DIN 2566 Flange

DIN 2566 refers to a German standard for threaded (screwed) flanges, designed for pipe connections without welding. Threaded flanges are typically used in small-diameter, high-pressure, or non-weldable piping systems.

High Quality DIN 2566 Flange

Pressure Ratings:DIN 2566 flanges are available in the following pressure classes:

PN6, PN10, PN16, PN 16 is the most commonly used pressure rating, suitable for general-purpose industrial piping.

Size Range: DIN 2566 flanges usually cover:

Nominal Diameters DN10 to DN150
Larger sizes may exist but are rarely used in practice

Common Materials for DIN 2566 Flanges

Material Type	Common Grades (EN Standard)	ASTM Equivalent
Carbon Steel	P250GH, C22.8, S235JR, S355J2	ASTM A105, A350 LF2
Stainless Steel	1.4301, 1.4307, 1.4401, 1.4571	ASTM 304, 304L, 316, 316Ti

Typical Applications of DIN 2566 Flange

DIN 2566 threaded flanges are widely used in:

Compressed air and gas pipelines
Hydraulic systems
Chemical and petrochemical plants
Water supply systems
Maintenance and temporary connections

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More Information about DIN 2566 Flange

✅ Advantages

No welding required – ideal for explosive or flammable environments
Easy installation and disassembly
Good for maintenance or temporary systems
Cost-effective for small-bore pipework

❌ Disadvantages

Not suitable for large diameters or vibration-prone systems
Threaded connections can leak under thermal cycling
Limited to moderate pressure and temperature

DIN 2566 PN16 Flange Dimensions

PN 16 is the most commonly used pressure rating, suitable for general-purpose industrial piping.

DN	d	Thread DIN 2999	D	b	k	h1	d3	d4	f	No.of holes	d2	KG
6	10.2	R1/8	75	12	50	18	20	32	2	4	11	0.33
8	13.5	R1/4	80	12	55	18	25	38	2	4	11	0.39
10	17.2	R3/8	90	14	60	20	30	40	2	4	14	0.56
15	21.3	R1/2	95	14	65	20	35	45	2	4	14	0.62
20	26.9	R3/4	105	16	75	24	45	58	2	4	14	0.92
25	33.7	R1	115	16	85	24	52	68	2	4	14	1.1
32	42.4	R1.1/4	140	16	100	26	60	78	2	4	18	1.59
40	48.3	R1.1/2	150	16	110	26	70	88	3	4	18	1.77
50	60.3	R2	165	18	125	28	85	102	3	4	18	2.41
65	76.1	R2.1/2	185	18	145	32	105	122	3	4	18	3.13
80	88.9	R3	200	20	160	34	118	138	3	4	18	3.95
100	114.3	R4	220	20	180	38	140	158	3	8	18	4.38
125	139.7	R3	250	22	210	40	168	188	3	8	18	5.99
150	168.3	R4	285	22	240	44	196	212	3	8	22	7.42

Comparison: DIN 2566 vs. EN 1092-1 Type 13

Item	DIN 2566	EN 1092-1 Type 13
Type	Threaded flange (female thread)	Threaded flange (female thread)
Standard Origin	German national standard	European/international standard
Replacement Status	Older standard, mostly replaced by EN 1092-1	Current European standard
Thread Type	Typically Rp (BSPT) or Rc (conical/parallel)	ISO 7-1 or optional customized threads
Pressure Ratings	PN 6, PN 10, PN 16	PN 6 to PN 40 (more comprehensive coverage)
Size Range	DN 10 – DN 150 (commonly)	DN 10 – DN 200 (more extensive size availability)
Materials	Carbon steel, stainless steel	Carbon steel, stainless steel, alloy steel
Applications	Piping systems where welding is not feasible	Same applications, broader international use
Interchangeability	Limited interchangeability with EN flanges	Designed for compatibility within EN systems
Use in Modern Projects	Less common in new designs	Widely accepted in EU and global projects