BS EN10253-3 Butt-welding pipe fittings Part 3:Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements

1 Scope
1.1 This part of EN 10253 specifies the technical delivery requirements for seamless and welded buttwelding fittings (elbows, concentric and eccentric reducers, equal and reducing tees, caps) made of austenitic and austenitic–ferritic (duplex) stainless steel without specific inspection requirements.
It specifies:
 steel grades;
 mechanical properties;
 dimensions and tolerances;
 requirements for inspection and testing;
 inspection documents;
 marking;
 handling and packaging.
1.2 Limitation of use
The allowed pressures and temperatures are the responsibility of the customer according to the state of the art and in application of the safety coefficients in the application regulations, codes and standards. In common, joint coefficient is used in the calculation of the thicknesses of components which include one or several butt welds, other than circumferential:
 for equipment subject to random non-destructive testing: 0,85;
 for equipment not subject to non-destructive testing other than visual inspection: 0,7.
1.3 Unless otherwise specified in this part of EN 10253 the general technical delivery requirements in EN 10021 apply.

2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 287-1, Qualification test of welders — Fusion welding — Part 1: Steels
EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials — Welding procedure specification — Part 1: Arc welding (ISO 15609-1:2004)
EN 910, Destructive tests on welds in metallic materials — Bend tests
EN 1418, Welding personal — Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic materials
EN 10002-1, Metallic materials — Tensile testing — Part 1: Method of test at ambient temperature
EN 10002-5, Metallic materials — Tensile testing — Part 5: Method of testing at elevated temperature
EN 10020:2000, Definition and classification of grades of steel
EN 10021:2006, General technical delivery conditions for steel products
EN 10027-1, Designation systems for steel — Part 1: Steel names
EN 10027-2, Designation systems for steel — Part 2: Numerical system
EN 10028-7, Flat products made of steels for pressure purposes — Part 7: Stainless steels
EN 10052, Vocabulary of heat treatment terms for ferrous products
EN 10079:2007, Definition of steel products
EN 10088-2, Stainless steels — Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes
EN 10088-3, 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 10168, Steel products — Inspection documents — List of information and description
EN 10204, Metallic products — Types of inspection documents
EN 10216-5, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 5: Stainless steel tubes
EN 10217-7, Welded steel tubes for pressure purposes — Technical delivery conditions — Part 7: Stainless steel tubes
EN ISO 8493, Metallic materials — Tubes — Drift-expanding test (ISO 8493:1998)
EN ISO 8495, Metallic materials — Tubes — Ring expanding test (ISO 8495:1998)
EN 10266, Steel tubes, fittings and structural hollow sections — Symbols and definitions of terms for use in product standards
EN 10272, Stainless steel bars for pressure purposes
EN 10296-2, Welded circular steel tubes for mechanical and general engineering purposes — Technical delivery conditions —Part 2: Stainless steel
EN 10297-2, Seamless steel tubes for mechanical and general engineering purposes — Technical delivery conditions — Part 2: Stainless steel
EN 13445-3, Unfired pressure vessels — Part 1: Design
EN 13480-1, Metallic industrial piping — Part 1: General
EN ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997)
EN ISO 2566-2, Steel — Conversion of elongation values — Part 2: Austenitic steels (ISO 2566-2:1984)
EN ISO 3166-1, Codes for the representation of names of countries and their subdivisions — Part 1: Country codes (ISO 3166-1:2006)
EN ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels — Part 2: Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing sulfuric acid (ISO 3651-2:1998)
EN ISO 9001, Quality management systems — Requirements (ISO 9001:2000)
EN ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical composition (ISO 14284:1996).

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