Facing choices
RF, FF and RTJ facing requirements should be separated in the RFQ because thickness, groove and inspection checks may differ.
B16.5 flange type
ANSI / ASME B16.5 Blind Flanges
B16.5 blind / blank flanges are used for pipeline closures and pressure equipment connections. Facing, class rating and material grade should be confirmed before quotation.
EN 1092-1 focused
ASME B16.5 supported
PN-rated supply
Traceable documents
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.
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.
Focused pages
Related European flange pages
ASME B16.5 Plate Flange
Plate / ring flange RF or FF inquiries for Class 150, 300 and 600 orders.
ASME B16.5 Weld Neck FlangeWNRF, WNFF and RTJ weld neck flange RFQs for pressure piping projects.
ASME B16.5 Slip On FlangeSORF and SOFF slip-on flange references for European buyers ordering American standard flanges.
ASME B16.5 Blind FlangeBlind / blank flange supply with RF, FF or RTJ facing requirements.
ASME B16.5 Class 150 / 300Common Class 150 and Class 300 quotation range.
ASME B16.5 MaterialsASTM A105, A350 LF2, A182 stainless steel and certificate notes.
Supply notes
ANSI / ASME B16.5 Blind Flanges for European buyers
Material and marking
Buyers can request ASTM material marking, heat number traceability and EN 10204 3.1 documentation according to order scope.
European buyer focus
Order details to confirm before production
Blind flange inquiries are reviewed against piping service, installation position and required facing.
State Class 150, 300, 400, 600, 900, 1500 or 2500 with facing and bore details.
Common RFQs include carbon steel, low-temperature steel and stainless steel grades. Attach the project grade when it differs from regular stock items.
Confirm RF, FF, RTJ, galvanized finish, black paint, anti-rust oil or project-specific surface protection before quotation.
Mention EN 10204 3.1, PED, AD 2000, UKCA, PMI, NDT or third-party inspection requirements in the RFQ.
For European shipment, state pallet, wooden case, label, marking and mixed-size packing requirements early.
Procurement guidance
ANSI / ASME B16.5 Blind Flanges quotation notes
ANSI / ASME B16.5 Blind Flanges buying notes
ANSI / ASME B16.5 flanges purchased by European customers should be checked by NPS size, Class rating, flange facing, pipe schedule and bore requirement. These orders often appear in oil, gas, chemical, energy and EPC projects where American standard flanges are purchased together with EN or DIN items.
For Class 150 and Class 300 inquiries, buyers usually focus on fast comparison and clear material options. For Class 600, 900, 1500 and 2500, the RFQ should be treated as a project review with closer attention to facing, wall thickness, pressure service, inspection and certificate wording.
Blind flange details
For blind flanges, facing, thickness, pressure rating and marking are important because the flange is used for closing pipe ends, valves or pressure equipment connections. Certificate and inspection requirements should be listed before production.
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.
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 |
|---|---|---|
| Type | Blind / blank flange | RF / FF / RTJ |
| Class rating | 150 to 2500 | Confirm ASME B16.5 class |
| Material | A105 / LF2 / stainless | By project requirement |
Product data
Dimensions and specification tables
ANSI / ASME B16.5 Class 150 blind flange dimensions
| NPS | OD D mm | Thickness b mm | Raised face g mm | Bolt circle k mm | Holes | Hole dia. l mm | Approx. kg |
|---|---|---|---|---|---|---|---|
| 1/2" | 88.9 | 11.1 | 34.9 | 60.3 | 4 | 15.9 | 0.400 |
| 3/4" | 98.4 | 12.7 | 42.9 | 69.8 | 4 | 15.9 | 0.700 |
| 1" | 107.9 | 14.3 | 50.8 | 79.4 | 4 | 15.9 | 0.900 |
| 1 1/2" | 127.0 | 17.5 | 73.0 | 98.4 | 4 | 15.9 | 1.600 |
| 2" | 152.4 | 19.0 | 92.1 | 120.6 | 4 | 19.0 | 2.600 |
| 3" | 190.5 | 23.8 | 127.0 | 152.4 | 4 | 19.0 | 5.000 |
| 4" | 228.6 | 23.8 | 157.2 | 190.5 | 8 | 19.0 | 7.100 |
| 6" | 279.4 | 25.4 | 215.9 | 241.3 | 8 | 22.2 | 11.800 |
| 8" | 342.9 | 28.6 | 269.9 | 298.4 | 8 | 22.2 | 21.000 |
| 10" | 406.4 | 30.2 | 323.4 | 361.9 | 12 | 25.4 | 30.000 |
| 12" | 482.6 | 31.7 | 381.0 | 431.8 | 12 | 25.4 | 45.000 |
| 16" | 596.9 | 36.5 | 469.9 | 539.9 | 16 | 28.6 | 79.000 |
| 20" | 698.5 | 42.9 | 584.2 | 635.0 | 20 | 31.7 | 124.000 |
| 24" | 812.8 | 47.6 | 692.1 | 749.3 | 20 | 34.9 | 188.000 |
ANSI / ASME B16.5 Class 300 blind flange dimensions
| NPS | OD D mm | Thickness b mm | Raised face g mm | Bolt circle k mm | Holes | Hole dia. l mm | Approx. kg |
|---|---|---|---|---|---|---|---|
| 1/2" | 95.2 | 14.3 | 34.9 | 66.7 | 4 | 15.9 | 0.700 |
| 3/4" | 117.5 | 15.9 | 42.9 | 82.5 | 4 | 19.0 | 1.200 |
| 1" | 123.8 | 17.5 | 50.8 | 88.9 | 4 | 19.0 | 1.500 |
| 1 1/2" | 155.6 | 20.6 | 73.0 | 114.3 | 4 | 22.2 | 2.900 |
| 2" | 165.1 | 22.2 | 92.1 | 127.0 | 8 | 19.0 | 3.400 |
| 3" | 209.5 | 28.6 | 127.0 | 168.3 | 8 | 22.2 | 7.000 |
| 4" | 254.0 | 31.7 | 157.2 | 200.0 | 8 | 22.2 | 11.800 |
| 6" | 317.5 | 36.5 | 215.9 | 269.9 | 12 | 22.2 | 21.300 |
| 8" | 381.0 | 41.3 | 269.9 | 330.2 | 12 | 25.4 | 35.200 |
| 10" | 444.5 | 47.6 | 323.8 | 387.3 | 16 | 28.6 | 57.000 |
| 12" | 520.7 | 50.8 | 381.0 | 450.8 | 16 | 31.7 | 82.000 |
| 16" | 647.7 | 57.1 | 469.9 | 571.5 | 20 | 34.9 | 140.000 |
| 20" | 774.7 | 63.5 | 584.2 | 685.8 | 24 | 34.9 | 223.000 |
| 24" | 914.4 | 69.8 | 692.1 | 812.8 | 24 | 41.3 | 345.000 |
ANSI / ASME B16.5 Class 600 blind flange dimensions
| NPS | OD D mm | Thickness b mm | Raised face g mm | Bolt circle k mm | Holes | Hole dia. l mm | Approx. kg |
|---|---|---|---|---|---|---|---|
| 1/2" | 95.2 | 14.3 | 34.9 | 66.7 | 4 | 15.9 | 0.700 |
| 3/4" | 117.5 | 15.9 | 42.9 | 82.5 | 4 | 19.0 | 1.200 |
| 1" | 123.8 | 17.5 | 50.8 | 88.9 | 4 | 19.0 | 1.500 |
| 1 1/2" | 155.6 | 22.2 | 73.0 | 114.3 | 4 | 22.2 | 3.200 |
| 2" | 165.1 | 25.4 | 92.1 | 127.0 | 8 | 19.0 | 4.300 |
| 3" | 209.5 | 31.7 | 127.0 | 168.3 | 8 | 22.2 | 8.000 |
| 4" | 273.0 | 38.1 | 157.2 | 215.9 | 8 | 25.4 | 18.000 |
| 6" | 355.6 | 47.6 | 215.9 | 292.1 | 12 | 28.6 | 35.500 |
| 8" | 419.1 | 55.6 | 269.9 | 349.2 | 12 | 31.7 | 58.000 |
| 10" | 508.0 | 63.5 | 323.8 | 431.8 | 16 | 34.9 | 98.000 |
| 12" | 558.8 | 66.7 | 381.0 | 488.9 | 20 | 34.9 | 125.000 |
| 16" | 685.8 | 76.2 | 469.9 | 603.2 | 20 | 41.3 | 215.000 |
| 20" | 812.8 | 88.9 | 584.2 | 723.9 | 24 | 44.4 | 366.000 |
| 24" | 939.8 | 101.6 | 692.1 | 838.2 | 24 | 50.8 | 532.000 |
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
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ANSI / ASME B16.5 Blind 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.
RFQ preparation
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