NOK 1 ,00 excl. A minimum of two Brinell hardness tests shall be performed on the QTC after the? Sign into or create your free personal account. Design Couplings Marine drilling risers.

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This publication will no longer be in effect? API Product Specification This situation presents a real challenge for the design of the drilling riser which depends to a large extent on these parameters, as well as other related to operational and environmental conditions. API does not represent, apec, or guarantee that such products do in fact conform to the applicable API standard. Undercut shall not reduce the thickness in the area considering both sides to below the minimum thickness.

Cyclic testing to failure yields a data point to aid in predicting fatigue life. Choke and kill lines are primary pressure-containing members. An example of a bearing stress is the contact stress between the dogs and the loading shoulder of a dog coupling.

The following are the allowable stresses that must be satis? Tensile and impact specimens shall be removed from the QTC so that their longitudinal centerline axis is wholly within the center core 1?

Maximum stresses almost always specc at surfaces. Determination of the equivalent load for bending is discussed in 4. No rounded indications greater than two-thirds of weld thickness. The other stresses must be linearized, separated into membrane and bending components, categorized, and converted to von Mises effective stresses before they can be compared to the allowable stresses. For example, pai stressed regions of the structure require a? A given coupling size may be used with a range of riser pipe outside diameters, wall thicknesses, and material yield strengths.

Note that all stresses are not included when calculating every von Mises effective stress. Information concerning safety and health risks and proper precautions with respect to particular materials and conditions should be obtained from the employer, the manufacturer or supplier of that material, or the material safety data sheet.

Environmental loading includes the hydrodynamic forces of current and waves and the motions induced by the? Generally, API standards are reviewed and revised, reaf? A section of riser pipe having ends?

Additionally, the coupling may provide support for choke, kill and auxiliary lines, and load reaction for buoyancy devices.

This procedure is repeated for all of the six stress components that are signi? For simplicity, the design loading condition is taken to be axisymmetric tension. Identify high stress points in the structure and the pipe-tocoupling weld. Related Content Customize your page view by dragging and repositioning the boxes below. Riser pipe and the associated couplings are generally sized to be compatible with a speci?

All materials used shall conform to a written speci? Dependability Engineering in System Design and Realization. Assumptions such as load distribution, the correctness of preloading in? Graphic chronological schedule of routine maintenance tasks. Check Out Now Continue Browsing. Each of the signi? Loads can be induced on the coupling from pressure in the lines, imposed de?

The coupling design load can be speci? Log sheets for recording cumulative use of each riser 1r6. Next, the membrane and spwc stress components must be categorized into one of the following stress categories: Some stresses will be affected by the structural properties of the riser pipe. If your institution uses Shibboleth authentication, please contact your site administrator to receive your user name and password. Liquid penetrant examination LP shall be in accordance a;i procedures speci?

For example, when the general primary membrane stress is being checked only general primary membrane stresses are included in Equation 2; secondary stresses, bending stress and local primary membrane stresses are not included.

Sign into or create speec free personal account Sign in via Shibboleth What is Shibboleth? This support constrains the lines to approximate the curvature of the riser pipe. Therefore, the model must be continued far enough away from critical areas to ensure that results are free from boundary effects. API Spec 16R R Requests for permission to reproduce or translate all or any part of the material published herein should also be addressed to the director.

No psec slag inclusion shall be allowed which has a specc equal to or greater than shown in Table 3. These couplings must be analyzed for several values of load, and plots of load versus stress must be developed. Related Posts



Disho These data are to be based on design load wpec High stress areas may be inaccessible and are sometimes so small that a strain gauge gives an average rather than the peak value. IFP has then proposed a simple approach that applies to non-axisymmetric geometries of connectors. Next, the membrane and bending stress components must be categorized into one of the following stress categories: The load on the coupling is axial tension. DesignCouplingsMarine drilling risers. If separation can occur, then provision for it must be included in the analysis if possible.


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Gorisar It is often dif? The following shall be documented and included in the analysis: Cyclic Load Test To simulate in-service load? A secondary stress is any stress in the structure which is not a primary stress or peak stress. Assumptions such as load distribution, the correctness of preloading in? No part of this work may be reproduced, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from the publisher.


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