Test methods velocity

FIG. 18-85 Depth correction factorto he applied to unit areas determined with Wilhelm-Naide and direct methods. Velocity ratio calculated using tangents to settling cun e at a particular settled solids concentration and at start of test. 

Brisance. Sand test, 56.9g vs 53.0 for Pentolite and 43.0 for TNT plate dent test, method B, 141% TNT for cast un confined PTX-2, u 1.71g/cc Compatibility with metals. Does not affect Al, dry or wet does not affect mild steel, dry Detonation velocity. 8000—8065m/sec for an unconfined cast charge 1 inch in diam, d 1.70 g/cc vs 7500m/sec for Pentolite and 6900m/sec for TNT... 

The NACE Landrum Wheel velocity test, originally TM0270-72, is typical of several mechanical-action immersion test methods to evaluate the effects of corrosion. Unfortunately, these laboratory simulation techniques did not consider the fluid mechanics of the environment or metal interface, and service experience very seldom supports the test... 

The need for controlling the exhaust emissions from automotive vehicles has been recognized since 1975. The most effective and tested method proved to be the installation of diree-way catalysts at the exhaust emission system of cars. The development and the improvement M of such catalysts was and will be a complicated effort, since a cat-alyst placed in a vehicle should simultaneously accelerate oxida-tion and reduction reactions, under continuously changing conditions of temperature and space velocity, in contrast to industrial applications where catalysts operate under fixed and MjM controlled conditions. Generally, the catalytic converter of a vehicle has to satisfy the following requirements ... 

A slowly loaded specimen instmmoited with only a load cell and a ladder crack velocity gauge forms the basis of a practical test method for determining the material property governing RCP and crack arrest. 

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