Pipe load

At locations where variable support reactions are not tolerable over the required movement range, constant-effort springs or counterweights ate used. Piping systems supported entirely by constant-effort devices requite precise accuracy to counterbalance the total piping load, otherwise the system may be vertically unstable. 

Centerline-Mounted Pefmey Pump. For refinery appHcations, temperatures, pipe loads, and product flammabiUty are the prime factors ia selecting a pump. 

Many factors (such as piping loads, aligmnent at operating conditions, supporting structure, handling during... 

Appendix F defines the method used by the piping designer to determine allowable piping loads. 

Vertical in-line pumps that are supported only by the attached piping may be subjected to component piping loads that are more than double the values shown in Table 2. lA (2. IB) if these loads do not cause a principal stress greater than 41 MPa (5950 psi) in either nozzle. For calculation purposes, the section properties of the pump nozzles shall be based on Schedule 40 pipe whose nominal size is equal to that of the appropriate pump nozzle. Equations F-6A (F-6B), F-7A (F-7B), and F-8A (F-8B) can be used to evaluate principal stress, longitudinal stress, and shear stress, respectively, in the nozzles. 

Provided that ATKSa can be reduced to 4879, the apphed piping loads acting on each nozzle satisfy the condition specified inF.l.2.1. 

Is a pnmp and baseplate stiffness (pipe load) test reqnired Yes No... 

A535 Nozzle load / shaft deflection test PIPE LOAD c 1 Ainon witnessed Biwitnessed Ciobserved Di none Ziother... 

Q = total load per saddle (ineluding piping loads, wind or seismic reactions, platforms, operating liquid, etc.) lb... 

Fig. 14.3 Centrifugal compressor installation. Note that the designer has chosen to locate the connecting piperack on a level above the compressor this provides the facility to anchor the piping loads caused by thermal expansion, and also maximizes access to the compressor (while minimizing the elevation). Note also the bypass control valve for surge protection...

In the event that the nozzle loads stiU result in excessive shell stresses after the iterative work process is conducted, the loadings may be reduced by recalculating the piping loads utilizing the vessel spring rate . Often times the loads determined using the vessel spring rate will be much... 

Stresses imposed on pump by pipe loads. Examine pipe design to determine stress concentration point. Redesign piping to eliminate loads. 

Spring supports—These lines move at the point of support as a result of thermal expansion or contraction and are generally supported by springs. Designed for specific pipe loads and movements, they maintain a support under a line throughout its range of movement. 

Soil type Some soils are corrosive some soils experience significant volume changes in response to moisture changes, resulting in changes to pipe loading... 

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