ДСТУ EN 12952-3:2015 Котлы водотрубные и вспомогательное оборудование. Часть 3. Проектирование и расчет относительно составляющих котлов, находящихся под давлением (EN 12952-3:2011, IDT)

ПІДТВЕРДЖУВАЛЬНЕ ПОВІДОМЛЕННЯ

Державне підприємство
«Український науково-дослідний і навчальний центр
проблем стандартизації, сертифікації та якості»
(   
(ДП «УкрНДНЦ»))

Наказ від 25.12.2015 № 207
(у редакції наказу від 20.05.2016 № 137)

EN 12952-3:2011

Water-tube boilers and auxiliary installations – Part 3: Design and calculation for pressure parts of the boiler

прийнято як національний стандарт
методом «підтвердження» за позначенням
 

ДСТУ EN 12952-3:2015
(EN 12952-3:2011, IDT)

Котли водотрубні та допоміжне устатковання. Частина 3. Проектування та обчислення стосовно
складників котлів, що перебувають під тиском

З наданням чинності від 2016–01–01

Contents

Foreword

1 Scope

2 Normative references

3 Terms and definitions

4 Symbols and abbreviations

5 General

5.1 Purpose

5.2 Dimensions of pressure parts

5.3 Strength of pressure parts

5.4 Design by analysis

5.5 Cyclic loading

5.6 Other design requirements

5.7 Design, calculation and test pressures

5.8 Metal wastage

5.9 Attachment on pressure parts

6 Calculation temperature and nominal design stress

6.1 Calculation temperature

6.2 Maximum through-the-wall temperature difference and maximum flue gas temperature for heated drums and headers

6.3 Design stress

7 Cylindrical shells of drums and headers under internal pressure

7.1 Shell thickness

7.2 Basic calculation

7.3 Combined stress in drum or header shells

7.4 Boiler drum supports

7.5 Other stresses in cylindrical shells

8 Openings and branches in cylindrical shells of drums and headers and integral tubes

8.1 General

8.2 Efficiency factor, calculation by way of approximation, and maximum diameter of unreinforced openings

8.3 Design of openings and branches in cylindrical shells (efficiency and reinforcement)

8.4 Bolted connections

8.5 Screwed and socket welded connections

9 Headers and plain tubes of rectangular section

9.1 General

9.2 Symbols and abbreviations

9.3 Required wall thickness

10 Ends and spherical shells

10.1 Symbols and abbreviations

10.2 Spherical shells and dished heads

10.3 Unstayed flat ends

10.4 Flat unstayed closures

11 Tubes

11.1 Symbols and abbreviations

11.2 Thickness of straight boiler tubes

11.3 Thickness of tube bends and elbows

11.4 Flexibility of integral tubing systems

11.5 Structural attachments to tubes

11.6 Fitting and joining of heated tubes

11.7 Joining of unheated tubes

12 Pressure parts of irregular shape

12.1 Hydrostatic test for determining the allowable internal pressure

12.2 Numerical methods

13 Fatigue

13.1 General

13.2 Symbols and abbreviations

13.3 Exemption rule for fatigue analysis

13.4 Stress analysis for fatigue calculation

13.5 Example calculations

Annex A (normative) Calculation of tube bends and elbows

Annex B (normative) Fatigue cracking – Design to allow for fluctuating stress

Annex C (informative) Examples of calculating the effects of fatigue

Annex D (informative) Physical properties of steels

Annex E (informative) Significant technical changes between this European Standard and the previous edition

Annex ZA (informative) Clauses of this European Standard addressing essential safety requirements of the Pressure Equipment Directive 97/23/EC

Bibliography