Pipe anchor load

Pipe anchor load The force calculated to resist loading in anchored piping systems, the pipe anchor load is added to the thermal expansion loads of the equipment. 

Note Anchor loads with corrugated joints will be somewhat higher or lower depending on pipe size, pressure, etc. Consult manufacturer s instructions. 

The loads at the piping anchor to the equipment nozzle shall be used as the equipment nozzle loads if the equipment and its supports are rigid, or if the equipment nozzle stiffness is modeled in the piping analysis. 

Piping supports, guides, and anchors increase local stresses on the pipe wall at the point of attachment. These stresses derive from continuously acting loads owing to the weight of the piping system carried at these points (pipe, contents, insulation), the pressure in the pipe, and any other loads such... 

Thermal-expansion and -contraction loads occur when a piping system is prevented from free thermal expansion or contraction as a result of anchors and restraints or undergoes large, rapid temperature changes or unequal temperature distribution because of an injection of cold liquid striking the wall of a pipe cariying hot gas. 

The derrick or mast must also be designed to withstand wind loads. Wind loads are imposed by the wind acting on the outer and inner surfaces of the open structure. When designing for wind loads, the designer must consider that the drill pipe or other tubulars may be out of the hole and stacked in the structure. This means that there will be loads imposed on the structure by the pipe weight (i.e., setback load) in addition to the additional loads imposed by the wind. The horizontal forces due to wind are counteracted by the lattice structure that is firmly secured to the structure s foundation. Additional support to the structure can be accomplished by the guy lines attached to the structure and to a dead man anchor some distance away from it. The dead man anchor is buried in the ground to firmly support the tension loads in the guy line. The guy lines are pretensioned when attached to the dead man anchor. 

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. 

Thermal Loads Due to Restraints. These loads consist of thrusts and moments, which arise when free thermal expansion and contraction of the piping are prevented by restraints or anchors. 

An expansion joint that depends on external main anchors to restrain pressure end load shall be tested in place in the piping system. 

If the pipe is anchored by bearing at the bend, care shall be taken to distribute the load on the soil so that the bearing pressure is within the capability of the soil involved. 

When oil tankers have tonnages that prevent them from entering certain ports, they anchor at sea and are loaded and unloaded by sea lines which are pipes running out to them. 

The major stresses to which the discharge pipe is subjected are usually caused by thermal expansion and discharge reaction forces. The sudden release of a compressible fluid into a multi-directional discharge pipe produces an impact load and bourdon effect at each change of direction. The piping must be adequately anchored to prevent sway or vibration while the valve is discharging (Figures 7-82 and 7-83). 

End anchors at B, C, and E have possible rnximum axial loads of 15,000 pounds in each leg solid arrows, Figure 7-116). The resultant anchor l-oad is the vector sum of the thrusts in the two -egs, or 21,000 pounds acting along an axis 45° from the pipe axes (dotted arrows. Figure 7-116). Maximum, contraction loads in the reverse rrection consist of friction only and amounts to... 

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...

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