Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Tensile tube

Resistance in °C is the temperature differential the two surfaces of a tube or a constrained plate that will cause a tensile stress of 6.9 MPa (1000 psi) on the cooler surface. [Pg.295]

Creep Rupture. The results from creep mpture tests on tubes under internal pressure at elevated temperatures (71,72) may be correlated by equation 16, in which is replaced by the tensile creep mpture stress after time t at temperature T. [Pg.86]

Fig. 1. Illustrations of the USP test for tensile strength. The suture is tied in a surgeon s knot around a short length of mbber tubing. Fig. 1. Illustrations of the USP test for tensile strength. The suture is tied in a surgeon s knot around a short length of mbber tubing.
A variation of the preceding process is used to produce oriented vinyUdene chloride copolymer films. The plastic is extmded into tube form and then is supercooled and subsequently biaxiaHy oriented in a continuous bubble process. The supercooled tube is flattened and passed through two sets of pinch roUs, which are arranged so that the second set of roUs travels faster than the first set. Between the two sets, air is injected into the tube to create a bubble that is entrapped by the pinch roUs. The entrapped air bubble remains stationary while the extmded tube is oriented as it passes around the bubble. Orientation is produced in the transverse and the longitudinal directions, creating excellent tensile strength, elongation, and flexibiUty in the film. The commercial procedure has been described (157). [Pg.441]

The longitudinal crack apparent in Fig. 12.21 resulted from stresses from internal pressure that exceeded the tensile strength of the metal in the greatly thinned tube wall. [Pg.292]

The joint is designed so that the solder layer will yield in shear at the same axial load f that causes the main tube to fail by tensile yield. Estimate the required value of W, given the following data f = 1 mm dy (copper) = 120 MPa dy (solder) = 10 MPa. [Pg.157]

Titanium is a white metal and, when cold, is brittle and may be powdered. At a red heat it may be forged and drawn. The tensile strength of titanium is almost the same as that of steel, while its specific gravity (4.5) is almost two times less than that of steel. Hence, its specific strength (tensile strength/speciflc gravity) is 1000, which is considerably higher than that of 18/8 steel, which has a value of 700. Titanium is now available as plate, sheet and tube, and its use in chemical plant construction is considered common. [Pg.95]

Tube and shell heat exchangers, small distillation columns, reactors, valves, pumps and other items are available in impregnated grapliite. Graphite can be joined only by cementing, which embrittles on aging. It is prone to mechanical damage, particularly when subjected to tensile stresses. [Pg.102]

Since most SWNTs have diameters in the range of 1 -2 nm, we can expect them to remain cylindrical when they form cables. The stiffness constant of the cable structures will then be the sum of the stiffness constants of the SWNTs. However, just as with MWNTs, the van der Waals binding between the tubes limits tensile strength unless the ends of all the tubes can be fused to a load. In the case of bending, a more exact... [Pg.145]

Tensile Properties. The tensile properties, except elongation, of the upset ends of the casing and tubing shall comply with the requirements given for the pipe body (see Table 4-141). In case of dispute, the tensile properties (except elongation) of the upset shall be determined from a tensile test cut from the upset. [Pg.1133]

The simultaneous action of cyclic stress alternating tensile and compressive and corrosive attack is known as corrosion fatigue. Corrosive attack can be in the form of pitting. These pits function as notches, acting as stress risers and initiate cracks. Once a crack is formed, the probability of pipe failure is enhanced by further corrosion as corrosion is accelerated by action of stress. The tip of the crack deep within the fracture, the area under the greatest stress, is anodic to the wider part of the crack. As corrosion progresses, the metal at the tip of the crack goes into the solution, the crack deepens and eventually penetrates the wall of the tube. [Pg.1287]

Butyl ruhher vulcanizates have tensile strengths up to 2,000 psi, and are characterized hy low permeahility to air and a high resistance to many chemicals and to oxidation. These properties make it a suitable rubber for the production of tire inner tubes and inner liners of tubeless tires. The major use of butyl rubber is for inner tubes. Other uses include wire and cable insulation, steam hoses, mechanical goods, and adhesives. Chlorinated butyl is a low molecular weight polymer used as an adhesive and a sealant. [Pg.357]

The strength and adhesion of sprayed metal coatings are extremely difficult to measure with precision, and the properties of sprayed metals vary greatly with the spraying conditions and with the conditions of test. It is difficult, therefore, to correlate the values taken from the literature on the subject. For instance, American workers produce tensile test pieces by depositing on to 9-5 mm (0-375 in) steel tube and then machining out the tube. By this method the results shown in Table 12.7 were obtained. [Pg.426]

Transition Zone III is of utmost importance, since the formation of dry spots is accompanied by a dramatic change in the heat transfer mechanism. In such units as gas-fired boilers, the dry spots may cause the tube wall temperature to approach the temperature of the heating gas. However, before the tube wall temperature reaches a steady-state value, the tensile strength of the tube wall is reduced, and rupture may occur. This phenomenon, called burn-out, may also occur at any point along the tube wall if the wall heat flux qmt is large enough so that a vapor film forms between the tube wall and the liquid surface. [Pg.41]


See other pages where Tensile tube is mentioned: [Pg.464]    [Pg.106]    [Pg.464]    [Pg.106]    [Pg.267]    [Pg.51]    [Pg.380]    [Pg.365]    [Pg.98]    [Pg.376]    [Pg.192]    [Pg.265]    [Pg.376]    [Pg.184]    [Pg.971]    [Pg.978]    [Pg.221]    [Pg.47]    [Pg.57]    [Pg.144]    [Pg.148]    [Pg.149]    [Pg.199]    [Pg.220]    [Pg.1233]    [Pg.3]    [Pg.290]    [Pg.1380]    [Pg.97]    [Pg.728]    [Pg.6]    [Pg.153]    [Pg.423]    [Pg.11]    [Pg.117]    [Pg.352]    [Pg.162]   
See also in sourсe #XX -- [ Pg.153 ]




SEARCH



Geotextile tubes circumferential tensile stresses

© 2024 chempedia.info