7. DIN flange standard

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DIN 2545 Slip-On Flanges

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Description

Slip-On Flanges to DIN 2545 are flanges designed to slip over the end of a pipe and are then welded on both the inside and outside to create a tight connection. This type of flange is commonly used in low to medium pressure piping systems.

Applications

Slip-On Flanges are widely used in industries such as:

Oil and gas industry: Used in oil and natural gas pipeline systems.
Chemical industry: Used in chemical and solution pipeline systems.
Energy industry: Used in piping systems in power plants.
Water supply and drainage industry: Applications in plumbing systems, wastewater treatment.
Food and beverage industry: Used in piping systems requiring high hygiene standards.

Standards

Slip-On Flanges to DIN 2545 are a popular choice in many industries due to their flexibility and good pressure resistance.

Material: Carbon steel, stainless steel, steel alloy.
Size: According to DIN 2545 standard, from DN 15 to DN 1200.
Pressure: Usually withstands pressure from PN 2.5 to PN 40.
Surface: Can be flat (FF), raised (RF), or other surface type upon request.

Slip-On flange dimensions and thickness table according to DIN 2545 standard

NPS (inches)	DN (mm)	Outside diameter OD (mm)	BC bolt hole diameter (mm)	Center hole diameter (mm)	Number of bolt holes	Bolt hole diameter (mm)	Flange thickness T (mm)	Welding neck thickness t (mm)
1/2	15	90	60	21.3	4	15	11	14
3/4	20	100	70	26.7	4	15	12	16
1	25	110	79	33.4	4	15	12	18
1 1/4	32	115	89	42.2	4	15	13	18
1 1/2	40	125	98	48.3	4	15	14	18
2	50	150	120	60.3	4	19	16	20
2 1/2	65	180	140	73	4	19	18	22
3	80	190	150	88.9	4	19	19	24
4	100	230	191	114.3	8	19	24	24
5	125	255	216	141.3	8	22	24	26
6	150	280	241	168.3	8	22	26	28
8	200	345	298	219.1	8	22	29	30
10	250	405	362	273	12	25	32	32
12	300	485	432	323.9	12	25	35	34
14	350	535	476	355.6	12	29	38	38
16	400	595	540	406.4	16	29	41	40
18	450	635	578	457	16	32	43	42
20	500	700	635	508	20	32	45	44
24	600	815	749	610	20	36	50	48

Summary table of commonly used materials for Slip-On flanges according to DIN 2545 standard

Material Type	Describe	Application
Carbon steel	High carbon steel	Piping system, medium pressure
Stainless Steel	Steel alloy containing at least 10.5% Chromium	Chemical, food, pharmaceutical industry
Alloy steel	Steel with alloying elements such as Cr, Mo	Applications requiring high strength, high temperature
Galvanized steel	Zinc coated carbon steel	Outdoor, anti-corrosion piping system
Aluminum alloy	Aluminum combined with other metals	Piping systems in light industry
Copper	Yellow metal has good electrical and thermal conductivity.	Piping systems in the electrical and water industry
Copper-Nickel Alloy	Copper combined with nickel	Marine piping system, salt water corrosion protection