UNI detail

UNI 2283 PN25 Weld Neck Flanges

UNI 2283 PN25 weld neck flange dimensions.

UNI DN size range PN-rated supply Traceable documents

Send Inquiry Certificates

Back to UNI flanges

Reference scope

Common order references

Standard / Type	Product	Typical scope
UNI 2283 PN25 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 2283 PN25 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	280	28	330	25	75	15	218	10	5	12	M 22	13,6
200	219,1	221	310	30	360	25	80	16	244	10	5	12	M 22	16,8
250	267	269	370	32	425	30	88	18	292	12	5,5	12	M 27	23,8
273	275	298	23,3
300	323,9	326	430	34	485	30	92	18	352	12	6	16	M 27	30,5
350	355,6	357,5	490	38	555	33	100	20	398	12	6,4	16	M 30	47,6
368	370	44,5
400	406,4	408,5	550	40	620	36	110	20	452	12	7,3	16	M 33	62,1
419	421	58,3
450	457,2	459	600	40	670	36	115	20	492	12	8	20	M 33	67,8
500	508	510	660	44	730	36	125	20	558	12	8	20	M 33	88,8
600	609,6	611,5	770	46	845	39	125	20	660	12	8	20	M 36 x 3	114
700	711,2	715	875	46	960	42	125	20	760	12	10	24	M 39 x 3	138
800	812,8	817	990	50	1085	48	135	22	865	12	11	24	M 45 x 3	185
900	914,4	918	1090	54	1185	48	145	24	968	12	12	28	M 45 x 3	224
1000	1016	1020	1210	58	1320	56	155	24	1070	16	13	28	M 52 x 3	293
*	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 2283 PN25 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

PN25

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.

Send this product for quotation

Request a quotation for this flange

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

Send Inquiry