What is DIN standard?

In the mechanical manufacturing industry, accessories such as flanges, bolts, threaded tyres… are commonly used for assembling parts and machines. These products must all meet DIN standard before being used in the market. In this article, let’s learn more about What is DIN Standard with DAI DUONG! Its history and influence in Global industry.

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What is DIN Standard?
DIN standard in the stainless steel industry
- DIN standards for flanges
- DIN Standard for Bolts

DIN stands for “Deutsches Institut für Normung e.V” means National organization for standardization of German.

DIN standard aims to develop standards and norms, thereby ensuring goods quality, minimizing risks in production, safeness, protecting the environment, meeting supply needs and market expectations in diverse fields such as science and technology, industry, public, government, socioeconomic, intellectual…

The Organization develops and publicates standards in many fields, such as measurement, steel pipe industry, steel accessories such as bolts, screws, flanges, analysis, testing, civil, construction…

DIN is a non-governmental organization, main activity is to develop strictly standards in order to contribute to the raise of the common development of the market, to facilitate the exchange of goods in Germany, related markets and around the world.

History

On December 22nd, 1917, the first DIN organization was established. The original name was “German Industry Standards Committee”. This was the national body for standards and represents the interests of Germany globally in general and European countries in particular. The working range was mainly in industries.

In 1926, besides the industries, range of the organization expanded to many other fields and was renamed the “German Standards Committee”.

At the present, DIN headquarters is located in Berlin and covers more than 30,000 DIN standards spanning all over the industries and modern technology fields.

Influence of DIN standard in Global industry

With more than 100-years history, DIN is one of the most prestigious standards organizations in the world. The standard is recognized and applied in most countries, contributing to the development of other related standards. Along with the other standards such as ASTM, ISO, BS, JIS…, DIN is also one of the most commonly standards applied in the world.

DIN standard represents many related parties such as manufacturers, companies, research institutions, inspection agencies, consumers… in national, EU and international. The process of constructing, appraising and evaluating when developing a new standard is objective and open, receiving suggestions and opinions from relevant experts and organizations, etc., and is supervised by DIN Standards Committees. This makes DIN organization prestigious and very influential globally.

DIN standard structure

DIN: German standard structure (range of German domestic standard and or designed to comply with International standards)
E DIN: draft standard
DIN V: preliminary standard
DIN EN: indicative structure
DIN ISO: improved German standard based on ISO
DIN EN ISO: German standard recognized as European standard

DIN standard in the stainless steel industry

In industrial products, especially steel and stainless steel, DIN standard is commonly applied to mechanical accessories such as flanges, bolts, screws, etc. to ensure safe connection, products quality and durability.

DIN standards for flanges

Flanges are made of stainless steel (SS201, SS304, SS316, SS400…), carbon steel… Flanges with workable pressures PN10, PN16, PN25 are quite popular and widely used in manufacturing, oil refining, petrochemical, chemical, shipbuilding industries…

Flanges according to DIN PN10 standard

Size of Nominal Pipe	D	t	C	Holes	h	G	f	Kg
10	90	14	60	4	14	40	2	0.61
15	95	14	65	4	14	45	2	0.67
20	105	16	75	4	14	58	2	0.94
25	115	16	85	4	14	68	2	1.13
32	140	16	100	4	18	78	2	1.66
40	150	16	110	4	18	88	3	1.89
50	165	18	125	4	18	102	3	2.5
65	185	18	145	4	18	122	3	2.99
80	200	20	160	8	18	138	3	3.61
100	220	20	180	8	18	158	3	4.17
125	250	22	210	8	18	188	3	5.66
150	285	22	240	8	22	212	3	6.97
200	340	24	295	8	22	268	3	9.28
250	395	26	350	12	22	320	3	12.36
300	445	26	400	12	22	370	4	13.61
350	505	28	460	16	22	430	4	20.35
400	565	32	515	18	26	482	4	27.52
450	615	38	565	20	26	532	4	35.11
500	670	38	620	20	26	585	4	40.2

Flanges according to DIN PN16 standard

Size of Nominal Pipe	D	t	C	Holes	h	G	f	Kg
10	90	14	60	4	14	40	2	0.53
15	95	14	65	4	14	45	2	0.58
20	105	16	75	4	14	58	2	0.85
25	115	16	85	4	14	68	2	1.01
32	140	16	100	4	18	78	2	1.46
40	150	16	110	4	18	88	3	1.59
50	165	18	125	4	18	102	3	2.16
65	185	18	145	4	18	122	3	2.65
80	200	20	160	8	18	138	3	3.41
100	220	20	180	8	18	158	3	3.6
125	250	22	210	8	18	188	3	4.96
150	285	22	240	8	22	212	3	5.9
200	340	24	295	12	22	268	3	8.5
250	405	24	355	12	26	320	3	11.64
300	460	28	410	12	26	378	4	14.9
350	520	30	470	16	26	438	4	22.15
400	580	32	525	16	30	490	4	27.87
450	640	34	585	20	30	550	4	34.65
500	715	36	650	20	33	610	4	46.66

Flanges according to DIN PN25 standard

Size of Nominal Pipe	D	t	C	Holes	h	G	f	Kg
10	90	16	60	4	14	40	2	0.62
15	95	16	65	4	14	45	2	0.69
20	105	18	75	4	14	58	2	0.97
25	115	18	85	4	14	68	2	1.16
32	140	18	100	4	18	78	2	1.68
40	150	18	110	4	18	88	3	1.84
50	165	20	125	4	18	102	3	2.45
65	185	22	145	8	18	122	3	3.35
80	200	24	160	8	18	138	3	4.2
100	235	24	190	8	18	162	3	5.07
125	270	26	220	8	18	188	3	6.91
150	300	28	250	8	22	218	3	8.8
200	360	30	310	12	22	278	3	12.4
250	425	32	370	12	26	335	3	17.19
300	485	34	430	16	26	395	4	21.8
350	555	38	490	16	26	450	4	35.17
400	620	40	550	16	30	505	4	44.84
450	670	42	600	20	30	550	4	50.54
500	730	44	660	20	33	615	4	63.65

DIN Standard for Bolts

Bolts and screws are assembly accessories, widely used in manufacturing, mechanics, construction, equipment installation, machinery, tools… in most industries. In particular, the mechanical engineering industry uses the largest number and the most diverse designs of bolts.

In order for the assembly line or connection of parts and details to be accurate and to ensure

safety in production and usage, auxiliary products such as bolts and screws must meet DIN standard.

Some DIN standard for bolts:

DIN 444	Hook bolts (used for attach to parts for hoisting and moving details, parts of machines, etc)
DIN 558	Bolts have threaded design along the body.
DIN 601	Bolts have a partially threaded and partially smooth body.
DIN 603	Bolts with round head, square neck (used in connecting joints)
DIN 604	Flat head bolts.
DIN 912	Countersunk hex bolts.
DIN 931	Bolts have a partially threaded and partially smooth body.
DIN 933	Full body threaded bolts.
DIN 7380	MO hexagon socket countersunk head bolts.

Source: inoxdaiduong.com