FEA Procedure

Ver. Status Issue date Made by Checked & Approved by

01 CR 08/05/14 J.M.Lodge P.Sharples

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OUTLINE TECHNICAL PROPOSAL FINITE ELEMENT ANALYSIS

PROJECT CTL000355 Maharaja Lela 3 Platform

OT-000SC4

OUTLINE TECHNICAL PROPOSAL Document: OT-000SC2

FINITE ELEMENT ANALYSIS Version: 01

TECHNIP PROJECT 72267 Issue date: 08.05.2014

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Document Revision History

Rev Date Description of change Reason for change

01 16.12.2014 First issue None




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TABLE OF CONTENTS

1.0 INTRODUCTION ............................................................................................................................. 4

1.1 General Summary ............................................................................................................................ 4

1.2 Valve Analysis ................................................................................................................................. 4




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1.0 INTRODUCTION

1.1 General Summary

Design verification using F.E. Analysis shall be performed on the following:-

1. Valve

This is additional to the primary design validation report for the valve which is signed off by the notified body. Analysis will be performed on models created from final manufacturing drawings, critical components to be modelled in minimum metal condition, and any weld overlay will be excluded. Any model simplification to aid mesh creation will not favourably bias components. Analysis will be performed on Solidworks Simulation 2013 software.

1.2 Valve Analysis

This analysis shall be performed for valve tag numbers 21-PV-710004

1) Objective A linear elastic analysis shall be performed on the valve primary pressure boundary comprising of the following components, valve body, bonnet and gland. The analysis considers internal pressure and associated loads as well as any piping loads and moments established by consultation with the client. The stress limits where applicable are taken from API 6A/ISO 10423 and the analysis shall show the valve assembly is compliant with the code. 2) Load Cases Two load cases are proposed, the a) hydrostatic test condition and b) design condition.

a) The hydrostatic test condition shall use the hydrostatic test pressure as specified in API

6A/ISO 10423. Operating loads will not be applied, and piping loads can be applied if

requested and provided by the client.

b) The design condition shall use the maximum design pressure as specified in API 6A/ISO

10423, and the maximum design temperature stated in the project specification. Maximum

operating loads will be applied to this load case along with the piping loads/moments

provided by the client. Material mechanical properties will be de-rated in accordance with

relevant standards where necessary.

3) Boundary Conditions

The Valve shell assembly shall be fixed at one of the flange faces, internal pressure shall be applied to all the internally wetted surfaces. An axial end load will be applied to the non fixed end to simulate line isolation downstream of the valve. Bonnet end load due to the seal retaining load and maximum operating load (load case dependent) will be applied to the bonnet. The closure bolting pre-load will be applied to the bonnet and gland bolting faces. This will simulate the as built valve, using torque values taken from the build procedure. External hyperbaric pressure will be ignored as the increased pressure differential across the shell will result in a more onerous condition.




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4) Report

Findings from the F.E. Analysis shall be reported in a design report and submitted to the client for approval. Membrane stress intensity will be found by stress linearisation and compared against limits given in API 6A/ISO 10423. Deflections in the bonnet, gland and primary sealing face will be assessed to check for integrity and operability.

FEA Procedure

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