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UNI 2284 PN40 Weld Neck Flanges

UNI 2284 PN40 weld neck flange dimensions.

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Reference scope

Common order references

Standard / Type	Product	Typical scope
UNI 2284 PN40 weld neck flange	Product type	Dimensions and specification tables below
Documents	Material certificate	EN 10204 3.1 by request
Production release	Approved drawing / standard edition	Released against the controlled order file

Product data

Dimensions and specification tables

ITALY STANDARD UNI 2284 PN40 WELDING NECK FLANGE RF DIMENSIONS TABLE

Directions for the designation	d1	a	b	D	f	h	h1	m	r	s	Holes	Screws	Weight*
Rated Diameter	External diameter of the pipe	Kg
15	20	21	65	16	95	14	38	6	30	4	2,5	4	M 12	0,83
21,3	22,5	32	0,83
20	25	26	75	18	105	14	40	6	38	4	2,5	4	M 12	1,15
26,9	28	40	1,15
25	30	31	85	18	115	14	40	6	42	4	2,8	4	M 12	1,39
33,7	34,5	46	1,38
32	38	39	100	18	140	18	42	6	52	6	3	4	M 16	2,03
42,4	43,5	56	2,01
40	44,5	45,5	110	18	150	18	45	7	60	6	3	4	M 16	2,35
48,3	49,5	64	2,33
50	57	58	125	20	165	18	48	8	72	6	3,5	4	M 16	3,11
60,3	61,5	75	3.08
65	76,1	77	145	22	185	18	52	10	90	6	3,5	8	M 16	3,95
80	88,9	90	160	24	200	18	58	12	105	8	3,7	8	M 16	4,98
100	108	109	190	24	235	22	65	12	128	8	3,7	8	M 20	6,85
114,3	115,5	134	6,70
125	133	134	220	26	270	25	68	12	155	8	4	8	M 22	9,42
139,7	141	162	9,20
150	159	161	250	28	300	25	75	12	182	10	5	8	M 22	12,4
168,3	170,5	192	12,0
175	193,7	195,5	295	32	350	30	82	15	218	10	5,5	12	M 27	17,6
200	219,1	221	320	34	375	30	88	16	244	12	5,5	12	M 27	20,8
250	267	269	385	38	450	33	105	18	298	12	6,5	12	M 30	34,3
273	275	306	33,8
300	323,9	326	450	42	515	33	115	18	362	12	7,3	16	M 30	47,4
350	355,6	357,5	510	46	580	36	125	20	408	12	8	16	M 33	69,0
368	370	65,0
400	406,4	408,5	585	50	660	39	135	20	462	12	9	16	M 36 x 3	96,5
419	421	91,6
450	457,2	459	610	50	685	39	135	20	500	12	9	20	M 36 x 3	91,6
500	508	510	670	52	755	42	140	20	562	12	10	20	M 39 x 3	117
*	The weight is approximate and calculated on base 7.85 Kg/dm3

Use these tables for RFQ preparation. Final production should be confirmed against the required standard edition, drawing, material grade and certificate requirement.

Supply notes

Supply and order notes

Specification support from Hyupshin

Use the dimensions and RFQ notes below to check the required standard, size range, pressure rating, material grade and certificate needs before sending an inquiry.

How we prepare the production item

Our quotation records the standard number, flange type, nominal size, pressure rating, material grade, facing, quantity and document scope, with project drawings linked to the same production item.

Product scope

UNI 2284 PN40 weld neck flange can be quoted in carbon steel, stainless steel or project material grades when the order specification, dimensions and certificate requirements are confirmed.

Technical purchasing support

How Hyupshin turns the specification into a controlled flange order.

Dimension control

UNI production dimensions

Our technical team compares the requested standard edition and project drawing, then releases the applicable dimensions to production.

Pressure and facing

PN40

We record the PN rating, sealing-face form, surface finish and tolerance notes on each PN-rated quotation line.

Product geometry

Weld Neck manufacturing details

Flange type, sealing face, drilling, thickness and machining details are checked together so production and inspection use the same specification.

Documents

Certificate and inspection records

Our order file carries the agreed EN 10204 3.1, PED, AD 2000, UKCA, PMI, NDT and third-party inspection scope through to shipment.

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Request a quotation for this flange

Send the standard, flange type, DN, PN, sealing face, material grade, quantity, certificate requirement and any project drawing.

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