How you can get best quote and fast delivery of alloy steel flanges in Saudi
F5 / F9 / F11 / F22 / F91
Ready Stock in KSA
Top 10 Verified Quotes
Direct Mill Rates • Zero Commission
SABIC, ADNOC & Aramco
Approved Stockist Network
Mill Test Certificate
ASTM A182 • EN 10204 3.1/3.2
Pan-KSA Dispatch
Riyadh • Dammam • Jubail • Jeddah
No Login, No Mediator
Free Direct Buyer Access
Alloy Steel Flange Highlights
- Size Range: 1/2" (15 NB) to 48" (1200 NB)
- Pressure Class: 150# to 2500#
- Schedule:Sch 5 to XXS
- Grades: ASTM A182 F5, F9, F11, F12, F22, F91
- Standard: ASTM A182, A234, A105
- ASME: ASME B16.5, B16.47 Series A & B
- Types: Weld Neck, Slip On, Blind, Socket Weld, Threaded, Lap Joint, Spectacle Blind
- Face Type: RF, FF, RTJ
- Temperature Range:-29 to 538°C
- Process: Forging, Rolling, Casting
- Finish: Black, Phosphate, Galvanized on request
- Origin: India, Italy, South Korea, Saudi Arabia
- MTC: EN 10204 3.1 / 3.2 with PMI Report
- RFQ: Send Inquiry
SABIC & Saudi Aramco Approved Alloy Steel Flange Suppliers in Saudi Arabia
Table of Content
- Chrome Moly Flanges Wall Thickness
- AS Pipe Flange Specification
- Size Chart Of AS Pipe Flange
- Alloy Steel Flange Face Types
- Types of Alloy Steel Flanges
- Grades of Alloy Steel Flanges
- Alloy Steel Threaded Flanges Pressure Ratings
- Applications of Alloy Steel Flanges
- Chrome Moly Blind Flanges Thickness Chart
- Technology Of Alloy Steel Flange Forging
- Chemical Composition of Alloy Steel Plate Flanges
- Chrome Moly Flanges Equivalent Grades
- Mechanical Properties Of Nickel Alloy Spectacle Blind Flanges
- Manufacturing Processes of Alloy Steel Weld Neck Flange
- Chromoly 4130 Flanges Temperature Range
- Applications of Nickel Alloy Flanges
- Physical Properties of High Quality Alloy Steel Threaded Flanges
- Alloy Steel Flange Vs Carbon Steel Flange Key Difference
Supplied To:
Provide :
SABIC Approved Chrome Moly Blind Flanges Suppliers in Saudi Arabia With EN 10204 3.1/ 3.2
pipingmaterial.sa connects Saudi industrial buyers straight to genuine alloy steel flange stockists, cutting out brokers and hidden margins. With a management team carrying 26 years of steel trading experience across the Middle East and African oil & gas markets, the portal helps procurement teams locate chrome moly flange forgings offers various grades like F5, F9, F11 and F22 in warehouses across Dammam, Riyadh, Jubail and Jeddah, ready for same-week dispatch
AS Pipe Flange Specification
Genuine Alloy Steel Flanges Suppliers in Saudi Arabia, offering a wide range of products designed to meet international standards
Alloy Steel Flanges Sizes
- NPS: 1/2" to 48"
- Class: 150 to 2500#
- Schedule: Sch 5 to XXS
Alloy Steel Forged Flanges Threads
- MNPT, BSPT
- BSPP, FNPT
- NPT
Alloy Steel Slip On Flange Supporting Material
- Flange Bolts
- Gaskets
- Ring Joint
4145 Alloy Flanges Packaging
- Plastic Wrap/Bags
- Bubble Wrap
- Anti-Tarnish Paper
Chromium Alloy Steel Flange Testing
- Tensile, Pressure
- PMI test
- Hardness test
High Alloy Steel Weld Neck Flange Documentation
- MTC
- Third Party Inspection
- 100% Radiography Test Report
Chrome Moly Blind Flanges Origin
- Japanese, European
- American, Korean
- Indian
Low Alloy Steel Flanges Coating
- Anti-rust paint
- Oil varnishing
- Electric zinc coating
Chromoly 4130 Flanges Fulfill
- NACE MR0103
- NACE MR0175
- Sour service
Get Competitive Quotes from Top 10 Aramco Approved Alloy Steel Flanges Stockists in Saudi Arabia
No login required · No commission · Direct contact with actual alloy steel flange suppliers in Saudi Arabia
Send RFQGrade-Wise Alloy Steel Flange Specification
Click a grade above to open its flange type & dimensional specification.
5Cr-0.5Mo Chrome Moly Alloy
ASTM A182 F5 Flanges
C 0.15% Max
Cr 4.00-6.00%
Mo 0.45-0.65%
Mn 0.30-0.60%
Si 0.50% Max
P 0.030% Max
S 0.030% Max
Blind Flange
Forged · seals line ends
1/2"-48"
NB
Size Range
150-2500
#
Pressure Class
As per Class
mm
Thickness
Dimensions per ASME B16.5 / B16.47 · custom drilling on request
Standards
ASTM A182
ASME B16.5
EN 1092-1
Face Type
Raised Face
RTJ Face
Typical Applications
Refinery Hydroprocessing Units
Furnace Headers
Moderate High-Temp Steam Lines
9Cr-1Mo Chrome Moly Alloy
ASTM A182 F9 Flanges
C 0.15% Max
Cr 8.00-10.00%
Mo 0.90-1.10%
Mn 0.30-0.60%
Si 0.25-1.00%
P 0.030% Max
S 0.030% Max
Blind Flange
Forged · seals line ends
1/2"-48"
NB
Size Range
150-2500
#
Pressure Class
As per Class
mm
Thickness
Dimensions per ASME B16.5 / B16.47 · custom drilling on request
Standards
ASTM A182
ASME B16.5
EN 1092-1
Face Type
Raised Face
RTJ Face
Typical Applications
Reformer & Furnace Tubing Headers
Power Plant Steam Lines
Hydrocracker Units
1.25Cr-0.5Mo Chrome Moly Alloy
ASTM A182 F11 Flanges
Most-stocked grade across Dammam & Jubail - all six flange types below are typically held ex-stock in Class 150 & 300.
C 0.05-0.15%
Cr 1.00-1.50%
Mo 0.44-0.65%
Mn 0.30-0.60%
Si 0.50-1.00%
P 0.030% Max
S 0.030% Max
Blind Flange
Forged · seals line ends
1/2"-48"
NB
Size Range
150-2500
#
Pressure Class
As per Class
mm
Thickness
Dimensions per ASME B16.5 / B16.47 · custom drilling on request
Standards
ASTM A182
ASME B16.5
EN 1092-1
Face Type
Raised Face
RTJ Face
Typical Applications
Refinery Crude & Vacuum Units
Hydrocracker & Hydrotreater Lines
Petrochemical Process Piping
EPC Project Tie-Ins
2.25Cr-1Mo Chrome Moly Alloy
ASTM A182 F22 Flanges
C 0.05-0.15%
Cr 2.00-2.50%
Mo 0.87-1.13%
Mn 0.30-0.60%
Si 0.50% Max
P 0.030% Max
S 0.030% Max
Blind Flange
Forged · seals line ends
1/2"-48"
NB
Size Range
150-2500
#
Pressure Class
As per Class
mm
Thickness
Dimensions per ASME B16.5 / B16.47 · custom drilling on request
Standards
ASTM A182
ASME B16.5
EN 1092-1
Face Type
Raised Face
RTJ Face
Typical Applications
Refinery Reformer Lines
Hydroprocessing Above 450°C
Power Plant Superheater Headers
9Cr-1Mo-V Modified Chrome Moly Alloy
ASTM A182 F91 Flanges
C 0.08-0.12%
Cr 8.00-9.50%
Mo 0.85-1.05%
V 0.18-0.25%
Nb 0.06-0.10%
P 0.020% Max
S 0.010% Max
Blind Flange
Forged · seals line ends
1/2"-24"
NB
Size Range
150-2500
#
Pressure Class
As per Class
mm
Thickness
Quenched & tempered condition · dimensions per ASME B16.5
Standards
ASTM A182
ASME B16.5
Face Type
Raised Face
RTJ Face
Typical Applications
Supercritical Power Plant Headers
Ultra-High-Temp Steam Piping
Boiler & Turbine Bypass Lines
Ready Stocks of Chrome Moly Flanges
Chrome Moly Flanges Wall Thickness
- SCH 10
- SCH 20
- SCH 30
- SCH 40
- SCH 80
- SCH 120
- SCH 160
- STD XS
- STD XXS
Find ADNOC Approved Stockists of AS Pipe Flange in Al Jubail, Providing 1/2"to 48" Sizes Range
Size Chart Of AS Pipe Flange
Alloy Steel Flanges suppliers in Saudi Arabia forges custom sizes and coatings to ASTM A182 and ASME B16.5 standards
| Pipe Size | OD of Flange | Dia of Raised Face | Dia of Hub at Base | Thickness of Flange | Dia or Bore | Dia of Hub at Bevel | Depth of Socket | Radius of Fillet | |
|---|---|---|---|---|---|---|---|---|---|
| Slip on Socket | Lap Joint | ||||||||
| O | R | X | Q | W | B | H | Z | r | |
| 1-1/4 | 4-5/8 | 2-1/2 | 2-5/16 | 5/8 | 1.70 | 1.72 | 1.66 | 9/16 | 3/16 |
| 3/4 | 3-7/8 | 1-11/16 | 1-1/2 | 1/2 | 1.09 | 1.11 | 1.05 | 7/16 | 1/8 |
| 1/2 | 3-1/2 | 1-3/8 | 1-3/16 | 7/16 | .88 | .90 | .84 | 3/8 | 1/8 |
| 2-1/2 | 7 | 4-1/8 | 3-9/16 | 7/8 | 2.94 | 2.97 | 2.88 | 3/4 | 5/16 |
| 3-1/2 | 8-1/2 | 5-1/2 | 4-13/16 | 15/16 | 4.07 | 4.10 | 4.00 | 7/8 | 3/8 |
| 1 | 4-1/4 | 2 | 1-15/16 | 9/16 | 1.36 | 1.38 | 1.32 | 1/2 | 1/8 |
| 3 | 7-1/2 | 5 | 4-1/4 | 15/16 | 3.57 | 3.60 | 3.50 | 13/16 | 3/8 |
| 12 | 19 | 15 | 14-3/8 | 1-1/4 | 12.88 | 12.92 | 12.75 | 1-9/16 | 1/2 |
| 5 | 10 | 7.5/16 | 6-7/16 | 15/16 | 5.66 | 5.69 | 5.56 | 15/16 | 7/16 |
| 16 | 23-1/2 | 18-1/2 | 18 | 1-7/16 | 16.16 | 16.19 | 16.00 | 1-3/4 | 1/2 |
| 1-1/2 | 5 | 2-7/8 | 2-9/16 | 11/16 | 1.95 | 1.97 | 1.90 | 5/8 | 1/4 |
| 2 | 6 | 3-5/8 | 3-1/16 | 3/4 | 2.44 | 2.46 | 2.38 | 11/16 | 5/16 |
| 8 | 13-1/2 | 10-5/8 | 9-11/16 | 1-1/8 | 8.72 | 8.75 | 8.63 | 1-1/4 | 1/2 |
| 4 | 9 | 6-3/16 | 5-5/16 | 15/16 | 4.57 | 4.60 | 4.50 | 15/16 | 7/16 |
| 6 | 11 | 8-1/2 | 7-9/16 | 1 | 6.72 | 6.75 | 6.63 | 1-1/16 | 1/2 |
| 14 | 21 | 16-1/4 | 15-3/4 | 1-3/8 | 14.14 | 14.18 | 14.00 | 1-5/8 | 1/2 |
| 10 | 16 | 12-3/4 | 12 | 1-3/16 | 10.88 | 10.92 | 10.75 | 1-5/16 | 1/2 |
| 20 | 27-1/2 | 23 | 22 | 1-11/16 | 20.20 | 20.25 | 20.00 | 2-1/8 | 1/2 |
| 18 | 25 | 21 | 19-7/8 | 1-9/16 | 18.18 | 18.20 | 18.00 | 1-15/16 | 1/2 |
| 24 | 32 | 27-1/4 | 26-1/8 | 1-7/8 | 24.25 | 24.25 | 24.00 | 2-1/2 | 1/2 |
Alloy Steel Flange Face Types
Supplier of Alloy Steel Flanges in Riyadh offers RF and FF face types with quick delivery to project sites
Raised Face (RF)
Flat Face (FF)
Ring Type Joint (RTJ)
Male & Female (M&F) Face
Tongue & Groove (T&G) Face
Serrated Concentric Finish
Smooth / Spiral Finish
Lap Joint Stub End Face
Types of Alloy Steel Flanges
Alloy Steel Slip On Flange
- Size: 1/2" - 24"
- Class: 150# - 900#
- Economical Low-Pressure Choice
AS Blind Flanges
- Size: 1/2" - 48"
- Used to Seal Line Ends
- ASTM A182, EN 1092-1
Chrome Moly Weld Neck Flange
- Size: 1/2" - 48"
- Class: 150# - 2500#
- ASTM A182 / ASME B16.5
High Alloy Steel Socket Weld Flange
- Size: 1/2" - 4"
- Class: 150# - 2500#
- Small Bore High-Pressure Lines
Low Alloy Steel Threaded Flange
- Size: 1/2" - 4"
- No-Weld Installation
- Low-Pressure Utility Lines
Chromoly 4130 Plate Flange
- Plate Cut to Drawing
- Non-Standard Bolt Circles
- Custom Project Specification
AS Lap Joint Flanges
- Used with Stub Ends
- Class: 150# - 1500#
- Frequent Dismantling Lines
High Nickel Alloy Orifice Flanges
- Used for Flow Measurement
- Fitted With Orifice Plate & Taps
- High-Nickel Corrosion Resistant Grades
Chromium Alloy Steel Spectacle Blind Flanges
- Figure-8 Isolation Plate
- Positive Line Isolation
- ASME B16.48
Connect Directly With NORSOK Approved Alloy Steel Flange Suppliers in Saudi Arabia
Send your inquiry to pipingmaterial.sa for an alloy steel flange stockist that actually holds your grade, class and size in ex-stock. No commission. Best price.
Request Quote NowGet Dealers and Distributors of Low Alloy Steel Flanges in Various Grades as per Standard ASME B16.5
Grades of Alloy Steel Flanges
View Alloy Steel Flanges Traders in Saudi Arabia supplying premium grades
⚙️
ASTM A182 F5
- UNS K41545
- 5Cr-0.5Mo Composition
- Moderate High-Temperature Service
⚙️
ASTM A182 F9
- UNS K90941
- 9Cr-1Mo Composition
- Higher Chrome for Better Oxidation Resistance
- UNS K11572
- 1.25Cr-0.5Mo Composition
- Most Common Refinery Flange Grade
- UNS K21590
- 2.25Cr-1Mo Composition
- Better Creep Strength at High Temperature
- UNS K90901
- 9Cr-1Mo-V Composition
- Premium Grade for Power Plant Applications
Ex-Stock Network Across Saudi Arabia
🌎 Countries
Sudan
Congo
South Africa
Ivory Coast
Rwanda
Kenya
Republic of the Congo
Gabon
Nigeria
Chad
Cameroon
Equatorial Guinea
Benin
Togo
West Africa
Ghana
Nairobi
Kenya
Addis Ababa
Ethiopia
Durban
South Africa
Lagos
Nigeria
Addis Ababa
Ethiopia
Johannesburg
South Africa
Abuja
Nigeria
Cape Town
South Africa
Refer Pressure Class of Chromoly 4130 Flanges and Chromium Alloy Steel Weld Neck Flange
Alloy Steel Threaded Flanges Pressure Ratings
ADNOC approved Alloy Steel Flanges come in Class 150 to 2500, with RF and RTJ face types for offshore platform uses
| Temp (°F) | 1000 | -20 to 100 | 400 | 200 | 500 | 300 | 700 | 600 | 900 | 800 |
|---|---|---|---|---|---|---|---|---|---|---|
| (Class 600) | 330 | 1390 | 1280 | 1360 | 1245 | 1305 | 1135 | 1210 | 900 | 1015 |
| (Class 150) | 20 | 265 | 200 | 260 | 170 | 230 | 110 | 140 | 50 | 80 |
| (Class 900) | 495 | 2085 | 1920 | 2035 | 1865 | 1955 | 1705 | 1815 | 1350 | 1525 |
| (Class 300) | 165 | 695 | 640 | 680 | 620 | 655 | 570 | 605 | 450 | 510 |
| (Class 2500) | 1370 | 5785 | 5330 | 5660 | 5180 | 5435 | 4730 | 5040 | 3745 | 4230 |
Applications of Alloy Steel Flanges
SABIC approved Alloy Steel Flanges suppliers stock weld neck and blind types with phosphate coatings for petrochemical applications
Oil & Gas Process Piping
Refinery Crude & Vacuum Units
Power & Boiler Plants
Reformer & Hydrocracker Lines
Fertiliser & Petrochemical Plants
Furnace & High-Temp Headers
Heat Exchangers & Boilers
Steam & High-Pressure Lines
EPC Plant Construction
Pipeline Tie-Ins & Skids
Desalination Plant Piping
Cement & Mining Process Plants
Locate Available Material from Stock
Trusted Alloy Steel Flanges suppliers in Saudi Arabia combine verified mill sizes, coatings and face types under one inquiry
Sales Agents in Following Locations
Also covers Syria • Yemen • Iraq • Turkey on request
GCC Countries
Qatar
Saudi Arabia
UAE
All 6 GCC member states covered — ex-stock & indent supply
MENA Countries
North Africa & Levant — regular sea freight schedules
View 4145 Alloy Flanges Tolerance and High Alloy Steel Weld Neck Flange Thickness Chart
Chrome Moly Blind Flanges Thickness Chart
Check Alloy Steel Flanges Suppliers in Saudi Arabia, Gives Excellent Thickness Chart for Flanges.
| NPS (Normal Pipe Sizes) | 1 ¼ | ½ | 1 ½ | ¾ | 2 ½ | 1 | 3 ½ | 2 | 6 | 14 | 3 | 4 | 10 | 8 | 5 | 18 | 12 | 24 | 16 | 26 | 20 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Outside Daimeter (O.D.) | 1.66 | 0.84 | 1.9 | 1.05 | 2.875 | 1.315 | 4 | 2.375 | 6.625 | 14 | 3.5 | 4.5 | 10.75 | 8.625 | 5.563 | 18 | 12.75 | 24 | 16 | 26 | 20 |
| Schedule 30 | ... | ... | ... | ... | ... | ... | ... | ... | ... | 0.375 | ... | ... | 0.307 | 0.277 | ... | 0.438 | 0.33 | 0.562 | 0.375 | .... | 0.5 |
| Schedule 10 | 0.109 | 0.083 | 0.109 | 0.083 | 0.12 | 0.109 | 0.12 | 0.109 | 0.134 | 0.25 | 0.12 | 0.12 | 0.165 | 0.148 | 0.134 | 0.25 | 0.18 | 0.25 | 0.25 | .... | 0.25 |
| STD Wall | 0.14 | 0.109 | 0.145 | 0.113 | 0.203 | 0.133 | 0.226 | 0.154 | 0.28 | 0.375 | 0.216 | 0.237 | 0.365 | 0.322 | 0.258 | 0.375 | 0.375 | 0.375 | 0.375 | 0.375 | 0.375 |
| Schedule 20 | ... | ... | ... | ... | ... | ... | ... | ... | ... | 0.312 | ... | ... | 0.25 | 0.25 | ... | 0.312 | 0.25 | 0.375 | 0.312 | .... | 0.375 |
| Schedule 60 | ... | ... | ... | ... | ... | ... | ... | ... | ... | 0.594 | ... | ... | 0.5 | 0.406 | ... | 0.75 | 0.562 | 0.969 | 0.656 | .... | 0.812 |
| Schedule 40 | 0.14 | 0.109 | 0.145 | 0.113 | 0.203 | 0.133 | 0.226 | 0.154 | 0.28 | 0.438 | 0.216 | 0.237 | 0.365 | 0.322 | 0.258 | 0.562 | 0.406 | 0.688 | 0.5 | .... | 0.594 |
| Schedule 100 | ... | ... | ... | ... | ... | ... | ... | ... | ... | 0.938 | ... | ... | 0.719 | 0.594 | ... | 1.156 | 0.844 | 1.531 | 1.031 | .... | 1.281 |
| EXT Hvy | 0.191 | 0.147 | 0.2 | 0.154 | 0.276 | 0.179 | 0.318 | 0.218 | 0.432 | 0.5 | 0.3 | 0.337 | 0.5 | 0.5 | 0.375 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Schedule 120 | ... | ... | ... | ... | ... | ... | ... | ... | 0.562 | 1.094 | ... | 0.438 | 0.844 | 0.719 | 0.5 | 1.375 | 1 | 1.812 | 1.219 | .... | 1.5 |
| Schedule 80 | 0.191 | 0.147 | 0.2 | 0.154 | 0.276 | 0.179 | 0.318 | 0.218 | 0.432 | 0.75 | 0.3 | 0.337 | 0.594 | 0.5 | 0.375 | 0.938 | 0.688 | 1.219 | 0.844 | .... | 1.031 |
| Schedule 160 | 0.25 | 0.188 | 0.281 | 0.219 | 0.375 | 0.25 | ... | 0.344 | 0.719 | 1.406 | 0.438 | 0.531 | 1.125 | 0.906 | 0.625 | 1.781 | 1.312 | 2.344 | 1.594 | .... | 1.969 |
| Schedule 140 | ... | ... | ... | ... | ... | ... | ... | ... | ... | 1.25 | ... | ... | 1 | 0.812 | ... | 1.562 | 1.125 | 2.062 | 1.438 | .... | 1.75 |
| XX Hvy | 0.382 | 0.294 | 0.4 | 0.308 | 0.552 | 0.358 | 0.636 | 0.436 | 0.864 | ... | 0.6 | 0.674 | 1 | 0.875 | 0.75 | ... | 1 | .... | ... | .... | ... |
Technology of Alloy Steel Flange Forging
Free Forging
- Open-die shaping, no fixed mold
- Best for large & custom sizes
- Good for heavy-class flanges
Die Forging
- Closed-die pressing into mold
- High dimensional accuracy
- Best for standard bulk sizes
Chemical Composition of Alloy Steel Plate Flanges
Alloy Steel Flanges suppliers in Jeddah maintain lap joint and spectacle blind types for port and terminal applications
| Grade | P | Mn | Si | C | S | Cr | Mo |
|---|---|---|---|---|---|---|---|
| F9 | 0.03 | 0.3-0.6 | 0.5-1.0 | 0.15 max | 0.03 | 8-10 | 0.9-1.1 |
| F5 | 0.03 | 0.3-0.6 | 0.5-1.0 | 0.15 max | 0.03 | 4-6 | 0.44-0.65 |
| F22 | 0.03 | 0.3-0.6 | 0.5 | 0.50.15 max | 0.03 | 4-6 | 0.44-0.65 |
| F1 | 0.03 | 0.3-0.6 | 0.5 | 0.15 max | 0.03 | 4-6 | 0.44-0.65 |
| F11 | 0.03 | 0.3-0.6 | 0.5-1.0 | 0.5-0.15 | 0.03 | 1.0-1.5 | 0.44-0.65 |
| F12 | 0.03 | 0.3-0.6 | 0.5 | 0.15 max | 0.03 | 4-6 | 0.44-0.65 |
| F91 | 0.03 | 0.3-0.6 | 0.5-1.0 | 0.15 max | 0.03 | 8-10 | 0.9-1.1 |
Chrome Moly Flanges Equivalent Grades
🇺🇸
United States (ASTM / UNS)
- F11 Cl.2 - K11572 (ASTM A182)
- F22 Cl.3 - K21590
- F91 - K91560
- ASME B16.5 dimensional standard
🇩🇪
Germany (Werkstoff / DIN)
- F11 - 1.7335 13CrMo4-5
- F22 - 1.7380 10CrMo9-10
- F91 - 1.4903 X10CrMoVNb9-1
- DIN 2627 forged flange dimensions
🇯🇵
Japan (JIS)
- F11 - SCMV4
- F22 - SCMV3
- JIS B2220 flange dimensions
- Mills: JFE, Nippon, Sumitomo
🇮🇳
India (IS / BIS)
- Supplied to ASTM A182 spec
- Mills: Viraj, Bhansali, MIDHANI
- Forged & heat-treated condition
- EN 10204 3.1 certified
🇸🇪
Europe & Sweden (EN)
- EN 1092-1 forged flange standard
- F22 - 10CrMo9-10 (1.7380)
- Mills: Ovako, Outokumpu
- AFNOR (France) 12CD9.10
🇰🇷
South Korea (KS)
- Equivalent to ASTM A182 grades
- Mills: Sungoole, Hyundai Steel
- KS B 1503 flange dimension chart
- Wide ex-stock supply to GCC ports
🇦🇺
Australia (AS / SAA)
- AS 4087 / AS 2129 Table reference
- Imported to ASTM A182 conversion
- Used in mining & LNG projects
- Common Table D / Table E rating
🇸🇦
Saudi Arabia (Aramco / SASO)
- Supplied under Saudi Aramco SAES-D-001
- SASO conformity assessment available
- Local forging & machining options
- Stock held in Dammam & Jubail
Warehouse Locations of Partner Suppliers
Stockist of Alloy Steel Flanges fittings in Al Khobar carries matching elbows, tees and reducers in chrome moly grades
Azerbaijan
Baku
Andorra
Andorra la Vella
Georgia
Tbilisi
Armenia
Yerevan
Belgium
Brussels
Italy
Rome
France
Paris
Netherlands
Amsterdam
Germany
Berlin
Mechanical Properties Of Alloy Steel Socket Weld Flange
Alloy Steel Flanges suppliers in KSA deliver all pressure classes with PMI-tested heats and EN 10204 3.1 documents
Manufacturing Processes of Alloy Steel Weld Neck Flange
Heating
Billet heated to forging temperature
Forming
Heated billet roughly shaped into the flange profile
Forging
Press forging refines grain flow & final shape
Cooling
Controlled cooling sets strength
Chromoly 4130 Flanges Temperature Range
Alloy Steel Flanges suppliers in Jubail supply high pressure classes for petrochemical plant applications
🌡️ Excellent Strength
- -423°F to 1300°F
- -253°C to 705°C
🔥 Excellent Oxidation Resistance
- Up to 1800°F
- 980°C
Physical Properties of High Quality Alloy Steel Threaded Flanges
Alloy Steel Flanges stockist in Yanbu provides socket weld and threaded sizes for refinery maintenance applications
⚙️ Grade F5
- Melting Point: 1427°C - 1454°C
- Density: 7.75 g/cm³
⚙️ Grade F9
- Melting Point: 1427°C - 1454°C
- Density: 7.75 g/cm³
⭐ Grade F11
- Melting Point: 1427°C - 1454°C
- Density: 7.75 g/cm³
⚙️ Grade F22
- Melting Point: 1427°C - 1454°C
- Density: 7.75 g/cm³
⚙️ Grade F91
- Melting Point: 1427°C - 1454°C
- Density: 7.75 g/cm³
📋 Quick Reference
- All grades: same melting range
- Density consistent across F5-F91
Alloy Steel Flanges Supplied In Following Cities
| Product | Project Name | Location |
|---|---|---|
| AS Pipe Flange | S-Chem | Qassim, Saudi Arabia |
| Alloy Steel Threaded Flanges | Saudi Technology Base Oil plant | Al-Kharj, Saudi Arabia |
| Chrome Moly Blind Flanges | Alaa For Industry (AFI) | Ha’il, Saudi Arabia |
| Alloy Steel Plate Flanges | KAMCO General Contracting Company | Al Khobar, Saudi Arabia |
Need ADNOC or Saudi Aramco Approved Alloy Steel Flanges Suppliers in Saudi Arabia?
Send us your bill of material - we will match you with the right approved stockist in Saudi Arabia within hours.
Get Approved Supplier ListAlloy Steel Flanges Lead Time From Ex-Stock vs Import Order
Alloy Steel Flanges suppliers in Dammam keep weld neck and slip on types with black and galvanized coatings in stock
Ex-Stock Dispatch Timeline
Local Saudi Stock
- Dammam & Jubail ex-stock dispatch: same-day to 2 days
- Fastest option small orders
⚡ Quickest Option
Import Order Lead Time
India / Overseas Origin
- India origin: 12-18 days sea freight to Dammam port
- Best for bulk project quantities
🚢 Best for Bulk Orders
Urgent Shutdown Dispatch
Emergency Requirement
- Air freight option available in 4-6 business days
- Availability varies by class
🚨 Shutdown Priority
Weekly Shipment to Below Locations
Alloy Steel Flanges suppliers in Saudi Arabia hold all standard sizes, classes and face types ready for ex-stock dispatch
Singapore
City-State
Brunei
Bandar Seri
Laos
Vientiane
Taiwan
Taipei
Vietnam
Ho Chi Minh
Indonesia
Jakarta
Mongolia
Ulaanbaatar
Thailand
Bangkok
Philippines
Manila
Myanmar
Naypyidaw
Malaysia
Kuala Lumpur
Cambodia
Phnom Penh
Alloy Steel Flange Vs Carbon Steel Flange Key Difference
PED approved Alloy Steel Flanges meet EU pressure equipment sizes and pressure classes with full 3.1/3.2 mill certification
High-Temperature Service
Alloy Steel
ASTM A182 F11/F22
VS
Standard Service
Carbon Steel
ASTM A105
Chromium
Content
Content
Molybdenum
Content
Content
Excellent
High-Temp
Strength
Strength
Limited
Higher
Material
Cost
Cost
Economical
- Furnace & reformer lines
- High-pressure steam piping
Typical
Saudi Use
Saudi Use
- General process piping
- Ambient temperature lines
Refinery Upgrade
Saudi Aramco - SATORP Refinery Expansion
4" to 12" Alloy Steel Slip On Flange, Class 600
Jubail, Saudi Arabia
Petrochemical Plant
SABIC - Yanpet Ethylene Complex
2" to 8" AS Blind Flanges, Class 300
Al Jubail, Saudi Arabia
Offshore Platform
ADNOC - Upper Zakum Field Development
Chrome Moly Weld Neck Flange
Abu Dhabi, UAE
Power & Steam Plant
KNPC - Al-Zour Refinery Power Block
High Alloy Steel Socket Weld Flange
Al-Zour, Kuwait
LNG Terminal
TotalEnergies - Zeebrugge LNG Terminal
6" to 10" AS Lap Joint Flange, Class 600
Zeebrugge, Belgium
North Sea Offshore Rig
Equinor - Johan Sverdrup Field
Alloy Steel Threaded Flanges
Stavanger, Norway
Crude Refinery Unit
Chevron - Pascagoula Refinery Revamp
4" to 16" F5 Chrome Moly Flanges, Class 300
Mississippi, USA
Chemical Process Unit
Dow Chemical - Freeport Complex Expansion
High Alloy Steel Socket Weld Flange
Texas, USA
Fertiliser Plant
SAFCO - Urea Plant Expansion Phase V
Alloy Steel Spectacle Blind Flange, Class 600
Al Jubail, Saudi Arabia
Alloy Steel Flange Frequently Asked Questions
What sizes of alloy steel flanges are kept ex-stock in Dammam and Jubail?▼
- Common ex-stock sizes: 1/2" to 12"
- Class 150# and 300# are widely available
- Cut-to-drawing and bore-machining services available on request
Are these flanges suitable for sour service (H2S) applications?▼
- Alloy Steel Flanges supplied to NACE MR0175 / ISO 15156 sour service requirements
- Hardness must be controlled
How do I identify the correct alloy steel flange pressure class?▼
- Check the line's design pressure & temperature
- Match values to ASME B16.5 pressure-temperature rating table
- Confirm grade compatibility with mating flange
Can alloy steel flanges be galvanized or coated?▼
- Yes, black, phosphate & hot-dip galvanized finishes available
- Coating choice depends on service environment
What documents come with alloy steel flange supply?▼
- EN 10204 3.1 / 3.2 Mill Test Certificate
- PMI report & heat-wise traceability
- Third-party inspection report on request
What is the minimum order quantity for alloy steel flanges?▼
- No fixed MOQ for ex-stock sizes
- Bulk project orders get better per-piece pricing
How can I verify a genuine alloy steel flange supplier in Saudi Arabia?▼
- Ask for Saudi Aramco / SABIC approval reference
- Request EN 10204 3.1/3.2 MTC matched to heat number
- Use pipingmaterial.sa to connect with verified ex-stock holders
