DIN 2631 PN 6 WELD NECK FLANGES

DIN 2631 PN 6 Weld Neck Flanges | #DIN 2631 Sch 40 Weld Neck Flange | #DIN 2631 PN 6 WNRF Flange | WNFF DIN 2631 | DIN 2631 PN 6 Weldneck Flange | DIN Weldneck Flange | #DIN 2631 PN 6 Weldneck Dimensions | DIN 2631 PN 6 weldneck flange schedule chart

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DIN 2631 PN 6 Weld Neck Flanges are generally used in high pressure applications, where hot or cold temperatures exist. These steel DIN 2631 weld neck flanges are circumferentially welded into the system at its neck which means that the integrity of the butt welded area can be easily examined by radiography. These PN 6 weld neck flanges reduce the turbulence and erosion inside the pipeline because the bores of both pipe and flange match. This also reduces high stress concentration at the base of the hub of the PN weld neck pipe flange. Such weld neck are favoured in critical applications. The inside diameter of a PN 6 weld neck flange is machined to match the inside diameter of the pipe. Tesco Steel & Engineering manufacture a wide range of high quality DIN 2631 PN 6 Weld Neck Flanges in India.

DIN 2631 PN6 WELD NECK FLANGE Dimensions

Germany standard flange DIN 2631 welding neck flanges; nominal pressure 6

Pipe			Flange				Neck				Raised face		Screws			Weight
Pipe			Flange				Neck				Raised face		Screws			(7,85 Kg/dm3)
Rated	d1		D	b	k	h1	d3	s	r	h2	d4	f	Holes	Thread	d2	Kg
Diameter	ISO Series	DIN Series	D	b	k	h1	d3	s	r	h2	d4	f	Holes	Thread	d2	Kg
15	-	20	80	12	55	30	28	2	4	6	40	2	4	M 10	11	0,392
15	21,3	-	80	12	55	30	30	2	4	6	40	2	4	M 10	11	0,392
20	-	25	90	14	65	32	35	2,3	4	6	50	2	4	M 10	11	0,592
20	26,9	-	90	14	65	32	38	2,3	4	6	50	2	4	M 10	11	0,592
25	-	30	100	14	75	35	40	2,6	4	6	60	2	4	M 10	11	0,747
25	33,7	-	100	14	75	35	42	2,6	4	6	60	2	4	M 10	11	0,747
32	-	38	120	14	90	35	50	2,6	6	6	70	2	4	M 12	14	1,05
32	42,4	-	120	14	90	35	55	2,6	6	6	70	2	4	M 12	14	1,05
40	-	44,5	130	14	100	38	58	2,6	6	7	80	3	4	M 12	14	1,18
40	48,3	-	130	14	100	38	62	2,6	6	7	80	3	4	M 12	14	1,18
50	-	57	140	14	110	38	70	2,9	6	8	90	3	4	M 12	14	1,34
50	60,3	-	140	14	110	38	74	2,9	6	8	90	3	4	M 12	14	1,34
65	76,1	-	160	14	130	38	88	2,9	6	9	110	3	4	M 12	14	1,67
80	88,9	-	190	16	150	42	102	3,2	8	10	128	3	4	M 16	18	2,71
100	-	108	210	16	170	45	122	3,6	8	10	148	3	4	M 16	18	3,24
100	114,3		210	16	170	45	130	3,6	8	10	148	3	4	M 16	18	3,24
125	-	133	240	18	200	48	148	4	8	10	178	3	8	M 16	18	4,49
125	139,7	-	240	18	200	48	155	4	8	10	178	3	8	M 16	18	4,49
150	-	159	265	18	225	48	172	4,5	10	12	202	3	8	M 16	18	5,15
150	168,3	-	265	18	225	48	184	4,5	10	12	202	3	8	M 16	18	5,15
200	219,1	-	320	20	280	55	236	5,9	10	15	258	3	8	M 16	18	7,78
250	-	267	375	22	335	60	282	6,3	12	15	312	3	12	M 16	18	10,8
250	273	-	375	22	335	60	290	6,3	12	15	312	3	12	M 16	18	10,8
300	323,9	-	440	22	395	62	342	7,1	15	15	365	4	12	M 20	22	14
350	355,6	-	490	22	445	62	385	7,1	12	15	415	4	12	M 20	22	18,5
350	-	368	490	22	445	62	385	7,1	12	15	415	4	12	M 20	22	16,7
400	406,4	-	540	22	495	65	438	7,1	12	15	465	4	16	M 20	22	21,2
400	-	419	540	22	495	65	438	7,1	12	15	465	4	16	M 20	22	19
500	508	-	645	24	600	68	538	7,1	12	15	570	4	20	M 20	22	28,6
600	610	-	755	24	705	70	640	7,1	12	16	670	5	20	M 24	26	31,5
700	711	-	860	24	810	70	740	7,1	12	16	775	5	24	M 24	26	37,4
800	813	-	975	24	920	70	842	7,1	12	16	880	5	24	M 27	30	46,1
900	914	-	1075	26	1020	70	942	7,1	12	16	980	5	24	M 27	30	55,6
1000	1016	-	1175	26	1120	70	1045	7,1	16	16	1080	5	28	M 27	30	61,9

Diameters & Drilling of DIN Flanges (mm)

Flange Nominal Diameter	Pressure Rating (PN)
**Nominal BSP Pipe Size	PN6	PN10	PN16	PN25	PN40
DN 10	75	90	90	90	90	O.D.
3/8"	50	60	60	60	60	PCD (bolt circle)
	4 x 11	4 x 14	4 x 14	4 x 14	4 x 14	# of holes x diam. of holes
DN 15	80	95	95	95	95	O.D.
1/2"	55	65	65	65	65	PCD (bolt circle)
	4 x 11	4 x 14	4 x 14	4 x 14	4 x 14	# of holes x diam. of holes
DN 20	90	105	105	105	105	O.D.
3/4"	65	75	75	75	75	PCD (bolt circle)
	4 x 11	4 x 14	4 x 14	4 x 14	4 x 14	# of holes x diam. of holes
DN 25	100	115	115	115	115	O.D.
1"	75	85	85	85	85	PCD (bolt circle)
	4 x 11	4 x 14	4 x 14	4 x 14	4 x 14	# of holes x diam. of holes
DN 32	120	140	140	140	140	O.D.
1 1/4"	90	100	100	100	100	PCD (bolt circle)
	4 x 14	4 x 18	4 x 18	4 x 18	4 x 18	# of holes x diam. of holes
DN 40	130	150	150	150	150	O.D.
1 1/2"	100	110	110	110	110	PCD (bolt circle)
	4 x 14	4 x 18	4 x 18	4 x 18	4 x 18	# of holes x diam. of holes
DN 50	140	165	165	165	165	O.D.
2"	110	125	125	125	125	PCD (bolt circle)
	4 x 14	4 x 18	4 x 18	4 x 18	4 x 18	# of holes x diam. of holes
DN 65	160	185	185	185	185	O.D.
2 1/2"	130	145	145	145	145	PCD (bolt circle)
	4 x 14	4 x 18	4 x 18	8 x 18	8 x 18	# of holes x diam. of holes
DN 80	190	200	200	200	200	O.D.
3"	150	160	160	160	160	PCD (bolt circle)
	4 x 18	8 x 18	8 x 18	8 x 18	8 x 18	# of holes x diam. of holes
DN 100	210	220	220	235	235	O.D.
4"	170	180	180	190	190	PCD (bolt circle)
	4 x 18	8 x 18	8 x 18	8 x 22	8 x 22	# of holes x diam. of holes
DN 125	240	250	250	270	270	O.D.
5"	200	210	210	220	220	PCD (bolt circle)
	8 x 18	8 x 18	8 x 18	8 x 26	8 x 26	# of holes x diam. of holes
DN 150	265	285	285	300	300	O.D.
6"	225	240	240	250	250	PCD (bolt circle)
	8 x 18	8 x 22	8 x 22	8 x 26	8 x 26	# of holes x diam. of holes
DN 175		315	315	330	350	O.D.
7"		270	270	280	295	PCD (bolt circle)
		8 x 22	8 x 22	12 x 26	12 x 30	# of holes x diam. of holes
DN 200	320	340	340	360	375	O.D.
8"	280	295	295	310	320	PCD (bolt circle)
	8 x 18	8 x 22	12 x 22	12 x 26	12 x 30	# of holes x diam. of holes
DN 250	375	395	405	425	450	O.D.
10"	335	350	355	370	385	PCD (bolt circle)
	12 x 18	12 x 22	12 x 26	12 x 30	12 x 33	# of holes x diam. of holes
DN 300	440	445	460	485	515	O.D.
12"	395	400	410	430	450	PCD (bolt circle)
	12 x 22	12 x 22	12 x 26	16 x 30	16 x 33	# of holes x diam. of holes
DN 350	490	505	520	555	580	O.D.
14"	445	460	470	490	510	PCD (bolt circle)
	12 x 22	16 x 22	16 x 26	16 x 33	16 x 36	# of holes x diam. of holes
DN 400	540	565	580	620	660	O.D.
16"	495	515	525	550	585	PCD (bolt circle)
	16 x 22	16 x 26	16 x 30	16 x 36	16 x 39	# of holes x diam. of holes
DN 500	645	670	715	730	755	O.D.
20"	600	620	650	660	670	PCD (bolt circle)
	20 x 22	20 x 26	20 x 33	20 x 36	20 x 42	# of holes x diam. of holes
DN 600	755	780	840	845		O.D.
24"	705	725	770	770		PCD (bolt circle)
	20 x 24	20 x 27	20 x 33	20 x 36		# of holes x diam. of holes

O.D. = outside diameter PCD = bolt circle diameter PN = nominal pressure in bars
Note: (1 bar = 14.5 psi = 0.1 MPa = 100 KPa = 1.02 Kgf/cm²)

Advantages of using DIN 2631 PN 6 Weldneck Flanges

Weldneck flanges offer several advantages over other types of flanges, such as slip-on flanges. Here are some of the benefits of using weldneck flanges:

Superior Strength
Weldneck flanges have a long tapered hub that provides additional strength to the connection between the pipe and the flange. The welding process creates a permanent and durable bond that can withstand high pressure and extreme temperatures.

Versatility in Accommodating Different Pipe Sizes
Weldneck flanges are available in various sizes, making them suitable for use with pipes of different diameters. The flanges can also be used with pipes of different materials, such as stainless steel, carbon steel, and alloy steel.

Secure and Leak-Free Connection
The welding process creates a strong and leak-free connection between the pipe and the flange. This ensures that the piping system is safe and efficient, reducing the risk of leaks and other safety hazards.

Easy to Install and Maintain
Weldneck flanges are relatively easy to install, and the welding process can be completed quickly. The flanges are also easy to maintain, requiring only periodic inspection and maintenance to ensure that they are in good working condition.

Applications of DIN 2631 PN 6 Weldneck Flange

Weldneck flanges are used in various industrial piping applications, including:

Oil and Gas Industry
Weldneck flanges are commonly used in oil and gas piping systems, where they are used to transport crude oil, natural gas, and other petroleum products.

Chemical Processing Industry
Weldneck flanges are used in chemical processing plants to transport various chemicals and materials.

Water Treatment Industry
Weldneck flanges are used in water treatment plants to transport water and other fluids.

Power Generation Industry
Weldneck flanges are used in power generation plants to transport steam, gas, and other fluids.

Price List of Weldneck Flanges

Prices for DIN 2631 PN 6 Weldneck Flanges are very affordable.

Please click on the "Ask for Quote" button or click here to request the updated price list and ready stock information along with your requirement.
TESCO STEEL & ENGINEERING maintains a stock of all standard items and can export them at the best price.

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