OS-C501

Offshore Standard DNV-OS-C501, November 2013
Contents – Page 5
CONTENTS
CHANGES – CURRENT ................................................................................................................... 3
Sec. 1 General............................................................................................................................... 15
1 Objectives................................................................................................................................................. 15
1.1 Objectives ...................................................................................................................................... 15
2 Application - scope ................................................................................................................................ 15
2.1 General........................................................................................................................................... 15
3 How to use the standard ......................................................................................................................... 15
3.1 Users of the standard...................................................................................................................... 15
3.2 Flow chart of the standard.............................................................................................................. 16
3.3 How to use the standard................................................................................................................. 16
4 Normative references .............................................................................................................................. 17
4.1 Offshore service specifications...................................................................................................... 17
4.2 Offshore Standards......................................................................................................................... 17
4.3 Recommended practices ................................................................................................................ 17
4.4 Rules .............................................................................................................................................. 17
4.5 Standards for certification and classification notes ....................................................................... 17
4.6 Other references............................................................................................................................. 17
Sec. 2 Design philosophy and design principles........................................................................ 18
1 General ..................................................................................................................................................... 18
1.1 Objective........................................................................................................................................ 18
2 Safety philosophy..................................................................................................................................... 18
2.1 General........................................................................................................................................... 18
2.2 Risk assessment ............................................................................................................................. 18
2.3 Quality assurance........................................................................................................................... 18
3 Design format........................................................................................................................................... 18
3.1 General principles .......................................................................................................................... 18
3.2 Limit states..................................................................................................................................... 19
3.3 Safety classes and service classes.................................................................................................. 19
3.4 Failure types................................................................................................................................... 20
3.5 Selection of partial safety factors .................................................................................................. 20
3.6 Design by LRFD method............................................................................................................... 20
3.7 Structural Reliability Analysis....................................................................................................... 23
4 Design approach ...................................................................................................................................... 23
4.1 Approaches .................................................................................................................................... 23
4.2 Analytical approach ....................................................................................................................... 23
4.3 Component testing ......................................................................................................................... 24
4.4 Analyses combined with updating................................................................................................. 24
5 Requirements to documentation............................................................................................................ 24
5.1 Design Drawings and Tolerances .................................................................................................. 24
5.2 Guidelines for the design report..................................................................................................... 24
Sec. 3 Design input....................................................................................................................... 25
1 Introduction ............................................................................................................................................. 25
1.1 ........................................................................................................................................................ 25
2 Product specifications ............................................................................................................................. 25
2.1 General function or main purpose of the product .......................................................................... 25
3 Division of the product or structure into components, parts and details........................................... 25
3.1 ........................................................................................................................................................ 25
4 Phases ....................................................................................................................................................... 26
4.1 Phases............................................................................................................................................. 26
5 Safety and service classes........................................................................................................................ 26
5.1 Safety classes ................................................................................................................................. 26
5.2 Service classes ............................................................................................................................... 26
6 Functional requirements......................................................................................................................... 26
6.1 ........................................................................................................................................................ 26
7 Failure modes........................................................................................................................................... 27
7.1 General........................................................................................................................................... 27
7.2 Failure modes................................................................................................................................. 27
DET NORSKE VERITAS AS