DIN 2695 2021-06 PDF

Full title and description

STB DIN 2695 2021-06 — Diaphragm‑weld packings and weld ring seals for flange connections. This entry corresponds to the Deutsches Institut für Normung (DIN) standard DIN 2695:2021‑06 (original language: German). It specifies types, dimensions, materials and designation rules for diaphragm‑weld gaskets and weld‑ring seals used with flanged pipe connections across a range of pressure classes.

Abstract

DIN 2695:2021‑06 defines requirements for diaphragm‑weld packings and weld ring seals used on flange connections. The standard covers the geometric dimensions, material designations, pressure/class limits and relevant tolerances for welded seal joints, together with marking and identification requirements. It updates and replaces the earlier DIN 2695 editions, aligning gasket/seal specification for flange systems with contemporary flange standards and industry practice.

General information

• Status: Active / Current (latest edition published 2021).
• Publication date: 2021‑06‑01 (June 1, 2021).
• Publisher: Deutsches Institut für Normung e.V. (DIN).
• ICS / categories: 23.040.80 — Seals for pipe and hose assemblies.
• Edition / version: 2021‑06 (DIN 2695:2021‑06).
• Number of pages: 16 pages (German original).

Scope

The standard applies to diaphragm‑weld gaskets and weld‑ring seals for flange connections. It covers diaphragm‑weld packings for flange connections PN 63 up to PN 400 and Class 150 up to Class 2500, and diaphragm‑seal welded joints for flange connections from PN 10 to PN 400 (or the equivalent class designation). The scope includes dimensional series, material designations, tolerances, marking and basic application limits for use in pressure‑containing piping systems.

Key topics and requirements

• Definitions and terminology for diaphragm‑weld packings and weld ring seals.
• Allowed pressure / class ranges (PN and Class designations) and corresponding dimensional series.
• Specified geometric dimensions and tolerances for gasket styles intended for welded attachment to flange faces.
• Material requirements and designation rules (metals, metal combinations, coatings where applicable).
• Marking and identification of finished seals (type, material, size/class).
• Requirements for welding/joint preparation and welded seal interfaces (geometric fit‑up tolerances that affect sealing).
• Reference to relevant flange and joint standards for compatibility and assembly (flange face types, bolt patterns, etc.).

Typical use and users

Used by gasket and sealing‑ring manufacturers, piping and pressure‑system designers, plant and mechanical engineers, oil & gas and petrochemical fabricators, pressure equipment suppliers, procurement/specification teams and testing/inspection personnel. Typical applications include welded flange connections in high‑pressure piping, process plants and other installations where welded diaphragm or weld‑ring seals are specified for reliable metal‑to‑metal sealing.

Related standards

DIN 2695 is used alongside and referenced to a number of flange and gasket standards to ensure system compatibility and correct design, for example: DIN EN 1092 (flanges and their joints), EN 1514 and EN 12560 (gasket dimensioning and types), DIN 1591 (design of gasketed circular flange connections), and international equivalents such as ASME B16.20 / B16.5 for metallic gaskets and flanges. DIN 2695:2021‑06 replaces the earlier DIN 2695:2002‑11 edition.

Keywords

diaphragm‑weld packing, weld ring seal, flange connection, gasket, diaphragm packing, PN, pressure class, flange gasket dimensions, welded seal, DIN 2695, metal gasket, flange joint.

FAQ

Q: What is this standard?

A: This is the DIN standard DIN 2695:2021‑06, titled “Diaphragm‑weld packings and weld ring seals for flange connections.” It sets out dimensions, materials and designation rules for diaphragm‑weld gaskets and weld‑ring seals for use with flanged pipe connections.

Q: What does it cover?

A: It covers types of diaphragm‑weld packings and weld ring seals, their permitted pressure/class ranges, dimensional series and tolerances, material designation, marking and requirements affecting welded seal joints for flange connections (PN and class ranges such as PN 63–PN 400 and Class 150–2500 as applicable).

Q: Who typically uses it?

A: Gasket and seal manufacturers, piping and mechanical engineers, plant designers, fabricators in oil & gas, chemical and process industries, and procurement/specification teams who need standardized requirements for welded flange seals.

Q: Is it current or superseded?

A: DIN 2695:2021‑06 is the current edition published on 1 June 2021. It supersedes and replaces the earlier DIN 2695:2002‑11 edition.

Q: Is it part of a series?

A: It belongs to the family of standards covering flanges, gaskets and flange joints. It is commonly used together with standards such as DIN EN 1092 (flanges), EN 1514 / EN 12560 (gasket dimensions/types), DIN 1591 (gasketed flange design) and relevant international equivalents (for example ASME flange/gasket standards).

Q: What are the key keywords?

A: Diaphragm‑weld packing, weld ring seal, flange connection, gasket dimensions, PN, class, welded seal, DIN 2695, metal gasket, sealing ring.