Weld point

Weak Acid. Stainless steels (SS) have exceUent corrosion resistance to weak nitric acid and are the primary materials of constmction for a weak acid process. Low carbon stainless steels are preferred because of their resistance to corrosion at weld points. However, higher grade materials of constmction are required for certain sections of the weak acid process. These are limited to high temperature areas around the gau2e (ca 900°G) and to places in which contact with hot Hquid nitric acid is likely to be experienced (the cooler condenser and tail gas preheater). 

Another variation is to use a thin air jet around a process or an opening to a pt(x ess. For welding or soldering on a table, a circular tube with supply holes in the upper side could be used. The circular tulw is placed around a fixed welding (soldering) place and blow s upward around the welding point into a basic opening hood. 

Weld line Weld or knit fines where two parts of a melt join while flowing into the mold cavity can result in problems. The quality of the weld depends on the temperature of the material at the weld point and the pressure present in the melt after flowing from the gate. The higher the temperature and pressure, the more complete the weld and the better the product performance and appearance. Bringing the material to the weld point at a higher temperature and pressure requires rapid filling of the mold cavity (Chapter 3, BASIC FEATURE, Weld Line). 

S) is the allowable stress and for Stainless Steel, TP 316 is taken to be 18750 lbs/sq.in. over the temperature range of 0-l00°C,(3) (E) is the longitudinal weld point factor and is taken for double welded butt joints as 0.85(3)... 

When Iron is subjected to a red heat, it softens and becomes tough, ft circumstance which adds much to its value iu the manufacturing aits and its property of welding at a white heat, gives a facility in working it which no other metal possesses. When heated above the welding point, it crumbles under the strokes of the hammer. 

At the end of each interval the average scar diameter is recorded. Two values are generally reported— load wear index (formerly mean Hertz load) and weld point. 

Test which is used to determine the relative wear-ball preventing properties of lubricants under boundary test lubrication conditions. Two values are reported - load wear index and weld point from two procedures EP test ASTM D 2596 and wear test ASTM D2266. There are four steel /2-inch balls. Three of the balls are held together in a cup filled with lubricant while the fourth ball is rotated against them. Resistance to motion. 

Check welded points near motion machine, such as centrifugal atomizer, hammer, etc. 

STRESS Tank weld points - stress of liquid mass and temperature extremes... 

Samples 5 and 6. Show the mould full, but with heavy sink marks - there is no packing yet. There are witness marks at the weld points, indicating weakness. Sample 6 is slightly better packed than sample 5. (The whitish splash marks on sample 6 are due to a trace of moisture in the polymer.) Plate 22. Flashing effect of hatching. 

Angle iron 12 —Welding points of down-conductor... 

The grid is a single structure having no weld points. 

The welded seams on the vapor degreasing tank offer a potential hazard risk. Failure of any weld point below the liquid level would obviously result in loss of some or all of the liquid solvent into the surrounding concrete pit area. Considering the stress of liquid mass inside the tank, as well as the temperature extremes associated with solvent heating and off-gas coohng, the possibility of weld failure occurring sometime during the life cycle of this system must be carefully evaluated. 

STRUCTURAL Tank leakage or structural failure Injury to personnel loss or damage to parts or equipment 3D Weld points are not inspected before initial use... 

Galvanic currents also can flow between various parts of the same metallic structure because of differences in the surroimding electrolyte or the metal itself (impurities, welding points, etc.). Metal composition, environmental factors, and the physical and chemical properties of the soil determine which areas on a metal surface become anodes and cathodes. 

Bri70] Brindley, B.J. and Worthington, P.J., "Weld-Point Phenomena in Substitutional Alloys, AfetoZZ. iZeu., Vol 15, 1970, p. 101-114... 

During the design of cells, internal circuit isolation devices can be installed. At present, two devices are in use. One is to cormect the internal current bus with low-melting alloys with the external post or output. When the current is too large, the alloy will produce heat and melt itself, and then it is isolated from the outer electric circuit. The other device is to weld electric feed-through control to the contact disk. When the current is too large, the welding point will melt down and separate from the disk. 

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