The expected discrepancy between NBS smoke chamber results and those from a good smoke production test were compounded in this work by the fact that many of the materials used melt and drip. 

The fractionator is not necessary. Place a hole in the bottom of the centrifuge tube, and the solution that dripped from the bottom will be collected into a test tube (same volume each tube). 

Drip the chloroform wash through the column and save the extract. Test continuously by evaporating a drop on clean glass until it ceases to flouresce under a black light. 

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