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BS EN 15001-1:2023

BS EN 15001-1:2023

$215.11

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 – Detailed functional requirements for design, materials, construction, inspection and testing

Published By Publication Date Number of Pages
BSI 2023 136
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This European Standard specifies 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; starting from the outlet of the network operator’s point of delivery up to the inlet connection to the gas appliance; normally the inlet isolation valve. This standard also covers the pipework to the inlet connection of a gas appliance that is not included within the scope of the appliance standard. NOTE 1 The use of the term installation and pipework is interchangeable. Apart from the exceptions stated below, this standard applies to gas installations operating at ambient temperatures between −20 °C and 40 °C and operating pressures up to and including 60 bar. For operating conditions outside these limitations, reference should additionally be made to EN 13480 (all parts) for metallic pipework. For industrial gas installations up to and including 0,5 bar and for non-industrial (residential and commercial) gas installations up to and including 5 bar in buildings, EN 1775 applies. For gas installations that do not fall within the scope of EN 1775 or other European Standards, this standard applies. In this European Standard, the term “gas“ refers to combustible gases, which are gaseous at 15 °C and 1 013 mbar absolute atmospheric pressure (normal conditions). These gases are commonly referred to as manufactured gas, natural gas or Liquefied Petroleum Gas (LPG). They are also referred to as first, second or third family gases as classified in EN 437:2003+A1:2009, Table 1. The given values are considered as normal conditions for all volumes given in this standard. This European Standard is applicable to installation pipework for the carriage of: – processed, non-toxic and non-corrosive natural gas according to EN 437:2003+A1:2009 and EN 16726 “Gas infrastructure – Quality of gas – Group H”; – vaporized LPG; – biomethane, complying with EN 16723 1; – vaporized LNG. NOTE 2 The specification of vaporized LNG is equal to that of natural gas as classified in EN 437:2003+A1:2009. This European Standard does not cover pipework for hydrogen rich gases that fall outside the definitions within EN 437:2003+A1:2009. LPG storage vessels (including all ancillaries fitted directly to storage vessels) are excluded. Also excluded are LPG installations and sections of LPG installations operating at vapour pressure in the liquid state (e.g. between the storage vessel and any pressure regulator). In this standard, all pressures are gauge pressures unless otherwise stated. This standard has been harmonized to address the essential safety requirements of the Pressure Equipment Directive (PED, 2014/68/EU [formerly 97/23/EC]) relevant for the joining of gas installation pipework (assemblies) falling within the scope of the PED. These are listed in Annex ZA. However, “this Directive does not cover the assembly of pressure equipment on the site and under the responsibility of the user, as in the case of industrial installations” (PED, Preamble, 7th recital, last paragraph). Although in this respect, the standard takes into account the essential safety requirements of the PED, no inference can be drawn from this as to whether or not the installation or parts of the installation falls within the scope of the PED. Reference should therefore be made to the PED and relevant national legislation. This European Standard specifies common basic principles for gas supply systems. Users of this European Standard should be aware (…)

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PDF Pages PDF Title
2 undefined
13 1 Scope
14 2 Normative references
21 3 Terms and definitions
3.1 Definitions relating to pressure
22 3.2 Definitions relating to the gas installation
23 3.3 Definition relating to means of isolation
3.4 Definitions relating to jointing methods
24 3.5 Definitions relating to components
25 3.6 Definitions relating to tests
26 3.7 Definition relating to testing and inspection
3.8 Definitions relating to assembly processes for metallic materials
3.9 Definitions relating to pressure regulating and metering
27 4 General
4.1 Quality system and competence
4.2 Selection of materials
4.2.1 Specification of materials and components
4.2.2 Compliance with EU Directive 2014/68/EU
4.2.2.1 Tensile test elongation
28 4.2.2.2 Ageing
4.2.3 Certification of materials and components
4.3 Protection against hazards
4.3.1 Resistance to fire
4.3.2 Resistance to corrosive substances and atmosphere
4.3.3 Protection against variations in the operating pressure
4.3.4 Protection against gas hazards
4.3.4.1 General
29 4.3.4.2 Zone classification
4.3.5 Electrical installation
4.3.5.1 Power Supplies
4.3.5.2 Installation in hazardous area
4.4 Accommodation and location of gas pressure control and metering systems, gas pressure compressors and gas mixing systems
4.4.1 Requirements for the enclosure of installations
4.4.2 Installation in an appliance room
30 4.4.3 Protection against adverse influences
5 Materials
5.1 Standards and specifications for pipes and pipe fittings
5.1.1 General
5.1.2 Carbon steel pipes
5.1.2.1 General
5.1.2.2 Product form
5.1.2.3 Welding and forming restrictions
31 5.1.2.4 Pipe dimensions
5.1.2.5 Pressure limits
5.1.2.6 Impact testing
32 5.1.3 Carbon steel and iron fittings
5.1.3.1 General
5.1.3.2 Flange types, dimensions and drilling patterns
5.1.3.3 Threaded fittings
5.1.4 Stainless steel pipes and pipe fittings (including flanges and valves)
34 5.1.5 Copper
5.1.6 Polyethylene
5.1.7 Ancillaries
5.1.8 Valves
35 6 Design of pipework
6.1 General
6.1.1 Installation drawings and technical file
6.1.2 Measuring and test instruments
6.1.3 Properties of gas
36 6.2 Layout
6.2.1 Limits of the pipework location
6.2.2 Above-ground pipework
6.2.3 Buried pipework
6.2.4 Distance between buried pipework and buildings
6.2.5 Unacceptable locations for gas pipework in buildings
37 6.3 Dimensioning
6.3.1 Pressure loss
6.3.2 Gas velocity
6.4 Pressure and wall thickness
6.4.1 PS and test pressure
38 6.4.2 Pipe wall thickness
6.4.2.1 Steel pipe
42 6.4.2.2 Copper pipes
6.4.2.3 PE pipes
43 6.5 Safety engineering
6.5.1 Principles of pipework
44 6.5.2 Isolation of the gas supply
6.5.2.1 Isolation in an emergency
46 6.5.2.2 Isolation to enable work to be performed
47 6.5.2.3 Reverse flow
6.5.3 Location of pipework
6.5.4 Supporting structures
6.5.5 Depressurising and purging
6.6 Detail engineering
6.6.1 Pipe transits
48 6.6.2 Branches
6.6.2.1 Branches in steel pipes
51 6.6.2.2 Branches in Copper Pipes
6.6.3 Joints
6.6.3.1 General requirements for joints
52 6.6.3.2 Flanged joints
6.6.3.3 Threaded joints
6.6.3.4 Joints between different materials
53 6.6.4 Ancillaries
6.6.4.1 Spheroidal graphite/nodular iron
6.6.4.2 Underground isolating valves
54 6.6.4.3 Above ground isolating valves
6.6.4.4 Appliance isolating valves
6.6.5 Above ground pipework inside and outside buildings
6.6.5.1 General
6.6.5.2 Stress calculations for metallic pipes
55 6.6.5.3 Supporting horizontal metallic pipework
56 6.6.5.4 Supporting vertical metallic pipework
6.6.5.5 Positioning adjacent to floors
6.6.5.6 Appliance Connection
57 6.6.5.7 Electrical interference
6.6.6 Buried pipework
6.6.6.1 Distance between gas pipework and other buried systems
58 6.6.6.2 Support for valves and other ancillaries in buried pipework
6.6.6.3 Depth of cover
6.6.6.4 Precautions at crossings with on-site roads and on-site rail tracks
59 6.6.6.5 Protection of stainless steel pipework
6.6.6.6 Insulating joints
6.6.6.7 Support for buried pipework
6.6.6.8 Impermeable surfaces
6.6.7 Wall thickness related to bending of steel pipes
60 6.6.8 Provision for expansion and flexibility
6.7 Hot tapping carbon steel pipe
6.7.1 General
6.7.2 Principles
6.7.3 Conditions
61 6.7.4 Design evaluation
7 Design of pressure control systems
7.1 General
62 7.2 Pressure regulating system
7.3 Instrumentation
63 7.4 Permanent bypasses
7.4.1 Bypasses for equalization or testing
7.4.2 Bypasses of the safety system
7.5 Construction requirements
7.5.1 Pressure resistance
7.5.2 Operation
7.5.3 Insulating joint/flange
7.5.4 Gas velocity
7.5.5 External sensing lines
64 7.5.6 Breather and vent pipes
7.5.6.1 Pressure resistance
7.5.6.2 Combination of breather and vent pipes
7.5.6.3 Isolation of instrumentation, breather and vent pipes
7.5.6.4 Vent and breather termination
65 7.5.7 Isolating valves
7.5.8 Filter, separators
7.5.9 Pressure gauges
7.5.10 Pressure tappings and purge connections
7.6 Low gas temperature
7.6.1 Functional requirements
7.6.2 Design temperature effects
66 7.6.3 Condensation
7.7 Gas compressors
7.7.1 Construction
7.7.2 Temperature rise
7.7.3 Pressure variation
7.8 Safety systems
7.8.1 Pressure safety system
7.8.1.1 General
7.8.1.2 Operating principles of pressure safety systems
67 7.8.1.3 Applications
68 7.8.1.4 Non-venting pressure safety devices
69 7.8.2 Gas pressure compressors
7.8.2.1 Reverse flow
70 7.8.2.2 Low inlet pressure
7.8.2.3 High outlet pressure
7.8.3 Gas mixing systems
8 Construction
8.1 Identification of the installation
8.1.1 Installation drawings
8.1.2 Identification of the components
8.1.2.1 Pipes and pieces of pipes
8.1.2.2 Fittings
8.1.3 Weld identification
71 8.2 External hazards
8.2.1 Mechanical loads
8.2.2 Electric currents
8.2.2.1 Protective conductor
8.2.2.2 Stray currents
8.2.2.3 Insulating joint
8.2.3 Environmental influences
8.3 Gas pipework passing through exterior walls
8.3.1 Buried pipe transits
73 8.3.2 Aboveground pipe transits
74 8.4 Identification of pipework
8.4.1 Identification of above-ground pipework
8.4.2 Identification of buried pipework
8.5 Specifications and requirements for joints
8.5.1 Welded joints and pipe fittings in carbon steel and stainless steel pipes
8.5.1.1 General
8.5.1.2 Heat treatment
8.5.1.3 Welding procedures and welding procedure specification for pipework
75 8.5.1.4 Welder’s competence
8.5.1.5 Preparation
8.5.1.6 Alignment of pipes
8.5.1.7 Weather conditions
8.5.1.8 Electrodes
8.5.1.9 Weld details
79 8.5.1.10 Special welding fittings
8.5.2 Joints in copper pipework
8.5.3 Fusion joints in plastic pipes
8.5.4 Flange joints
8.5.5 Compression joints
8.5.6 Threaded joints
8.6 Joint suitability
80 8.7 Connections
8.7.1 Connection points/pipe ends
8.7.2 Appliance isolating valves
81 8.8 Corrosion protection
8.8.1 Metal-to-metal contact
8.8.2 Above-ground protection of pipework
8.8.2.1 General
8.8.2.2 Protection systems in corrosive environments
82 8.8.2.3 Harmful effects to pipe coatings
83 8.8.2.4 Pipework with thermal and/or acoustic insulation
8.8.3 Protection of buried pipework
8.8.3.1 Protection respecting materials
84 8.8.3.2 Protection of ancillaries and joints
8.8.3.3 Cathodic protection for carbon steel pipework
86 8.8.4 Corrosion at pipe supports
8.9 Handling and installation of pipework
8.9.1 PE pipework
8.9.1.1 Surface condition
8.9.1.2 Storage, handling and transportation
8.9.1.3 Installation and laying
8.9.2 Steel pipework
8.9.2.1 Surface condition
87 8.9.2.2 Storage, handling and transportation
8.9.2.3 Installation and laying
8.9.3 Copper pipework
8.9.3.1 Surface condition
8.9.3.2 Storage, handling and transportation
8.9.3.3 Installation
8.9.4 Pipe trench filling
88 8.10 Bending of pipes
8.10.1 Bending of steel pipes
8.10.1.1 General
8.10.1.2 Carbon steel grade L195 less than or equal to 10 bar
8.10.1.3 Other steel grades and sizes
8.10.1.4 Heat treatment
8.10.2 PE pipe bending
89 8.10.3 Copper pipe bending
8.11 Welding of supports and anchor points to carbon steel pipework
90 8.12 Installation of pressure regulating systems
8.12.1 Protection of the installation space
8.12.1.1 Breather apertures
91 8.12.1.2 Location of outlets from vent pipes
8.12.1.3 Discharge opening of creep relief valve
8.12.2 Construction requirements
8.12.2.1 Precautions
8.12.2.2 Pressure balancing
8.12.2.3 Combined control and safety devices
9 Documentation, inspection and testing
9.1 General
92 9.2 Documentation
9.2.1 General
9.2.2 Technical file
93 9.3 Inspection
9.3.1 Joint inspection
9.3.1.1 Welding of steel
97 9.3.1.2 Brazing of copper
9.3.1.3 Welding of Thermoplastic
9.3.2 Corrosion protection
9.3.2.1 Coatings on buried pipework
9.3.2.2 Above ground protection
9.3.3 Recording of test results
98 9.4 Testing
9.4.1 General
9.4.2 Instrumentation
99 9.4.3 Test Media
9.4.4 Strength testing
100 9.4.5 Tightness testing
9.4.6 Procedure for strength and tightness testing
9.4.7 Safety during tests
101 9.4.8 Hot tapping
9.4.9 Pressure regulating systems and ancillaries
9.4.10 Recording of test results
102 Annex A (informative)Examples of methods for testing
A.1 General
A.2 Strength test on metallic pipework
A.2.1 Duration
A.2.2 Conditions
103 A.2.3 Pneumatic testing
A.2.4 Hydrostatic testing
A.2.5 Pressure assessment
104 A.3 Tightness test on metallic pipework
A.3.1 General
A.3.2 Pipework which can be inspected visually
A.3.2.1 Conditions
A.3.2.2 Tightness test using a pressure gauge
A.3.2.3 Tightness test using foaming liquids
105 A.3.3 Pipework which cannot be inspected fully by visual means
A.3.3.1 Conditions
A.3.3.2 Differential manometer and reference vessel (using air or inert gas as test medium)
A.3.3.3 Pressure balance test
106 A.4 Strength and tightness test on PE pipework
108 Annex B (informative)Flammable gases mixing systems
B.1 Reverse Flow
B.2 Control of mixture composition
110 B.3 Matching pressures of components for mixing
111 Annex C (informative)Examples of supports
119 Annex D (normative)Materials
D.1 General
122 D.2 Materials with a demonstrated safe history of application in this type of equipment
124 Annex E (informative)Significant technical changes between this European standard and the previous version EN 15001-1:2009
129 Annex ZA (informative)Relationship between this European Standard and the essential requirements of EU Directive 2014/68/EU aimed to be covered

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BS EN 15001-1:2023
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