ASTM A182 F11 Flanges Quick Overview
Mortec At A Glance
Established
Since 2012 • 15+ yrs experience
Manufacturing Units
2 in-house units • Taloja & Mazgaon
Stockyard Area
8,850+ sq.ft • Ready-stock inventory
Certifications
ISO 9001:2015, PED • GST, IEC & MSME
Clientele
100+ clients • India & export markets
Export Reach
15+ countries • GCC, Africa & APAC
Testing Offered
Tensile, hardness & PMI • MTC EN 10204 3.1
Shipment Documents
Invoice, Packing List • COO, COI, MTC, BL & Lab Report
Table of Content
Genuine SA182 Grade F11 Class 2 WNRF Flanges Manufacturer in India, Refer Specification
Production begins with certified F11 steel blanks, carefully identified by heat number. Every blank starts as heat-numbered 1.25Cr-0.5Mo bar cut on our own saw in Mumbai. As an established ASTM A182 F11 Flanges Manufacturer in India we upset and die-forge that bar close to net shape, then bring it down below 538°C before any furnace work begins. Chromium at 1.00 to 1.50 percent and molybdenum at 0.44 to 0.65 percent are what hold strength once the line runs hot, and they only behave if the heat treatment behind them is honest.
Flanges going into ASME B16.5 or B16.47 service leave here normalised and tempered, austenitised from 900°C minimum, air cooled, then tempered above 620°C against a recorded chart. Machining follows ASME B16.5 from ½″ through 24″, with B16.47 Series A and B or MSS SP-44 taking over above that. RF, FF and RTJ faces are cut in-house, Class 150 through 2500, in Class 1, Class 2 and Class 3 material. Racked references clear the works in three to five working days with PMI results and EN 10204 3.1 or 3.2 certificates already in the file.
ASTM A182 F11 Flanges Specification
Sourced directly from the forge, each order includes original heat-wise certificates for traceability.
SA182 Grade F11 Class 2 Flange Dimensional Standards
- ASME B16.5 • ASME B16.47 Series A & B
- MSS SP-44 large diameter
- ASME B16.36 orifice • B16.48 line blanks
SA182 Grade F11 Class 2 WNRF Flanges Design Codes
- ASME B31.1 power piping
- ASME B31.3 process piping
- ASME B16.5 Material Group 1.9 rating tables
ASTM A182 F11 Blind Flange Weld Grouping
- ASME Section IX P-No. 4, Group 1
- Shares the group with A335 P11 and A234 WP11
ASTM A182 F11 Slip On Flange Quality Systems
- ISO 9001:2015 certified works
- PED 2014/68/EU file raised when the order calls for it
SA 182 Gr F11 Socket Weld Flange Inspection
- SGS, BV, TUV, Lloyd’s Register, IRS
- Your own inspector is welcome at release
A182 Gr F11 Threaded Flange Sour Service Route
- NACE MR0175 / ISO 15156 Part 2 compliance offered
- Hardness recorded per piece against the agreed ceiling
A182 F11 Plate Flange Matching Grade 11 Family
- ASTM A335 P11 pipe • A234 WP11 fittings
- ASTM A213 T11 tube • A387 Grade 11 plate
UNS K11572 Long Weld Neck Flange Order Flexibility
- Single spares through to full container lots
- Special bores and off-standard drilling to print
ASTM A182 F11 Flanges Manufacturer in Mumbai - Running Since 2012
Tell us the NPS, class and facing, and the rack position comes back with the rate.
SA182 Grade F11 Class 2 WNRF Flanges Sizes
The ASTM A182 F11 Flanges Exporter offers standard sizes for diverse piping requirements.
ASTM A182 F11 Flange Size Coverage
Fix The Bore Before You Fix The Size
A weld neck bored for SCH 40 will not sit square against a SCH 80 pipe end, and on a hot chrome-moly header that step becomes a stress raiser rather than a fitting nuisance. Send the line list or the isometric across, we mark up bore, hub and facing against the class you have chosen, and a firm ex-Mumbai figure comes back before the day closes.
Check Size AvailabilityASTM A182 F11 Blind Flanges Dimensions
Grade F11 changes the metallurgy, not the dimensions; sizes and classes follow ASME B16.5 or B16.47.
| Nominal Pipe Size (NPS) | Outside Diameter Of Flange | Thickness Of Flange | Hub At Base Diameter | Diameter Of Raised Face | Bolt Circle Diameter | No. Of Bolts |
|---|---|---|---|---|---|---|
| O | Q | X | R | W | n | |
| 1/2 | 3-1/2 | 7/16 | 1-3/16 | 1-3/8 | 2-3/8 | 4 |
| 3/4 | 3-7/8 | 1/2 | 1-1/2 | 1-11/16 | 2-3/4 | 4 |
| 1 | 4-1/4 | 9/16 | 1-15/16 | 2 | 3-1/8 | 4 |
| 1-1/4 | 4-5/8 | 5/8 | 2-5/16 | 2-1/2 | 3-1/2 | 4 |
| 1-1/2 | 5 | 11/16 | 2-9/16 | 2-7/8 | 3-7/8 | 4 |
| 2 | 6 | 3/4 | 3-1/16 | 3-5/8 | 4-3/4 | 4 |
| 2-1/2 | 7 | 7/8 | 3-9/16 | 4-1/8 | 5-1/2 | 4 |
| 3 | 7-1/2 | 15/16 | 4-1/4 | 5 | 6 | 4 |
| 3-1/2 | 8-1/2 | 15/16 | 4-13/16 | 5-1/2 | 7 | 8 |
| 4 | 9 | 15/16 | 5-5/16 | 6-3/16 | 7-1/2 | 8 |
| 5 | 10 | 15/16 | 6-7/16 | 7-5/16 | 8-1/2 | 8 |
| 6 | 11 | 1 | 7-9/16 | 8-1/2 | 9-1/2 | 8 |
| 8 | 13-1/2 | 1-1/8 | 9-11/16 | 10-5/8 | 11-3/4 | 8 |
| 10 | 16 | 1-3/16 | 12 | 12-3/4 | 14-1/4 | 12 |
| 12 | 19 | 1-1/4 | 14-3/8 | 15 | 17 | 12 |
| 14 | 21 | 1-3/8 | 15-3/4 | 16-1/4 | 18-3/4 | 12 |
| 16 | 23-1/2 | 1-7/16 | 18 | 18-1/2 | 21-1/4 | 16 |
| 18 | 25 | 1-9/16 | 19-7/8 | 21 | 22-3/4 | 16 |
| 20 | 27-1/2 | 1-11/16 | 22 | 23 | 25 | 20 |
| 24 | 32 | 1-7/8 | 26-1/8 | 27-1/4 | 29-1/2 | 20 |
Full Data Sheets On Request
Each pattern and class carries its own hub profile, bore, length through hub and face height, so rather than crowd them onto one page we issue the complete sheet as PDF or Excel for the exact class and facing you call out, taken from whichever of ASME B16.5 or B16.47 governs that size.
Request Dimension ChartTolerance & Drilling Notes
Most Popular Types Of ASTM A182 F11 Flanges
Multiple patterns are forged and finished in-house, available from stock or scheduled for current project demand.
ASTM A182 Gr F11 Weld Neck Flange
ASME B16.5 • ½″-24″- UNS K11572 Welding Neck Flanges
- ASME SA182 F11 Class 2 Weld Neck Flanges
ASTM A182 F11 Blind Flange
Class 150 To 2500- Alloy Steel F11 BLRF Flanges
- Chrome Moly F11 High Hub Blind Flanges
ASTM A182 F11 Slip On Flange
SORF • Class 150 & 300- ASME SA182 F11 SORF Flanges
- UNS K11572 Slip On Flanges
A182 Gr F11 Threaded Flange
NPT • BSP • BSPT- UNS K11572 Threaded Flanges
- DIN 1.7335 Hubbed Threaded Flange
F11 Alloy Steel Lap Joint Flange
With Stub End- Alloy Steel F11 LJ Flanges
- Chrome Moly F11 Lapped Joint Flanges
ASTM A182 F11 Class 2 Orifice Flanges
ASME B16.36- Alloy Steel F11 Orifice Flange Sets
- DIN 1.7335 Orifice Flange with Jack Screws
ASTM A182 F11 CL2 Spectacle Blind Flanges
ASME B16.48- Alloy Steel F11 Paddle Spacer Flanges
- UNS K11572 Spectacle Blind Flanges
A182 F11 Plate Flange
Flat Face • Backing Ring- ASTM A182 F11 Flat Flanges
- Alloy Steel F11 EN 1092-1 Plate Flange
UNS K11572 Long Weld Neck Flange
LWN • Barrel Type- ASTM A182 F11 Barrel Type Nozzle Flanges
- DIN 1.7335 Long Weld Neck Flange
Alloy Steel F11 Flanges Manufacturing Standards
Which document controls each flange detail, from dimensions to hardness requirements.
SA182 Grade F11 Class 2 Flange Vs Class 1 Vs Class 3
One grade, three strength levels; classes define heat treatment and strength, not pressure.
| Property | F11 Class 1 | F11 Class 2 | F11 Class 3 |
|---|---|---|---|
| UNS Number | K11597 | K11572 | K11572 |
| Carbon, % | 0.05-0.15 | 0.10-0.20 | 0.10-0.20 |
| Manganese, % | 0.30-0.60 | 0.30-0.80 | 0.30-0.80 |
| Phosphorus, max % | 0.030 | 0.040 | 0.040 |
| Sulfur, max % | 0.030 | 0.040 | 0.040 |
| Tensile Strength, min | 60 ksi [415 MPa] | 70 ksi [485 MPa] | 75 ksi [515 MPa] |
| Yield Strength, min | 30 ksi [205 MPa] | 40 ksi [275 MPa] | 45 ksi [310 MPa] |
| Elongation, min % | 20 | 20 | 20 |
| Brinell Hardness, HBW | 121-174 | 143-207 | 156-207 |
Where Each Class Lands
- Class 1: softest of the three, lowest carbon, easiest to weld and form
- Class 2: the volume grade - what B16.5 and B16.47 rating tables are built around
- Class 3: highest strength of the three, at the cost of a higher hardness floor
- Chromium & Moly: identical across all three at 1.00-1.50% Cr and 0.44-0.65% Mo
Ordering Points That Save Rework
- Name The Class: “A182 F11” alone is an incomplete callout - state 1, 2 or 3
- B16.5 Flanges: supplied normalised and tempered only, never annealed
- Sour Duty: the lower hardness of Class 1 can be the deciding factor
- No Silent Upgrade: we do not ship Class 3 against a Class 2 line without written agreement
Supplier of Alloy Steel F11 Slip On Flanges in Class 1 With Pressure Class 150 and 300
ASTM A182 F11 Class 2 Orifice Flanges Pressure-Temperature Rating
The stamped class is room-temperature rated; actual hot-service capacity follows ASME B16.5 tables.
| Temperature °F | Class 150 | Class 300 | Class 600 | Class 900 | Class 1500 | Class 2500 |
|---|---|---|---|---|---|---|
| -20 to 100 | 290 | 750 | 1500 | 2250 | 3750 | 6250 |
| 200 | 260 | 750 | 1500 | 2250 | 3750 | 6250 |
| 300 | 230 | 720 | 1445 | 2165 | 3610 | 6015 |
| 400 | 200 | 695 | 1385 | 2080 | 3465 | 5775 |
| 500 | 170 | 665 | 1330 | 1995 | 3325 | 5540 |
| 600 | 140 | 605 | 1210 | 1815 | 3025 | 5040 |
| 700 | 110 | 570 | 1135 | 1705 | 2840 | 4730 |
| 800 | 80 | 510 | 1015 | 1525 | 2540 | 4230 |
| 900 | 50 | 450 | 900 | 1350 | 2245 | 3745 |
| 1000 | 20 | 215 | 430 | 650 | 1080 | 1800 |
| 1100 | - | 95 | 190 | 290 | 480 | 800 |
| 1200 | - | 40 | 80 | 125 | 205 | 345 |
SA 182 Gr F11 Socket Weld Flange Exporter In India To Jebel Ali & Khalifa Port
UAE consignments are marked, listed and papered before the vessel is booked.
A182 Gr F11 Threaded Flange Applications
As an ASTM A182 F11 Flanges Supplier in India, we serve refineries, power plants, and process industries.
ASME SA182 F11 Flat Face Flange Manufacturing Process
Nine fixed stages on the route card, with the parent heat number carried across at every one of them.
Billet Sawing
Closed-Die Forging
Cool Below 538°C
Normalise
Hardness Gate
CNC Turning & Drilling
Marking & Release
SA 182 F11 Blind Flange Chemical Composition
Chromium and molybdenum remain the same; carbon, manganese, and residual limits distinguish Classes 1, 2, and 3.
Mechanical Properties Of ASTM A182 F11 Slip On Flange
ASTM A182 requirements for Class 2 forgings tested at room temperature - the common B16.5 enquiry level.
ASTM A182 Gr F11 Flange Equivalent
F11 is the forged 1.25Cr-0.5Mo grade, with matching chemistry across pipe, tube, fitting, and plate standards.
ASTM / ASME (USA)
- ASTM A182 F11 / ASME SA182 F11
- Class 1 - UNS K11597
- Class 2 and Class 3 - UNS K11572
DIN / EN (Germany)
- Werkstoff 1.7335
- 13CrMo4-5
- DIN 13CrMo44
JIS (Japan)
- JIS SFVA F11 - forgings
- JIS SCMV 3 - plate
Same Chemistry, Other Product Forms
- ASTM A335 P11 - seamless pipe
- ASTM A234 WP11 - butt weld fittings
- ASTM A213 T11 - boiler tube
- ASTM A387 Grade 11 - pressure vessel plate
Trade & Shop Names
- Chrome Moly / Chromoly
- 1.25Cr-0.5Mo and 1¼Cr-½Mo
- P11 and T11 in pipe and tube form
- Grade 11
Weld & Code Grouping
- ASME Section IX P-No. 4, Group 1
- ASME B16.5 Material Group 1.9
- Grouped apart from F5, F9, F22 and F91
ASTM A182 Gr F11 Weld Neck Flange Weight Chart
Approximate piece weights in kg for crate planning and freight costing - F11 sits at roughly 7.85 g/cm³,.
| Nominal Pipe Size (NPS) | Class 150 (kg) | Class 300 (kg) | ||||
|---|---|---|---|---|---|---|
| Weld Neck | Slip On | Blind | Weld Neck | Slip On | Blind | |
| 1/2 | 0.9 | 0.5 | 0.9 | 0.9 | 0.9 | 0.9 |
| 3/4 | 0.9 | 0.9 | 0.9 | 1.4 | 1.4 | 1.4 |
| 1 | 1.4 | 0.9 | 0.9 | 1.8 | 1.4 | 1.8 |
| 1-1/4 | 1.4 | 1.4 | 1.4 | 2.3 | 2.0 | 2.7 |
| 1-1/2 | 1.8 | 1.4 | 1.8 | 3.2 | 2.9 | 3.2 |
| 2 | 2.7 | 2.3 | 2.3 | 4.1 | 3.2 | 3.6 |
| 2-1/2 | 4.5 | 3.6 | 3.2 | 5.4 | 4.5 | 5.4 |
| 3 | 5.2 | 4.1 | 4.1 | 8.1 | 5.9 | 7.2 |
| 4 | 7.4 | 5.9 | 7.7 | 11.9 | 10.6 | 12.6 |
| 5 | 9.5 | 6.8 | 9.0 | 16.2 | 13.0 | 16.7 |
| 6 | 11.7 | 8.6 | 12.2 | 20.3 | 17.6 | 22.5 |
| 8 | 18.9 | 13.5 | 21.2 | 31.1 | 26.1 | 36.5 |
| 10 | 24.3 | 19.4 | 31.5 | 45.0 | 36.5 | 55.8 |
| 12 | 39.6 | 28.8 | 55.4 | 63.9 | 51.8 | 83.3 |
| 14 | 51.3 | 40.5 | 63.0 | 92.7 | 74.3 | 112.5 |
| 16 | 63.0 | 47.7 | 81.0 | 112.5 | 94.5 | 141.8 |
| 18 | 74.3 | 58.5 | 99.0 | 144.0 | 113.9 | 186.3 |
| 20 | 88.7 | 74.3 | 128.3 | 180.0 | 141.8 | 231.8 |
| 24 | 120.6 | 99.0 | 193.5 | 261.0 | 220.5 | 360.0 |
SA 182 Gr F11 Socket Weld Flange Sour Service & NACE Control
Common across Gulf, North African, and West African enquiries, yet often missed on purchase orders.
What The Standard Asks For
- Hardness Ceiling: carbon and low-alloy steels held to 22 HRC, roughly 237 HBW
- Everywhere: the limit applies to parent metal, weld metal and the heat affected zone
- Every Reading: individual results, not an average across the piece
- Nickel: kept below 1% mass fraction in the material and the filler
- Weldments: stress relieved at 620°C minimum to bring the joint under the ceiling
Where F11 Sits Against It
- Class 2 Band: 143 to 207 HBW - the whole band falls under the 237 HBW figure
- Class 1 Band: 121 to 174 HBW, lower again where the specification is tight
- Condition: normalised and tempered, which is what the standard expects to see
- Record: hardness printed on the MTC heat by heat, not quoted from a catalogue
What Are the Welding Guidelines for ASTM A182 F11 Flanges?
Chrome-moly is more forgiving than Grade 91, but still requires proper preheat during welding.
A182 F11 Plate Flange Surface Finish
Faces cut to the finish gasket schedule actually names, and bodies protected for the sea leg rather than the showroom.
ASME B16.5 Alloy Steel F11 Flange Supplier In Ahmedabad With Full EN 10204 3.2 Files
The certificate file travels with the lorry instead of arriving a fortnight later.
ASTM A182 F11 CL2 Spectacle Blind Flanges Testing Methods
What runs on every batch as standard, alongside the extras project buyers bolt on at enquiry stage.
UNS K11572 Long Weld Neck Flange Buying Tips
Eight things worth settling on the purchase order rather than discovering at the inspection table.
State The Material Class
Class 1, 2 or 3 • Hardness band moves with it
Give The Bore Schedule
Pipe schedule based • Not just NPS
Name The Facing
RF, FF or RTJ • Serrated or smooth
Pick The Certificate Level
EN 10204 3.1 • 3.2 needs 3rd party
Flag Sour Service Early
NACE conformity • Flag early always
Above 24″, Say Series A Or B
Series A or B • ASME B16.47
Price Tracks Weight
Tracks weight • Forging mass driven
Declare The Destination
Kenya, Saudi & more • Pre-shipment conformity
SA 182 F11 Cl2 RTJ Flange Documents & Country Approvals
Destination paperwork is settled at order stage, so nothing sits waiting at the discharge port.
South Africa
- SANS-referenced specification matching on request
- Heat-wise certificate set filed crate by crate
United Arab Emirates
- Origin certificate attested at the chamber
- Jebel Ali and Khalifa Port delivery
Canada
- CRN paperwork backed with material and drawing data
- Dimension sheets issued in both unit systems
ASTM A182 F11 Flanges Order-to-Delivery Timeline
Indicative movement windows, confirmed after checking size, class, quantity, and current rack stock.
Ex-Stock Dispatch
- Stocked sizes packed and out of the gate in 3-5 working days
Sea Freight
- Booked onto the first Nhava Sheva or Mundra sailing after crating
Air Freight
- Shutdown spares airborne within 3-6 days of release
Country-Specific ETA
- Arrival window per discharge port confirmed on your proforma
ASTM A182 F11 Slip On Flange Stocked & Dispatched Worldwide
Rack material and fresh forging batches both move out to buyers across the markets below.
UAE
TurkeyCanada
UK
Saudi Arabia
SingaporeUSA
Mexico
Thailand
Italy
NetherlandsGermany
Philippines
Malaysia
Uganda
IndonesiaSouth Africa
Kenya
Vietnam
VenezuelaASTM A182 F11 Flanges FAQs
The questions our desk fields most often before an F11 order is released.
What are ASME SA182 F11 weld neck flange dimensions governed by?
ASME B16.5 up to 24″, and B16.47 Series A / B or MSS SP-44 from 26″ upward.
What sizes are available in Chrome Moly F11 blind flanges?
½″ to 24″ NB in B16.5 and 26″ to 60″ NB in B16.47, Class 150 to 2500.
What is Alloy Steel F11 slip on flange material equivalent to?
1.25Cr-0.5Mo steel, equal to WNR 1.7335 / 13CrMo4-5, UNS K11572 and JIS SFVA F11.
What is A182 Gr F11 Class 2 socket weld flange?
Class 2 needs 485 MPa tensile, 275 MPa yield and 143-207 HBW, rated Group 1.9 in B16.5.
What is UNS K11572 orifice flange chemical composition?
Cr 1.00-1.50%, Mo 0.44-0.65%, C 0.10-0.20%, Mn 0.30-0.80%, Si 0.50-1.00%, balance iron.
What is the price of DIN 1.7335 threaded flanges in India?
Quoted per piece on NPS, class, facing and quantity, since forging weight drives the cost.
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