Maximum rated load

Maximum rated load on rotary table beams. 

Maximum Load Rating. The maximum load ratings shall be given in tons (2,000-lb units). The size class designation shall represent the dimensional interchangeability and the maximum rated load of equipment specified herein. The recommended size classes are as follows (ton) ... 

The test unit shall be loaded to the maximum rated load. After this load has been released, the unit shall be checked for useful functions. The useful function of all equipment parts shall not be impaired by this loading. 

Bit Pressure Loss. It is necessary to choose the bit pressure loss such that the thrust load created in combination with the weight on bit will yield an on-bottom load on the motor thrust bearings, which is less than the maximum allowable load for the bearings. Since this is a deviation control run and, therefore, the motor will be drilling only a relatively short time and distance, the motor thrust bearings will be operated at their maximum rated load for on-bottom operation. Figure 4-206 shows that maximum allowable motor thrust bearing load is about... 

Whenever we start-up, or subject the converter to sudden line/load transients, the current no longer stays at the steady value it has under normal operation (i.e. when delivering the required maximum rated load current). For example, if we suddenly short the output the control circuitry in an effort to regulate the output may momentarily expand the duty cycle to the highest permissible value (as set by the controller). We then are no longer in steady state, and so under the increased on-time voltseconds, the current ramps up progressively, and can reach the set current limit. 

Pressure. Within limits, pressure may have Htfle effect in air-sparged LPO reactors. Consider the case where the pressure is high enough to supply oxygen to the Hquid at a reasonable rate and to maintain the gas holdup relatively low. If pressure is doubled, the concentration of oxygen in the bubbles is approximately doubled and the rate of oxygen deHvery from each bubble is also approximately doubled in the mass-transfer rate-limited zone. The total number of bubbles, however, is approximately halved. The overall effect, therefore, can be small. The optimum pressure is likely to be determined by the permissible maximum gas holdup and/or the desirable maximum vapor load in the vent gas. 

If a short-time duty is performed on a Continuous Maximum Rating (CMR) motor with some no-load or idle running, the temperature rise 0 may not reach its maximum value, 0 , us shown in curve (c) of Figure... 

Table 6 show s maximum liquid loading rates per fr of column diameter. Minimum liquid rate runs 0.5 to 2gpm/ft ... 

Equilibrium Considerations - Most of the adsorption data available from the literature are equilibrium data. Equilibrium data are useful in determining the maximum adsorbent loading which can be obtained for a specific adsorbate-adsorbent system under given operating conditions. However, equilibrium data by themselves are insufficient for design of an adsorption system. Overall mass transfer rate data are also necessary. 

The combined rod load should be checked anytime the gas loads are approaching the maximum rating of the compressor frame or anytime rod reversal is marginal or questionable. 

Determine the values of the plate activation velocities (or load points), Fh, for the minimum as well as maximum liquid loads at top and bottom of the tower and any intermediate points exhibiting significant change in flow rates. For partial column area... 

Many of the major motor manufacturers discovered on comparison of their own specifications to the IEEE Standard 841-1994 that their designs already exceeded the requirements of the new standard. Others made a few modifications, and their units satisfied the new standard. The standard required, among other items, (a) a no-load vibration limit of 0.08 in./sec and (b) a temperature rise of 80°C maximum with Class B insulation at rated load. The life of the motor is essentially controlled by the life of its internal insulation and is represented by Figure 14-11. ... 

Mast setup distance The distance from the centerline of the well to a designated point on the mast structure defined by a manufacturer to assist in the setup of the rig. Maximum rated static hook load The sum of the weight applied at the hook and the traveling equipment for the designated location of the dead line anchor and the specified number of drilling lines without any pipe setback, sucker rod, or wind loadings. 

Static hook load see Maximum Rated Static Hook Load. 

API Standard 4A (superseded by Standard 4F) provides rating of derrick capacities in terms of maximum safe load. This is simply the load capacity of a single leg multiplied by four. It does not account for pipe setback, wind loads, the number of lines between the crown block and the traveling block, the location of the dead line, or vibratory and impact loads. Thus, it is recommended that the maximum safe static load of derricks designed under Standard 4A exceed the derrick load as follows ... 

Under the rigging conditions given on the nameplate, and in the absence of setback or wind loads, the static hook load under which failure may occur in masts conforming to this specification can be given as only approximately twice the maximum rated static hook load capacity. 

The manufacturer shall establish the reduced rated static hook loads for the same conditions under which the maximum rated static hook loads apply, but with the addition of the pipe-setback and sucker-rod loadings. The reduced rated static hook loads shall be expressed as percentages of the maximum rated static hook loads. Thus, the portable mast ratings in Standard 4D include a safety factor of 2 to allow for wind and impact loads, and require the manufacturer to specify further capacity reductions due to setback. 

Maximum rated static hook load for a specified number of lines to the traveling block. 

Rated static hook load for wind velocities varying from zero to maximum rated wind velocity with full rated setback and with maximum number of lines to the traveling block. 

Maximum rated static hook load, if applicable. 

Maximum rated combined load of setback and rotary table beams. 

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