oSIST prEN 14870-4:2021

Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline transportation systems - Part 4: Factory cold bends (ISO 15590-4:2019, modified)

This document specifies the technical delivery conditions for bends made by the cold bending process for bend with radii 5xOD or higher for use in pipeline transportation systems for the petroleum and natural gas industries as defined in ISO 13623.
NOTE 1   ISO 13623 is modified adopted as EN 14161 to exclude on-land supply systems used by the European gas supply industry from the input of gas into the on-land transmission network up to the inlet connection of gas appliances.
This document also specifies the requirements for the manufacture of two product specification levels (PSLs) of cold bends corresponding to product specification levels given for pipe in ISO 3183. This document is applicable to cold bends made from seamless and welded pipe of unalloyed or low-alloy steels.
NOTE 2   These are typically C-Mn steels or low-alloy steels that are appropriate for the corresponding level and grade of line pipe in accordance with ISO 3183.
This document is not applicable to the selection of the cold bend product specification level. It is the responsibility of the purchaser to specify the PSL, based upon the intended use and design requirements.
NOTE 3   See also ISO 3183:2012, Introduction.
This document is not applicable to field cold bends and pipeline bends made by other manufacturing processes.
On-land supply systems used by the European gas supply industry from the input of gas into the on-land transmission network up to the inlet connection of gas appliances are excluded from the scope of this document.

Erdöl- und Erdgasindustrie - Induktionsbögen, Zubehörteile und Flansche für Fernleitungen - Teil 4: Durch werkseitige Kaltverformung gefertigte Rohrbögen (ISO 15590-4:2019, modifiziert)

Industries du pétrole et du gaz naturel - Coudes d'induction, raccords et brides pour systèmes de transport par conduites - Partie 4 : XXX (ISO 15590-4:2019, modifié)

Industrija za predelavo nafte in zemeljskega plina - Indukcijska cevna kolena, fitingi in prirobnice za naftovodne transportne sisteme - 4. del: Tovarniško hladno upognjena cevna kolena (ISO 15590-4:2019, spremenjen)

General Information

• Status: Not Published
• Public Enquiry End Date: 30-Sep-2021
• ICS: 75.200 - Petroleum products and natural gas handling equipment
• ICS: 83.140.30 - Plastics pipes and fittings for non fluid use
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 29-Jul-2021
• Due Date: 16-Dec-2021
• Completion Date: 25-Aug-2021
• Ref Project: prEN 14870-4 - Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline transportation systems - Part 4: Factory cold bends (ISO 15590-4:2019, modified)

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 14870-4:2021
01-september-2021
Industrija za predelavo nafte in zemeljskega plina - Indukcijska cevna kolena,

fitingi in prirobnice za naftovodne transportne sisteme - 4. del: Tovarniško hladno

upognjena cevna kolena (ISO 15590-4:2019, spremenjen)

Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline

transportation systems - Part 4: Factory cold bends (ISO 15590-4:2019, modified)
Erdöl- und Erdgasindustrie - Induktionsbögen, Zubehörteile und Flansche für

Fernleitungen - Teil 4: Durch werkseitige Kaltverformung gefertigte Rohrbögen (ISO

15590-4:2019, modifiziert)

Industries du pétrole et du gaz naturel - Coudes d'induction, raccords et brides pour

systèmes de transport par conduites - Partie 4 : XXX (ISO 15590-4:2019, modifié)
Ta slovenski standard je istoveten z: prEN 14870-4
ICS:
75.200 Oprema za skladiščenje Petroleum products and
nafte, naftnih proizvodov in natural gas handling
zemeljskega plina equipment
83.140.30 Polimerne cevi in fitingi za Plastics pipes and fittings for
snovi, ki niso tekočine non fluid use
oSIST prEN 14870-4:2021 en,fr,de

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

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oSIST prEN 14870-4:2021
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oSIST prEN 14870-4:2021
DRAFT
EUROPEAN STANDARD
prEN 14870-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2021
ICS 75.200
English Version
Petroleum and natural gas industries - Induction bends,
fittings and flanges for pipeline transportation systems -
Part 4: Factory cold bends (ISO 15590-4:2019, modified)

Industries du pétrole et du gaz naturel - Coudes Erdöl- und Erdgasindustrie - Induktionsbögen,

d'induction, raccords et brides pour systèmes de Zubehörteile und Flansche für Fernleitungen - Teil 4:

transport par conduites - Partie 4 : XXX (ISO 15590- Durch werkseitige Kaltverformung gefertigte

4:2019, modifié) Rohrbögen (ISO 15590-4:2019, modifiziert)

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

CEN/TC 12.

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

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14870-4:2021 E

worldwide for CEN national Members.
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oSIST prEN 14870-4:2021
prEN 14870-4:2021 (E)
Contents Page

European foreword ...................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 8

4 Symbols and abbreviated terms .............................................................................................................. 11

4.1 Symbols ............................................................................................................................................................ 11

4.2 Abbreviated terms ........................................................................................................................................ 11

5 General requirements ................................................................................................................................. 12

5.1 Units of measurement ................................................................................................................................. 12

5.2 Rounding .......................................................................................................................................................... 12

5.3 Conformance to this document ................................................................................................................ 12

6 Designation of cold bends .......................................................................................................................... 12

7 Pressure rating and design ....................................................................................................................... 13

8 Information provided by the purchaser ............................................................................................... 13

8.1 General information .................................................................................................................................... 13

8.2 Additional information ............................................................................................................................... 14

8.3 Information on the mother pipe .............................................................................................................. 15

9 Manufacturing ................................................................................................................................................ 15

9.1 Mother pipe ..................................................................................................................................................... 15

9.2 Qualification test bend ................................................................................................................................ 15

9.3 Production cold bending ............................................................................................................................ 16

9.4 Post-bending heat treatment .................................................................................................................... 16

9.5 Forming and sizing after bending ........................................................................................................... 17

9.6 Strip/plate end welds .................................................................................................................................. 17

9.7 Jointers and girth welds ............................................................................................................................. 17

9.8 End preparation ............................................................................................................................................ 17

10 Testing and inspection ................................................................................................................................ 17

10.1 General requirements ................................................................................................................................. 17

10.2 Extent of testing and inspection .............................................................................................................. 19

10.2.1 Qualification test bend ................................................................................................................................ 19

10.2.2 Production bends .......................................................................................................................................... 21

10.2.3 Production test bends ................................................................................................................................. 21

10.3 Chemical composition ................................................................................................................................. 21

10.4 Physical testing .............................................................................................................................................. 21

10.4.1 General.............................................................................................................................................................. 21

10.4.2 Tensile testing ................................................................................................................................................ 22

10.4.3 Charpy V-notch impact testing ................................................................................................................. 22

10.4.4 Through-thickness hardness testing ..................................................................................................... 23

10.4.5 Surface hardness testing ............................................................................................................................ 24

10.4.6 Metallographic examination ..................................................................................................................... 24

10.4.7 Guided bend testing ..................................................................................................................................... 25

10.4.8 Flattening tests .............................................................................................................................................. 25

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10.5 Non-destructive testing .............................................................................................................................. 25

10.5.1 Visual inspection ........................................................................................................................................... 25

10.5.2 Weld seam testing ........................................................................................................................................ 26

10.5.3 Inspection of bend ends ............................................................................................................................. 26

10.5.4 Magnetic particle testing or liquid-penetrant testing on the bend body ................................. 26

10.5.5 Ultrasonic testing on the bend body ...................................................................................................... 26

10.5.6 Level of residual magnetism ..................................................................................................................... 27

10.5.7 Repairs .............................................................................................................................................................. 27

10.5.8 NDT personnel ............................................................................................................................................... 27

10.6 Dimensions ..................................................................................................................................................... 27

10.7 Gauging ............................................................................................................................................................. 30

10.8 Hydrostatic testing ....................................................................................................................................... 30

11 Inspection document ................................................................................................................................... 30

12 Marking ............................................................................................................................................................ 30

Annex A (normative) Manufacturing procedure specification ................................................................. 32

A.1 General ............................................................................................................................................................. 32

A.2 Manufacturing procedure specification ............................................................................................... 32

Annex B (normative) PSL 2S cold bends ordered for sour service .......................................................... 34

B.1 Introduction ................................................................................................................................................... 34

B.2 Additional information provided by the purchaser......................................................................... 34

B.3 Manufacturing................................................................................................................................................ 34

B.3.1 Manufacturing procedure.......................................................................................................................... 34

B.3.2 Pipe manufacturing ..................................................................................................................................... 34

B.4 Testing and inspection................................................................................................................................ 34

B.4.1 Tensile properties ........................................................................................................................................ 34

B.4.2 HIC/SWC test .................................................................................................................................................. 35

B.4.3 SSC test .............................................................................................................................................................. 35

B.4.4 Requirements ................................................................................................................................................. 36

B.4.5 Hardness test .................................................................................................................................................. 36

B.5 Hard spots ....................................................................................................................................................... 36

B.6 Inspection ........................................................................................................................................................ 37

B.7 Non-destructive inspection ....................................................................................................................... 37

B.7.1 Laminar imperfections at the pipe ends .............................................................................................. 37

B.7.2 Ultrasonic testing on the bend body ...................................................................................................... 37

B.7.3 Ultrasonic inspection of SAW seam welds ........................................................................................... 37

B.7.4 Non-destructive inspection of HFW weld seams ............................................................................... 37

Bibliography ................................................................................................................................................................. 38

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prEN 14870-4:2021 (E)
European foreword

This document (prEN 14870-4:2021) has been prepared by Technical Committee CEN/TC 12

“Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries”,

the secretariat of which is held by NEN and CYS.
This document is currently submitted to the CEN Enquiry.
A list of all parts in the EN 14870 series can be found on the CEN website.

The text of ISO 15590-4:2019 has been adopted by CEN/TC 12 with some modifications to exclude the

aspects that are covered by CEN/TC 234 “Gas infrastructure”. These modifications are indicated by a

vertical line in the left margin of the text [note: currently indicated with ‘track changes’].

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oSIST prEN 14870-4:2021
prEN 14870-4:2021 (E)
Introduction

This document makes reference to line pipe and bends with delivery conditions based on ISO 3183.

This document contains additional requirements for special applications as follows:

— Manufacturing procedure specification (Annex A);
— PSL 2S cold bends ordered for sour service (Annex B).

The requirements of the annexes apply only where they are specified on the purchase order. This

document does not provide guidance on when it is necessary to specify the above supplementary

requirements defined in the annexes. It is the responsibility of the purchaser to specify, based upon the

intended use and design requirements, the supplementary requirements that will apply for a particular

purchase order.

Further or differing requirements can be needed for individual applications. This document is not

intended to inhibit a manufacturer from offering, or the purchaser from accepting, alternative

equipment or engineering solutions for the individual application. This can be particularly applicable

where there is innovative or developing technology. Where an alternative is offered, it is the

responsibility of the manufacturer to identify and provide details of any variations from this document.

ISO 15590-4:2019, developed within ISO/TC 67/SC 2, has been adopted as EN 14870-4:202X (ISO

15590-4:2019, modified).

The scope of ISO/TC 67/SC 2 is pipeline transportation systems for the petroleum and natural gas

industries without exclusions. However, in CEN the scopes of CEN/TC 12 and CEN/TC 234 overlapped

until 1995. This scope overlap caused problems for the parallel procedure for the above-mentioned

item. The conflict in scope was resolved when both the CEN Technical Committees concerns and the

CEN Technical Board decided to amend the scope of CEN/TC 12 by explicitly excluding “on-land supply

systems used by the gas supply industry excluding gas infrastructure from the input of gas into the on-

shore transmission network up to the inlet connection of gas appliances”.
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oSIST prEN 14870-4:2021
prEN 14870-4:2021 (E)
1 Scope

This document specifies the technical delivery conditions for bends made by the cold bending process

for bend with radii 5xOD or higher for use in pipeline transportation systems for the petroleum and

natural gas industries as defined in ISO 13623.

NOTE 1 ISO 13623 is modified adopted as EN 14161 to exclude on-land supply systems used by the European

gas supply industry from the input of gas into the on-land transmission network up to the inlet connection of gas

appliances.

This document also specifies the requirements for the manufacture of two product specification levels

(PSLs) of cold bends corresponding to product specification levels given for pipe in ISO 3183. This

document is applicable to cold bends made from seamless and welded pipe of unalloyed or low-alloy

steels.

NOTE 2 These are typically C-Mn steels or low-alloy steels that are appropriate for the corresponding level and

grade of line pipe in accordance with ISO 3183.

This document is not applicable to the selection of the cold bend product specification level. It is the

responsibility of the purchaser to specify the PSL, based upon the intended use and design

requirements.
NOTE 3 See also ISO 3183:2012, Introduction.

This document is not applicable to field cold bends and pipeline bends made by other manufacturing

processes.

On-land supply systems used by the European gas supply industry from the input of gas into the on-

land transmission network up to the inlet connection of gas appliances are excluded from the scope of

this document.
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.

ISO 80000-1:2009, Quantities and units — Part 1: General

ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method

ISO 3183:2012, Petroleum and natural gas industries — Steel pipe for pipeline transportation systems

ISO 6507 (all parts), Metallic materials — Vickers hardness test
ISO 6508 (all parts), Metallic materials — Rockwell hardness test

ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature

ISO 6892-2, Metallic materials — Tensile testing — Part 2: Method of test at elevated temperature

ISO 7438, Metallic materials — Bend test

This document is superseded by ISO 3183:2019 after publication of ISO 15590-1:2018. As ISO 3183:2019 is

published as ISO supplement to API Spec 5L, this document maintains the references to particular sections in ISO

3183:2012, which are considered still accurate.
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prEN 14870-4:2021 (E)

ISO 7539-2, Corrosion of metals and alloys — Stress corrosion testing — Part 2: Preparation and use of

bent-beam specimens

ISO 8501-1, Preparation of steel substrates before application of paints and related products — Visual

assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel

substrates and of steel substrates after overall removal of previous coatings

ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel

ISO 10474, Steel and steel products — Inspection documents

ISO 10893-4, Non-destructive testing of steel tubes — Part 4: Liquid penetrant inspection of seamless and

welded steel tubes for the detection of surface imperfections

ISO 10893-5, Non-destructive testing of steel tubes — Part 5: Magnetic particle inspection of seamless and

welded ferromagnetic steel tubes for the detection of surface imperfections

ISO 10893-8, Non-destructive testing of steel tubes — Part 8: Automated ultrasonic testing of seamless

and welded steel tubes for the detection of laminar imperfections

ISO 10893-9, Non-destructive testing of steel tubes — Part 9: Automated ultrasonic testing for the

detection of laminar imperfections in strip/plate used for the manufacture of welded steel tubes

ISO 10893-10:2011, Non-destructive testing of steel tubes — Part 10: Automated full peripheral

ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of

longitudinal and/or transverse imperfections

ISO 10893-11:2011, Non-destructive testing of steel tubes — Part 11: Automated ultrasonic testing of the

weld seam of welded steel tubes for the detection of longitudinal and/or transverse imperfections

ISO 13623, Petroleum and natural gas industries — Pipeline transportation systems

ASNT SNT-TC-1A, Recommended Practice No. SNT-TC-1A: Personnel Qualification and Certification in

Nondestructive Testing

ASTM A370, Standard Test Methods and Definitions for Mechanical Testing of Steel Products

ASTM A435, Standard Specification for Straight-Beam Ultrasonic Examination of Steel Plates

ASTM A578/A578M, Standard Specification for Straight-Beam Ultrasonic Examination of Rolled Steel

Plates for Special Applications
ASTM E18, Standard Test Methods for Rockwell Hardness of Metallic Materials
ASTM E92, Standard Test Method for Vickers Hardness of Metallic Materials
ASTM E112, Standard Test Methods for Determining Average Grain Size
ASTM E165, Standard Test Method for Liquid Penetrant Examination

This document is modified adopted as EN 14161 to exclude on-land supply systems used by the European gas

supply industry from the input of gas into the on-land transmission network up to the inlet connection of gas

appliances.
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oSIST prEN 14870-4:2021
prEN 14870-4:2021 (E)
ASTM E213, Standard Practice for Ultrasonic Testing of Metal Pipe and Tubing

ASTM E214, Standard Practice for Ultrasonic Pulse-Echo Straight-Beam Contact Testing

ASTM E340, Standard Test Method for Macroetching Metals and Alloys
ASTM E709, Standard Guide for Magnetic Particle Testing

ASTM E797, Standard Practice for Measuring Thickness by Manual Ultrasonic Pulse-Echo Contact Method

ASTM G39, Standard Practice for Preparation and Use of Bent-Beam Stress-Corrosion Test Specimens

NACE TM0177:2016, Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking in Hydrogen

Sulfide (H S) Environments

NACE TM0284:2016, Standard Test Method — Evaluation of Pipeline and Pressure Vessel Steels for

Resistance to Hydrogen-Induced Cracking
3 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:

— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
arc
curved portion of a bend
3.2
agreed

agreed upon by the manufacturer (3.17) and purchaser (3.21), and specified in the purchase order

3.3
bend angle
amount of directional change through the cold bend
3.4
bend qualification test

qualification test that produces a cold bend in accordance with the MPS (3.18) and demonstrates that

bends that meet the specified requirements of this document can be produced
3.5
bend radius
distance from the centre of curvature to the centreline axis of the bent pipe
3.6
chord

line segment connecting start and stop points of the bend zone measured at the centreline axis

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prEN 14870-4:2021 (E)
3.7
defect

imperfection (3.11) of a size and/or population density greater than specific acceptance criteria

Note 1 to entry: The specific acceptance criteria are specified in ISO 3183.
3.8
extrados
outer curved section of the arc (3.1)
3.9
heat
batch of steel prepared in one steel-making operation
3.10
if agreed

required to be as prescribed, or more stringent than is prescribed, if agreed upon by the manufacturer

(3.17) and the purchaser (3.21) and specified in the purchase order
3.11
imperfection

discontinuity or irregularity in the product wall or on the product surface that is detectable through

inspection methods
3.12
indication
evidence obtained by non-destructive inspection (3.20)
3.13
cold bending
controlled bending process using presses at room temperature
3.14
inspection

activities, such as measuring, examining, testing, weighing or gauging one or more characteristics of a

product and comparing the results of such activities with the specified requirements in order to

determine conformity
3.15
intrados
inner curved section of the arc (3.1)
3.16
lamination

internal metal separation that creates layers, generally parallel to the pipe/bend surface

3.17
manufacturer
firm, company, or corporation responsible for making and marking the product
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prEN 14870-4:2021 (E)
3.18
manufacturing procedure specification
MPS

document that specifies the properties and description of the mother pipe (3.19), the cold bending

procedure, the post-bending heat treatment equipment and cycle, if applicable, the qualification bend

testing results, the non-destructive testing procedures and the weld end bevel details used for the

manufacture of the cold bends
3.19
mother pipe
straight section of pipe from which a cold bend is made
3.20
non-destructive inspection

inspection (3.14) to reveal imperfections (3.11), using radiographic, ultrasonic or other methods that do

not involve disturbance, stressing or breaking of the materials
3.21
purchaser

party responsible for both the definition of requirements for a product order and for payment of that

order
3.22
submerged-arc welding
SAW

welding process that produces melting and coalescence of metals by heating them with an arc(s)

...