DIN EN 10253-2 2021-11 PDF

Full title and description

DIN EN 10253-2:2021-11 — Butt-welding pipe fittings - Part 2: Non-alloy and ferritic alloy steels with specific inspection requirements. This document specifies technical delivery conditions for welded and seamless butt-welding fittings (elbows, concentric and eccentric reducers, tees with equal and reduced branch, caps) made from unalloyed and ferritic alloy steels intended for pressure purposes and for the transport and distribution of fluids and gases.

Abstract

Defines product types, material grades, chemical composition and mechanical properties, dimensional and tolerance requirements, two inspection / testing categories (typical Type A and Type B distinction), specific non-destructive and mechanical test requirements (including impact testing where required), manufacturer’s inspection documents and marking, plus packaging and protection for butt-welding pipe fittings intended for pressure applications. The standard is presented in English and German as a harmonized European standard adopted as a DIN publication.

General information

• Status: Current (active national adoption of EN 10253-2).
• Publication date: 01 November 2021.
• Publisher: Deutsches Institut für Normung (DIN) — adoption of EN 10253-2.
• ICS / categories: 23.040.40 (Metal fittings); 77.140.45 (Non-alloyed steels); 77.140.20 (Stainless steels).
• Edition / version: 2021-11 (DIN EN 10253-2:2021-11).
• Number of pages: 143 (DIN edition, published text).

Scope

This part of EN 10253 lays down the technical delivery conditions for wrought butt-welding fittings made of non-alloy and ferritic alloy steels that have specific inspection requirements because they are intended for use under pressure (including at room, low or elevated temperatures). It covers designation, required purchaser information, material grades and composition, mechanical properties, dimensional requirements and tolerances, inspection and test regimes, manufacturer’s test certificates and marking, plus special packaging and protection instructions. It does not replace design codes — the user must choose the correct part and material for the intended pressure equipment or piping application.

Key topics and requirements

• Classification of product types (examples: Type A — reduced utilisation; Type B — full utilisation) and required information to be supplied by the purchaser.
• Permitted steel grades, chemical composition limits and designation rules for unalloyed and ferritic alloy steels intended for pressure applications.
• Mechanical property requirements (tensile, yield where applicable) and mandatory tests (hardness, tensile, impact tests for low-temperature service where specified).
• Dimensional and tolerance tables for elbows, reducers, tees and caps, including wall thickness ranges and nominal bore references.
• Non-destructive testing and inspection requirements (e.g., visual, radiographic/UT options where required), acceptance criteria and classification into inspection categories.
• Manufacturer’s inspection documentation (e.g., inspection certificates to EN 10204), marking, traceability and packaging/handling instructions for delivery.
• Requirements that enable use of fittings in pressure equipment applications subject to applicable statutory/regulatory codes (selection responsibility remains with purchaser/design authority).

Typical use and users

Used by manufacturers of welded butt-welding fittings, pipework fabricators, procurement teams, piping and pressure equipment designers, inspection and testing laboratories, oil & gas, chemical and petrochemical plants, power generation, water and district heating utilities and any organisation specifying or receiving butt-weld fittings for pressure service. Engineers and quality managers use the standard to specify acceptance tests, material grades, documentation and marking for contract purchases.

Related standards

Part of the EN 10253 series: EN 10253-1 (wrought carbon steel for general use, without specific inspection requirements), EN 10253-3 and EN 10253-4 (austenitic and duplex stainless steels, with and without specific inspection requirements). DIN EN 10253-2:2021 replaces earlier national/adopted editions of EN 10253-2 (for example the 2007 edition) and aligns the national publication with the EN text. It is commonly used alongside applicable design and pressure equipment codes and related welding and testing standards.

Keywords

Butt-welding pipe fittings; fittings for welding; non-alloy steels; ferritic alloy steels; pressure fittings; elbows; reducers; tees; caps; inspection requirements; mechanical testing; EN 10253-2; DIN adoption; manufacturer’s inspection certificate.

FAQ

Q: What is this standard?

A: DIN EN 10253-2:2021-11 is the national (DIN) publication of EN 10253-2 (2021) that specifies technical delivery conditions for butt-welding pipe fittings made from non-alloy and ferritic alloy steels where specific inspection requirements apply.

Q: What does it cover?

A: It covers types of butt-welding fittings (elbows, reducers, tees, caps), material grades and chemical composition limits, mechanical properties, dimensions and tolerances, inspection and test requirements (including impact and NDT where specified), marking, documentation and packaging for fittings intended for pressure service.

Q: Who typically uses it?

A: Producers of pipe fittings, piping fabricators, specifying engineers, procurement specialists, certification and inspection bodies and operators in industries that use pressurised piping (oil & gas, petrochemical, power, water, district heating, process industries).

Q: Is it current or superseded?

A: The 2021 edition (DIN EN 10253-2:2021-11, published 01 November 2021) is the current adopted edition and replaces earlier editions of EN 10253-2 (for example the 2007 edition). Users should check national standards bodies or the publisher for any corrigenda or amendments published after 01 November 2021.

Q: Is it part of a series?

A: Yes — EN 10253 is a multi-part series. Part 1 covers wrought carbon steels for general use without specific inspection requirements; Part 2 (this document) covers non-alloy and ferritic alloy steels with specific inspection requirements; Parts 3 and 4 cover austenitic and duplex stainless steels (without and with specific inspection requirements respectively).

Q: What are the key keywords?

A: Butt-welding pipe fittings; non-alloy steel; ferritic alloy steel; pressure fittings; inspection requirements; mechanical testing; marking; EN 10253-2; DIN EN 10253-2:2021-11.