DIN Pipes Tubes Fittings Standards

Reference data and engineering information about din pipes tubes fittings standards for piping systems applications.

dinpipestubesfittings

Overview

Engineering reference data for DIN Pipes Tubes Fittings Standards in piping systems.

Key Formulas

Continuity

$A_1 v_1 = A_2 v_2$

Mass conservation in pipe flow.

Pressure Drop

$\Delta P = f \frac{L}{D} \frac{\rho v^2}{2}$

Darcy-Weisbach equation.

Pipe Area

$A = \frac{\pi D^2}{4}$

Cross-sectional area of a pipe.

Variables

Symbol	Description	Unit
$D$	Pipe diameter	m
$v$	Flow velocity	m/s
$\Delta P$	Pressure drop	Pa
$f$	Friction factor	—

The DIN (Deutsches Institut für Normung) standards provide comprehensive specifications for industrial pipe, tube, and fitting systems. These standards cover dimensions, materials, testing methods, and technical delivery conditions across a wide range of applications, from drinking water installations to high-pressure industrial systems.

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Summary of major DIN standards for pipe and fitting specifications
DIN Standard(-)	Primary Focus(-)	Component Type(-)
DIN 2609:1991	Technical delivery conditions	Steel butt-welding fittings
DIN 2615-1:1992	Tees with reduced pressure factor	Steel butt-welding fittings
DIN 2616-1:1991	Reducers with reduced pressure factor	Steel butt-welding fittings
DIN 2950:1983	Material & dimensional specifications	Malleable cast iron fittings
DIN 2980:1977	General specifications	Screwed steel fittings
DIN 2993:1977	Union specifications	Threaded steel fittings
DIN 2856:1986	Assembly dimensions & testing	Capillary solder fittings
DIN 3853:2001	Stud ends for union nuts	Compression fittings
DIN 2826:1994	Clamp unit specifications (DN 15-50)	Hose fittings

Source: engineeringtoolbox.com

Key Standards by Application Area

Thread and Connection Systems

DIN 2999 Series (1973-1986): Defines Whitworth pipe threads for tubes and fittings, including cylindrical internal threads, conical external threads, and comprehensive gauging systems. These standards ensure interchangeability and proper sealing in threaded connections.
*DIN 76-2:1984: Specifies thread run-outs and undercuts for pipe threads conforming to ISO 228-1, critical for proper thread engagement and leak prevention.

Flanged Systems

*DIN 2848:2002: Covers flanged steel pipes and flanged steel/cast iron fittings with lining for PN 10, PN 25, and PN 40 pressure ratings.
*DIN 2874:2002: Specifies steel flanged pipes and fittings lined with PTFE or PFA for chemical resistance applications.

Welding Specifications

DIN 2559 Series (1984-1994): Provides detailed edge preparation specifications for welding, including matching of inside diameters for circumferential welds on seamless and welded pipes, with specific sections for stainless steels.

Installation and Support

*DIN 3567:1963 to *DIN 3575:1962: Covers pipe brackets, clamping plates, steel straps, and hanger straps for supporting pipes ranging from NW 20 to 500, essential for proper installation and vibration control.

Specialized Applications

*DIN 2826:1994: Defines hose fittings with clamp units for steam and hot water service (DN 15 to DN 50) rated for pressures up to 18 bar.
*DIN 1230-P1:1992: Specifies vitrified clay fittings for sewerage systems with flexible mechanical joints.

References

Original Source

Source: engineeringtoolbox.com