Allowable nozzle loading

For pump casings constmcted of materials other than steel or alloy steel or for pumps with nozzles larger than 16 NPS, the vendor shall submit allowable nozzle loads corresponding to the format in Table 2-lA (2-IB). 

Note If the pump is mounted in a vessel, the nozzle of the vessel shall also be designed to withstand these loads. See 2.4 for allowable nozzle loads. 

NOTE The twice nozzle load requirement is a pressure casing design criterion. Allowable nozzle loads for piping designers are the values given in Table 4. Other factors such as casing support or baseplate stiffness affect allowable nozzle loads. 

HI 9.6.2, Centrifugal Vertical Pumps—Allowable Nozzle Loads ... 

Piping. Suits piping layout nozzles correctly dimensioned allowable nozzle loadings co-ordinated with loads from piping pipe support brackets provided where needed. 

The allowable loads and moments hsted in Table 7-14 do not represent any actual loading or a real maximum allowable load or moment. Rather they are arbitrary maximum allowable nozzle loads. This procedure does not take into account any of the vessel parameters such as diameter, thickness, material, temperature, allowable stress, internal pressure, etc. Since the basis of Table 7-14 is the flange rating , the associated nozzle loads are generic only. 

A. Each discharge pipe is supported to transfer transient discharge load to the adjacent structure, in order to stay within the allowable pressurizer nozzle loads. 

To determine the amount of leg needed to sati the vessel nozzle allowables, the designer must first know the allowable vessel nozzle loads. Once the designer knows the allowable loads, he or she can enter a nomograph and determine the amount of leg needed to satisfy the loads. 

Note that in lieu of testing, Par (b) 2 and (b) 3 above allows the use of a capacity factor of 0.80 as a multiplier on the stamped capacity of the spring loaded safety relief valve (nozzle bpe). Some manufacturers test specific valve/rupture disk combinadons and determine the actual capacity factor for the combination, and then use this for the net capacity determination. See Figures 7-10, 7-11, 7-12, 7-13A and 7-13B. c. A rupture disk de ice may be installed on the outlet side of a spring loaded safety relief valve... 

The steam enters the nozzles of the turbine and expands to the buckets or blades. Hand-operated or automatic valves are usually available to control the flow to groups of these nozzles. This allows more efficient operation at reduced loads. 

The SP-ablator allows higher aerodynamic loads with lower surface/mass ratio for heat shields, and should be ideally suited for moon, mars, or other interplanetary return missions. These shields are also suitable for cost-effective flight models of winged reentry capsules. A large application potential can be seen for nozzles and combustion chambers or housings of rocket engines. Dornier plans to manufacture a heat shield for the Mirka capsule one meter in diameter. The C/SiC-cover will be fabricated in one piece. 

Cladding for the reactor vessel is a continuous integral surface of corrosion-resistant material, having -inch (0.56 centimeter) nominal thickness, and a f-inch minimum thickness. The reactor vessel is supported by four vertical columns located under the vessel inlet nozzles. These columns are designed to flex in the direction of horizontal thermal expansion and thus allow unrestrained heat-up and cool-down. The columns also act as a hold-down device for the vessel. The supports are designed to accept normal loads and seismic and pipe rupture accident loads. 

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