This Part of EN 10253 specifies the technical delivery requirements for seamless and welded butt-welding
fittings (elbows, concentric and eccentric reducers, equal and reducing tees, caps) made of carbon and alloy
steel which are intended for pressure purposes at room temperature, at low temperature or at elevated
temperatures, and for the transmission and distribution of fluids and gases.
It specifies:
- type of fittings ;
- type A : Butt-welding fittings with reduced pressure factor ;
- type B : Butt-welding fittings for use at full service pressure ;
- steel grades ;
- mechanical properties ;
- dimensions and tolerances ;
- requirements for inspection and testing ;
- inspection documents ;
- marking ;
- protection and packaging.
NOTE In the case of a harmonised supporting standard for materials, presumption of conformity to the ESRs is limited
to technical data of materials in the standard and does not presume adequacy of the material to a specific item of
equipment. Consequently it is essential that the technical data stated in the material standard be assessed against the
design requirements of this specific item of equipment to verify that the ESRs of the PED are satisfied.
BS EN 10253-2:2007 Referenced Document
EN 10020:2000 Definition and classification of grades of steel
EN 10021:2006 General technical delivery conditions for steel products*， 2024-04-18 Update
EN 10027-1 Designation Systems for Steels - Part 1: Steel Names
EN 10027-2 Designation systems for steels - Part 2: Numerical system*， 2015-04-01 Update
EN 10028-2 Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels with specified elevated temperature properties*， 2017-07-01 Update
EN 10028-3 Flat products made of steels for pressure purposes - Part 3: Weldable fine grain steels@ normalized*， 2017-07-01 Update
EN 10028-4 Flat products made of steels for pressure purposes - Part 4: Nickel alloy steels with specified low temperature properties*， 2017-07-01 Update
EN 10052:1993 Vocabulary of Heat Treatment Terms for Ferrous Products
EN 10168 Steel products - Inspection documents - List of information and description
EN 10204 Metallic products - Types of inspection documents*， 2024-04-18 Update
EN 10217-1 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 1: Electric welded and submerged arc welded non-alloy steel tubes with specified room temperature properties
EN 10217-2 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 2: Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties*， 2019-04-17 Update
EN 10217-3 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 3: Electric welded and submerged arc welded alloy fine grain steel tubes with specified room, elevated and low temperature properties*， 2019-04-17 Update
EN 10217-4 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 4: Electric welded non-alloy steel tubes with specified low temperature properties*， 2019-04-17 Update
EN 10217-5 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*， 2019-04-17 Update
EN 10217-6 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 6: Submerged arc welded non-alloy steel tubes with specified low temperature properties*， 2019-04-17 Update
EN 1418 Welding Personnel - Approval Testing of Welding Operators for Fusion Welding and Resistance Weld Setters for Fully Mechanized and Automatic Welding of Metallic Materials
EN 287-1 Qualification test of welders - Fusion welding - Part 1: Steels Incorporating Corrigendum August 2004; Includes Amendment A2:2006
EN 910 Destructive Tests on Welds in Metallic Materials - Bend Tests
BS EN 10253-2:2007 history
2021BS EN 10253-2:2021 Butt-welding pipe fittings. Non alloy and ferritic alloy steels with specific inspection requirements
2007BS EN 10253-2:2007 Butt-welding pipe fittings - Non alloy and ferritic alloy steels with specific inspection requirements
1968BS 1640-3:1968 Specification for steel butt-welding pipe fittings for the petroleum industry - Wrought carbon and ferritic alloy steel fittings - Metric units
1963BS 1965-1:1963 Specification for butt-welding pipe fittings for pressure purposes. Carbon steel
1962BS 1640-1:1962 Specification for steel butt-welding pipe fittings for the petroleum industry - Wrought carbon and ferritic alloy steel fittings