Dutch Standard

NEN 3650-2+A1 (en)

Requirements for pipeline systems - Part 2: Steel - Quire 1 - 6

Eisen voor buisleidingsystemen - Deel 2: Staal - Katern 1 tot en met 6

The NEN 3650:2003 Standards series cancels and replaces NEN 3650:1992; NEN 3650:1992/C1:1996; NEN 3650-1:2001 Ontw.; NEN 3650-2:2001 Ontw.;

NTA 8000:2000 and NEN 3652:1998, partially

ICS 23.040.10

august 2006

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NEN 3650-2+A1:2006

Normcommissie 310 004 "Transportleidingen" Apart from exceptions provided by the law, nothing from this publication may be duplicated and/or published by means of photocopy, microfilm, storage in computer files or otherwise, which also applies to full or partial processing, without the written consent of the Netherlands Standardization Institute. The Netherlands Standardization Institute shall, with the exclusion of any other beneficiary, collect payments owed by third parties for duplication and/or act in and out of law, where this authority is not transferred or falls by right to the Reproduction Rights Foundation.

Although the utmost care has been taken with this publication, errors and omissions cannot be entirely excluded. The Netherlands Standardization Institute and/or the members of the committees therefore accept no liability, not even for direct or indirect damage, occurring due to or in relation with the application of publications issued by the Netherlands Standardization Institute.

Auteursrecht voorbehouden. Behoudens uitzondering door de wet gesteld mag zonder schriftelijke toestemming van het Nederlands Normalisatie-instituut niets uit deze uitgave worden verveelvoudigd en/of openbaar gemaakt door middel van fotokopie, microfilm, opslag in computerbestanden of anderszins, hetgeen ook van toepassing is op gehele of gedeeltelijke bewerking. Het Nederlands Normalisatie-instituut is met uitsluiting van ieder ander gerechtigd de door derden verschuldigde vergoedingen voor verveelvoudiging te innen en/of daartoe in en buiten rechte op te treden, voor zover deze bevoegdheid niet is overgedragen c.q. rechtens toekomt aan de Stichting Reprorecht.

Hoewel bij deze uitgave de uiterste zorg is nagestreefd, kunnen fouten en onvolledigheden niet geheel worden uitgesloten. Het Nederlands Normalisatie-instituut en/of de leden van de commissies aanvaarden derhalve geen enkele aansprakelijkheid, ook niet voor directe of indirecte schade, ontstaan door of verband houdend met toepassing van door het Nederlands Normalisatie-instituut gepubliceerde uitgaven.

©2007 Nederlands Normalisatie-instituut Postbus 5059, 2600 GB Delft Telefoon (015) 2 690 390, Fax (015) 2 690 190

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Content

Foreword ...........................................................................................................................................................5 1 Scope................................................................................................................................................7 2 Normative references ...................................................................................................................10 3 Terms and definitions...................................................................................................................15 3.1 Safety ..............................................................................................................................................15 3.2 Engineering .....................................................................................................................................15 4 Symbols .........................................................................................................................................16 4.1 Pipe geometry .................................................................................................................................16 4.2 Material variables ............................................................................................................................17 4.3 Process variables............................................................................................................................17 4.4 Stress technical variables ...............................................................................................................17 4.5 Stochastic variables ........................................................................................................................17 5 Abbreviations ................................................................................................................................17 6 Safety..............................................................................................................................................18 6.1 General............................................................................................................................................18 6.2 Safety evaluation – external safety .................................................................................................18 6.2.1 Safety and safety zones..................................................................................................................18 6.2.2 Additional risk-limiting measures.....................................................................................................18 6.3 Safety aspects in the development of a pipeline route and the design of the system....................18 7 Structural design – Strength analyses .......................................................................................19 7.1 General............................................................................................................................................19 7.2 Minimal nominal wall thickness relative to handling during transport and storage .........................19 7.3 Wall thickness for Tees and other fittings .......................................................................................20 7.4 Reduced analysis procedure...........................................................................................................20 7.5 Extensive analysis procedure .........................................................................................................21 7.5.1 General............................................................................................................................................21 7.5.2 Ultimate limit states .........................................................................................................................21 7.5.3 Serviceability limit states .................................................................................................................22 7.5.4 Loads and load combinations to be calculated ...............................................................................22 7.5.5 Limit values and assessment ..........................................................................................................22 7.5.6 Summary of ultimate limit states, load combinations and limit values ............................................22 8 Structural design – Other aspects...............................................................................................25 8.1 General............................................................................................................................................25 8.2 Material specifications.....................................................................................................................26 8.2.1 Delivery, inspection and inspection documents ..............................................................................26 8.2.2 (Line)Pipe ........................................................................................................................................26 8.2.3 Induction bends...............................................................................................................................27 8.2.4 Fittings, flanges, bolts and nuts.......................................................................................................27 8.2.5 Supplementary requirements to the specifications for pipe, fittings, flanges, bolts and

nuts..................................................................................................................................................29 8.3 Connections ....................................................................................................................................30 8.3.1 General............................................................................................................................................30 8.3.2 Flange connections .........................................................................................................................31 8.4 Coating ............................................................................................................................................32 8.4.1 General............................................................................................................................................32 8.4.2 Internal and external coatings .........................................................................................................32 8.4.3 Cathodic protection .........................................................................................................................34 8.5 Stations ...........................................................................................................................................34 8.5.1 Supports for aboveground pipelines ...............................................................................................34 8.5.2 Pipelines in stations ........................................................................................................................35 9 Installation .....................................................................................................................................35 9.1 General............................................................................................................................................35 9.2 Transport and storage.....................................................................................................................35

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9.3 Bending of pipes..............................................................................................................................35 9.3.1 General............................................................................................................................................35 9.3.2 Elastic bends ...................................................................................................................................35 9.3.3 Cold-formed bends..........................................................................................................................35 9.3.4 Hot-formed bends............................................................................................................................36 9.3.5 Bends manufactured from half shells..............................................................................................36 9.3.6 Miter bends......................................................................................................................................37 9.4 (Field) weld connections, examination of welds and acceptance criteria .......................................37 9.4.1 General............................................................................................................................................37 9.4.2 Heat treatment.................................................................................................................................37 9.4.3 Welding filler materials ....................................................................................................................37 9.4.4 Non-destructive testing and acceptance criteria .............................................................................37 9.5 Coating of field welds ......................................................................................................................37 9.5.1 Types of coating..............................................................................................................................37 9.5.2 Preparation......................................................................................................................................38 9.5.3 Application, control and repair.........................................................................................................38 9.5.4 Other ...............................................................................................................................................38 9.6 Trenchless techniques for steel pipelines .......................................................................................38 9.7 Cathodically protected pipeline in a casing.....................................................................................39 9.7.1 General............................................................................................................................................39 9.7.2 Casting diameter .............................................................................................................................39 9.7.3 Insertion of the pipeline ...................................................................................................................39 9.8 Pressure testing ..............................................................................................................................41 9.8.1 General............................................................................................................................................41 9.8.2 Strength test ....................................................................................................................................41 9.8.3 Tightness test ..................................................................................................................................42 9.8.4 Pretesting ........................................................................................................................................42 9.8.5 Testing 'tie-in' welds ........................................................................................................................42 9.8.6 Miscellaneous..................................................................................................................................42 9.9 Completion ......................................................................................................................................43 10 Operation and termination of operations ...................................................................................43 10.1 Corrosion management...................................................................................................................43 10.2 Fitness for purpose .........................................................................................................................43 11 Offshore pipelines.........................................................................................................................43 11.1 General............................................................................................................................................43 11.2 Design .............................................................................................................................................44 11.2.1 Structural design .............................................................................................................................44 11.3 Installation .......................................................................................................................................44 11.3.1 Reel lay method ..............................................................................................................................44 Annex A (normative) Reduced analyses procedure ..................................................................................45 A.1 General............................................................................................................................................45 A.2 Criteria for applying the reduced analyses procedure ....................................................................46 A.2.1 Category a) (field section, watercourse) .........................................................................................46 A.2.2 Category b) (road shoulder) ............................................................................................................47 A.2.3 Category c) (crossing in open trenches) .........................................................................................47 A.2.4 Category d) (drilled crossing) ..........................................................................................................47 A.2.5 Category e) (railway).......................................................................................................................48 A.3 Figures for reduced analyses procedure ........................................................................................51 Annex B (normative) Material specifications..............................................................................................54 B.1 Overview specifications and hot yield strengths .............................................................................54 B.1.1 Introduction......................................................................................................................................54 B.1.2 Specifications and hot yield strength...............................................................................................54 B.1.2.1 Pipe (seamless and welded) ...........................................................................................................54 B.1.2.2 Flanges (Forgings) ..........................................................................................................................56 B.1.2.3 Bolts and nuts..................................................................................................................................56 B.1.3 Notch ductility testing ......................................................................................................................58 B.2 Model specification and order specifications ..................................................................................61 B.2.1 Acceptance of a material specification............................................................................................61

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B.2.1.1 Requests .........................................................................................................................................61 B.2.1.2 Material specifications.....................................................................................................................62 B.2.1.3 Results of the material testing.........................................................................................................63 B.2.1.4 Required inspection document (for acceptance of a material specification) ..................................63 B.2.1.5 Supplementary requirements for acceptance of a material specification (pipe) .............................64 B.2.2 Flanges (forgings), non alloy and low alloy steel (model description for specifications) ................65 B.2.2.1 Product manufacture.......................................................................................................................65 B.2.2.2 Heat treatment.................................................................................................................................65 B.2.2.3 Mechanical testing ..........................................................................................................................65 B.2.2.4 Non-destructive testing ...................................................................................................................66 B.2.2.5 Mechanical properties requirements...............................................................................................67 B.2.2.6 Surface testing and tests for internal defects..................................................................................67 B.2.2.7 Marking............................................................................................................................................67 B.2.3 Bolts and nuts (model description for specifications)......................................................................68 B.2.3.1 Manufacture of the product .............................................................................................................68 B.2.3.2 Heat treatment.................................................................................................................................68 B.2.3.3 Scope of mechanical testing ...........................................................................................................68 B.2.3.4 Requirements for mechanical properties ........................................................................................69 B.2.3.5 Surface examination .......................................................................................................................70 B.2.3.6 Marking............................................................................................................................................70 Annex C (normative) Welding and weld examination................................................................................72 C.1 Supplementary and/or deviating requirements in comparison to NEN-EN 12732:2000.................72 C.1.1 General............................................................................................................................................72 C.1.2 Supplementary and/or deviating requirements to NEN-EN 12732:2000 ........................................72 C.2 NDE acceptance criteria .................................................................................................................75 C.2.1 General procedure for NDE acceptance.........................................................................................75 C.2.1.1 Application area...............................................................................................................................75 C.2.1.2 Requirements with regard to guidelines..........................................................................................76 C.2.2 Acceptance criteria TOFD...............................................................................................................76 C.2.2.1 Acceptance criteria of relevant indications......................................................................................76 C.2.2.2 Single diffraction signals .................................................................................................................77 C.3 Postweld heat treatment .................................................................................................................78 C.3.1 Scope ..............................................................................................................................................78 C.3.2 Classification of materials with regard to post-weld heat treatment................................................78 C.3.3 Nature and scope of the post weld heat treatment .........................................................................79 C.3.4 Realization.......................................................................................................................................80 C.3.4.1 Equivalent Standards of post-weld heat treatment .........................................................................80 C.3.4.2 Heat treatment in a furnace.............................................................................................................81 C.3.4.3 Local heat treatment .......................................................................................................................81 C.3.5 Critical thickness .............................................................................................................................84 Annex D (normative) Complete analyses procedure .................................................................................85 D.1 Load combinations ..........................................................................................................................85 D.2 Analyses models .............................................................................................................................88 D.2.1 Schematization................................................................................................................................88 D.2.1.1 Geometry.........................................................................................................................................88 D.2.1.2 Material properties ..........................................................................................................................88 D.2.2 Analyses models under static load..................................................................................................89 D.2.2.1 Elasticity theory for beam calculation – Elasticity theory for cross section calculation (E-E) .........89 D.2.2.2 Elasticity theory for beam calculation – Plasticity theory for cross section calculation (E-P) .........89 D.2.2.3 Plasticity theory for beam calculation – Plasticity theory for cross section calculation (P-P) .........90 D.2.2.4 Integrated calculation for pipeline – Soil interaction........................................................................90 D.2.3 Analyses models for cyclic loads ....................................................................................................91 D.2.3.1 Superposition ..................................................................................................................................91 D.2.3.2 Load history.....................................................................................................................................91 D.3 Limit states and corresponding assessments .................................................................................91 D.3.1 Limit state stress .............................................................................................................................91 D.3.2 Limit state strain ..............................................................................................................................93 D.3.3 Limit state deformations ..................................................................................................................93 D.3.3.1 Ovalization.......................................................................................................................................93

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D.3.3.2 Local buckling..................................................................................................................................94 D.3.3.3 Flexural Buckling.............................................................................................................................95 D.3.3.4 Implosion .........................................................................................................................................97 D.3.3.5 Progressive plastic collapse............................................................................................................98 D.3.4 Limit state with alternating yield ......................................................................................................99 D.3.4.1 Background .....................................................................................................................................99 D.3.4.2 Procedure for assessing straight pipelines and bends .................................................................100 D.3.4.3 Generally applicable procedure ....................................................................................................101 D.3.4.4 Simplified procedure, if principal stresses do not change direction ..............................................101 D.3.4.5 Stress ellipse for straight field sections.........................................................................................101 D.3.5 Limit state fatigue ..........................................................................................................................102 D.3.5.1 Assessment procedure .................................................................................................................102 D.3.5.2 Limit value for fatigue ....................................................................................................................103 D.3.5.3 Fatigue damage from variable stress intervals .............................................................................106 D.3.5.4 Simplified fatigue analyses............................................................................................................106 D.3.5.5 Fatigue through traffic load ...........................................................................................................106 D.3.6 Limit state for resonance and 'vortex shedding' / excessive lateral movements ..........................106 D.3.7 Limit state: displacements (stable position) ..................................................................................106 Annex E (normative) Application of plasticity theory..............................................................................108 E.1 Introduction....................................................................................................................................108 E.2 Load bearing capacity of the pipeline as a beam..........................................................................108 E.3 Demarcation of the elastic area ....................................................................................................109 E.4 Calculation procedure ...................................................................................................................110 E.5 Interaction formulae for straight pipelines .....................................................................................110 E.5.1 General..........................................................................................................................................110 E.5.2 Interaction formulae for a straight pipe .........................................................................................111 E.5.3 Calculation of the ovalization ........................................................................................................114 E.5.4 Calculation of the strains...............................................................................................................116 E.5.4.1 In longitudinal direction .................................................................................................................116 E.5.4.2 In circumferential direction ............................................................................................................116 E.6 Moment-curvature diagram ...........................................................................................................117 E.7 Interaction formulae for bends ......................................................................................................117 Annex F (informative) Public safety ..........................................................................................................118 F.1 Assessing local and group risk......................................................................................................118 F.1.1 Purple book ...................................................................................................................................118 F.1.2 VROM circulars .............................................................................................................................118 F.2 QRA according to CPR 18E...........................................................................................................118 F.2.1 General..........................................................................................................................................118 F.2.2 Leakage or rupture of pipeline or “Loss of Containment Events” .................................................119 F.2.3 Frequencies, probabilities and consequences of incidents with leakage .....................................119 F.2.4 Modelling of discharge, dispersion, exposure and fatal injury ......................................................120 F.2.4.1 Leakage.........................................................................................................................................120 F.2.4.2 Pipeline rupture .............................................................................................................................121 F.2.5 Calculation and reproduction of the results...................................................................................121 F.3 Safety zones for natural gas and category K1, K2 and K3 flammable liquids ..............................122 F.3.1 General..........................................................................................................................................122 F.3.2 Local risk .......................................................................................................................................122 F.3.2.1 Safety zoning.................................................................................................................................122 F.3.2.2 Objects determining the location classification .............................................................................122 F.3.2.3 Assessment distances ..................................................................................................................122 F.3.2.4 Wall thickness ...............................................................................................................................123 F.3.2.5 Building distances .........................................................................................................................124 F.3.3 Group risk......................................................................................................................................125 F.3.3.1 Rules of thump for natural gas transport.......................................................................................125 F.3.3.2 Risk Pattern...................................................................................................................................126 F.4 Measures for limiting the probability of failure...............................................................................126 Bibliography..................................................................................................................................................128

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Foreword

NEN (Netherlands Standardization Organization) is the National Standardization body of the Netherlands and subsequently the Dutch member of CEN and ISO. The National Standards are drafted in accordance with the NEN Directives which are in line with the ISO/IEC Directives, Part 2.

NEN 3650 consists of the following Parts, under the general title Requirements for Pipeline Systems:

Part 1: General

Part 2: Steel

Part 3: Plastics

Part 4: Concrete

Part 5: Cast Iron

The NEN 3650:2003 Standards series cancels and replaces NEN 3650:1992; NEN 3650:1992/C1:1996; Draft NEN 3650-1:2001; Draft NEN 3650-2:2001; NTA 8000:2000 and NEN 3652:1998, in Part. In addition to steel pipe which was the hallmark of the 1992 publication, this edition includes other pipeline materials.

NOTE The text of NEN 3650-2:2003/A1:2006 is incorporated in this translated version.

NEN 3650-2 has the status of a National Standard. This Part includes requirements for steel pipelines which shall satisfy the requirements set forth in NEN 3650-1:2003.

In the past, the requirements for steel pipelines were an integral Part of NEN 3650:1992. With regard to the old standard, the adopted requirements have been adapted to progressing matters of a technical nature, and as a result, reference is likewise being made to relevant European, ISO and other International Standards as much as possible.

With regard to design calculations, newly defined combinations of loads, limit values and boundary conditions shall be taken into consideration. Additionally, a departure from methods with partial factors on the loads and the properties of materials has subsequently occurred. Methods of calculation have been added in which the plastic behaviour of the steel is taken into consideration (Annex E). The reduced calculation of strength from NEN 3650:1992 is utilized for steel (Annex A). The chapter on offshore pipelines has been expanded considerably. Furthermore, information has been adopted into Annex F which is related to external safety policies of the government to the extent that it relates to pipelines.

Annexes A, B, C, and D are normative. Annexes E and F are informative components of this Standard.

Because the Figures in this Standard are in large part adopted from the old standards, and the additions were made outside NEN, the standards and editing rules for technical drawings have not been completely followed which can be seen from the editing and scripts of the Figures. In the text part of the standard, however, the correct manner of writing and printing is utilized.

Review and Revision of the standard

The content of this Standard is examined minimally once every five years. Proposals for revision shall be submitted in writing to NEN.

Purpose of the standard

The purpose of NEN 3650 series is to provide a uniform basis for the design, installation, operation and termination of pipeline transportation systems, to ensure and guarantee that the system is reliable, durable, effective and efficient and is safe for people, the environment and property.

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The requirements stated for this purpose are safety requirements. Deviation from the (deterministic) regulations of this Standard is only possible, if it can be demonstrated that the same or higher level of safety will be otherwise attained.

Interface EN and ISO Standards

Relative to the relevant European Standards for the pipeline-technical domain, this Standard adds additional details for conditions in the Netherlands.

Application of the requirements of this Standard, including references to NEN-EN 1594:2000 and ISO 13623:2000 means that the pipeline system is also in compliance with the requirements of NEN-EN 1594:2000 and ISO 13623:2000.

Use of standard

The people applying the standard shall be familiar with the matter and have the relevant expertise.

The designer, builder or user of the pipeline system is reminded that this Standard is neither a design specification nor a handbook.

Units of Measurement

In this International Standard, data are expressed in SI units. For data expressed in SI units, a comma is used as the decimal separator and a space is used as the thousands separator.

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Requirements for pipeline systems – Part 2: Steel – Quire 1 - 6

1 Scope

This Part of the standard includes requirements for steel pipelines which shall satisfy the requirements set forth in NEN 3650-1:2003.

The classification of the pipelines which fall under the NEN 3650 series is determined by the medium that is being transported. The relationship between the classification (Group I and Group II pipeline systems) and the relationship with the standard series is shown in the flowchart (Figure 1).

a) The function of Group I pipeline systems is to transport hazardous fluids (see A.2.1) both by land and by sea. For Group I, the entire pipelines system as a whole shall satisfy the requirements of the standard;

b) Group II pipeline systems (see A.2.2) are for transporting fluids other than in a). For Group II, the application of the standard is limited to pipelines in or near important public works and pipelines located in groundwater protection areas.

A schematic representation of which pipeline systems fall under the standard is depicted in Figure 2.

NOTE Figures 1 and 2 are also found in NEN 3650-1:2003. Figure 1 has been adopted in all Parts. Figure 2 has been included in this Part once again because it provides insight to the limits of Group I pipelines and the majority of Group I pipelines are made of steel.

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Figure 1 — Flowchart of group classification and standards

Specific material requirements: • steel ⇒ NEN 3650-2 • plastics ⇒ NEN 3650-3 • concrete ⇒ NEN 3650-4 • cast iron ⇒ NEN 3650-5

Crossings with important public works (all fluids and materials): NEN 3651 • supplementary requirements to the

NEN 3650 series.

NOT a NEN 3650 pipeline Other options – Standards for: • drinking water supply; • gas distribution; • heat distribution (district heating); • sewer system (waste water

technology).

NEN 3650 series (requirements for pipelines incl. fittings & appurtenances which are components of the limitation of the system) NEN 3650-1 general: • safety calculations; • design; • installation of new pipeline; • operational management; • change in design conditions.

Location of pipeline • In or near important

public works

Type of medium • Water, not pollutant to groundwater

(drinking water, untreated water, rainwater, warm water)

Location of pipeline • In groundwater protection

areas

YES YES

YES

YES

YES

NO

NO

NO

NO

GROUP I Intrinsically hazardous fluids (in conformity with A.2.1 of NEN 3650-1:2003): • oxidizing; • extremely inflammable; • highly inflammable; • (very) poisonous; • hot water (in conformity with A.2.4).

GROUP II Fluid that is hazardous exclusively through effects after its release (in conformity with A.2.2 of NEN 3650-1:2003): • natural gas (≤1,6 MPa local transport,

distribution); • non-flammable gas; • water, waste water; • hot water, not within Group I. Voorbeeld

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Figure 2 — Scope of this Standard

SHUT OFF STATION

BLENDING STATION

Liquid Gas

PURCHASE OR TREATMENT

GAS PRESSURE REGULATING STATION

PURCHASE

(BIG AMOUNTS)

BOOSTER STATION

MAJOR PUBLIC WORKS, GROUND W ATER PROTECTION AREA

LEGEND

PIPELINES AND STATIONS UNDER THE SCOPE OF THIS STANDARD (GROUP I)

PIPELINES UNDER THE SCOPE OF THIS STANDARD (GROUP II)

PIPELINES NOT UNDER THE SCOPE OF THIS STANDARD

PRODUCTION, YIELD

PROCESSING, STORAGE AND/OR TREATMENT INSTALLATION

COMPRESSOR STATION PUMPING STATION

INSTALLATIONS NOT UNDER THE SCOPE OF THIS STANDARD

>1,6MPa H2O CxHy

≤1,6MPa

MAJOR PUBLIC WORKS, GROUNDWATER PROTECTION AREA

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2 Normative references

The following normative documents include provisions which, since they are referenced, are likewise provisions of this Standard. As this Standard was printed, the cited versions were in force. All normative documents can however be modified; it is therefore recommended that parties which make agreements on the basis of this Standard, try to apply the most recent version of the standards documents cited below.

NEN 2063 Arc welding – Fatique loaded structures – Calculation of welded joints in unalloyed and low-alloy steel up to and including Fe 510 (Fe 52)

NPR 2760:1991 Mutual influence of pipelines and high-voltage circuits

NEN 3650-1:2003 Requirements for pipeline systems – Part 1: General

NEN 3650-3:2004 Requirements for pipeline systems – Part 3: Plastics

NEN 3650-4:2004 Requirements for pipeline systems – Part 4: Concrete

NEN 3650-5:2004 Requirements for pipeline systems – Part 5: Cast iron

NEN 3651:2003 Additional requirements for pipelines in crossings of important public works

Draft NEN 3653:2003 Methods for the determination of NDE acceptance criteria for defects in pipeline girth welds

NPR 6903:1986 Installation of underground pipelines consisting of steel pipes and fittings externally coated with PE

NEN 6904:1976 Concrete weight coating of steel pipes

NPR 6912:1997 Cathodic protection on shore pipelines and metal constructions

NEN 6913:1983 Internal coating with asphaltic bitumen of steel tanks, pipes and accessories to be laid underground

NEN-EN 288-3:1997 Specification and approval of welding procedures for metallic materials – Part 3: Welding procedure tests for the arc welding of steels

NEN-EN 473:2000 Non destructive testing – Qualification and certification of NDT personnel – General principles

NEN-EN 1092-1:2002 Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN designated – Part 1: Steel flanges

NEN-EN 1591-1:2001 Flanges and their joints – Design rules for gasketed circular flange connections – Part 1: Methods of calculation

NVN-ENV 1591-2:2001 Flanges and their joints – Design rules for gasketed circular flange connections – Part 2: Gasket parameters

NEN-EN 1594:2000 Gas supply systems – Pipelines for maximum operating pressure over 16 bar – Functional requirements

NEN-EN 1708-1:1999 Welding – Basic weld joint details in steel – Part 1: Pressurized components

NVN-ENV 1991-3:1995 Eurocode 1: Basis of design and actions on structures – Part 3: Traffic loads on bridges

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NVN-ENV 1993-1-1:1995 Eurocode 3: Design of steel structures – Part 1-1: General rules and rules for buildings

NEN-EN 10021:1994 General technical delivery requirements for steel and iron products

NEN-EN 10028-3:1993 Flat products made of steels for pressure purposes – Part 3: Weldable, fine grain steels, normalized

NEN EN 10025-3:2004 Hot rolled products of structural steels – Part 3: Technical delivery conditions for normalized/normalized rolled weldable fine grain structural steels

Draft NEN-EN 10168:2000 Iron and steel products – Inspection documents – List of information and descriptions

NEN-EN 10204:2004 Metallic products – Types of inspection documents

NEN-EN 10208-1:1997 Steel pipes for pipelines for combustible fluids – Technical delivery conditions – Part 1: Pipes of requirement class A

NEN-EN 10208-2:1996 Steel pipes for pipelines for combustible fluids – Technical delivery conditions – Part 2: Pipes of requirement class B

NEN-EN 10216-2:2002 Seamless steel tubes for pressure purposes – Technical delivery conditions – Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties

NEN-EN 10217-2:2002 Welded steel tubes for pressure purposes – Technical delivery conditions – Part 2: Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties

NEN-EN 10217-5:2002 Welded steel tubes for pressure purposes – Technical delivery conditions – Part 5: Submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature properties

NEN-EN 10222-2:2000 Steel forgings for pressure purposes – Part 2: Ferritic and martensitic steels with specified elevated temperature properties

Draft NEN-EN 10285:1996 Steel tubes and fittings for on and offshore pipelines – External three layer extruded polyethylene based coatings

Draft NEN-EN 10286:1996 Steel tubes and fittings for on and offshore pipelines – External three layer extruded polypropylene based coating

Draft NEN-EN 10287:1996 Steel tubes and fittings for on and offshore pipelines – External fused polyethylene based coatings

NEN-EN 10288:2002 Steel tubes and fittings for onshore and offshore pipelines – External two layer extruded polyethylene based coatings

NEN-EN 10289:2002 Steel tubes and fittings for onshore and offshore pipelines – External liquid applied epoxy and epoxy-modified coatings

NEN-EN 10290:2002 Steel tubes and fittings for onshore and offshore pipelines – External liquid applied polyurethane and polyurethane-modified coatings

2nd Draft NEN-EN 10298:2002 Steel tubes and fittings for on shore and offshore pipelines – Internal lining with cement mortar

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Draft NEN-EN 10301:1998 Steel tubes and fittings for on and offshore pipelines – Internal coating for the reduction of friction for conveyance of non corrosive gas

Draft NEN-EN 10309:1999 Steel tubes and fittings for onshore and offshore pipelines – External layer epoxy powder based coatings

Draft NEN-EN 10310:1999 Steel tubes and fittings for onshore and offshore pipelines – Internal and external polyamide powder based coatings

NEN-EN 12007-3:2000 Gas supply systems – Pipelines for maximum operating pressure up to and including 16 bar – Part 3: Specific functional recommendations for steel

NEN-EN 12068:1998 Cathodic protection – External organic coatings for the corrosion protection of buried or immersed steel pipelines used in conjunction with cathodic protection – Tapes and shrinkable materials

NEN-EN 12327:2000 Gas supply systems – Pressure testing, commissioning and decommissioning procedures – Functional requirements

NEN-EN 12474:2001 Cathodic protection for submarine pipelines

NEN-EN 12560-1:2001 Flanges and their joints – Gaskets for Class-designated flanges – Part 1: Non-metallic flat gaskets with or without inserts

NEN-EN 12560-2:2001 Flanges and their joints – Gaskets for Class-designated flanges – Part 2: Spiral wound gaskets for use with steel flanges

NEN-EN 12560-3:2001 Flanges and their joints – Gaskets for Class-designated flanges – Part 3: Non-metallic PTFE envelope gaskets

NEN-EN 12560-4:2001 Flanges and their joints – Gaskets for Class-designated flanges – Part 4: Corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges

NEN-EN 12732:2000 Gas supply systems – Welding steel pipework – Functional requirements

NEN-EN 12954:2001 Cathodic protection of buried or immersed metallic structures – General principles and application for pipelines

NEN-EN 13480-3:2002 Metallic industrial piping – Part 3: Design and calculation

NPR-CR 13642:1999 Flanges and their joints – Design rules for gasketed circular flange connections – Background information

Draft NEN-EN 13941:2000 Design and installation for preinsulated bonded pipe systems for district heating

NEN-EN 45004:1996 General criteria for the operation of various bodies performing inspection

NEN-EN 45011:1998 General requirements for bodies operating product certification systems

Draft NEN-EN 50162:2000 Protection against corrosion by stray current from DC systems

NEN-EN-ISO 898-1:1999 Mechanical properties of fasteners made of carbon steel and alloy steel – Part 1: Bolts, screws and studs

NEN-EN-ISO 2566-1:1999 Steel – Conversion of elongation values – Part 1: Carbon steel and low alloy steels

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NEN-EN-ISO 2566-2:1999 Steel – Conversion of elongation values – Part 2: Austenitic steels

NEN-EN-ISO 8501-1:2001 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

NEN-EN-ISO 9001:2000 Quality management systems – Requirements

NEN-ISO 898-2:1994 Mechanical properties of fasteners – Part 2: Nuts with specified proof load values – Coarse thread

NEN-ISO 3183-3:2000 Petroleum and natural gas industries – Steel pipe for pipelines – Technical delivery conditions – Part 3: Pipes of requirement class C

NEN-EN-ISO 9692-1:2004 Welding and allied processes – Recommendation for joint preparation – Part 1: Manual metal-arc welding, gas-shielded metal-arc welding, gas welding, TIG welding and beam welding of steels

NEN-ISO 15590-1:2001 Petroleum and natural gas industries – Induction bends, fittings and flanges for pipeline transportation systems – Part 1: Induction bends

ISO 3183-1:1996 Petroleum and natural gas industries – Steel pipe for pipelines – Technical delivery conditions – Part 1: Pipes of requirement class A

ISO 3183-2:1996 Petroleum and natural gas industries – Steel pipe for pipelines – Technical delivery conditions – Part 2: Pipes of requirement class B

ISO 7005-1:1992 Metallic flanges – Part 1: Steel flanges

ISO 13623:2000 Petroleum and natural gas industries – Pipeline transportation systems

ISO 15741 Paints and varnishes – Friction-reduction coatings for the interior of on- and offshore pipelines for non-corrosive gases

lSO/DIS 15589-1:2002 Petroleum and natural gas industries – Cathodic protection for pipeline transportation systems – Part 1: On-land pipelines

ISO/DIS 15590-2:2002 Petroleum and natural gas industries – Introduction bends, fittings and flanges for pipeline transportation systems – Part 2: Fittings

API RP 5L1 Recommended Practice for Railroad Transportation of Line Pipe (Fifth Edition)

API RP 5LW Recommended Practice for Transportation of Line Pipe on Barges and Marine Vessels (Second Edition)

API SPEC 5L Specification for Line Pipe Forty-Second Edition

ANSI/ASME B16.5-96 Pipe Flanges and Flanged Fittings

ANSI/ASME B16.20-98 Metallic Gaskets for Pipe Flanges – Ring Joint, Spiral-Wound, and Jacketed

ANSI/ASME B16.21-92 Nonmetallic Flat Gaskets for Pipe Flanges

ASTM A105/A105M-00 Standard Specification for Carbon Steel Forging for Piping Applications

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