Status: Alert Withdrawn.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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An example of a pure shear stress is the average shear stress in the threads of a threaded coupling. When L is less than D, consider as a plate of T thickness.

This situation presents a real challenge for the design of the drilling riser which depends to a large extent apo these parameters, as well as other related to operational and environmental conditions. Sign into or create your free personal account.

API Product Specification

Extended testing can be conducted to compare with fatigue life predictions. Results of SAF and peak stress calculations in accordance with 4.

Coupling capacity ratings are established to enable the grouping of coupling models according to their maximum stresses developed under apu levels of loading, regardless of manufacturer or method of make-up.

Nothing contained in any API publication is to be construed as granting any right, by implication or otherwise, for the manufacture, sale, or use of any method, apparatus, or product covered by letters patent. When simulating the spider hangoff loads, only the box or pin end whichever hangs in the spider should be loaded. Neither should anything contained in the publication be construed as insuring anyone against liability for infringement of letters patent.


It is, therefore, incumbent upon the designer to endeavor to minimize the conditions leading to the initiation and propagation of fatigue cracks. Sometimes a one-time extension of up to two years will be added to this review cycle. Procedure and schedule for fatigue crack inspections. Sign into or create your free personal account Sign in via Shibboleth What is Shibboleth?

API Product Specification

The test coupling for all veri? For example, a coupling having six planes of symmetry would require analysis of a degree sector one-twelfth.

Coupling makeup including when applicable, detailed procedures for correctly applying coupling preload. Each of the signi?

Determining the area used for averaging a local stress requires judgement. A primary stress is one that speec induced by the external loads or preload and is necessary to satisfy the laws of static equilibrium. The female coupling member. Design loads tensile, bending, loads from auxiliary lines, and others as de? To qualify for a particular rated load, neither calculated nor measured stresses in a coupling shall exceed the allowable stress limits of the coupling material when subjected to the spef load.

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. Assumptions such as load distribution, the correctness of preloading in?

API Spec 16R (R2010)

Analysis of the effects of preload and the possibility of separation may require special treatment in the? Design Couplings Marine drilling risers. All components that affect the stiffness of the coupling shall be considered in the model. As recommended by API Spec 16R, the stress linearization and classification in one of the key steps to design a riser connector.


Surface porosity and exposed slag are not permitted on or within surfaces. Inherent indications not associated with a surface rupture for example, magnetic permeability variations and non-metallic stringers are considered non-relevant.

This can result in large permanent deformations, but not in structural zpi. It replaces the multiple user names and passwords necessary to access subscription-based content with a single user name and password that can be entered once per session.

API Spec 16R (R)

A simple approach to extend the stress linearization and classification methods to three-dimensional FEA is proposed. This support constrains the lines to approximate the curvature of the riser pipe. The testing has two primary objectives: Generally, API standards are reviewed and revised, reaf? In addition, the following steps are required. The following procedure shall be used for an individual coupling design: If not possible, then an iterative method involving several solutions shall be required.

Local peak stresses are not considered for static loading, but are of primary concern for evaluating fatigue life as discussed in 4.