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BSI BS EN 10253-4:2025

Butt-welding pipe fittings -- Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements
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BSI BS EN 10253-4:2025

Butt-welding pipe fittings -- Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements

PUBLISH DATE 2025
PAGES 144
BSI BS EN 10253-4:2025
This document specifies the technical delivery requirements for seamless and welded butt-welding fittings (elbows, concentric and eccentric reducers, equal and reducing tees, caps) made of austenitic and austenitic-ferritic (duplex) stainless steel in two test-categories 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: a) type of fittings; 1) type A: butt-welding fittings with reduced pressure factor; 2) type B: butt-welding fittings for use at full service pressure; b) steel grades and their chemical compositions; c) mechanical properties; d) dimensions and tolerances; e) requirements for inspection and testing; f) inspection documents; g) marking; h) protection and packaging. NOTE The selection of the appropriate fitting (material, thickness) is the ultimate responsibility of the manufacturer of the pressure equipment (see European Legislation for Pressure Equipment). In the case of a harmonized 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.
SDO BSI: British Standards Institution
Document Number EN 10253-4
Publication Date July 3, 2025
Language en - English
Page Count 144
Revision Level
Supercedes
Committee ISE/110
Publish Date Document Id Type View
July 3, 2025 BS EN 10253-4:2025 Revision
April 30, 2008 BS EN 10253-4:2008 Revision
Aug. 31, 2009 BS EN 10253-4:2008 Consolidated