kSIST FprEN 1515-4:2020

Flanges and their joints - Bolting - Part 4: Selection of bolting for equipment subject to the Pressure Equipment Directive 2014/68/EU

This European Standard is applicable to the selection of bolting for equipment subject to the Pressure Equipment Directive 2014/68/EU.
It specifies standards and additional requirements for dimensions, materials and technical conditions of delivery for bolting.
The bolting selection covered by this European Standard is regarded to be used for combination with flanges according to the series EN 1092 (PN designated flanges) and the series EN 1759 (Class designated flanges).
The selection is based on commonly used materials, bolts and nuts. It covers temperature ranges of the general service of standard flanges (based on PN or Class).
NOTE 1   The bolting selection given may be used in combination with non-standard flanges too provided that the range of application of the equipment for which the bolting is intended to be used is covered. It is the purchaser's option to decide on this.
When selecting bolting according to this European Standard it is essential to take into account other parameters such as type of fluids, corrosion hazards and relaxation at elevated temperatures.
The purpose of this European Standard is to provide a selection of most commonly used bolting types and bolting material combinations as well a tool for easy selection of suitable bolting for equipment.
It is not the intention to specify all possible applications but to give guidance on the most commonly applications. According to this, e.g. application limits for material in the creep range are not explicitly covered in this European Standard but some bolting materials listed (see Table 3, footnote h) are suitable to be used in this temperature range. Wherever the starting material standard provides mechanical properties for this temperature range respective reference is made in Table 3.
NOTE 2   Special services and ambient conditions may require the application of coatings. It is the purchaser's option to decide on this. Depending on the coating used, a verification of the temperature ranges

Flansche und ihre Verbindungen - Schrauben und Muttern - Teil 4: Auswahl von Schrauben und Muttern zur Anwendung im Gültigkeitsbereich der Druckgeräterichtlinie 2014/68/EU

Dieses Dokument gilt für die Auswahl von Schrauben und Muttern für Flanschverbindungen bei Geräten, die der Druckgeräterichtlinie 2014/68/EU unterliegen.
Es legt Normen und zusätzliche Anforderungen an Maße, Werkstoffeigenschaften und technische Liefer-bedingungen für Schrauben und Muttern fest.
ANMERKUNG 1   Unterlagscheiben liegen nicht im Anwendungsbereich dieses Dokuments.
Die Auswahl beruht auf allgemein gebräuchlichen Schrauben und Muttern. Sie umfasst übliche Temperatur¬bereiche für den allgemeinen Betrieb von Flanschen.
Bei der Auswahl von Schrauben und Muttern nach diesem Dokument ist es unerlässlich, Umgebungs-bedingungen und weitere Parameter einschließlich der Art von Fluiden, Korrosionsgefährdungen, des sauren Einsatzbereichs, Sprödbruch bei niedrigen Temperaturen und Relaxation bei erhöhten Temperaturen zu berücksichtigen.
Der Zweck dieses Dokuments ist es, eine Auswahl der gebräuchlichsten Arten und Werkstoffkombinationen von Schrauben und Muttern sowie ein Werkzeug zur einfachen Auswahl geeigneter Schrauben und Muttern für Ausrüstungen bereitzustellen.
Es ist nicht vorgesehen, sämtliche möglichen Anwendungen festzulegen, sondern eine Leitlinie für die gebräuchlichsten Anwendungen bereitzustellen. Beispielsweise werden Anwendungsgrenzen von Werk-stoffen im Zeitstandbereich in diesem Dokument nicht explizit behandelt. Wenn in einer Werkstoffnorm mechanische Eigenschaften für den Zeitstandbereich bereitgestellt werden, wird in Tabelle 3 darauf entsprechend verwiesen.
ANMERKUNG 2   Spezielle Einsatzbereiche und Umgebungsbedingungen könnten das Aufbringen von Beschichtungen erfordern. Die diesbezügliche Entscheidung liegt beim Besteller. In Abhängigkeit von der verwendeten Beschichtung könnte eine Überprüfung der in Tabelle 3 und Tabelle 4 angegebenen Temperaturbereiche erforderlich sein.

Brides et leurs assemblages - Boulonnerie - Partie 4 : Sélection de la boulonnerie pour équipments relevant de la Directive Equipments sous pression 2014/68/EU

La présente Norme européenne est applicable à la sélection de la boulonnerie destinée aux assemblages à brides des équipements relevant de la Directive Équipements sous pression 2014/68/UE.
Elle spécifie les normes et les exigences supplémentaires relatives aux dimensions, matériaux et conditions techniques de livraison applicables à la boulonnerie.
NOTE 1   Les rondelles n’entrent pas dans le domaine d’application du présent document.
La sélection s’appuie sur la boulonnerie couramment utilisée. Elle couvre les plages de température d'usage général des brides.
Lors de la sélection de la boulonnerie conformément au présent document, il est essentiel de tenir compte des conditions environnementales et d'autres paramètres tels que le type de fluide, les risques de corrosion, les applications avec gaz acides, la rupture fragile à basse température et la relaxation à température élevée.
L’objectif du présent document est de fournir une sélection des types de boulonnerie et des combinaisons de matériaux de boulonnerie les plus couramment utilisés afin de mettre à disposition un outil permettant de faciliter le choix d’une boulonnerie appropriée aux équipements sous pression.
Il n’a pas vocation à spécifier toutes les applications possibles mais plutôt à fournir des lignes directrices sur les applications les plus courantes. Par exemple, les limites d'application pour les matériaux dans le domaine du fluage ne sont pas explicitement traitées dans le présent document. Lorsque la norme de matériau de base fournit des propriétés mécaniques pour le domaine du fluage, la référence est indiquée respectivement dans le Tableau 3.
NOTE 2   Des applications spéciales et des conditions à température ambiante peuvent exiger l’application de revêtements. Cette option est laissée à l’initiative de l’acheteur. En fonction du revêtement utilisé, une vérification des plages de température données dans le Tableau 3  et Tableau 4 peut s’avérer nécessaire.

Prirobnice in prirobnični spoji - Vijaki in matice - 4. del: Izbira vijakov in matic za opremo, ki je v skladu z Direktivo o tlačni opremi 2014/68/ES

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 1515-4:2019
01-november-2019

Prirobnice in prirobnični spoji - Vijaki in matice - 4. del: Izbira vijakov in matic za

opremo, ki je v skladu z Direktivo o tlačni opremi 2014/68/EU

Flanges and their joints - Bolting - Part 4: Selection of bolting for equipment subject to

the Pressure Equipment Directive 2014/68/EU
Flansche und ihre Verbindungen - Schrauben und Muttern - Teil 4: Auswahl von

Schrauben und Muttern zur Anwendung im Gültigkeitsbereich der Druckgeräterichtlinie

2014/68/EU

Brides et leurs assemblages - Boulonnerie - Partie 4 : Sélection de la boulonnerie pour

équipments relevant de la Directive Equipments sous pression 2014/68/EU
Ta slovenski standard je istoveten z: prEN 1515-4
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
21.060.20 Matice Nuts
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
oSIST prEN 1515-4:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 1515-4:2019
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oSIST prEN 1515-4:2019
DRAFT
EUROPEAN STANDARD
prEN 1515-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2019
ICS 21.060.10; 21.060.20; 23.040.60 Will supersede EN 1515-4:2009
English Version
Flanges and their joints - Bolting - Part 4: Selection of
bolting for equipment subject to the Pressure Equipment
Directive 2014/68/EU

Brides et leurs assemblages - Boulonnerie - Partie 4 : Flansche und ihre Verbindungen - Schrauben und

Sélection de la boulonnerie pour équipments relevant Muttern - Teil 4: Auswahl von Schrauben und Muttern

de la Directive Equipments sous pression 2014/68/EU zur Anwendung im Gültigkeitsbereich der

Druckgeräterichtlinie 2014/68/EU

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 74.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1515-4:2019 E

worldwide for CEN national Members.
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prEN 1515-4:2019 (E)
Contents Page

European foreword ...................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions, symbols and units ............................................................................................. 5

3.1 Terms and definitions ................................................................................................................................... 5

3.2 Symbols and units ........................................................................................................................................... 6

4 Selection of bolting types and materials ................................................................................................ 7

4.1 General................................................................................................................................................................ 7

4.2 Selection of bolting types ............................................................................................................................. 7

4.3 Selection of bolting material ....................................................................................................................... 7

4.4 Requirements of bolting materials in Table 4 .................................................................................... 10

5 Manufacturing ................................................................................................................................................ 11

5.1 General.............................................................................................................................................................. 11

5.2 Coating .............................................................................................................................................................. 11

6 Technical conditions of delivery ............................................................................................................. 12

6.1 General.............................................................................................................................................................. 12

6.2 Requirements for prevention of brittle fracture at low temperatures ..................................... 12

7 Traceability and inspection documents ............................................................................................... 14

7.1 Traceability ..................................................................................................................................................... 14

7.2 Inspection documents ................................................................................................................................. 14

Annex A (normative) Studs threaded full length ............................................................................................ 16

Annex B (informative) Additional bolting types and materials according to commonly used

national standards ....................................................................................................................................... 17

Annex C (informative) Additional requirements for hot dip galvanized carbon steel bolting ...... 18

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2014/68/EU aimed to be covered ...................................................... 19

Bibliography ................................................................................................................................................................. 20

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European foreword

This document (prEN 1515-4:2019) has been prepared by Technical Committee CEN/TC 74 “Flanges

and their joints”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1515-4:2009

This document has been prepared under a mandate given to CEN by the European Commission and the

European 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 series, Flanges and their joints — Bolting, consists of the following parts:

— Part 1: Selection of bolting
— Part 2: Classification of bolt materials for steel flanges, PN designated
— Part 3: Classification of bolt materials for steel flanges, class designated

— Part 4: Selection of bolting for equipment subject to the Pressure Equipment Directive 2014/68/EU

— Part 1 to become a summary on selection of bolting.
— Part 2 to remain as the standard for PN designated flanges and be updated.

— Part 3 to remain as the standard for Steel Class designated flanges and be updated.

— Part 4 to consideration of other standards which will use parts 1 to 4 was given and although there

is an argument that the parts could be merged, in order to minimize impact on other standards

parts 1 to 4 will all be reviewed and revised.
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1 Scope

This document is applicable to the selection of bolting for flanged joints on equipment subject to the

Pressure Equipment Directive 2014/68/EU.

It specifies standards and additional requirements for dimensions, material properties and technical

conditions of delivery for bolting.
NOTE 1 Washers are not within the scope of this document.

The selection is based on commonly used bolting. It covers common temperature ranges of the general

service of flanges.

When selecting bolting according to this document, it is essential to take into account environmental

conditions and other parameters including type of fluids, corrosion hazards, sour service, low

temperature brittle failure and relaxation at elevated temperatures.

The purpose of this document is to provide a selection of most commonly used bolting types and bolting

material combinations as well a tool for easy selection of suitable bolting for equipment.

It is not the intention to specify all possible applications but to give guidance on the most common

applications. For example, application limits for material in the creep range are not explicitly covered in

this document. Where material standard provides mechanical properties for the creep range, respective

reference is made in Table 3.

NOTE 2 Special services and ambient conditions could require the application of coatings. It is the purchaser's

option to decide on this. Depending on the coating used, a verification of the temperature ranges given in Table 3

and Table 4 could be required.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 1092-1:2018, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN

designated - Part 1: Steel flanges

EN 1759-1:2004, Flanges and their joint - Circular flanges for pipes, valves, fittings and accessories, Class

designated - Part 1: Steel flanges, NPS 1/2 to 24

EN 10269:2013, Steels and nickel alloys for fasteners with specified elevated and/or low temperature

properties
EN 13445-3:2014, Unfired pressure vessels - Part 3: Design
EN 13480-3:2017, Metallic industrial piping - Part 3: Design and calculation

EN ISO 898-1:2013, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts,

screws and studs with specified property classes - Coarse thread and fine pitch thread (ISO 898-1:2013)

EN ISO 898-2:2012, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2: Nuts

with specified property classes - Coarse thread and fine pitch thread (ISO 898-2:2012)

EN ISO 3269:2000, Fasteners - Acceptance inspection (ISO 3269:2000)
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EN ISO 3506-1:2009, Mechanical properties of corrosion-resistant stainless steel fasteners - Part 1: Bolts,

screws and studs (ISO 3506-1:2009)

EN ISO 3506-2:2009, Mechanical properties of corrosion-resistant stainless steel fasteners - Part 2: Nuts

(ISO 3506-2:2009)
EN ISO 4014:2011, Hexagon head bolts - Product grades A and B (ISO 4014:2011)

EN ISO 4017:2014, Fasteners - Hexagon head screws - Product grades A and B (ISO 4017:2014)

EN ISO 4032:2012, Hexagon regular nuts (style 1) - Product grades A and B (ISO 4032:2012)

EN ISO 4033:2012, Hexagon high nuts (style 2) - Product grades A and B (ISO 4033:2012)

EN ISO 16228:2018, LIHSOASFLSFJ
EN ISO 16426:2002, Fasteners - Quality assurance system (ISO 16426:2002)
ISO 261:1998, ISO general purpose metric screw threads — General plan

ISO 965-2:1998, ISO general purpose metric screw threads — Tolerances — Part 2: Limits of sizes for

general purpose external and internal screw threads — Medium quality
ISO 10684:2004, Fasteners — Hot dip galvanized coatings
3 Terms and definitions, symbols and units
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1.1
bolting

type of fastener such as a bolt, screw, stud, tie-rod, reduced shank bolt (also named as necked-down

bolt) or nuts
3.1.2
purchaser
person or organization that orders products in accordance with this document

Note 1 to entry: The purchaser is not necessarily, but may be, a manufacturer of equipment in accordance with

the EU Directive listed in Annex ZA. Where a purchaser has responsibilities under this EU Directive, this document

will provide a presumption of conformity with the essential requirements of the Directive so identified in

Annex ZA.
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3.1.3
bolting manufacturer

person or organization that is responsible for the compliance of the bolting with the requirements of

this document and the referenced standards given for bolting and starting materials agreed with the

purchaser
3.1.4
manufacturing lot

quantity of fasteners of a single designation including product grade, property class and sizes,

manufactured from bar, wire, rod or flat product from a single cast, processed through the same or

similar steps at the same time or over a continuous time period through the same heat treatment

and/or coating, if any
Note 1 to entry: Same heat treatment or coating means:

— for a continuous process, the same treatment cycle without any setting modification;

— for a discontinuous process, the same treatment cycle for identical consecutive loads (batches).

Note 2 to entry: The manufacturing lot may be split into several manufacturing batches for processing purposes

and then reassembled into the same manufacturing lot.
3.1.5
manufacturing lot number

unique number assigned by the bolting manufacturer and which allows full traceability from the

finished product back through all previous steps of the manufacturing operations to a given cast

number of the starting material of manufacture
3.1.6
starting material
material from which the bolt or nut is manufactured

Note 1 to entry: The chemical composition of the starting material shall meet the relevant material standard.

Note 2 to entry: The final heat treatment shall also meet the relevant material standard but can be performed on

the starting material or on the finished bolting.
3.1.7
creep range
temperature range at which a material has time dependent mechanical properties
3.2 Symbols and units
The symbols and respective units used in this document are defined in Table 1.
Table 1 — Symbols and units
Symbol Designation Unit
KV Impact rupture energy J
T Material impact test temperature °C
T Minimum metal temperature of the bolting °C
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4 Selection of bolting types and materials
4.1 General

The selection of bolting types and bolting material combinations for a certain application shall consider

in addition to the requirements covered by this document, the range of application of the equipment for

which the bolting is intended to be used. The selection shall consider all service conditions including

maximum/minimum allowable temperature, required bolt load, tightening method and resultant

stresses, type of fluids, corrosion hazards and if applicable type and material of gasket.

Furthermore it shall be regarded that flanged joints shall remain tight under the expected operating

conditions. Other properties like residual magnetism and relaxation properties shall be evaluated by

the purchaser.

For selection of bolting types and bolting material combinations other than those listed in Table 2,

Table 3 and Table 4 according to commonly used national standards, see Annex B.

Requirements for combination of bolting and flange materials as given in some European Standards

such as EN 13480-3 or EN 13445-3 shall be observed by the user of this document.

The minimum yield strength, tensile strength, and creep of the bolting shall be suitable for the required

bolt load determined for the application and tightening method. Where there is a requirement

concerning the strength category for the bolting given in a flange standard, see EN 1092-1:2018,

EN 1759-1:2004, EN 13480-3:2017, or EN 13445-3:2014, then this shall be observed by the user of this

document.
4.2 Selection of bolting types
Selection of bolting types according to Table 2.
Table 2 — Types of bolting
Dimensional standard
Remarks
Bolts/Studs Nuts
EN ISO 4014 EN ISO 4032 Hexagon head bolt
EN ISO 4033
EN ISO 4017 EN ISO 4032 Hexagon head bolt, threaded full length
EN ISO 4033
Annex A EN ISO 4032 Stud bolt, threaded full length
EN ISO 4033

The user shall determine whether EN ISO 4033 nuts are required for the application. For sizes ≥ M39 nuts

with m = d are recommended.
4.3 Selection of bolting material

A selection of commonly used bolting material combinations and their suitable temperature ranges is

shown in Tables 3 and 4. Combination of bolting materials other than the combinations shown may

reduce the given temperature limits.

For guidance on determining conditions to determine the permissible minimum temperature, see 6.2.

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Table 3 — Selection of bolting material acc. to EN 10269 with suitable temperatures ranges

Steel designation name or property class
Suitable
Type of bolting and description of
temperature Steel designation number
material groups
Line Class
range
Material standard
Bolts, screws,
up to °C Nuts Bolts, screws, studs Nuts
studs
25CrMo4 C35E
C-St
1 All –10 to 300 0,25C-1Cr-Mo 1.7218 1.1181
elev. temp.
EN 10269 EN 10269
42CrMo4 C45E
C-St
2 All –10 to 300 0,42C-1Cr-Mo 1.7225 1.1191
elev. temp.
EN 10269 EN 10269
25CrMo4
25CrMo4
3 All –60 to 500 0,25C-1Cr-Mo 0,25C-1Cr-Mo 1.7218
1.7218
EN 10269
EN 10269
e 42CrMo4
25CrMo4
1.7225
4 All –40 to 400 0,25C-1Cr-Mo 0,42C-1Cr-Mo
1.7218
EN 10269
EN 10269
42CrMo4
42CrMo4
5 All - 40 to 400 0,42C-1Cr-Mo 0,42C-1Cr-Mo 1.7225 1.7225
EN 10269
EN 10269
e 42CrMo4
42CrMo5–6
0,42C-1,3Cr-
1.7225
6 All –10 to 500 0,42C-1Cr-Mo
1.7233
0,6Mo
EN 10269
EN 10269
e 42CrMo4
40CrMoV4–6
0,40C-1Cr-0,6Mo-
1.7225
7 All –10 to 500 0,42C-1Cr-Mo
1.7711
EN 10269
EN 10269
e 21CrMoV5–7
21CrMoV5–7
0,21C-1,3Cr- 0,21C-1,3Cr-0,7Mo-
c 1.7709
8 –10 to 500
All 1.7709
0,7Mo-V V
EN 10269
EN 10269
e 20CrMoVTiB4–10
20CrMoVTiB4–10
0,2C-1Cr-1Mo-V- 0,2C-1Cr-1Mo-V-Ti-
1.7729
9 All –10 to 500
1.7729
Ti-B B
EN 10269
EN 10269
e X6NiCrTiMoVB
X6NiCrTiMoVB
25–15–2
25Ni-15Cr-0,2Ti- 25Ni-15Cr-0,2Ti- 25–15–2
b f
All –60 to 650
Mo-V-B Mo-V-B 1.4980
1.4980
EN 10269
EN 10269
e X22CrMoV12–1 QT2
X22CrMoV12–1 QT2
13 –10 to 500 12Cr-1Mo-V 12Cr-1Mo-V 1.4923 1.4923
All
EN 10269 EN 10269
e X7CrNiMoBNb16–16
X7CrNiMoBNb16–16
16Cr-16Ni-Mo-B-
1.4986
11 All –10 to 500 16Cr-16Ni-Mo-B-Nb
1.4986
EN 10269
EN 10269
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Steel designation name or property class
Suitable
Type of bolting and description of
temperature Steel designation number
material groups
Line Class
range
Material standard
Bolts, screws,
up to °C Nuts Bolts, screws, studs Nuts
studs
X5CrNiMo17–12–2 X5CrNiMo17–12–2
AT 1.4401
PN 40
12 –196 to 550 17Cr-12Ni-2Mo 17Cr-12Ni-2Mo
1.4401 EN 10269
Cl. 300
EN 10269
X5CrNiMo17–12–2 X5CrNiMo17–12–2
PN 100 17Cr-12Ni-2Mo AT+C 1.4401
13 17Cr-12Ni-2Mo
–196 to 200
Cl. 600 AT+C 1.4401 EN 10269
EN 10269
X5CrNi18–10 X5CrNi18–10
AT 1.4301
PN 40
14 –196 to 550 18Cr-10Ni 18Cr-10Ni
1.4301 EN 10269
Cl. 300
EN 10269
X5CrNi18–10 X5CrNi18–10
PN 100 18Cr-10Ni AT+C 1.4301
d a
15 18Cr-10Ni
−60 to 200
Cl. 600 AT+C 1.4301 EN 10269
EN 10269

Allowable stresses for elevated temperatures may be taken from the material in AT condition, as no stresses

exist for the cold worked condition.
Commonly used for PN 160 up to PN 400.
Is limited to be used for max. PN 40/Cl. 300 (low strength bolting).
−200 °C for studs or for bolts manufac
...