British Standards Institution

Sector: Manufacturing

Overview: Under the direction of the Standards Policy and Strategy Committee, is responsible for UK input to certain sub committees and working group of ISO/TC 5/SC 10 and CEN/TC 74, and for standards related to flanges in pipelines and piping systems (except for those used for hydraulic and pneumatic load transmission) including dimensions, tolerances, material selection, fixing selection (e.g. nuts and bolts), delivery conditions, calculation methods and gaskets.

Committee standards activity

In Progress (7)

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Reference	Standards description	Status ? The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
ISO/TC 5/SC 10 N411 ISO/NP 7005-2 (Ed 2)	Metallic flanges -- Part 2: Cast iron flanges Categories: Information management \| Standardization. General rules \| Engineering \| Fluid systems and components \| Flanges, couplings and joints Proposal begins : 2021-09-22	Proposal
ISO/TC 5/SC 10 N409 ISO/NP 7005-1	Pipe flanges -- Part 1: Steel flanges for industrial and general service piping systems Categories: Information management \| Standardization. General rules \| Engineering \| Fluid systems and components \| Pipelines \| Flanges, couplings and joints Proposal begins : 2021-09-21	Proposal
BS ISO 7005-2	Metallic flanges. Part 2: Cast iron flanges Categories: Flanges, couplings and joints Drafting begins : 2017-02-27	Drafting
BS EN 1759-4	Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, Class designated. - Part 4: Aluminium alloy flanges Categories: Flanges, couplings and joints Public comment begins : 2021-12-16	Public comment
BS EN 1759-3	Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, Class designated. - Part 3: Copper alloy flanges Categories: Flanges, couplings and joints Public comment begins : 2021-12-23	Public comment
BS EN 1092-3	Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated. - Part 3: Copper alloy flanges Categories: Flanges, couplings and joints Public comment begins : 2021-12-23	Public comment
BS EN 1092-1:2018/A1	Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated. - Part 1: Steel flanges Categories: Flanges, couplings and joints Comment resolution begins : 2025-08-13	Comment resolution

Published (33)

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Reference	Standards description	Status ? The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
PD CEN/TR 1591-6:2025	Flanges and their joints. Design rules for gasketed circular flange connections. Background information Categories: Flanges, couplings and joints Published standard begins : 2025-01-24	Published standard
PD CEN/TR 1591-5:2012	Flanges and their joints. Design rules for gasketed circular flange connections. Calculation method for full face gasketed joints Categories: Flanges, couplings and joints Published standard begins : 2012-03-12	Published standard
PD CEN/TR 1591-2:2020	Flanges and their joints. Design rules for gasketed circular flange connections. Gasket parameters Categories: Flanges, couplings and joints Published standard begins : 2020-04-14	Published standard
DD CEN/TS 1591-3:2007	Flanges and their joints. Design rules for gasketed circular flange connections. Calculation method for metal to metal contact type flanged joint Categories: Flanges, couplings and joints Published standard begins : 2007-09-20	Published standard
BS ISO 7005-1:2011	Pipe flanges. Steel flanges for industrial and general service piping systems Categories: Flanges, couplings and joints Published standard begins : 2011-08-11	Published standard
BS EN 1759-4:2003	Flanges and their joints. Circular flanges for pipes, valves, fittings and accessories, class designated. Aluminium alloy flanges Categories: Flanges, couplings and joints Published standard begins : 2003-10-01	Published standard
BS EN 1759-3:2003	Flanges and their joints. Circular flanges for pipes, valves, fittings and accessories, class designated. Copper alloy flanges Categories: Flanges, couplings and joints Published standard begins : 2004-03-12	Published standard
BS EN 1759-1:2004	Flanges and their joints. Circular flanges for pipes, valves, fittings and accessories, class-designated. Steel flanges, NPS 1/2 to 24 Categories: Flanges, couplings and joints Published standard begins : 2004-11-29	Published standard
BS EN 1591-4:2013	Flanges and their joints. Qualification of personnel competency in the assembly of the bolted connections of critical service pressurized systems Categories: Management. Human resources \| Flanges, couplings and joints Published standard begins : 2013-08-28	Published standard
BS EN 1591-1:2024	Flanges and their joints. Design rules for gasketed circular flange connections. Calculation Categories: Flanges, couplings and joints Published standard begins : 2024-10-04	Published standard

Withdrawn (18)

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Reference	Standards description	Status ? The standards development process is divided into chronological stages: Proposal; Drafting; Public comment; Comment resolution; Approval; Published standard.
DD CEN/TS 1591-4:2007	Flanges and their joints. Design rules for gasketed circular flange connections. Qualification of personnel competency in the assembly of bolted joints fitted to equipment subject to the Pressure Equipment Directive Categories: Flanges, couplings and joints Withdrawn begins : 2013-08-28	Withdrawn
BS EN 1591-2:2008	Flanges and their joints. Design rules for gasketed circular flange connections. Gasket parameters Categories: Flanges, couplings and joints Withdrawn begins : 2009-06-04	Withdrawn
BS EN 1591-1:2013	Flanges and their joints. Design rules for gasketed circular flange connections. Calculation Categories: Flanges, couplings and joints Withdrawn begins : 2024-10-04	Withdrawn
BS EN 1591-1:2001+A1:2009	Flanges and their joints. Design rules for gasketed circular flange connections. Calculation method Categories: Flanges, couplings and joints Withdrawn begins : 2011-06-23	Withdrawn
BS EN 1591-1:2001	Flanges and their joints. Design rules for gasketed circular flange connections. Calculation method Categories: Flanges, couplings and joints Withdrawn begins : 2009-06-02	Withdrawn
BS EN 1515-4:2021	Flanges and their joints. Bolting. Selection of bolting for equipment subject to the Pressure Equipment Directive 2014/68/EU Categories: Bolts, screws, studs \| Nuts \| Flanges, couplings and joints Withdrawn begins : 2022-09-02	Withdrawn
BS EN 1515-4:2009	Flanges and their joints. Bolting. Selection of bolting for equipment subject to the Pressure Equipment Directive 97/23/EC Categories: Bolts, screws, studs \| Nuts \| Flanges, couplings and joints Withdrawn begins : 2021-04-21	Withdrawn
BS EN 1514-2:2014	Flanges and their joints. Gaskets for PN-designated flanges. Spiral wound gaskets for use with steel flanges Categories: Pipe and hose assemblies. Seals Withdrawn begins : 2021-02-03	Withdrawn
BS EN 1514-2:2005	Flanges and their joints. Dimensions of gaskets for PN-designated flanges. Spiral wound gaskets for use with steel flanges Categories: Pipe and hose assemblies. Seals Withdrawn begins : 2014-09-29	Withdrawn
BS EN 14772:2005	Flanges and their joints. Quality assurance inspection and testing of gaskets in accordance with the series of standards EN 1514 and EN 12560 Categories: Flanges, couplings and joints \| Pipe and hose assemblies. Seals Withdrawn begins : 2021-01-25	Withdrawn

Standards Development

PSE/15 - Flanges

Committee standards activity