DIN EN 10253-4 E 2017-11 PDF

Full title and description

STB DIN EN 10253-4 E 2017-11 — Butt-welding pipe fittings — Part 4: Wrought austenitic and austenitic‑ferritic (duplex) stainless steels with specific inspection requirements. German and English version (prEN 10253-4:2017); issued 13 October 2017 and published as a draft edition in November 2017.

Abstract

This draft European standard specifies technical delivery requirements for seamless and welded butt‑welding fittings (elbows, concentric and eccentric reducers, equal and reducing tees, caps) made from austenitic and duplex (austenitic‑ferritic) stainless steels. It defines two test categories (Type A — reduced pressure factor; Type B — full service pressure), required steel grades, mechanical properties, dimensional and tolerance limits, inspection and testing regimes (including NDT), inspection documentation, marking, handling and packaging.

General information

• Status: Draft standard (prEN 10253-4:2017) — recorded as withdrawn later and superseded by a 2025 edition.
• Publication date: November 2017 (date of issue: 13 October 2017).
• Publisher: Deutsches Institut für Normung (DIN) / European committee drafting as prEN (CEN).
• ICS / categories: 23.040.40 (Metal fittings); 77.140.20 (Stainless steels); related entries for hydrogen technologies in some listings.
• Edition / version: prEN 10253‑4:2017 (German and English bilingual draft; designation in some catalogues shown as DIN EN 10253‑4:2017‑11).
• Number of pages: 302 pages (draft document listing).

Scope

Specifies the technical delivery conditions for butt‑welding fittings for welding‑in (elbows, reducers, tees, caps) manufactured from austenitic and austenitic‑ferritic (duplex) stainless steels. The standard covers material grades, permitted manufacturing routes (seamless and welded), two test categories (Type A and Type B), mechanical and impact properties, dimensional requirements and tolerances, specific inspection and non‑destructive testing requirements, inspection documentation, marking, handling and packaging for pressure and fluid‑transmission service at room, low and elevated temperatures.

Key topics and requirements

• Scope of fittings covered: elbows, concentric/eccentric reducers, equal and reducing tees, caps (welding‑in type).
• Materials: austenitic and austenitic‑ferritic (duplex) stainless steel grades and associated chemical/compositional limits.
• Test categories: Type A (reduced pressure factor) and Type B (full service pressure) with differing test/inspection regimes.
• Mechanical properties and impact testing requirements (temperature ranges and acceptance criteria).
• Dimensional and tolerance tables for butt‑weld fittings and mandatory marking/traceability data.
• Inspection and testing: mandatory inspection documents, non‑destructive testing (including ultrasonic methods where applicable), and lot/inspection acceptance rules.
• Handling, packaging and delivery conditions (documentation of conformity, certificates).

Typical use and users

Used by manufacturers and suppliers of stainless steel butt‑welding fittings, piping system specifiers, mechanical and process engineers, fabricators, inspection bodies and purchasers specifying fittings for pressure piping systems in chemical, petrochemical, power, offshore, and other industries where corrosion resistance and specific inspection regimes are required.

Related standards

Part of the EN 10253 series (other parts cover carbon/manganese steels and additional requirements). Closely related to pipe and materials standards such as EN 10216‑5 (stainless steel tubes), EN ISO 5817 (welding quality levels), EN 10204 (inspection documents) and NDT/UT standards referenced for inspection of austenitic/duplex steels. Later consolidated and updated in the EN 10253‑4:2025 edition.

Keywords

Butt‑welding fittings, stainless steel, duplex, austenitic, prEN 10253‑4:2017, inspection requirements, Type A, Type B, dimensions, non‑destructive testing, mechanical properties, marking, DIN.

FAQ

Q: What is this standard?

A: It is the draft European standard prEN 10253‑4:2017 (published as DIN EN 10253‑4:2017‑11 in catalogues) that sets technical delivery and inspection requirements for butt‑welding pipe fittings made from austenitic and duplex stainless steels.

Q: What does it cover?

A: It covers which fittings are included (elbows, reducers, tees, caps), applicable stainless steel grades, two test categories (reduced and full service), mechanical and impact properties, dimensions and tolerances, inspection and NDT requirements, documentation, marking, handling and packaging for pressure service.

Q: Who typically uses it?

A: Manufacturers, purchasers and specifiers of stainless steel butt‑welding fittings, piping and process engineers, fabricators and inspection/third‑party testing organizations.

Q: Is it current or superseded?

A: The 2017 draft listing is recorded as withdrawn; the content for EN 10253‑4 has been updated and replaced by a 2025 edition (EN/DIN EN 10253‑4:2025). Sources list the draft/withdrawn 2017 document and the 2025 published replacement. Users should refer to the 2025 edition for the latest requirements.

Q: Is it part of a series?

A: Yes — EN 10253 is a multi‑part series addressing butt‑welding pipe fittings for different materials and special inspection requirements; Part 4 specifically addresses austenitic and duplex stainless steels.

Q: What are the key keywords?

A: Butt‑welding fittings, stainless steel, duplex, austenitic, inspection, testing, prEN 10253‑4, dimensions, NDT, marking.