7. DIN flange standard

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DIN 2527 Blind Flanges Inox 304 316

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Description

DIN 2527 product is a blind flange according to German standard (DIN), manufactured from stainless steel Inox 304 and Inox 316.

Type : Blind Flange.
Material : Stainless steel 304 and 316.
- Stainless steel 304 : Is a general stainless steel, has good resistance to oxidation and corrosion under normal conditions.
- Stainless Steel 316 : Has higher corrosion resistance than Stainless Steel 304, suitable for applications requiring durability under the influence of chemicals and salty environments.

Applications

Mainly used to close off or block pipes, valves and equipment in the fluid transmission system when it is not necessary to open or connect.
Widely used in industries such as petrochemical, chemical, food and water processing where the requirement of tightness and high durability of flanges is very important.

Standards

DIN 2527 is an important standard in the production and use of blind flanges from stainless steel, meeting high technical requirements and ensuring stable performance in diverse industrial applications.

DIN 2527 specifies the requirements for dimensions, materials, design and testing of stainless steel blind flanges.
Including parameters of working pressure, test pressure, dimensional accuracy and other requirements to ensure safety and efficiency in use.

DIN 2527 Blind Flanges Size and Thickness Table from Stainless Steel 304 and Stainless Steel 316, from 1/2 inch to 24 inch (1 inch = 25.4 mm)

Size (inches)	Outer diameter (mm)	Inside diameter (mm)	Thickness (mm)	Number of holes	Hole diameter (mm)	Hole depth (mm)
1/2	95	14.3	14	4	14.2	8.4
3/4	105	20.6	14	4	14.2	8.4
1	115	27.7	14	4	14.2	8.4
1 1/4	140	36.1	16	4	18.2	10.4
1 1/2	150	42.9	16	4	18.2	10.4
2	165	53.6	16	4	18.2	10.4
2 1/2	190	69.8	18	4	18.2	10.4
3	210	79.4	18	4	18.2	10.4
3 1/2	230	88.9	18	8	18.2	10.4
4	255	102.4	20	8	18.2	10.4
5	280	127	20	8	22.2	12.4
6	320	154	22	12	22.2	12.4
8	380	202	22	12	22.2	12.4
10	445	254	25	12	26.2	14.4
12	520	305	25	16	26.2	14.4
14	585	356	27	16	26.2	14.4
16	650	406	27	16	30.2	16.4
18	710	457	30	16	30.2	16.4
20	775	508	30	20	33.2	18.4
24	900	610	33	20	33.2	18.4

Summary table of common materials of DIN 2527 Blind Flanges from stainless steel Inox 304 and Inox 316

Material	Material code	Classify	Main features
Stainless steel 304	X5CrNi18-10, 1.4301	General stainless steel	Good strength and toughness, resistance to oxidation and corrosion in normal environments.
Stainless steel 316	X5CrNiMo17-12-2, 1.4401	High corrosion resistance stainless steel	Resistant to corrosion from chemicals such as hydrochloric and chlorinated acids, suitable for seawater and chemical environments.