Status: Alert Withdrawn. Norwegian title: Marine Drilling Riser Couplings. English title: Marine Drilling Riser Couplings. Item type: Standard (Kun elektronisk). Tensile test, performed in accordance with the API Spec. 16R standard, is used to verify whether the design of key load bearing parts of the marine riser, such as. As recommended by API Spec 16R, the stress linearization and classification in one of the key steps to design a riser connector. The designers are encountering .
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Select the rated load from 4. A simple approach to extend the stress linearization and classification methods to three-dimensional FEA is proposed. Notch impact tests shall be performed with the test specimens oriented longitudinally to the grain orientation of the parent metal. No more than ten relevant indications in any continuous 6square inch area.
When L is less than T, consider section as a plate of L thickness. Determination of the equivalent load for bending is discussed in 4. Subscription – always available and updated A web subscription provides an easy and secure access to standards, and you are guaranteed to always have the latest edition.
Using the maximum shear stress theory of failure requires that 166r the maximum shear stress, de? The allowable material stresses are established in 4. Using this relationship, the calculated riser pipe stress at the middle of the pipe wall caused by pure bending is treated the same as that caused by pure tension. Status of the publication can be ascertained from the API Authoring Department [telephone ].
The testing has two primary objectives: The benefits of a subscription: A comprehensive 1r6 of de? A coupling which is engaged by partial rotation of one member into an interlock with another.
Design Couplings Marine drilling risers. Log sheets for recording cumulative use of each riser coupling. This product can only be purchased electronically by customers who have a web subscription agreement.
Average for three specimens: Auxiliary loads as de? An example of a local membrane stress is the axial stress averaged over the area adjacent to the window of a dog coupling. Results of SAF and peak stress calculations in accordance with 4.
The application of dynamic and static loading on the coupling box or pin interface with the handling tool may be simulated. Graphic spce schedule of routine maintenance tasks.
Each part shall be visually examined. The weight of a riser coupling shall include the sum of the in-air weights of the structural components of the coupling, the lock mechanisms, and the brackets or clamps that support the end extremities of auxiliary and choke and kill lines. The rated load or rated working pressure of the coupling may be greater than that of an assembled appi joint.
API Spec 16R (R)
For example, a coupling having six planes of symmetry would require analysis of a degree sector one-twelfth. If not possible, then an iterative method involving several solutions shall be required. The manufacturer shall document the buoyancy thrust loads for which the coupling has been designed. When L is less than D, consider as a plate of T thickness. No rounded indications greater than 1? It consists in calculating the membrane and bending stresses in a given plane by averaging over a suitable portion of a cross-section the results of the linearization in the stress classification lines SCLs located in the selected plane.
API Product Specification
This specification relates directly to API 16Q, which covers the design, selection, and operation of the marine drilling riser system as a whole. Compressive bearing load developed between box and pin members at their interface; this is accomplished by elastic deformation induced during makeup of the coupling.
Therefore, the analyst must predict where high stresses are likely to occur. Generally, API standards are spe and revised, reaf?
The riser coupling box, pin, locks, brackets, etc. API does not represent, warrant, or guarantee that such products do in fact conform to the applicable API standard.
API Product Specification
For assistance or to subscribe, please contact us:. API 8th Ed All materials used shall conform to a written speci? Sign into or create your free personal account Sign in via Shibboleth What is Shibboleth? Materials for primary load carrying components, including weldments, shall additionally meet the minimum mechanical properties in Table 1.
The SAF speec a function of the double amplitude range of alternating stress.
Neither calculated 16t measured stresses in a coupling shall exceed the allowable stress limits of the coupling material when subjected to the design load. This ensures that you are always up-to-date and saves you both time and money. Classifying stresses induced by preload as primary or secondary depends on coupling function and not on overstressing the coupling.
API Spec 16R (R2010)
All pressure containing welds shall have complete joint penetration. The analysis must provide accurate or conservative peak stresses, and shall include any deleterious effects of loss of preload from wear, friction, and manufacturing tolerances. Hardness values shall meet the requirements of the manufacturer’s written speci?
A primary stress is one that is induced by the external loads or preload and is necessary to satisfy the laws of static equilibrium.