bs en 1515-2

BRITISH STANDARD BS EN 1515-2:2001

Flanges and their joints — Bolting —

Part 2: Classification of bolt materials for steel flanges, PN designated

The European Standard EN 1515-2:2001 has the status of a British Standard

ICS 21.060.01; 23.040.60

��

BS EN 1515-2:2001

This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 23 July 2002

© BSI 23 July 2002

ISBN 0 580 40143 X

National forewordThis British Standard is the official English language version of EN 1515-2:2001.

The UK participation in its preparation was entrusted to Technical Committee PSE/15, Flanges, which has the responsibility to:

A list of organizations represented on this committee can be obtained on request to its secretary.

Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard does not of itself confer immunity from legal obligations.

— aid enquirers to understand the text;

— present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed;

— monitor related international and European developments and promulgate them in the UK.

Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page,pages 2 to 19 and a back cover.

The BSI copyright date displayed in this document indicates when thedocument was last issued.

Amendments issued since publication

Amd. No. Date Comments

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 1515-2

December 2001

ICS 21.060.01; 23.040.60

English version

Flanges and their joints - Bolting - Part 2: Classification of boltmaterials for steel flanges, PN designated

Brides et leurs assemblages - Boulonnerie - Partie 2:Classification de matériaux de boulonnerie pour brides en

acier, désignées PN

Flansche und ihre Verbindungen - Schrauben und Muttern -Teil 2: Klassifizierung von Schraubenwerkstoffen für

Stahlflansche, nach PN bezeichnet

This European Standard was approved by CEN on 20 October 2001.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.

CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATIONC OM ITÉ EUR OP ÉEN DE NOR M ALIS AT IONEUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2001 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.

Ref. No. EN 1515-2:2001 E

EN 1515-2:2001 (E)

2

Contentspage

Foreword.................................................................................................................................................. 21 Scope .............................................................................................................. 22 Normative references .............................................................................................................. 23 Combination of materials .............................................................................................................. 34 Classification of bolt materials....................................................................................................... 3Table 1 _ Classification of bolt materials.................................................................................................. 4Annex A (informative) Basic information ............................................................................................ 17Annex ZA (informative) Relationship with EU Directive(s) ................................................................. 19

Foreword

This European Standard has been prepared by Technical Committee CEN/TC 74 "Flanges and their joints", thesecretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an identical textor by endorsement, at the latest by June 2002, and conflicting national standards shall be withdrawn at thelatest by June 2002.

This document has been prepared under a mandate given to CEN by the European Commission and theEuropean Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.

EN 1515 consists of two Parts:

Part 1: Selection of bolting;

Part 2: Classification of bolt materials for steel flanges, PN designated.

The annexes A and ZA are informative.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark,Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.

1 Scope

This European Standard covers the classification of bolt materials combination with the flange material groupsof steel flanges prEN 1092-1 (PN-designated).

Bolt materials are listed in EN 1515-1, flange material groups are listed in prEN 1092-1.

2 Normative references

This European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text’ and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard, only when incorporated in it by amendment or revision. For undated references the latest edition ofthe publication referred to applies (including amendments).

prEN 1092-1, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories,PN designated – Part 1: Steel flanges.

EN 1515-2:2001 (E)

3

EN 1515-1, Flanges and their joints - Bolting - Part 1: Selection of bolting.

EN 10269, Steels and nickel alloys for fasteners for use at elevated and/or low temperature properties.

EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screwsand studs (ISO 898-1:1999).

EN ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners – Part 1: Bolts, screwsand studs (ISO 3506-1:1997).

3 Combination of materials

Bolt materials can be combined with flange material groups as given in Table 1. This table is valid for all flangesfor which pressure temperature (p/T) ratings are given in prEN 1092-1. For flanges which have no p/T ratings(e.g. DN 700 and above), the tables may be used as a guide.

All bolt materials can be used in the range of the p/T ratings given for the flanges. Restrictions due to theclassification shall be observed (see clause 4).

WARNING Bold materials 4.6 and 6.8 are not intended for the use in the scope of the Pressure Equipment Directive.

4 Classification of bolt materials

The classification of bolt materials as given in Table 1 is based on the comparison of the strengths of the flangematerial and the bolt material. The strength ratio r of the flange/bolt combination chosen is compared with thestrength ratio of the flange bolt combination used for the standard flange calculation (see annex A).

For each flange material group the classification is done in three strength levels:

� Low strength: The strength ratio of the chosen flange/bolt combination is less than that used in thestandard flange calculation.These bolts may be used for less severe service, e.g. for water service or in case of oversized flangedjoints. For definition of these service conditions, special experience is necessary otherwise a recalculation ofthe flanged joint shall be done.

� Normal strength: The strength ratio of the chosen flange/bolt combination is similar (within defined limits)to that used in the standard flange calculation.These bolts may be used for all service in the range of the P/T-ratings unless there are other restrictions tothe contrary.

� High strength: The strength ratio of the chosen flange/bolt combination is much more higher than that usedin the standard flange calculation.These bolts may be used in the same range like normal strength level bolting. During assembly however,care should be taken not to overstress the flanges (e. g. by means of torque control).

EN 1515-2:2001 (E)

4

Table 1 _

Classification of bolt materials

Flange materials prEN1092-1

Bolt materials EN 1515-1 Classification

Group Type Material/property class Standard Dia. Line No. Strength1E0 CS 4.6 EN ISO 898-1 All 01

A4-50, A2-50 EN ISO3506-1

<=39 16, 18 Low

X5CrNiMo17-12-2 AT EN 10269 <=160 20X5CrNi18-10 EN 10269 <=160 225.6 EN ISO 898-1 All 026.8 EN ISO 898-1 All 0325CrMo4 EN 10269 <=100 05, 0721CrMoV5-7 EN 10269 <=160 12 NormalX7CrNiMoBNb16-16 EN 10269 <=160 15A4-70, A2-70 EN ISO

3506-1<=24 17, 19

X5CrNiMo17-12-2AT+C

EN 10269 <=160 21

X5CrNi18-10 AT+C EN 10269 <=160 238.8 EN ISO 898-1 All 0442CrMo4 EN 10269 <=60 06, 0830CrNiMo8 EN 10269 <=100 0942CrMo5-6 EN 10269 <=100 10 High40CrMoV4-6 EN 10269 <=100 1120CrMoVTiB4-10 EN 10269 <=160 13X6NiCrTiMoVB 25-15-2 EN 10269 <=160 14

3E0 CS high temp. 4.6 EN ISO 898-1 All 01A4-50,A2-50 EN ISO

3506-1<=39 16, 18 Low

X5CrNiMo17-12-2 AT EN 10269 <=160 20X5CrNi18-10 EN 10269 <=160 225.6 EN ISO 898-1 All 026.8 EN ISO 898-1 All 0325CrMo4 EN 10269 <=100 05, 0721CrMoV5-7 EN 10269 <=160 12 NormalX6NiCrTiMoVB 25-15-2 EN 10269 <=160 14X7CrNiMoBNb16-16 EN 10269 <=160 15A4-70, A2-70 EN ISO

3506-1<=24 17, 19

X5CrNiMo17-12-2AT+C

EN 10269 <=160 21

X5CrNi18-10 AT+C EN 10269 <=160 238.8 EN ISO 898-1 All 0442CrMo4 EN 10269 <=60 06, 0830CrNiMo8 EN 10269 <=100 09 High42CrMo5-6 EN 10269 <=100 1040CrMoV4-6 EN 10269 <=100 1120CrMoVTiB4-10 EN 10269 <=160 13

continued

EN 1515-2:2001 (E)

5

Table 1 (continued)



Group Type Material/property class Standard Dia. Line No. Strength3E1 CS high temp. 4.6 EN ISO

898-1All 01

5.6 EN ISO898-1

All 02

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low

X5CrNiMo17-12-2 AT EN 10269 <=160 20X5CrNi18-10 EN 10269 <=160 226.8 EN ISO

898-1All 03

8.8 EN ISO898-1

All 04

25CrMo4 EN 10269 <=100 05, 0721CrMoV5-7 EN 10269 <=160 1220CrMoVTiB4-10 EN 10269 <=160 13 NormalX6NiCrTiMoVB 25-15-2 EN 10269 <=160 14X7CrNiMoBNb16-16 EN 10269 <=160 15A4-70, A2-70 EN ISO

3506-1<=24 17, 19

X5CrNiMo17-12-2 AT+C EN 10269 <=160 21X5CrNi18-10 AT+C EN 10269 <=160 2342CrMo4 EN 10269 <=60 06, 0830CrNiMo8 EN 10269 <=100 09 High42CrMo5-6 EN 10269 <=100 1040CrMoV4-6 EN 10269 <=100 11

4E0 0,5 Mo 4.6 EN ISO898-1

All 01

5.6 EN ISO898-1

All 02

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 03

8.8 EN ISO898-1

All 04

25CrMo4 EN 10269 <=100 05, 0721CrMoV5-7 EN 10269 <=160 12X6NiCrTiMoVB 25-15-2 EN 10269 <=160 14 NormalX7CrNiMoBNb16-16 EN 10269 <=160 15A4-70, A2-70 EN ISO

3506-1<=24 17, 19

X5CrNiMo17-12-2 AT+C EN 10269 <=160 21X5CrNi18-10 AT+C EN 10269 <=160 2342CrMo4 EN 10269 <=60 06, 0830CrNiMo8 EN 10269 <=100 0942CrMo5-6 EN 10269 <=100 10 High40CrMoV4-6 EN 10269 <=100 1120CrMoVTiB4-10 EN 10269 <=160 13

continued

EN 1515-2:2001 (E)

6

Table 1 (continued)



Group Type Material/property class Standard Dia. Line No. Strength5E0 1Cr-0,5Mo 4.6 EN ISO

898-1All 01

5.6 EN ISO898-1

All 02

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 03

8.8 EN ISO898-1

All 04

25CrMo4 EN 10269 <=100 05, 0742CrMo4 EN 10269 <=60 06, 0842CrMo5-6 EN 10269 <=100 1040CrMoV4-6 EN 10269 <=100 1121CrMoV5-7 EN 10269 <=160 12 Normal20CrMoVTiB4-10 EN 10269 <=160 13X6NiCrTiMoVB 25-15-2 EN 10269 <=160 14X7CrNiMoBNb16-16 EN 10269 <=160 15A4-70, A2-70 EN ISO

3506-1<=24 17, 19

X5CrNiMo17-12-2 AT+C EN 10269 <=160 21X5CrNi18-10 AT+C EN 10269 <=160 2330CrNiMo8 EN 10269 <=100 09 High

6E0 2Cr-1Mo 4.6 EN ISO898-1

All 01

5.6 EN ISO898-1

All 02

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 03

8.8 EN ISO898-1

All 04


3506-1<=24 17, 19


continued

EN 1515-2:2001 (E)

7

Table 1 (continued)



Group Type Material/property class Standard Dia. Line No. Strength6E1 5Cr-1Mo 4.6 EN ISO

898-1All 01

5.6 EN ISO898-1

All 02

6.8 EN ISO898-1

All 03

25CrMo4 EN 10269 <=100 05, 07X7CrNiMoBNb16-16 EN 10269 <=160 15A4-50,A2-50 EN ISO

3506-1<=39 16, 18 Low

A4-70, A2-70 EN ISO3506-1

<=24 17, 19

X5CrNiMo17-12-2 AT EN 10269 <=160 20X5CrNiMo17-12-2 AT+C EN 10269 <=160 21X5CrNi18-10 EN 10269 <=160 22X5CrNi18-10 AT+C EN 10269 <=160 238.8 EN ISO

898-1All 04

42CrMo4 EN 10269 <=60 06, 0830CrNiMo8 EN 10269 <=100 0942CrMo5-6 EN 10269 <=100 10 Normal40CrMoV4-6 EN 10269 <=100 1121CrMoV5-7 EN 10269 <=160 1220CrMoVTiB4-10 EN 10269 <=160 13X6NiCrTiMoVB 25-15-2 EN 10269 <=160 14

7E0 CS low temp. 4.6 EN ISO898-1

All 01

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 02

6.8 EN ISO898-1

All 03

25CrMo4 EN 10269 <=100 05, 0721CrMoV5-7 EN 10269 <=160 12X6NiCrTiMoVB 25-15-2 EN 10269 <=160 14 NormalX7CrNiMoBNb16-16 EN 10269 <=160 15A4-70, A2-70 EN ISO

3506-1<=24 17, 19

X5CrNiMo17-12-2 AT+C EN 10269 <=160 21X5CrNi18-10 AT+C EN 10269 <=160 238.8 EN ISO 898-

1All 04

42CrMo4 EN 10269 <=60 06, 0830CrNiMo8 EN 10269 <=100 09 High42CrMo5-6 EN 10269 <=100 1040CrMoV4-6 EN 10269 <=100 1120CrMoVTiB4-10 EN 10269 <=160 13

continued

EN 1515-2:2001 (E)

8

Table 1 (continued)



Group Type Material/property class Standard Dia. Line No. Strength7E1 CS low temp. 4.6 EN ISO

898-1All 01

5.6 EN ISO898-1

All 02

A4-50,A2-50 EN ISO3506-1

<=39 16, 18

X5CrNiMo17-12-2 AT EN 10269 <=160 20 LowX5CrNiMo17-12-2 AT+C EN 10269 <=160 21X5CrNi18-10 EN 10269 <=160 22X5CrNi18-10 AT+C EN 10269 <=160 236.8 EN ISO

898-1All 03

8.8 EN ISO898-1

All 04

25CrMo4 EN 10269 <=100 05, 0742CrMo4 EN 10269 <=60 06, 0842CrMo5-6 EN 10269 <=100 1040CrMoV4-6 EN 10269 <=100 11 Normal21CrMoV5-7 EN 10269 <=160 1220CrMoVTiB4-10 EN 10269 <=160 13X6NiCrTiMoVB 25-15-2 EN 10269 <=160 14X7CrNiMoBNb16-16 EN 10269 <=160 15A4-70, A2-70 EN ISO

3506-1<=24 17, 19

30CrNiMo8 EN 10269 <=100 09 High7E2 9Ni 4.6 EN ISO

898-1All 01

5.6 EN ISO898-1

All 02

6.8 EN ISO898-1

All 03

25CrMo4 EN 10269 <=100 05, 0721CrMoV5-7 EN 10269 <=160 12X7CrNiMoBNb16-16 EN 10269 <=160 15 LowA4-50,A2-50 EN ISO

3506-1<=39 16, 18

A4-70, A2-70 EN ISO3506-1

<=24 17, 19


898-1All 04

42CrMo4 EN 10269 <=60 06, 0830CrNiMo8 EN 10269 <=100 0942CrMo5-6 EN 10269 <=100 10 Normal40CrMoV4-6 EN 10269 <=100 1120CrMoVTiB4-10 EN 10269 <=160 13X6NiCrTiMoVB 25-15-2 EN 10269 <=160 14

continued

EN 1515-2:2001 (E)

9

Table 1 (continued)



Group Type Material/property class Standard Dia. Line No. Strength7E3 1,4Mn-0,5Ni 4.6 EN ISO

898-1All 01

5.6 EN ISO898-1

All 02

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 03

8.8 EN ISO898-1

All 04


3506-1<=24 17, 19


8E0 CS fine grain 4.6 EN ISO898-1

All 01

5.6 EN ISO898-1

All 02

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 03

8.8 EN ISO898-1

All 04

25CrMo4 EN 10269 <=100 05, 0742CrMo5-6 EN 10269 <=100 1040CrMoV4-6 EN 10269 <=100 1121CrMoV5-7 EN 10269 <=160 12 Normal20CrMoVTiB4-10 EN 10269 <=160 13X6NiCrTiMoVB 25-15-2 EN 10269 <=160 14X7CrNiMoBNb16-16 EN 10269 <=160 15A4-70, A2-70 EN ISO

3506-1<=24 17, 19

X5CrNiMo17-12-2 AT+C EN 10269 <=160 21X5CrNi18-10 AT+C EN 10269 <=160 2342CrMo4 EN 10269 <=60 06, 08 High30CrNiMo8 EN 10269 <=100 09

continued

EN 1515-2:2001 (E)

10

Table 1 (continued)



Group Type Material/property class Standard Dia. Line No. Strength8E1 CS fine grain 4.6 EN ISO

898-1All 01

5.6 EN ISO898-1

All 02

A4-50,A2-50 EN ISO3506-1

<=39 16, 18


898-1All 03

8.8 EN ISO898-1

All 04


3506-1<=24 17, 19

30CrNiMo8 EN 10269 <=100 09 High8E2 CS fine grain 4.6 EN ISO

898-1All 01

5.6 EN ISO898-1

All 02

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 03

8.8 EN ISO898-1

All 04

25CrMo4 EN 10269 <=100 05, 0742CrMo5-6 EN 10269 <=100 1040CrMoV4-6 EN 10269 <=100 1121CrMoV5-7 EN 10269 <=160 1220CrMoVTiB4-10 EN 10269 <=160 13 NormalX6NiCrTiMoVB 25-15-2 EN 10269 <=160 14X7CrNiMoBNb16-16 EN 10269 <=160 15A4-70, A2-70 EN ISO

3506-1<=24 17, 19


continued

EN 1515-2:2001 (E)

11

Table 1 (continued)



Group Type Material/property class Standard Dia. Line No. Strength8E3 CS fine grain 4.6 EN ISO

898-1All 01

5.6 EN ISO898-1

All 02

A4-50,A2-50 EN ISO3506-1

<=39 16,18


898-1All 03

8.8 EN ISO898-1

All 04


3506-1<=24 17, 19

30CrNiMo8 EN 10269 <=100 09 High9E0 11CR-1Mo-V 4.6 EN ISO

898-1All 01

5.6 EN ISO898-1

All 02

6.8 EN ISO898-1

All 03

25CrMo4 EN 10269 <=100 05, 0721CrMoV5-7 EN 10269 <=160 12X6NiCrTiMoVB 25-15-2 EN 10269 <=160 14X7CrNiMoBNb16-16 EN 10269 <=160 15 LowA4-50,A2-50 EN ISO

3506-1<=39 16, 18

A4-70, A2-70 EN ISO3506-1

<=24 17, 19


898-1All 04

42CrMo4 EN 10269 <=60 06, 0830CrNiMo8 EN 10269 <=100 09 Normal42CrMo5-6 EN 10269 <=100 1040CrMoV4-6 EN 10269 <=100 1120CrMoVTiB4-10 EN 10269 <=160 13

continued

EN 1515-2:2001 (E)

12

Table 1 (continued)



Group Type Material/property class Standard Dia. Line No. Strength10E0 19Cr-10Ni 4.6 EN ISO

898-1All 01

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 02

6.8 EN ISO898-1

All 03

25CrMo4 EN 10269 <=100 05, 07X7CrNiMoBNb16-16 EN 10269 <=160 15 NormalA4-70, A2-70 EN ISO

3506-1<=24 17, 19

X5CrNiMo17-12-2 AT+C EN 10269 <=160 21X5CrNi18-10 AT+C EN 10269 <=160 238.8 EN ISO

898-1All 04

42CrMo4 EN 10269 <=60 06, 0830CrNiMo8 EN 10269 <=100 0942CrMo5-6 EN 10269 <=100 10 High40CrMoV4-6 EN 10269 <=100 1121CrMoV5-7 EN 10269 <=160 1220CrMoVTiB4-10 EN 10269 <=160 13X6NiCrTiMoVB 25-15-2 EN 10269 <=160 14

10E1 18Cr-10Ni-N 4.6 EN ISO898-1

All 01

5.6 EN ISO898-1

All 02

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 03

8.8 EN ISO898-1

All 04

25CrMo4 EN 10269 <=100 05, 0742CrMo5-6 EN 10269 <=100 1040CrMoV4-6 EN 10269 <=100 1121CrMoV5-7 EN 10269 <=160 12 Normal20CrMoVTiB4-10 EN 10269 <=160 13X6NiCrTiMoVB 25-15-2 EN 10269 <=160 14X7CrNiMoBNb16-16 EN 10269 <=160 15A4-70, A2-70 EN ISO

3506-1<=24 17, 19


continued

EN 1515-2:2001 (E)

13

Table 1 (continued)



Group Type Material/property class Standard Dia. Line No. Strength11E0 18Cr-10Ni 4.6 EN ISO

898-1All 01

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 02

6.8 EN ISO898-1

All 03


3506-1<=24 17, 19


898-1All 04


12E0 18Cr-10Ni-Ti 4.6 EN ISO898-1

All 01

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 02

6.8 EN ISO 898-1

All 03

25CrMo4 EN 10269 <=100 05, 07 NormalX7CrNiMoBNb16-16 EN 10269 <=160 15A4-70, A2-70 EN ISO

3506-1<=24 17, 19


898-1All 04


continued

EN 1515-2:2001 (E)

14

Table 1 (continued)



Group Type Material/property class Standard Dia. Line No. Strength13E0 17Cr-12Ni-2Mo A4-50,A2-50 EN ISO

3506-1<=39 16, 18

X5CrNiMo17-12-2 AT EN 10269 <=160 20 LowX5CrNi18-10 EN 10269 <=160 224.6 EN ISO

898-1All 01

5.6 EN ISO898-1

All 02

6.8 EN ISO898-1

All 03

25CrMo4 EN 10269 <=100 05, 07 NormalX7CrNiMoBNb16-16 EN 10269 <=160 15A4-70, A2-70 EN ISO

3506-1<=24 17, 19


898-1All 04


13E1 17Cr-11Ni-2Mo-N 4.6 EN ISO898-1

All 01

5.6 EN ISO898-1

All 02

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 03

8.8 EN ISO898-1

All 04


3506-1<=24 17, 19


continued

EN 1515-2:2001 (E)

15

Table 1 (continued)



Group Type Material/property class Standard Dia. Line No. Strength14E0 17Cr-12Ni-2Mo 4.6 EN ISO

898-1All 01

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 02

6.8 EN ISO898-1

All 03


3506-1<=24 17, 19


898-1All 04


15E0 17Cr-12Ni-2Mo 4.6 EN ISO898-1

All 01

A4-50,A2-50 EN ISO3506-1

<=39 16, 18 Low


898-1All 02

6.8 EN ISO898-1

All 03


3506-1<=24 17, 19


898-1All 04


continued

EN 1515-2:2001 (E)

16

Table 1 (concluded)



Group Type Material/property class Standard Dia. Line No. Strength16E0 25Cr-6Ni-3Cu-N 4.6 EN ISO

898-1All 01

5.6 EN ISO898-1

All 02

6.8 EN ISO898-1

All 03

25CrMo4 EN 10269 <=100 05, 0721CrMoV5-7 EN 10269 <=160 12X7CrNiMoBNb16-16 EN 10269 <=160 15A4-50,A2-50 EN ISO

3506-1<=39 16, 18 Low

A4-70, A2-70 EN ISO3506-1

<=24 17, 19


898-1All 04

42CrMo4 EN 10269 <=60 06, 0830CrNiMo8 EN 10269 <=100 0942CrMo5-6 EN 10269 <=100 10 Normal40CrMoV4-6 EN 10269 <=100 1120CrMoVTiB4-10 EN 10269 <=160 13X6NiCrTiMoVB 25-15-2 EN 10269 <=160 14

EN 1515-2:2001 (E)

17

Annex A(informative)

Basic information

This annex describes the rules under which the tables of this standard have been developed.

A.1 Definitions

� Flange calculation model : PN designated steel flanges, for which p/t ratings are given (see prEN 1092-1)have been calculated at ambient temperature with a flange material yield stress of 225 N/mm² and a boltmaterial yield stress of 300 N/mm². This is the calculation model for the flanges.

� Classification: Bolt materials are set in relation to flange material groups and classified on the basis of theirstrength. Starting from the flange calculation model classification of the bolt material is done as given in thisannex A. (See also prEN 1092-1 annex F: Determination of p/T ratings for flanges using EN materials.)

� r: stress ratio for classification of the bolt material (see also clause 4)

� r min: minimum value of all stress ratios of one flange material to one bolt material calculated over alltemperatures.

� r 20: stress ratio at 20 °C of one flange material to one bolt material.

A.2 Combination of flange and bolt materials

From each flange material group (e.g. group 3E0) the material with the lowest stress at 20 °C has been selectedfor the calculations of this group (Cast stainless steel has not been used, as the stress values are too low). Thep/T ratings of the flanges itself has been calculated with the lowest value of a material group.

This material is combined with each bolt material given in EN 1515-1 and the stress ratio r is calculated for alltemperatures.

The results are evaluated for the classification of the bolt material.

A.3 Calculation

Calculation method of Stress Ratio r:

gm = Smf / Smb = 225 / 300

g = STf / STb

r = gm / g = [225 / 300] / [STf / STb]

g = Stress ratio for a flange/bolt combination at temperaturegm = Stress ratio for calculation modelSmf = Flange material stress for flange calculation model at 20 °C (= 225 N/mm²)Smb = Bolt material stress for calculation model at 20 °C (= 300 N/mm²)STf = Flange material stress at temperature (N/mm²)STb = Bolt material stress at temperature (N/mm²)r = Stress ratio model/combination

EN 1515-2:2001 (E)

18

A.4 Classification

The bolt materials combined with a flange material group are classified in low – normal – high strength (see alsoclause 4).

The minimum value of r (r min) and the value at 20 °C (r 20) of one flange material to one bolt materialcalculated over all temperatures is used for the classification (e.g. flange material group 3E0 compared with boltmaterial 5.6 and temperatures from 20 °C to 300 °C).

Stress ratio r below 1 means: Bolts are weaker than calculation modelStress ratio r above 1 means: Bolts are stronger than calculation model

Classification has been done according to the following criteria:

� Low strength: for bolt materials with r min � 0,9;� Normal strength: for bolt materials with r min � 0,9 & r 20 < 2;� High strength: for bolt materials with r 20 � 2.

EN 1515-2:2001 (E)

19

Annex ZA(informative)

Relationship with EU Directive(s)

Clauses of this European Standard addressing essential requirements orother provisions of EU Directives

This European Standard has been prepared under a mandate given to CEN by the European Commission andthe European Free Trade Association (EFTA) and supports essential requirements of EU Directive 97/23/EC(Pressure Equipment Directive, PED).

WARNING: Other requirements and other EU Directives may be applicable to the products falling within thescope of this standard.

The following clauses of this standard are likely to support requirements of Directive 97/23/EC.

Compliance with the clauses of this standard provides one means of conforming with the specific essentialrequirements of the Directive concerned and associated EFTA regulations.

Table ZA.1 - Correspondence between this European Standard and Directive 97/23/EC

Clause/subclause

of thisEuropeanStandard

Essential requirements (ER’s)of Directive 97/23/EC

Qualifyingremarks/

notes

3 and 4 Annex 1,Clause 4

Materials:Materials for pressure equipment to be suitable during lifetime- unless replacement is foreseen.

-

Annex 1,Clause 4.1a)

Materials for pressurized parts to have appropriate propertiesfor all operating and test conditions:- to be sufficiently ductile and tough;- characteristics of material to comply with ESR's at 7.5- to be selected in order to prevent brittle-type fracture, orappropriate measures to be taken.

-

BS EN 1515-2:2001

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