Stainless Steel Welding Neck Flange DN250 PN16 AISI316

Stainless Steel Welding Neck Flange DN250 PN16 AISI316

It is an industrial fastener that is used to connect or join two pipes. It is in the shape of a round disc. There are bolt holes on the edges. In the middle, the diameter of the pipe has a 1-2 mm diameter hole. Their thickness increases according to the pressure. The pressure class is called PN. PN = Nominal pressure. As the amount of pressure increases such as PN6, PN10, PN25, PN40, PN also increases. Its dimensions are stated in DN according to pipe diameters. It continues as DN10, DN15, DN20, DN32, DN40.

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The main flange types are as follows

1. Stainless Steel Slip-On Flange; It is a connecting element used to connect or join two pipes together. There is a gasket step surface on one side of the flanges. While two flanges are connected to each other, gaskets are placed in between with bolts.
2. Stainless Steel Welding Neck Flange; Since the end of the flange to be welded is a bit long, that is, it is like a neck, it is called a necked flange. The installation continues by welding to the end of the pipe length.
3. Stainless Steel Blind Flange; as the name suggests, is a fitting derivative used to blind the pipe in the installation. There are side bolt holes. The inner hole part is closed.
4. Stainless Steel Loose Flange; is the flange used with the collar. It is called a loose flange because it moves freely around the stainless collar. This time the flange will be welded to the collar, not to the pipe. The Stainless Loose Flange is generally used in places that can be easily removed and installed.
5. Stainless Steel Screved Flange; It is a flange with a thread inside the flange. It is used to convert the gear to the installation or to the system from the gear.
6. Stainless Steel  ANSI Norm Flange; It is the American norm flange. Pressure class indicated as 150lb, 300lb.
7. Stainless Steel Pressed Loose Flange; It is used in areas with low pressure. It is manufactured from 3 mm sheet metal by pressing in a press.
8. Stainless Steel Spectacle Flange; It is a connection derivative placed between two flanges. It functions as a valve in the piping. The system is opened and closed by sliding left and right between the two flanges like the slide on itself.
9. Stainless Steel JIS Norm Flange; It is the Japanese Norm Flange and published by the Japanese Standards Association (JSA). The JIS Norm is like a standard flange. Gasket pressing surface is drowned directly on the base.
The pressure class is 5K and 10K. As the pressure increases, both the thickness increases, and the pressure class such as 20K and 40K increases. Like other Flanges, there are Slip-on, Welding Neck, Blind, Loose, and Pressed Loose Flange derivatives.

Quality standards are available in the market as AISI 304 / 304L, AISI 316 / 316L, EN1.4307, EN 1.4404. Usage Areas are used in pipelines, liquid, gas, and solid-fluid lines. In corrosive environments, places requiring hygiene or decorative purposes, mainly stainless fittings are used. In colloquial language, chrome flanges are also called plumbing materials. It is a fitting element used in heavy industries and areas with high pressure.

DIN 2501 PN10 Gasket Pressure Flange
INCH	DN	QD	QK	PIPE	Qd1	Qd4	d2xn	b	f
3/8''	10	90	60	17,2	17,7	40	Q14X4	14	2
1/2"	15	95	65	21,3	22	45	Q14X4	14	2
3/4"	20	105	75	26,9	27,6	58	Q14X4	16	2
1"	25	115	85	33,7	34,4	68	Q14X4	16	2
11/4"	32	140	100	42,4	43,1	78	Q18X4	16	2
11/2"	40	150	110	48,3	49	88	Q18X4	16	3
2"	50	165	125	60,3	61,1	102	Q18X4	18	3
21/2"	65	185	145	76,1	77,1	122	Q18X4	18	3
3"	80	200	160	88,9	90,3	138	Q18X8	20	3
4"	100	220	180	114,3	115,9	158	Q18X8	20	3
5"	125	250	210	139,7	141,6	188	Q18X8	22	3
6"	150	285	240	168,3	170,5	212	Q22X8	22	3
7"	175	315	270	193,7	196,1	242	Q22X8	24	3
8"	200	340	295	219,1	221,8	268	Q22X12	24	3
10"	250	395	350	273	276,2	320	Q22X12	26	3
12"	300	445	400	323,9	327,6	370	Q22X12	26	4
14"	350	505	460	355,6	359,7	430	Q22X16	26	4
16"	400	565	515	406,4	411	482	Q22X16	26	4
18"	450	615	565	457,2	462	532	Q26X20	28	4
20"	500	670	620	508	513,6	585	Q26X20	28	4
24"	600	780	725	610	615	685	Q30X20	28	5
28"	700	895	840	711	716	800	Q30X24	30	5
32"	800	1015	950	813	818	905	Q33X24	32	5
36"	900	1115	1050	914	919	1005	Q33X28	34	5
40"	1000	1230	1160	1016	1021	1110	Q36X28	34	5