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UNI 2281 PN10 Weld Neck Flanges

UNI 2281 PN10 weld neck flange dimensions.

EN 1092-1 focused ASME B16.5 supported PN-rated supply Traceable documents

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EN 1092-1Main product range

ANSI B16.5Class-rated American standard

PED / AD 2000 / UKCACertificate references

Importers & stockistsRepeat supply cooperation

European shipment markets

Flange supply support for European importers and distributors.

Hyupshin supports EN 1092-1, DIN, BS 4504, UNI and project-standard flange inquiries for buyers in United Kingdom, Germany, Hungary, Poland, Czech Republic, Croatia, Italy, Serbia, Slovakia, France, Norway, Portugal, Spain, Netherlands, Austria, Ireland, Albania, Bulgaria, Belgium, Greece.

United KingdomGermanyHungaryPolandCzech RepublicCroatiaItalySerbiaSlovakiaFranceNorwayPortugalSpainNetherlandsAustriaIrelandAlbaniaBulgariaBelgiumGreece

UNI 2281 PN10 Weld Neck Flanges product reference — Product reference **UNI 2281 PN10 Weld Neck Flanges**

Weld neck flanges for European standard projects — Weld neck flanges

Blind flanges for European distributor supply — Blind and project flanges

RFQ preparation

Information that makes European standard flange quotation faster.

Standard

EN 1092-1, ANSI / ASME B16.5, DIN, BS 4504, UNI or project drawing.

Flange details

Type, DN size, PN rating, facing, bore and drawing notes.

Material

Carbon steel, low-temperature steel, stainless steel or project grade.

Documents

EN 10204 3.1, inspection, marking, packing and certificate needs.

Supply notes

UNI 2281 PN10 Weld Neck Flanges for European buyers

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.

RFQ confirmation points

Please confirm standard number, flange type, nominal size, pressure rating, material grade, facing, quantity, certificate requirement and any project drawing before quotation.

Product scope

UNI 2281 PN10 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.

European buyer focus

Order details to confirm before production

Application

Weld Neck flange inquiries are reviewed against piping service, installation position and required facing.

Pressure rating

State PN rating clearly, especially PN10, PN16, PN25 or PN40 for regular European distributor orders.

Material range

Common RFQs include carbon steel, low-temperature steel and stainless steel grades. Attach the project grade when it differs from regular stock items.

Facing and finish

Confirm RF, FF, RTJ, galvanized finish, black paint, anti-rust oil or project-specific surface protection before quotation.

Certificate support

Mention EN 10204 3.1, PED, AD 2000, UKCA, PMI, NDT or third-party inspection requirements in the RFQ.

Packing

For European shipment, state pallet, wooden case, label, marking and mixed-size packing requirements early.

Procurement guidance

UNI 2281 PN10 Weld Neck Flanges quotation notes

Italian standard reference support

UNI 2281 PN10 Weld Neck Flanges buying notes

UNI flange pages support Italian standard references used in distributor stock, maintenance work and regional European projects. Plate flanges under UNI 2276, 2277 and 2278 and weld neck flanges under UNI 2280-2284 should be quoted with the exact UNI number rather than only a general description.

Italian and nearby European buyers often care about dimensional matching, material certificate, finish and repeat availability. The RFQ should include the UNI series, DN size, PN rating, material and whether the flanges are for stock or a named project.

Type confirmation

Weld Neck flange details

For weld neck flanges, the bore, pipe schedule, welding neck dimensions and pressure service should be stated clearly. These details affect machining and inspection, especially when the buyer needs WNRF, WNFF or RTJ execution.

For European buyers, the quotation is stronger when documentation requirements are stated at the beginning: EN 10204 3.1 certificate, PED or AD 2000 references, UKCA notes, third-party inspection, PMI, NDT, marking photos or packing photos. This avoids revising the price after the technical review.

Importer cooperation

How to prepare the RFQ

Hyupshin recommends sending the RFQ as a table when several sizes are involved. Separate each standard, type, pressure rating and material grade into its own line, then add quantity, destination port and required delivery time. This format is easier for European importers, distributors and project suppliers to compare and repeat in future orders.

If the order is urgent, mark which sizes are needed first and whether partial shipment is acceptable. For repeat distributors, previous purchase records or customer part numbers can be added to the message field so the specification can be matched more quickly.

Reference scope

Common order references

Standard / Type	Product	Typical scope
UNI 2281 PN10 weld neck flange	Product type	Dimensions and specification tables below
Documents	Material certificate	EN 10204 3.1 by request
Order control	Drawing / standard edition	Confirm before production

Product data

Dimensions and specification tables

ITALY STANDARD UNI 2281 PN10 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	14	95	14	35	6	30	4	2,5	4	M 12	0,73
21,3	22,5	32	0,73
20	25	26	75	16	105	14	38	6	38	4	2,5	4	M 12	1,03
26,9	28	40	1,03
25	30	31	85	16	115	14	38	6	42	4	2,8	4	M 12	1,24
33,7	34,5	45	1,23
32	38	39	100	16	140	18	40	6	52	6	3	4	M 16	1,82
42,4	43,5	56	1,80
40	44,5	45,5	110	16	150	18	42	7	60	6	3	4	M 16	2,10
48,3	49,5	64	2,08
50	57	58	125	18	165	18	45	8	72	6	3,5	4	M 16	2,81
60,3	61,5	75	2,78
65	76,1	77	145	18	185	18	45	10	90	6	3,5	4	M 16	3,40
80	88,9	90	160	20	200	18	50	10	105	8	3,7	8**	M 16	4,20
100	108	109	180	20	220	18	52	12	125	8	3,7	8	M 16	4,90
114,3	115,5	131	4,75
125	133	134	210	22	250	18	55	12	150	8	4	8	M 16	6,70
139,7	141	156	6,45
150	159	161	240	22	285	22	55	12	175	10	5	8	M 20	8,30
168,3	170,5	184	8,00
175	193,7	195,5	270	24	315	22	60	12	210	10	5	8	M 20	10,3
200	219,1	221	295	24	340	22	62	16	235	10	5	8	M 20	11,4
250	267	269	350	26	395	22	68	16	285	12	5,5	12	M 20	15,6
273	275	292	15,2
300	323,9	326	400	26	445	22	68	16	344	12	6	12	M 20	18,0
350	355,6	357,5	460	26	505	22	68	16	385	12	6,4	16	M 20	24,5
368	370	22,5
400	406,4	408,5	515	26	565	25	72	16	440	12	7	16	M 22	30,2
419	421	27,8
450	457,2	459	565	26	615	25	72	16	478	12	7,3	20	M 22	32,3
500	508	510	620	28	670	25	75	16	542	12	7,3	20	M 22	40,4
600	609,6	611,5	725	28	780	30	80	18	642	12	7,3	20	M 27	50,0
700	711,2	715	840	30	895	30	80	18	745	12	9	24	M 27	66,4
800	812,8	817	950	32	1015	33	90	18	850	12	9	24	M 30	89,3
900	914,4	918	1050	34	1115	33	95	20	950	12	9	28	M 30	104
1000	1016	1020	1160	34	1230	36	95	20	1052	16	9	28	M 33	121
1200	1220	1224	1380	38	1455	39	115	25	1255	16	10	32	M 36 x 3	180
1400	1420	1424	1590	42	1675	42	120	25	1460	16	11	36	M 39 x 3	248
1600	1620	1624	1820	46	1915	48	130	25	1665	16	12	40	M 45 x 3	352
1800	1820	1824	2020	50	2115	48	140	30	1868	16	13	44	M 45 x 3	433
2000	2020	2024	2230	54	2325	48	150	30	2072	16	14	48	M 45 x 3	543
*	The weight is approximate and calculated on base 7.85 Kg/dm3
**	For PN10 the flange should have 4 holes

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

Send this product for quotation

UNI 2281 PN10 Weld Neck Flanges RFQ support

Send the standard, DN size, PN rating, material grade, facing, quantity, certificate requirement and any project drawing. Hyupshin will check the specification before quotation.

Send Inquiry

RFQ preparation

Send standard, type, size, pressure, material and certificate requirements.

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