01 · product title
Product Overview
Product standard, flange type and RFQ checklist for purchasing reference.
UNI Flanges
UNI 2283 PN25 WELDING NECK FLANGE
Shandong Hyupshin Flanges Co., Ltd supplies UNI 2283 PN25 WELDING NECK Flange, with dimensions, materials, certificates and export support for industrial piping projects.
02 · images & drawings
Product Images & Drawings
Product photos, drawings and specification images for purchasing reference.
03 · dimensions
Dimensions & Technical Tables
Dimension tables and specification drawings for purchasing review.
UNI 2283 PN25
| 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 | |||||||||||||
04 · production & purchase
Production Capacity & Purchase Details
Supply range, materials, order details and export documents for quotation review.
Supply RangeAvailable supply range: standard sizes and project-specific sizes according to the selected flange standard or drawing. Confirm flange type, pressure rating, facing, drilling and tolerance requirements before quotation.
Material GradesCommon material grades include carbon steel such as ASTM A105, A350 LF2, A181, A36, Q235B and equivalent carbon steel grades when applicable, and stainless steel such as ASTM A182 F304, F304L, F316, F316L, F321 and equivalent stainless steel grades when required. Final material selection should follow the applicable standard and project specification.
Surface ProtectionSurface protection can include anti-rust oil, black paint, yellow paint, hot-dip galvanizing, electro galvanizing or customer-specified coating. Coating requirements should be confirmed together with packing and destination details.
Inspection & DocumentsInspection and document support can include mill certificate, EN 10204 3.1 material certificate, dimensional inspection and third-party inspection when required. Heat number traceability and order records can be prepared for export review when required.
Packing & DeliveryExport packing can be arranged with plywood cases, pallets or customer-specified packing. Delivery terms may include FOB, CFR, CIF, EXW or other agreed trade terms based on destination and shipment requirements.
RFQ InformationTypical MOQ reference: MOQ can be reviewed by size, material grade and production schedule. Send standard, flange type, size, pressure/rating, material grade, facing, quantity, coating, certificate scope and destination port. Payment terms may include T/T, irrevocable L/C at sight or agreed payment terms for approved orders.
05 · inquiry
RFQ Support
Send standard, size, pressure, material, quantity and drawings for quotation review.
Inquiry support
Open Inquiry Form
Send your flange inquiry directly to Hyupshin
Share product standard, size, pressure, material, quantity and drawings. We will reply with export quotation details.
06 · certificates
Certificates
Certificate support for supplier qualification and project documentation.
