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    I.S. EN 15001-1:2009

    View superseded by
    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    GAS INFRASTRUCTURE - GAS INSTALLATION PIPEWORK WITH AN OPERATING PRESSURE GREATER THAN 0,5 BAR FOR INDUSTRIAL INSTALLATIONS AND GREATER THAN 5 BAR FOR INDUSTRIAL AND NON-INDUSTRIAL INSTALLATIONS - PART 1: DETAILED FUNCTIONAL REQUIREMENTS FOR DESIGN, MATERIALS, CONSTRUCTION, INSPECTION AND TESTING

    Available format(s):  Hardcopy, PDF

    Superseded date:  02-03-2023

    Language(s):  English

    Published date:  01-01-2009

    Publisher:  National Standards Authority of Ireland

    For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
    Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

    Dates of withdrawal of national standards are available from NSAI.

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    Table of Contents - (Show below) - (Hide below)

    Foreword
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 General
    5 Materials
    6 Design of pipework
    7 Design of pressure control systems
    8 Construction
    9 Documentation, inspection and testing
    Annex A (informative) Example schematic diagrams of
            installation options for gas pressure regulating
            systems
    Annex B (informative) Examples of methods for testing
    Annex C (informative) Flammable gases mixing systems
    Annex D (informative) Examples of supports
    Annex E (normative) Materials
    Annex ZA (informative) Relationship between this European
             Standard and the Essential Requirements of EU
             Directive 97/23/EC
    Bibliography

    Abstract - (Show below) - (Hide below)

    Defines detailed functional requirements for the design, selection of materials, construction, inspection and testing of: - industrial gas installation pipework and assemblies with an operating pressure greater than 0,5 bar, and - non-industrial gas installation pipework (residential and commercial) with an operating pressure greater than 5 bar in buildings.

    General Product Information - (Show below) - (Hide below)

    Document Type Standard
    Publisher National Standards Authority of Ireland
    Status Superseded
    Superseded By

    Standards Referenced By This Book - (Show below) - (Hide below)

    I.S. 820:2010 NON-DOMESTIC GAS INSTALLATIONS
    I.S. 3216:2010 CODE OF PRACTICE - BULK STORAGE OF LIQUEFIED PETROLEUM GAS (LPG) - (EDITION 2)

    Standards Referencing This Book - (Show below) - (Hide below)

    EN 12732:2013+A1:2014 Gas infrastructure - Welding steel pipework - Functional requirements
    EN 10208-2:2009 Steel pipes for pipelines for combustible fluids - Technical delivery conditions - Part 2: Pipes of requirement class B
    EN 13480-6:2017 Metallic industrial piping - Part 6: Additional requirements for buried piping
    EN 10240:1997 Internal and/or external protective coatings for steel tubes - Specification for hot dip galvanized coatings applied in automatic plants
    EN 10002-1 : 2001 METALLIC MATERIALS - TENSILE TESTING - PART 1: METHOD OF TEST AT AMBIENT TEMPERATURE
    EN 12327:2012 Gas infrastructure - Pressure testing, commissioning and decommissioning procedures - Functional requirements
    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
    IEC 60079-10:2002 Electrical apparatus for explosive gas atmospheres - Part 10: Classification of hazardous areas
    PD 970:2001 WROUGHT STEELS FOR MECHANICAL AND ALLIED ENGINEERING PURPOSES - REQUIREMENTS FOR CARBON, CARBON MANGANESE AND ALLOY HOT WORKED OR COLD FINISHED STEELS
    EN 1514-1:1997 Flanges and their joints - Dimensions of gaskets for PN-designated flanges - Part 1: Non-metallic flat gaskets with or without inserts
    EN 13480-2:2017 Metallic industrial piping - Part 2: Materials
    EN 1555-1:2010 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 1: General
    EN ISO 5817:2014 Welding - Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) - Quality levels for imperfections (ISO 5817:2014)
    EN 13100-1:2017 Non destructive testing of welded joints of thermoplastics semi-finished products - Part 1: Visual examination
    EN 751-3:1996/AC:1997 Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 3: Unsintered PTFE tapes
    EN 1555-3:2010+A1:2012 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 3: Fittings
    EN 1515-1:1999 Flanges and their joints - Bolting - Part 1: Selection of bolting
    ISO 15348:2002 Pipework Metal bellows expansion joints General
    EN 10290:2002 Steel tubes and fittings for onshore and offshore pipelines - External liquid applied polyurethane and polyurethane-modified coatings
    EN 12007-3:2015 Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part 3: Specific functional requirements for steel
    EN 12560-1:2001 Flanges and their joints - Gaskets for Class-designated flanges - Part 1: Non-metallic flat gaskets with or without inserts
    ISO 3506-1:2009 Mechanical properties of corrosion-resistant stainless steel fasteners Part 1: Bolts, screws and studs
    EN 1775:2007 Gas supply - Gas pipework for buildings - Maximum operating pressure less than or equal to 5 bar - Functional recommendations
    DIN 267-4:1983-08 FASTENERS - TECHNICAL DELIVERY CONDITIONS - PROPERTY CLASSES FOR NUTS (PREVIOUS CLASSES)
    NFE 25 005 : 2005 FASTENERS - TEST METHODS
    EN 10216-5:2013 Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 5: Stainless steel tubes
    EN 13445-6 : 2014 COR 2017 UNFIRED PRESSURE VESSELS - PART 6: REQUIREMENTS FOR THE DESIGN AND FABRICATION OF PRESSURE VESSELS AND PRESSURE PARTS CONSTRUCTED FROM SPHEROIDAL GRAPHITE CAST IRON
    NFE 25 400 : 1985
    EN 12560-2:2013 Flanges and their joints - Dimensions of gaskets for Class-designated flanges - Part 2: Spiral wound gaskets for use with steel flanges
    EN 13480-4:2017 Metallic industrial piping - Part 4: Fabrication and installation
    EN 1254-5:1998 Copper and copper alloys - Plumbing fittings - Part 5: Fittings with short ends for capillary brazing to copper tubes
    EN ISO 3506-1:2009 Mechanical properties of corrosion-resistant stainless steel fasteners - Part 1: Bolts, screws and studs (ISO 3506-1:2009)
    EN 1057:2006+A1:2010 Copper and copper alloys - Seamless, round copper tubes for water and gas in sanitary and heating applications
    EN ISO 15612:2004 Specification and qualification of welding procedures for metallic materials - Qualification by adoption of a standard welding procedure (ISO 15612:2004)
    ISO 15610:2003 Specification and qualification of welding procedures for metallic materials — Qualification based on tested welding consumables
    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
    NFA 49 145 : 1978 STEEL TUBES - HOT FINISHED WELDED TUBES SUITABLE FOR THREADING - DIMENSIONS - TECHNICAL DELIVERY CONDITIONS
    ASTM F 593 : 2017 : REDLINE Standard Specification for Stainless Steel Bolts, Hex Cap Screws, and Studs
    EN 1254-1:1998 Copper and copper alloys - Plumbing fittings - Part 1: Fittings with ends for capillary soldering or capillary brazing to copper tubes
    EN 1254-2:1998 Copper and copper alloys - Plumbing fittings - Part 2: Fittings with compression ends for use with copper tubes
    VDI 3733:1996-07 Noise at pipes
    BS 6104-1(1981) : 1981 MECHANICAL PROPERTIES OF FASTENERS - SPECIFICATION FOR BOLTS SCREWS AND STUDS
    EN 1714:1997/A2:2003 NON-DESTRUCTIVE TESTING OF WELDS - ULTRASONIC TESTING OF WELDED JOINTS
    EN 10289:2002 Steel tubes and fittings for onshore and offshore pipelines - External liquid applied epoxy and epoxy-modified coatings
    SAE J 429 : 2014 MECHANICAL AND MATERIAL REQUIREMENTS FOR EXTERNALLY THREADED FASTENERS
    EN 10088-3:2014 Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes
    EN 1594:2013 Gas infrastructure - Pipelines for maximum operating pressure over 16 bar - Functional requirements
    BS 6104-2(1983) : 1983 MECHANICAL PROPERTIES OF FASTENERS - SPECIFICATION FOR NUTS WITH SPECIFIED PROOF LOAD VALUES
    NFT 54 065 : 1987 PLASTIQUES - TUBES EN POLYETHYLENE POUR RESEAUX DE DISTRIBUTION DE COMBUSTIBLES GAZEUX - SPECIFICATIONS ET METHODES D'ESSAIS
    ASME B16.11 : 2016 FORGED FITTINGS, SOCKET-WELDING AND THREADED
    NEN 2078 : 2001 REQUIREMENTS FOR INDUSTRIAL GAS INSTALLATIONS
    EN 10087:1998 Free-cutting steels - Technical delivery conditions for semi-finished products, hot-rolled bars and rods
    DIN 3547-1:1990-06 PN 4 TO PN 16 GAS AND WATER STOPVALVES; REQUIREMENTS AND ACCEPTANCE TESTING
    EN 1092-3:2003/AC:2007 FLANGES AND THEIR JOINTS - CIRCULAR FLANGES FOR PIPES, VALVES, FITTINGS AND ACCESSORIES, PN DESIGNATED - PART 3: COPPER ALLOY FLANGES
    EN 751-2:1996 Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 2: Non-hardening jointing compounds
    DIN 8075:2011-12 POLYETHYLENE (PE) PIPES - PE 80, PE 100 - GENERAL QUALITY REQUIREMENTS, TESTING
    EN 12954 : 2001 CATHODIC PROTECTION OF BURIED OR IMMERSED METALLIC STRUCTURES - GENERAL PRINCIPLES AND APPLICATION FOR PIPELINES
    EN 13480-1:2017 Metallic industrial piping - Part 1: General
    NFE 25 100 : 1985
    NF EN 1594 : 2014 GAS INFRASTRUCTURE - PIPELINES FOR MAXIMUM OPERATING PRESSURE OVER 16 BAR - FUNCTIONAL REQUIREMENTS
    EN 764-5:2014 Pressure equipment - Part 5: Inspection documentation of metallic materials and compliance with the material specification
    EN 20898-2 : 1993 MECHANICAL PROPERTIES OF FASTENERS - PART 2: NUTS WITH SPECIFIED PROOF LOAD VALUES - COARSE THREAD (ISO 898-2:1992)
    MSS SP 97 : 2012 INTEGRALLY REINFORCED FORGED BRANCH OUTLET FITTINGS - SOCKET WELDING, THREADED, AND BUTTWELDING ENDS
    IEC 60364-1:2005 Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions
    DVGW VP 308 : 2004 GAS-ABSPERRARMATUREN FUER MANOMETER (EINSCHLIESSLICH UEBERDRUCKSCHUTZVORRICHTUNGEN) UND STEUERLEITUNGEN
    EN 12449:2016 Copper and copper alloys - Seamless, round tubes for general purposes
    EN 1044 : 1999 BRAZING - FILLER METALS
    EN 10045-1 : 1990 METALLIC MATERIALS - CHARPY IMPACT TEST - PART 1: TEST METHOD
    ISO 15612:2004 Specification and qualification of welding procedures for metallic materials Qualification by adoption of a standard welding procedure
    DIN 17458:1985-07 SEAMLESS CIRCULAR AUSTENITIC STAINLESS STEEL TUBES SUBJECT TO SPECIAL REQUIREMENTS - TECHNICAL DELIVERY CONDITIONS
    ISO 5817:2014 Welding — Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) — Quality levels for imperfections
    EN ISO 228-1:2003 Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation (ISO 228-1:2000)
    EN 12266-1:2012 Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements
    EN 1515-2:2001 Flanges and their joints - Bolting - Part 2: Classification of bolt materials for steel flanges, PN designated
    NEN 3650 : 1992 C1 1996 REQUIREMENTS FOR STEEL PIPELINE TRANSPORTATION SYSTEMS
    EN 10217-7:2014 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7: Stainless steel tubes
    ISO 15614-1:2017 Specification and qualification of welding procedures for metallic materials — Welding procedure test — Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys
    EN ISO 10806:2003 Pipework - Fittings for corrugated metal hoses (ISO 10806:2003)
    EN 13480-3:2017 Metallic industrial piping - Part 3: Design and calculation
    BS 1387:1985 Specification for screwed and socketed steel tubes and tubulars and for plain end steel tubes suitable for welding or for screwing to BS 21 pipe threads
    EN 1514-2:2014 Flanges and their joints - Gaskets for PN-designated flanges - Part 2: Spiral wound gaskets for use with steel flanges
    EN ISO 10380:2012 Pipework - Corrugated metal hoses and hose assemblies (ISO 10380:2012)
    DVGW VP 302 : 2006 GAS-ABSPERRARMATUREN AUS POLYETHYLEN (PE 80 UND PE 100); ANFORDERUNGEN UND PRUEFUNGEN
    EN 61779-5:2000 Electrical apparatus for the detection and measurement of flammable gases - Part 5: Performance requirements for group II apparatus indicating a volume fraction up to 100 % gas
    CEN/TR 13480-7:2017 Metallic industrial piping - Part 7: Guidance on the use of conformity assessment procedures
    EN 12279:2000/A1:2005 GAS SUPPLY SYSTEMS - GAS PRESSURE REGULATING INSTALLATIONS ON SERVICE LINES - FUNCTIONAL REQUIREMENTS
    ISO 10380:2012 Pipework — Corrugated metal hoses and hose assemblies
    ISO 15609-1:2004 Specification and qualification of welding procedures for metallic materials Welding procedure specification Part 1: Arc welding
    ISO 12944-1:2017 Paints and varnishes — Corrosion protection of steel structures by protective paint systems — Part 1: General introduction
    BS 2789:1985 Specification for spheroidal graphite or nodular graphite cast iron
    EN 437:2003+A1:2009 Test gases - Test pressures - Appliance categories
    ISO 9329-2:1997 Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 2: Unalloyed and alloyed steels with specified elevated temperature properties
    ISO/IEC 17020:2012 Conformity assessment — Requirements for the operation of various types of bodies performing inspection
    NFT 54 066 : 1987 PLASTIQUES - RACCORDS EN POLYETHYLENE A EMBOITURES ELECTROSOUDABLES POUR RESEAUX DE DISTRIBUTION DE COMBUSTIBLES GAZEUX - SPECIFICATIONS ET METHODES D'ESSAIS
    IEC 60529:1989+AMD1:1999+AMD2:2013 CSV Degrees of protection provided by enclosures (IP Code)
    DIN 1630:1984-10 HIGH PERFORMANCE SEAMLESS CIRCULAR UNALLOYED STEEL TUBES - TECHNICAL DELIVERY CONDITIONS
    DVGW VP 607 : 1994
    NFA 32 201 : 1987 FOUNDRY PRODUCTS - CASTING PRODUCTS - UNALLOYED SPHEROIDAL GRAPHITE IRON CASTINGS
    EN 583-1:1998/A1:2003 NON-DESTRUCTIVE TESTING - ULTRASONIC EXAMINATION - GENERAL PRINCIPLES
    EN 1555-4:2011 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 4: Valves
    EN 334:2005+A1:2009 Gas pressure regulators for inlet pressures up to 100 bar
    EN 10204:2004 Metallic products - Types of inspection documents
    EN 60079-10:2003 Electrical apparatus for explosive gas atmospheres - Part 10: Classification of hazardous areas
    NFE 29 591 : 1980 TUYAUTERIES EN CUIVRE - RACCORDS EN CUIVRE ET ALLIAGE DE CUIVRE, A BRASER PAR CAPILLARITE, UTILISES SOUS PRESSION
    IEC 60079-14:2013 Explosive atmospheres - Part 14: Electrical installations design, selection and erection
    EN 13786:2004+A1:2008 Automatic change-over valves having a maximum outlet pressure of up to and including 4 bar with a capacity of up to and including 100 kg/h, and their associated safety devices for butane, propane or their mixtures
    EN 12068:1998 Cold-rolled flat products made of high yield strength micro-alloyed steels for cold forming - General delivery conditions
    EN 751-1:1996 Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 1: Anaerobic jointing compounds
    EN 1563:2011 Founding - Spheroidal graphite cast irons
    NFT 54 067 : 1987 PLASTIQUES - ROBINETS POUR RESEAUX EN POLYETHYLENE DE DISTRIBUTION DE COMBUSTIBLES GAZEUX - SPECIFICATIONS ET METHODES D'ESSAIS
    DIN 8074:2011-12 Polyethylene (PE) - Pipes PE 80, PE 100 - Dimensions; Text in German and English
    EN ISO 15609-1:2004 Specification and qualification of welding procedures for metallic materials - Welding procedure specification - Part 1: Arc welding (ISO 15609-1:2004)
    EN 61779-1 : 2000 AMD 11 2004 ELECTRICAL APPARATUS FOR THE DETECTION AND MEASUREMENT OF FLAMMABLE GASES - PART 1: GENERAL REQUIREMENTS AND TEST METHODS
    EN 1555-5:2010 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 5: Fitness for purpose of the system
    EN 12007-2:2012 Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part 2: Specific functional requirements for polyethylene (MOP up to and including 10 bar)
    EN 1555-2:2010 Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 2: Pipes
    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)
    DVGW GW 2 : 2012 ASSEMBLAGE DE TUBES CUIVRE POUR INSTALLATIONS DE GAZ ET D'EAU A L'INTERIEUR DE TERRAINS ET DE BATIMENTS
    EN 10083-1:2006 Steels for quenching and tempering - Part 1: General technical delivery conditions
    EN 60079-14:2014/AC:2016 EXPLOSIVE ATMOSPHERES - PART 14: ELECTRICAL INSTALLATIONS DESIGN, SELECTION AND ERECTION (IEC 60079-14:2013/COR1:2016)
    EN 13785:2005+A1:2008 Regulators with a capacity of up to and including 100 kg/h, having a maximum nominal outlet pressure of up to and including 4 bar, other than those covered by EN 12864 and their associated safety devices for butane, propane or their mixtures
    EN 13134:2000 Brazing - Procedure approval
    EN 14382:2005+A1:2009/AC:2009 SAFETY DEVICES FOR GAS PRESSURE REGULATING STATIONS AND INSTALLATIONS - GAS SAFETY SHUT-OFF DEVICES FOR INLET PRESSURES UP TO 100 BAR
    EN 13774:2013 Valves for gas distribution systems with maximum operating pressure less than or equal to 16 bar - Performance requirements
    ISO 9000:2015 Quality management systems Fundamentals and vocabulary
    IEC 61779-5:1998 Electrical apparatus for the detection and measurement of flammable gases - Part 5: Performance requirements for group II apparatus indicating a volume fraction up to 100 % gas
    ISO 10806:2003 Pipework Fittings for corrugated metal hoses
    EN 10084:2008 Case hardening steels - Technical delivery conditions
    DIN 3537-1:2011-09 GAS STOP VALVES FOR DOMESTIC GAS INSTALLATIONS UP TO 5 BAR - REQUIREMENTS AND TESTS
    EN 10216-1:2013 Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 1: Non-alloy steel tubes with specified room temperature properties
    DVGW G 477 : 1983 MANUFACTURE, QUALITY ASSURANCE AND TESTING OF RIGID PVC AND HDPE FOR GAS PIPELINES AND SPECIFICATIONS FOR PIPE JOINTS AND PIPE COMPONENTS
    NFA 35 574 : 1990 IRON AND STEEL PRODUCTS - GENERAL PURPOSE STAINLESS STEELS - GRADES 2: SEMI-FINISHED PRODUCTS AND BARS
    EN 60529:1991/AC:2016-12 DEGREES OF PROTECTION PROVIDED BY ENCLOSURES (IP CODE) (IEC 60529 EDITION 2.2 CORRIGENDUM 2:2015)
    EN 837-1:1996/AC:1998 PRESSURE GAUGES - BOURDON TUBE PRESSURE GAUGES - DIMENSIONS, METROLOGY, REQUIREMENTS AND TESTING
    EN 14291:2004 Foam producing solutions for leak detection on gas installations
    EN ISO 15610:2003 Specification and qualification of welding procedures for metallic materials - Qualification based on tested welding consumables (ISO 15610:2003)
    ISO 15607:2003 Specification and qualification of welding procedures for metallic materials General rules
    EN 331:2015 Manually operated ball valves and closed bottom taper plug valves for gas installations for buildings
    EN 571-1:1997 Non destructive testing - Penetrant testing - Part 1: General principles
    EN 10208-1:2009 Steel pipes for pipelines for combustible fluids - Technical delivery condi-tions - Part 1: Pipes of requirement class A
    EN 13480-5:2017 Metallic industrial piping - Part 5: Inspection and testing
    EN 10220:2002 Seamless and welded steel tubes - Dimensions and masses per unit length
    ISO 3506-2:2009 Mechanical properties of corrosion-resistant stainless steel fasteners Part 2: Nuts
    DVGW VP 608 : 1995 PIPES OF POLYETHYLEN (PE 80 AND PE 100) FOR GAS- AND WATER PIPELINES - REQUIREMENTS AND TESTING
    EN 970:1997 Non-destructive examination of fusion welds - Visual examination
    EN 10226-1:2004 Pipe threads where pressure tight joints are made on the threads - Part 1: Taper external threads and parallel internal threads - Dimensions, tolerances and designation
    EN 1290:1998/A2:2003 NON-DESTRUCTIVE EXAMINATION OF WELDS - MAGNETIC PARTICLE EXAMINATION OF WELDS
    IEC 61779-1:1998 Electrical apparatus for the detection and measurement of flammable gases - Part 1: General requirements and test methods
    EN 12799:2000/A1:2003 BRAZING - NON-DESTRUCTIVE EXAMINATION OF BRAZED JOINTS
    NFA 35 561 : 1992 IRON AND STEEL PRODUCTS - GENERAL PURPOSE FREE CUTTING STEEL BARS, WIRE-RODS AND WIRES
    DIN 17440:2001-03 STAINLESS STEELS - TECHNICAL DELIVERY CONDITIONS FOR DRAWN WIRE
    EN 14141:2013 Valves for natural gas transportation in pipelines - Performance requirements and tests
    ISO 228-1:2000 Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation
    EN 25817 : 1992 ARC WELDED JOINTS IN STEEL - GUIDANCE ON QUALITY LEVELS FOR IMPERFECTIONS
    EN ISO 9000:2015 Quality management systems - Fundamentals and vocabulary (ISO 9000:2015)
    EN 10253-2:2007 Butt-welding pipe fittings - Part 2: Non alloy and ferritic alloy steels with specific inspection requirements
    EN 10217-1:2002/A1:2005 WELDED STEEL TUBES FOR PRESSURE PURPOSES - TECHNICAL DELIVERY CONDITIONS - NON-ALLOY STEEL TUBES WITH SPECIFIED ROOM TEMPERATURE PROPERTIES
    EN 1435:1997/A2:2003 NON-DESTRUCTIVE TESTING OF WELDS - RADIOGRAPHIC TESTING OF WELDED JOINTS
    EN ISO 15607:2003 Specification and qualification of welding procedures for metallic materials - General rules (ISO 15607:2003)
    EN ISO/IEC 17020:2012 Conformity assessment - Requirements for the operation of various types of bodies performing inspection (ISO/IEC 17020:2012)
    EN 10255:2004+A1:2007 Non-Alloy steel tubes suitable for welding and threading - Technical delivery conditions
    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
    EN 10088-1:2014 Stainless steels - Part 1: List of stainless steels
    SAE J 995 : 2012 MECHANICAL AND MATERIAL REQUIREMENTS FOR STEEL NUTS
    DIN 2391-2:1994-09 SEAMLESS PRECISION STEEL TUBES - PART 2: TECHNICAL DELIVERY CONDITIONS
    EN ISO 3506-2:2009 Mechanical properties of corrosion-resistant stainless steel fasteners - Part 2: Nuts (ISO 3506-2:2009)
    EN 287-1:2011 Qualification test of welders - Fusion welding - Part 1: Steels
    EN 12186:2014 Gas infrastructure - Gas pressure regulating stations for transmission and distribution - Functional requirements
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