- Flange Types: Slip-On, Weld Neck, Socket Weld, Threaded, Blind, Lap Joint
- Material Options: Carbon Steel, Stainless Steel, Alloy Steel
- Common Sizes: 1", 1.5", 2", 3", 4", 6" Diameter Flanges
- Standards: ANSI B16.5, BS 10, EN 1092-1, SAE, DIN 2501
- Pressure Ratings: 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
- European Series: PN 40, PN 10, PN 100, PN 25, PN 6, PN 63, PN 16
- Types: SORF, BLRF, WNRF, SWRF, LJ, LWN flange
- Flange Face: Raised Face & Flat Face, Ring Type Joint, Tongue and Groove, Male and Female flange
- Applications: Oil & Gas, Petrochemical, Power Generation, Water Treatment
- Manufacturing Process: Forged & Cast Construction Available
- Customization: Specialty Flanges & Custom Bore Sizes
- Test Reports: Hydrostatic Pressure Test & Pneumatic Leak Test Certified
- Delivery Options: Stock & Urgent Sourcing Available KSA-Wide
- HSN Code: 73072990
Certified Flanges Suppliers in Saudi Arabia for Critical Pipeline Infrastructure
Get ANSI B16.5 Certified Industrial Flanges Ex.Stock in Al Khobar and Dammam With 150 LBS to 2500 LBS Pressure Ratings
Pipingmaterial.sa connects industrial buyers and contractors with verified flanges stockists in Saudi Arabia holding ex-stock inventory in Al Khobar, Dammam, Riyadh, Jeddah, and Jubail. supply engineered flanges like weld neck, slip-on, socket weld, reducing, and specialty flanges manufactured under strict quality control, including standard sizes (2", 3", 4") and custom flanges to ANSI B16.5 specs, all with complete mill test certificates. Submit your RFQ for steel flanges and get verified quotes within 4 hours from ARAMCO-approved and SABIC-certified Suppliers of flanges in Jeddah across the Eastern Province and Central Region.
Pipingmaterial.sa is Saudi Arabia's first free B2B portal connecting buyers directly with actual Flanges Suppliers in Saudi Arabia, no login, no commission, no middleman. Backed by 26 years of industry experience exporting to oil & gas and petrochemical sectors across the Middle East and Africa, we help you find stockists of Flanges in Al Jubail who really have the material in stock , not just traders. Just send your inquiry, and we'll connect you with the right stockists in Riyadh. You'll get quotes from up to 10 flanges suppliers in Dammam with delivery estimates, and can contact them directly by email, phone, or WhatsApp saving you time and cost.
- Industrial Pipe Flanges Specification
- Complete Guide to Flange Types and Classifications
- Common Flange Material Grades
- ANSI B16.5 vs BS 10 Flange Standards
- JIS Flanges Dimensions
- Custom Flange Weight Calculator
- Slip-On Flanges vs Threaded Flanges Installation Method
- When and How to Use Reducing Flanges?
- Blind Flanges Pressure Ratings and Selection Guide
- Steel Flanges Material Comparison
- CNC Flange Weight Chart
- Forged vs Cast Flanges
- Forged Steel Flanges Price KSA
- Pipe Flange Pressure Rating
- Exotic Flanges Standards
- Raised Face vs Flat Face
- Standard Flange Sizes
- SAE Flange Standards for Hydraulic Systems
- EN 1092-1 European Flange Specifications
- DIN Flanges for Precision Engineering
- Flange Bolting Chart
- Industrial Flanges Hydrostatic Testing Process Flow
- Installation Guide for Steel Flange
- Flange Facing Machining Tolerance
- Corrosion Resistance in ISO Flange Selection
- Petrochemical Flanges Bulk Purchasing Strategies
- How to Order High Yield Flanges in KSA?
- Corrosion Resistant Flange Applications
Industrial Pipe Flanges Specification
Every inquiry submitted on pipingmaterial.sa reaches multiple verified flanges stockists in Saudi Arabia simultaneously. No middlemen, just direct quotes with full technical documentation from inquiry to delivery.
- NPS 1/2" to 60"
- DN 15 to DN 1500
- Class 150 to Class 2500
- Custom Sizes Available
- Raised Face
- Flat Face
- Ring Type Joint
- Tongue & Groove
- ASTM A105 / A105N
- ASTM A182 F304 / F316
- ASTM A182 F11 / F22
- ASTM A182 F51
- ASME B16.5 / B16.47
- ASME B16.48
- EN 1092-1 / DIN 2632-2638
- API 6A / API 6B
- American, Korean
- Japanese
- European
- Indian
- Mill Test Certificate
- PMI, Hydro, UT / RT Testing
- NACE MR0175 / ISO 15156
- Aramco / ADNOC Approved
- NPT
- BSPP
- BSPT
- UNC / Metric
- Serrated
- Smooth
- Hot-dip Galvanized
- FBE / 3LPE Coating
- SMAW / SAW
- TIG
- MIG
- PWHT per ASME B31.3 if required
Offer Aramco Approved Forged Flange Online in Various Material, Grades and Types With Complete Mill Test Certificates
Find Verified Flange Stockists in Riyadh Holding Ex-stock Flanges, Ready For Fast Quotes And Quick Delivery
Complete Guide to Flange Types and Classifications
Choosing the right flange type matters for your piping system's performance and safety. Each of the below flange types suited to different pressure ratings and installation needs, it is commonly used across oil & gas, power generation, and petrochemical industries.Find here genuine flanges stockists in Saudi Arabia
- Connection: Double fillet weld
- Pressure Rating: Low to Medium
- Installation: Slides over pipe
- Standard: ANSI / ASME B16.5
- Material: SS, CS, Alloy, Duplex, Nickel Alloy
- Connection: Butt weld
- Pressure Rating: High pressure / temp
- Hub: Long tapered neck
- Standard: ANSI / ASME B16.5
- Material: SS, CS, Alloy, Duplex, Nickel Alloy
- Function: Seals pipe end
- Bore: No bore (solid disc)
- Pressure Rating: High pressure / temp
- Standard: ANSI / ASME B16.5
- Material: SS, CS, Alloy, Duplex, Nickel Alloy
- Connection: Single fillet weld
- Pipe Size: Small bore
- Pressure Rating: High pressure
- Standard: ANSI / ASME B16.5
- Material: SS, CS, Alloy, Duplex, Nickel Alloy
- Connection: Used with stub end
- Rotation: Rotates freely on pipe
- Pressure Rating: Low to Medium
- Standard: ANSI / ASME B16.5
- Material: SS, CS, Alloy, Duplex, Nickel Alloy
- Function: Isolate / connect line
- Design: Blind + spacer disc
- Operation: Rotated to switch position
- Standard: ASME B16.48
- Material: SS, CS, Alloy, Duplex, Nickel Alloy
- Connection: Butt weld
- Hub: Extended long neck
- Application: Pressure vessels / HEX
- Standard: ANSI / ASME B16.5
- Material: SS, CS, Alloy, Duplex, Nickel Alloy
- Function: Branch connection
- Design: Nipple + orifice combined
- Application: Instrumentation taps
- Standard: ANSI / ASME B16.5
- Material: SS, CS, Alloy, Duplex, Nickel Alloy
- Function: Connects different pipe sizes
- Reducer: Not required separately
- Pressure Rating: Low to High
- Standard: ANSI / ASME B16.5
- Material: SS, CS, Alloy, Duplex, Nickel Alloy
- Connection: Screwed (no weld)
- Pressure Rating: Low pressure only
- Installation: Quick fit / removable
- Standard: ANSI / ASME B16.5
- Material: SS, CS, Alloy, Duplex, Nickel Alloy
- Connection: Welded to pipe end
- Design: Flat, no hub
- Pressure Rating: Low pressure
- Application: Water / utility lines
- Material: SS, CS, Alloy
- Function: Flow measurement
- Design: Tapped pressure holes
- Works With: Orifice plate
- Application: Oil, gas, chemical
- Material: SS, CS, Alloy, Duplex, Nickel Alloy
Aramco Approved Flange Manufacturers & Stockists in KSA
Note:All companies listed are genuine, verified stockists and Suppliers of Flange in KSA. Confirm current Aramco AVL status and MTC requirements directly with each suppliers before placing orders.
Flange Stockists in Dammam
Flange Suppliers in Al Jubail
Flange Stockists in Riyadh
Buy Direct From Flange Suppliers in Al Jubail - No Mediator, No Commission
Connect straight with manufacturers and stockists across Saudi Arabia, with full mill test certificates and ARAMCO/SABIC approvals on every order. Free for buyers, always.
Send Your Flange RFQ Now - Response Within 4 HoursFind Hydrostatic & Pressure Tested Pipe Flange in Various Standards like BS 10, EN 1092-1, DIN, JIS, ISO, SAE etc.
ANSI B16.5 vs BS 10 Flange Standards
ANSI B16.5 (American) and BS 10 (British) are the two main standards used for flange design, dimensions, and pressure ratings. Both are common in Saudi Arabia's petrochemical sector
⚠ Important Note for Saudi Arabia Operations:ANSI B16.5 is mostly used in upstream operations with international contractors, while BS 10 is more common with regional Suppliers of flange in Al Khobar and downstream facilities. Always confirm which standard your project needs before ordering, to avoid compatibility issues.
Purchase Petrochemical Flanges in Most Demanded Sizes like 2/3/4" or Custom At Mill Prices, Refer Dimensions
JIS Flanges Dimensions
Flange dimensions & weight reference
View Dimensions ▼Flange dimensions & weight reference
View Dimensions ▼Flange dimensions & weight reference
View Dimensions ▼Flange dimensions & weight reference
View Dimensions ▼Flange dimensions & weight reference
View Dimensions ▼Flange dimensions & weight reference
View Dimensions ▼CLASS 150 Flange Dimensions
| NOMINAL SIZE | WEIGHT (KG) | DIMENSIONS | ||||
|---|---|---|---|---|---|---|
| NPS (Inches) | DN (mm) | WN | SOW SW | BLIND | FLANGE MM | FLANGE THICKNESS |
| 3/4 | 20 | 0.7 | 0.6 | 0.6 | 98.6 | 12.7 |
| 1/2 | 15 | 0.5 | 0.4 | 0.4 | 88.9 | 11.2 |
| 1 | 25 | 1 | 0.8 | 0.9 | 108 | 14.2 |
| 1 1/2 | 40 | 1.7 | 1.3 | 1.5 | 127 | 17.5 |
| 1 1/4 | 32 | 1.3 | 1 | 1.2 | 117.3 | 15.7 |
| 2 | 50 | 2.6 | 2.1 | 2.4 | 152.4 | 19.1 |
| 3 | 80 | 4.9 | 3.9 | 4.9 | 190.5 | 23.9 |
| 2 1/2 | 65 | 4.1 | 3.3 | 3.9 | 177.8 | 22.4 |
| 3 1/2 | 90 | 6.1 | 4.8 | 6.2 | 215.9 | 23.9 |
| 5 | 125 | 8.6 | 6.1 | 8.6 | 254 | 23.9 |
| 4 | 100 | 6.8 | 5.3 | 7.0 | 228.6 | 23.9 |
| 6 | 150 | 10.6 | 7.5 | 11.3 | 279.4 | 25.4 |
| 10 | 250 | 24 | 16.5 | 28.6 | 406.4 | 30.2 |
| 8 | 200 | 17.6 | 12.1 | 19.6 | 342.9 | 28.4 |
| 12 | 300 | 36.5 | 26.2 | 43.2 | 482.6 | 31.8 |
| 16 | 400 | 60.6 | 44.8 | 76.1 | 596.9 | 36.6 |
| 14 | 350 | 48.4 | 34.6 | 58.1 | 533.4 | 35.1 |
| 20 | 500 | 84.5 | 61.9 | 122.0 | 698.5 | 42.9 |
| 18 | 450 | 68.3 | 48.9 | 93.7 | 635 | 39.6 |
| 24 | 600 | 115 | 86.9 | 185.0 | 812.8 | 47.8 |
CLASS 300 Flange Dimensions
| NOMINAL SIZE | WEIGHT (KG) | DIMENSIONS | ||||
|---|---|---|---|---|---|---|
| NPS (Inches) | DN (mm) | WN | SOW SW | BLIND | FLANGE OD A MM | FLANGE THICKNESS D MM |
| 3/4 | 20 | 1.3 | 1.1 | 1.1 | 117.3 | 15.7 |
| 1/2 | 15 | 0.8 | 0.6 | 0.6 | 95.3 | 14.2 |
| 1 | 25 | 1.5 | 1.4 | 1.4 | 124 | 17.5 |
| 1 1/2 | 40 | 2.9 | 2.5 | 2.7 | 155.5 | 20.6 |
| 1 1/4 | 32 | 2.0 | 1.7 | 1.8 | 133.4 | 19.1 |
| 2 | 50 | 3.4 | 2.9 | 3.2 | 165.1 | 22.4 |
| 3 | 80 | 6.9 | 5.9 | 6.8 | 215.9 | 28.4 |
| 2 1/2 | 65 | 5.2 | 4.3 | 4.9 | 190.5 | 25.4 |
| 3 1/2 | 90 | 8.7 | 7.3 | 8.7 | 228.6 | 30.2 |
| 5 | 125 | 15.1 | 12.3 | 15.6 | 279.4 | 35.1 |
| 20 | 500 | 158.0 | 134.0 | 221.0 | 774.7 | 63.5 |
| 4 | 100 | 11.2 | 9.6 | 11.5 | 254 | 31.8 |
| 6 | 150 | 19.1 | 15.6 | 20.9 | 317.5 | 36.6 |
| 10 | 250 | 42.7 | 34.1 | 53.3 | 444.5 | 47.6 |
| 8 | 200 | 29.9 | 24.2 | 34.3 | 381 | 41.1 |
| 12 | 300 | 61.8 | 49.8 | 78.8 | 520.7 | 50.8 |
| 16 | 400 | 106.0 | 88.1 | 137.0 | 647.7 | 57.2 |
| 14 | 350 | 85.8 | 69.9 | 105.0 | 584.2 | 53.8 |
| 18 | 450 | 131.0 | 109.0 | 175.0 | 711.2 | 60.5 |
| 24 | 600 | 230.0 | 201.0 | 339.0 | 914.4 | 70.0 |
CLASS 600 Flange Dimensions
| NOMINAL SIZE | WEIGHT (KG) | DIMENSIONS | ||||
|---|---|---|---|---|---|---|
| DN (mm) | NPS (Inches) | WN | SOW SW | BLIND | FLANGE OD A MM | FLANGE THICKNESS D MM |
| 500 | 20 | 254.0 | 220.0 | 349.0 | 812.8 | 88.9 |
| 20 | 3/4 | 1.5 | 1.3 | 1.3 | 117.3 | 15.7 |
| 15 | 1/2 | 0.9 | 0.7 | 0.8 | 95.3 | 14.2 |
| 25 | 1 | 1.8 | 1.5 | 1.6 | 124.0 | 17.5 |
| 40 | 1 1/2 | 3.5 | 3 | 3.3 | 155.4 | 22.4 |
| 32 | 1 1/4 | 2.5 | 2 | 2.2 | 133.4 | 20.6 |
| 50 | 2 | 4.4 | 3.6 | 4.2 | 165.1 | 25.4 |
| 80 | 3 | 8.5 | 7 | 8.4 | 209.6 | 31.8 |
| 65 | 2 1/2 | 6.4 | 5.3 | 6.1 | 190.5 | 28.4 |
| 90 | 3 1/2 | 10.7 | 8.8 | 11 | 228.6 | 35.1 |
| 125 | 5 | 29.2 | 24.4 | 29.4 | 330.2 | 44.5 |
| 100 | 4 | 17.4 | 14.5 | 17.3 | 273.1 | 38.1 |
| 150 | 6 | 34.9 | 28.7 | 36.1 | 355.6 | 47.8 |
| 250 | 10 | 86.5 | 70.3 | 97.5 | 508 | 63.5 |
| 200 | 8 | 53.9 | 43.4 | 58.9 | 419.1 | 55.6 |
| 300 | 12 | 103.0 | 84.2 | 124 | 558.8 | 66.5 |
| 400 | 16 | 170.0 | 142.0 | 214 | 685.8 | 76.2 |
| 350 | 14 | 122.0 | 98.7 | 151 | 603.3 | 69.9 |
| 450 | 18 | 204.0 | 173.0 | 272 | 743 | 82.6 |
| 600 | 24 | 358.0 | 312.0 | 533.0 | 939.8 | 101.6 |
CLASS 900 Flange Dimensions
| NOMINAL SIZE | WEIGHT (KG) | DIMENSIONS | ||||
|---|---|---|---|---|---|---|
| DN (mm) | NPS (Inches) | WN | SOW SW | BLIND | FLANGE OD A MM | FLANGE THICKNESS D MM |
| 20 | 3/4 | 2.6 | 2.4 | 2.4 | 130 | 25.4 |
| 15 | 1/2 | 1.9 | 1.8 | 1.8 | 120.7 | 22.4 |
| 25 | 1 | 3.7 | 3.6 | 3.6 | 149.4 | 28.4 |
| 40 | 1 1/2 | 5.9 | 5.5 | 5.8 | 177.8 | 31.8 |
| 32 | 1 1/4 | 4.3 | 4 | 4.1 | 158.8 | 28.4 |
| 50 | 2 | 10.8 | 10.2 | 10 | 215.9 | 38.1 |
| 80 | 3 | 13.7 | 11.6 | 13.1 | 241.3 | 38.1 |
| 600 | 24 | 665.0 | 606.0 | 876.0 | 1041.4 | 139.7 |
| 65 | 2 1/2 | 15 | 13.9 | 14 | 244.3 | 41.1 |
| 100 | 4 | 22.5 | 19.7 | 26.9 | 292.1 | 44.5 |
| 150 | 6 | 47.7 | 41.1 | 47.4 | 381 | 55.6 |
| 125 | 5 | 37.4 | 31.9 | 36.5 | 349.3 | 50.8 |
| 200 | 8 | 81.3 | 70.7 | 82.5 | 469.9 | 63.5 |
| 300 | 12 | 157.0 | 133.0 | 173.0 | 609.6 | 79.2 |
| 250 | 10 | 119 | 101.0 | 122.0 | 546.1 | 69.9 |
| 350 | 14 | 180.0 | 153.0 | 206.0 | 641.4 | 85.6 |
| 450 | 18 | 292.0 | 258.0 | 367.0 | 787.4 | 101.6 |
| 400 | 16 | 217.0 | 185.0 | 259.0 | 704.9 | 88.9 |
| 500 | 20 | 362.0 | 317.0 | 463.0 | 857.3 | 108.0 |
CLASS 1500 Flange Dimensions
| NOMINAL SIZE | DIMENSIONS | WEIGHT (KG) | ||||
|---|---|---|---|---|---|---|
| DN (mm) | NPS (Inches) | FLANGE THICKNESS D MM | FLANGE OD A MM | SOW SW | BLIND | WN |
| 20 | 3/4 | 25.4 | 130 | 2.4 | 2.4 | 2.6 |
| 15 | 1/2 | 22.4 | 120.7 | 1.8 | 1.8 | 1.9 |
| 25 | 1 | 28.4 | 149.4 | 3.6 | 3.6 | 3.7 |
| 40 | 1 1/2 | 31.8 | 177.8 | 5.5 | 5.8 | 5.9 |
| 32 | 1 1/4 | 28.4 | 158.8 | 4 | 4.1 | 4.3 |
| 50 | 2 | 38.1 | 215.9 | 10.2 | 10.1 | 10.8 |
| 80 | 3 | 47.8 | 266.7 | 19.1 | 19.9 | |
| 65 | 2 1/2 | 41.1 | 244.3 | 13.9 | 14 | 15 |
| 100 | 4 | 53.8 | 311.2 | 29.9 | 29.9 | |
| 150 | 6 | 82.6 | 393.7 | 71.8 | 68.4 | |
| 125 | 5 | 73.2 | 374.7 | 58.4 | 55.4 | |
| 200 | 8 | 91.9 | 482.6 | 122 | 117 | |
| 300 | 12 | 124 | 673.1 | 316.0 | 288.0 | |
| 250 | 10 | 108 | 584.2 | 210.0 | 194.0 | |
| 600 | 24 | 203.2 | 1168.4 | 1558.0 | 1232.0 | |
| 350 | 14 | 133.4 | 749.3 | 420 | 380.0 | |
| 450 | 18 | 162.1 | 914.4 | 760.0 | 644.0 | |
| 400 | 16 | 146.1 | 825.5 | 558.0 | 485.0 | |
| 500 | 20 | 177.8 | 984.3 | 965.0 | 775.0 | |
CLASS 2500 Flange Dimensions
| NOMINAL SIZE | DIMENSIONS | WEIGHT (KG) | |||
|---|---|---|---|---|---|
| DN (mm) | NPS (Inches) | FLANGE THICKNESS D MM | FLANGE OD A MM | BLIND | WN |
| 20 | 3/4 | 31.8 | 139.7 | 3.5 | 3.7 |
| 15 | 1/2 | 30.2 | 133.4 | 3.0 | 3.1 |
| 25 | 1 | 35.1 | 158.8 | 5.0 | 5.2 |
| 40 | 1 1/2 | 44.5 | 203.2 | 10.4 | 10.9 |
| 32 | 1 1/4 | 38.1 | 184.2 | 7.4 | 7.7 |
| 50 | 2 | 50.8 | 235 | 15.6 | 16.2 |
| 80 | 3 | 66.5 | 304.8 | 34.8 | 36.2 |
| 250 | 10 | 165.1 | 673.1 | 411.0 | 406.0 |
| 65 | 2 1/2 | 57.2 | 266.7 | 22.6 | 23.7 |
| 100 | 4 | 76.2 | 355.6 | 53.9 | 55.3 |
| 150 | 6 | 108 | 482.6 | 141 | 143.0 |
| 125 | 5 | 91.9 | 419.1 | 90.8 | 92.5 |
| 200 | 8 | 127 | 552.5 | 214 | 215.0 |
| 300 | 12 | 184.2 | 762 | 592.0 | 572.0 |
Screwed Flange Approved Suppliers
Pipingmaterial.sa online B2B platform lists Aramco, Qatar Gas, ADNOC and KNPC approved distributors, dealers, manufacturers and stockists from Al Jubail, Yanbu, Riyadh, Dammam, Jeddah, Ras Al Khair. Every listed vendor supplies SABIC approved flanges with MTC.
Saudi Aramco Approved Flanges Suppliers
- Sandvik (Sweden)
- Special Metals (USA)
- Vallourec (France)
- Tubacex (Spain)
- Dynamic Forge & Fittings (India)
- Dae Hung (Korea)
- Galperti Group (Italy)
- Melesi (Officine Meccaniche Gaetano Melesi - Italy)
- Metalfar Prodotti Industriali (Italy)
- Ulma Piping (Spain)
- Kwang Dok Piping (Korea)
- Taekwang Bend (Korea) / Sungkwang Bend (Korea)
- CHW Forge (India)
ADNOC Approved Flanges Suppliers
- Ramesh Steel Corporation (India)
- Dynamic Forge & Fittings (India)
- Sumitomo (Japan)
- Voestalpine (Austria)
KNPC Approved Flanges Suppliers
- Nippon Steel Corporation (Japan)
- JFE Steel Corporation (Japan)
- Sandvik Materials Technology (Sweden)
Qatar Gas Approved Flanges Suppliers
- Galperti (Italy)
- Officine Ambrogio Melesi (Italy)
- Butting (Germany)
- Dai-ichi High Frequency (Japan)
- Bendtec (USA)
Custom Flange Weight Calculator
Select flange type, material, size and class to get estimated weight in kg.
* Weights are approximate estimates based on ASME B16.5 standard dimensions. Actual weight may vary by manufacturer. For certified mill weights, request MTC with your order.
Slip-On Flanges vs Threaded Flanges Installation Method
The choice between slip-on and threaded flanges affects installation, maintenance, and long-term costs. Each type has its own advantages, making it suitable for different applications and budgets across Saudi Arabia's industrial sector.
● Installation Method Comparison
When and How to Use Reducing Flanges?
Reducing flanges connect pipes of different sizes in one piece, no extra reducers or adapters needed. One side matches the larger size, the other the smaller, allowing a smooth transition between pipe diameters. Widely used in ARAMCO's Eastern Province network to reduce parts and simplify maintenance.
Applications
- Pump discharge: 3" inlet †’ 2" outlet
- Main line to branch line connection
- Large equipment to smaller downstream piping
- Flow velocity control via diameter reduction
- Pressure control: reduced system volume
Need Flanges Urgently? Find Flange Stockists in Dammam Now
From weld neck to reducing flanges, our network across Al Khobar, Dammam, Riyadh, and Jubail keeps ready stock for fast dispatch. One inquiry, multiple stockists of flanges in Saudi, no waiting.
Send Your Flange RFQ Now - Response Within 4 HoursBlind Flanges Pressure Ratings & Selection Guide
Blind flanges are rated per ASME B16.5 based on material group and temperature. Select class based on system pressure, temperature, and fluid service.
| Class | Max Pressure (bar) | Max Pressure (PSI) | Temp Range | Common Use |
|---|---|---|---|---|
| Class 150 | 19.6 bar | 285 PSI | -29°C to 538°C | Utility & water lines |
| Class 300 | 51.1 bar | 740 PSI | -29°C to 538°C | General process piping |
| Class 600 | 102.1 bar | 1480 PSI | -29°C to 538°C | Oil & gas process lines |
| Class 900 | 153.2 bar | 2220 PSI | -29°C to 538°C | High-pressure gas lines |
| Class 1500 | 255.3 bar | 3705 PSI | -29°C to 538°C | Wellhead & critical service |
| Class 2500 | 425.5 bar | 6170 PSI | -29°C to 538°C | Subsea & extreme HP service |
When to Use Class 150 / 300
- Water & utility pipeline isolation
- Low-pressure steam lines
- Non-critical process vents
- Hydrostatic test blanking
- Future nozzle blanking on tanks
When to Use Class 600 & Above
- Oil & gas production headers
- High-pressure steam isolation
- Wellhead & manifold blanking
- Subsea pipeline end closures
- ARAMCO / ADNOC critical service
Rule
Always use a blind flange with a class equal to or higher than the mating flange, never go lower, even for temporary blanking in high-pressure systems.
Steel Flanges Material Comparison
The material grade you choose directly affects a flange's performance including its temperature limits, corrosion resistance, and pressure capacity. Different materials suit different conditions and temperature ranges found across Saudi Arabia's petroleum operations.
CNC Flange Weight Chart
| Class | Nominal Pipe Size | Lap Joint | Blind | Socket Weld | Slip On | Threaded | Weld Neck |
|---|---|---|---|---|---|---|---|
| 150 lb | ½ | 1 | 2 | 2 | 1 | 1 | 2 |
| 1 | 2 | 2 | 2 | 2 | 2 | 3 | |
| 2 | 5 | 5 | 5 | 5 | 5 | 6 | |
| 3 | 9 | 9 | 9 | 9 | 9 | 11.5 | |
| 4 | 13 | 17 | 13 | 13 | 13 | 16.5 | |
| 5 | 15 | 20 | 15 | 15 | 15 | 21 | |
| 6 | 19 | 27 | 19 | 19 | 19 | 26 | |
| 300 lb | 1 | 3 | 4 | 3 | 3 | 3 | 4 |
| 1½ | 6.5 | 7 | 6 | 6.5 | 6.5 | 7 | |
| 2 | 7 | 8 | 7 | 7 | 7 | 9 | |
| 3 | 14.5 | 16 | 13 | 13 | 14 | 18 | |
| 4 | 24 | 28 | 22 | 23.5 | 24 | 26.5 | |
| 5 | 28 | 37 | 28 | 29 | 31 | 36 | |
| 6 | 39 | 50 | 39 | 39 | 39 | 45 | |
| 400 lb | ½ | 2 | 2 | 2 | 2 | 2 | 3 |
| 1 | 3.5 | 4 | 3.5 | 3.5 | 3.5 | 4 | |
| 1½ | 6.5 | 8 | 6.5 | 6.5 | 6.5 | 8 | |
| 2 | 8 | 10 | 8 | 8 | 8 | 10 | |
| 3 | 14 | 20 | 15 | 15 | 15 | 18 | |
| 4 | 25 | 33 | 26 | 26 | 26 | 35 | |
| 6 | 42 | 61 | 44 | 44 | 44 | 57 | |
| 600 lb | ¾ | 3 | 4 | 3 | 3 | 3 | 4 |
| 1¼ | 5 | 6 | 5 | 5 | 5 | 6 | |
| 2 | 9 | 10 | 9 | 9 | 9 | 12 | |
| 3 | 15 | 20 | 16 | 16 | 16 | 23 | |
| 4 | 36 | 41 | 37 | 37 | 37 | 42 | |
| 6 | 78 | 86 | 80 | 80 | 80 | 81 | |
| 10 | 195 | 231 | 177 | 177 | 177 | 190 | |
| 900 lb | ¾ | 6 | 6 | 6 | 6 | 6 | 7 |
| 1¼ | 10 | 10 | 10 | 10 | 10 | 10 | |
| 2 | 21 | 25 | 22 | 22 | 22 | 24 | |
| 2½ | 25 | 32 | 31 | 31 | 31 | 31 | |
| 4 | 51 | 54 | 53 | 53 | 53 | 53 | |
| 6 | 105 | 115 | 110 | 110 | 110 | 110 | |
| 8 | 190 | 200 | 172 | 172 | 172 | 187 | |
| 1500 lb | ½ | 6 | 4 | 6 | 6 | 6 | 7 |
| 1 | 8 | 9 | 8 | 8 | 8 | 9 | |
| 1½ | 14 | 14 | 14 | 14 | 14 | 14 | |
| 2 | 25 | 25 | 25 | 25 | 25 | 25 | |
| 3 | 47 | 48 | 48 | 48 | 48 | 48 | |
| 5 | 140 | 140 | 132 | 132 | 132 | 132 | |
| 8 | 286 | 302 | 260 | 260 | 260 | 275 | |
| 2500 lb | ½ | 7 | 7 | - | - | 7 | 8 |
| 1 | 12 | 12 | - | - | 12 | 13 | |
| 1½ | 24 | 25 | - | - | 25 | 28 | |
| 2½ | 53 | 56 | - | - | 55 | 52 | |
| 3 | 80 | 86 | - | - | 83 | 94 | |
| 5 | 204 | 223 | - | - | 210 | 244 | |
| 8 | 471 | 533 | - | - | 485 | 576 |
Discover RF and FF Face Corrosion Resistant Flanges Online Produced by Forged or Cast Method
Forged vs Cast Flanges
Industrial flanges are made by two main methods: forging and casting. Each produces a different internal material structure, leading to different strength and performance levels. Knowing this difference helps in choosing the right flange for critical applications across Saudi Arabia's infrastructure.
● Forged vs Cast Manufacturing Process
Forged Steel Flanges Price KSA
Indicative per-kg rates for common grades stocked in Saudi Arabia. Prices vary by size, class, and supplier.
Factors Affecting Forged Flange Price in KSA
- Larger diameter = more raw material
- 24" can cost 30-60- more than 1"
- Same class and grade basis
- Higher class = more forging material
- Class 2500 is 8-12- costlier than Cl 150
- For same size and grade
- Nickel alloys = 15-40- cost of carbon steel
- SS 316L = 3-4- the price of A105
- Duplex = 6-9- the price of A105
- Approved flanges carry 10-20% premium
- EN 10204 3.1 MTC mandatory
- Heat / lot traceability required
- Bulk orders (500+ pcs / 5 MT+)
- Attract 5-15% volume discount
- From KSA stockists and manufacturers
- China: 15-25% cheaper than EU / Japan
- India: mid-range pricing, fast delivery
- Freight adds SAR 1-4 per kg on imports
Pipe Flange Pressure Rating
Pressure rating shows the maximum pressure a flange can safely handle. ANSI B16.5 defines classes from 150 to 2500 LBS, each setting the thickness, bolt size, and design suited to specific operating conditions. Choosing the correct class is essential to prevent system failure and stay compliant across Saudi Arabia's industrial facilities.
| Temperature (°C) | Working Pressure (bar) | ||||||
|---|---|---|---|---|---|---|---|
| Class | |||||||
| 150 | 900 | 400 | 300 | 600 | 2500 | 1500 | |
| 50 | 19.5 | 155 | 68.9 | 51.7 | 103.4 | 431 | 259 |
| -29 - 38 | 19.8 | 155 | 68.9 | 51.7 | 103.4 | 431 | 259 |
| 100 | 17.7 | 155 | 68.7 | 51.5 | 103.0 | 429 | 258 |
| 200 | 13.8 | 146 | 64.8 | 48.6 | 97.2 | 405 | 243 |
| 150 | 15.8 | 151 | 66.8 | 50.2 | 100.3 | 418 | 251 |
| 250 | 12.1 | 139 | 61.7 | 46.3 | 92.7 | 386 | 232 |
| 325 | 9.3 | 124 | 55.0 | 41.4 | 82.6 | 344 | 207 |
| 300 | 10.2 | 129 | 57.0 | 42.9 | 85.7 | 357 | 214 |
| 350 | 8.4 | 120 | 53.4 | 40.0 | 80.0 | 334 | 200 |
| 400 | 6.5 | 104 | 46.3 | 34.7 | 69.4 | 290 | 174 |
| 500 | 2.8 | 34.7 | 15.4 | 11.6 | 23.2 | 96.5 | 57.9 |
| 375 | 7.4 | 114 | 50.4 | 37.8 | 75.7 | 315 | 189 |
| 450 | 4.6 | 69.0 | 30.7 | 23.0 | 46.0 | 192 | 115 |
| 425 | 5.5 | 86.3 | 38.4 | 28.8 | 57.5 | 240 | 144 |
| 475 | 3.7 | 51.3 | 22.8 | 17.1 | 34.2 | 142 | 85.4 |
| 538 | 1.4 | 17.7 | 7.9 | 5.9 | 11.8 | 49.2 | 29.5 |
Exotic Flanges Standards
Raised Face vs Flat Face flange
Flange face design affects how the gasket seats and seals. Raised Face (RF) and Flat Face (FF) are the two main types, each suited to different gasket materials and operating conditions
Raised Face (RF)
- Face raised 1.6 mm or 6.4 mm
- Gasket sits inside bolt circle only
- Uses spiral wound / metallic / ring gasket
- Handles Class 150 up to Class 2500
- Temp range up to 538°C
- Higher unit bolt stress - better sealing
- For steel / SS / alloy flanges only
- ARAMCO & SABIC default standard in KSA
- Surface finish 125-250 µin AARH (serrated)
Flat Face (FF)
- Face flush with flange body - no raised ring
- Full-face gasket covers entire flange face
- Uses soft full-face gasket (rubber / PTFE)
- Limited to Class 150 & 300 only
- Temp range up to 260°C (typical)
- Lower unit bolt stress - distributed load
- For cast iron / FRP / non-metallic flanges
- Special cases only - pumps, compressors, CI valves
- Surface finish 125-250 µin AARH (smooth)
Standard Flange Sizes
Standard flange sizes follow ANSI B16.5 and BS 10 conventions, making sourcing easy and parts interchangeable across Flanges suppliers worldwide. Common sizes : 3/4", 1", 1.5", 2", 3", 4", and 6" are widely stocked and readily available from verified warehouses in Saudi Arabia.
Standard & class reference
View Size Chart –¼Standard & class reference
View Size Chart –¼Standard & class reference
View Size Chart –¼Standard & class reference
View Size Chart –¼Standard & class reference
View Size Chart –¼Standard & class reference
View Size Chart –¼15 mm (½") Flange Size Chart
| Standard | OD (mm) | Class | Bolt Circle ˜ (mm) | Bolt Size | No. of Bolts | Bolt Hole ˜ (mm) |
|---|---|---|---|---|---|---|
| ISO 7005 (DIN) | 80 | PN6 | 55 | M10 | 4 | 11 |
| 95 | PN10 | 65 | M12 | 4 | 14 | |
| 95 | PN16 | 65 | M12 | 4 | 14 | |
| 90 | PN20 | 60.5 | M14 | 4 | 16 | |
| 95 | PN25 | 65 | M12 | 4 | 14 | |
| 95 | PN40 | 65 | M12 | 4 | 14 | |
| AS 2129 | 95 | Table C | 67 | M12 | 4 | 14 |
| 95 | Table D | 67 | M12 | 4 | 14 | |
| 95 | Table E | 67 | M12 | 4 | 14 | |
| 95 | Table F | 67 | M12 | 4 | 14 | |
| 114 | Table H | 83 | M16 | 4 | 17 | |
| 114 | Table J | 83 | M16 | 4 | 17 | |
| AS 4087 | 95 | PN14 | 67 | M12 | 4 | 14 |
| ANSI B16.5 | 89 | ANSI 150 | 60 | ½" | 4 | 16 |
| 95 | ANSI 300 | 67 | ½" | 4 | 16 | |
| 95 | ANSI 600 | 67 | ½" | 4 | 16 | |
| 121 | ANSI 900 | 83 | ¾" | 4 | 22 | |
| 121 | ANSI 1500 | 83 | ¾" | 4 | 22 |
20 mm (¾") Flange Size Chart
| Standard | OD (mm) | Class | Bolt Hole ˜ (mm) | No. of Bolts | Bolt Circle ˜ (mm) | Bolt Size |
|---|---|---|---|---|---|---|
| AS 2129 | 100 | Table C | 14 | 4 | 73 | M12 |
| 100 | Table D | 14 | 4 | 73 | M12 | |
| 100 | Table E | 14 | 4 | 73 | M12 | |
| 100 | Table F | 14 | 4 | 73 | M12 | |
| 115 | Table H | 18 | 4 | 83 | M12 | |
| 115 | Table J | 18 | 4 | 83 | M12 | |
| AS 4087 | 100 | PN14 | 14 | 4 | 73 | M12 |
| ISO 7005 (DIN) | 90 | PN6 | 11 | 4 | 65 | M10 |
| 105 | PN10 | 14 | 4 | 75 | M12 | |
| 105 | PN16 | 14 | 4 | 75 | M12 | |
| 100 | PN20 | 16 | 4 | 70 | M14 | |
| 105 | PN25 | 14 | 4 | 75 | M12 | |
| 105 | PN40 | 14 | 4 | 75 | M12 | |
| ANSI B16.5 | 98 | ANSI 150 | 16 | 4 | 70 | ½" |
| 117 | ANSI 300 | 19 | 4 | 83 | …" | |
| 117 | ANSI 600 | 19 | 4 | 83 | …" | |
| 130 | ANSI 900 | 22 | 4 | 89 | ¾" | |
| 130 | ANSI 1500 | 22 | 4 | 89 | ¾" |
25 mm (1") Flange Size Chart
| Standard | OD (mm) | Class | Bolt Hole ˜ (mm) | No. of Bolts | Bolt Circle ˜ (mm) | Bolt Size |
|---|---|---|---|---|---|---|
| ISO 7005 (DIN) | 100 | PN6 | 11 | 4 | 78 | M10 |
| 115 | PN10 | 14 | 4 | 85 | M12 | |
| 115 | PN16 | 14 | 4 | 85 | M12 | |
| 110 | PN20 | 16 | 4 | 79.5 | M14 | |
| 115 | PN25 | 14 | 4 | 85 | M12 | |
| 115 | PN40 | 14 | 4 | 85 | M12 | |
| AS 2129 | 115 | Table C | 14 | 4 | 83 | M12 |
| 115 | Table D | 14 | 4 | 83 | M12 | |
| 115 | Table E | 14 | 4 | 83 | M12 | |
| 120 | Table F | 18 | 4 | 87 | M16 | |
| 120 | Table H | 18 | 4 | 87 | M16 | |
| 120 | Table J | 18 | 4 | 87 | M16 | |
| AS 4087 | 115 | PN14 | 14 | 4 | 83 | M12 |
| ANSI B16.5 | 110 | ANSI 150 | 16 | 4 | 79 | ½" |
| 125 | ANSI 300 | 19 | 4 | 89 | …" | |
| 125 | ANSI 600 | 19 | 4 | 89 | …" | |
| - | ANSI 900 | 25 | 4 | 102 | …ž" | |
| - | ANSI 1500 | 25 | 4 | 102 | …ž" |
32 mm (1¼") Flange Size Chart
| Standard | Class | Bolt Circle ˜ (mm) | OD (mm) | No. of Bolts | Bolt Hole ˜ (mm) | Bolt Size |
|---|---|---|---|---|---|---|
| ANSI B16.5 | ANSI 150 | 89 | 117 | 4 | 16 | ½" |
| ANSI 300 | 98 | 133 | 4 | 19 | …" | |
| ANSI 600 | 98 | 133 | 4 | 19 | …" | |
| ANSI 900 | 111 | 159 | 4 | 25 | …ž" | |
| ANSI 1500 | 111 | 159 | 4 | 25 | …ž" | |
| AS 2129 | Table C | 87 | 120 | 4 | 14 | M12 |
| Table D | 87 | 120 | 4 | 14 | M12 | |
| Table E | 87 | 120 | 4 | 14 | M12 | |
| Table F | 98 | 135 | 4 | 18 | M16 | |
| Table H | 98 | 135 | 4 | 18 | M16 | |
| Table J | 98 | 135 | 4 | 18 | M16 | |
| AS 4087 | PN14 | 87 | 120 | 4 | 14 | M12 |
| ISO 7005 (DIN) | PN6 | 90 | 120 | 4 | 14 | M12 |
| PN10 | 100 | 140 | 4 | 18 | M16 | |
| PN16 | 100 | 140 | 4 | 18 | M16 | |
| PN20 | 89 | 120 | 4 | 16 | M14 | |
| PN25 | 100 | 140 | 4 | 18 | M16 | |
| PN40 | 100 | 140 | 4 | 18 | M16 |
40 mm (1½") Flange Size Chart
| Standard | OD (mm) | Class | No. of Bolts | Bolt Hole ˜ (mm) | Bolt Circle ˜ (mm) | Bolt Size |
|---|---|---|---|---|---|---|
| ANSI B16.5 | 127 | ANSI 150 | 4 | 16 | 98 | ½" |
| 156 | ANSI 300 | 4 | 22 | 114 | ¾" | |
| 156 | ANSI 600 | 4 | 22 | 114 | ¾" | |
| 178 | ANSI 900 | 4 | 29 | 124 | 1" | |
| 178 | ANSI 1500 | 4 | 29 | 124 | 1" | |
| AS 2129 | 135 | Table C | 4 | 14 | 98 | M12 |
| 135 | Table D | 4 | 14 | 98 | M12 | |
| 135 | Table E | 4 | 14 | 98 | M12 | |
| 140 | Table F | 4 | 18 | 105 | M16 | |
| 140 | Table H | 4 | 18 | 105 | M16 | |
| 140 | Table J | 4 | 18 | 105 | M16 | |
| AS 4087 | 135 | PN14 | 4 | 14 | 98 | M12 |
| ISO 7005 (DIN) | 130 | PN6 | 4 | 14 | 100 | M12 |
| 150 | PN10 | 4 | 18 | 110 | M16 | |
| 150 | PN16 | 4 | 18 | 110 | M16 | |
| 130 | PN20 | 4 | 16 | 98.5 | M14 | |
| 150 | PN25 | 4 | 18 | 110 | M16 | |
| 150 | PN40 | 4 | 18 | 110 | M16 |
50 mm (2") Flange Size Chart
| Standard | OD (mm) | Class | No. of Bolts | Bolt Circle ˜ (mm) | Bolt Hole ˜ (mm) | Bolt Size |
|---|---|---|---|---|---|---|
| ANSI B16.5 | 152 | ANSI 150 | 4 | 121 | 19 | …" |
| 165 | ANSI 300 | 8 | 127 | 19 | …" | |
| 165 | ANSI 600 | 8 | 127 | 19 | …" | |
| 216 | ANSI 900 | 8 | 165 | 25 | …ž" | |
| 216 | ANSI 1500 | 8 | 165 | 25 | …ž" | |
| AS 2129 | 150 | Table C | 4 | 114 | 18 | M16 |
| 150 | Table D | 4 | 114 | 18 | M16 | |
| 150 | Table E | 4 | 114 | 18 | M16 | |
| 165 | Table F | 4 | 127 | 18 | M16 | |
| 165 | Table H | 4 | 127 | 18 | M16 | |
| 165 | Table J | 4 | 127 | 22 | M20 | |
| AS 4087 | 150 | PN14 | 4 | 114 | 18 | M16 |
| 150 | PN16 | 4 | 114 | 18 | M16 | |
| 165 | PN21 | 4 | 127 | 18 | M16 | |
| 165 | PN35 | 4 | 127 | 18 | M16 | |
| ISO 7005 (DIN) | 140 | PN6 | 4 | 110 | 14 | M12 |
| 165 | PN10 | 4 | 125 | 18 | M16 | |
| 165 | PN16 | 4 | 125 | 18 | M16 | |
| 150 | PN20 | 4 | 120.5 | 18 | M16 | |
| 165 | PN25 | 4 | 125 | 18 | M16 | |
| 165 | PN40 | 4 | 125 | 18 | M16 |
SAE Flange Standards for Hydraulic Systems
SAE flange standards are used for hydraulic connections in agricultural, construction, and mobile equipment. These compact, high-pressure flanges are quite different from ANSI B16.5 flanges and require specific knowledge for correct selection and installation.
Standard
SAE J518 / ISO 6162Size Range
3/8" to 5"Series
3000 psi & 6000 psiBolts
4-Bolt PatternSeal Type
O-Ring Face SealMaterial
CS ST52.3 / SS316L
EN 1092-1 European Flange Specifications
EN 1092-1 is the European standard for industrial flanges, widely used across Europe, Asia, and other regions following international codes. Knowing the dimensional differences between EN and ANSI standards helps avoid costly errors when integrating systems across multinational petrochemical projects.
| EN Standard | Size | Types |
|---|---|---|
| EN 1092-1 | 3/8 to 80 inch | Slip on, Socket Weld, Weld Neck, Plate, Blind |
| EN 1092-1 TYPE 01 | DN12 To DN4000 | Plate Flange |
| EN 1092-1 TYPE 11 | DN12 To DN4000 | Weld Neck Flange |
| EN 1092-2 | 3/8 to 80 inch | Slip on, Socket Weld, Weld Neck, Plate, Blind |
| EN 1092-1 TYPE 02 | DN12 To DN1400 | Loose Plate Flange |
| EN 1092-1 TYPE 05 | DN12 To DN4000 | Blind Flange |
| EN 1092-1 TYPE 13 | DN12 To DN200 | Threaded flange |
DIN Flanges for Precision Engineering
DIN standards from Germany define flange dimensions with high precision. Many German equipment manufacturers use DIN flanges exclusively, so specialized sourcing is needed to integrate them with German-designed equipment used across Middle Eastern industrial facilities.
| Standard | Pressure | Types |
|---|---|---|
| DIN 2632 | PN10 | Welding Neck Flanges |
| DIN 2635 | PN40 | Welding Neck Flanges |
| DIN 2527 | PN6, PN10, PN16, PN25, PN40, PN64, PN100 | Blind Flange |
| DIN 2642 | PN10 | Loose Flange |
| DIN 2501 | PN10 | Plate Flange |
| DIN 2633 | PN16 | Welding Neck Flanges |
| DIN 2561 | PN10 and PN16 | Oval Threaded Flange |
Get Quotes From Verified Flange Suppliers in Saudi Arabia
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Send Your Flange RFQ Now - Response Within 4 HoursFlange Bolting Chart
Correct bolting is key to keeping a flange's seal intact. The bolt material, size, and tightness directly affect sealing performance and reliability. Using wrong or under-sized bolts is a common cause of flange leaks and serious failures.
| Class | Nominal Pipe Size (Inches) | RF Height | 1/2 | 3/4 | 1 | 1 1/4 | 1 1/2 | 2 | 2 1/2 | 3 | 3 1/2 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Class 150 | Number of Bolts | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 8 | 8 | 8 | 8 | 8 | 12 | 12 | 12 | 16 | 16 | 20 | 20 | |
| Diameter of Bolt | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 | 5/8 | 5/8 | 5/8 | 5/8 | 5/8 | 3/4 | 3/4 | 3/4 | 7/8 | 7/8 | 1 | 1 | 1 1/8 | 1 1/8 | 1 1/4 | ||
| Stud Bolt Length | 0.06 | 2 1/4 | 2 1/2 | 2 1/2 | 2 3/4 | 2 3/4 | 3 1/4 | 3 1/2 | 3 1/2 | 3 1/2 | 3 1/2 | 3 3/4 | 4 | 4 1/4 | 4 1/2 | 4 3/4 | 5 1/4 | 5 1/4 | 5 3/4 | 6 1/4 | 6 3/4 | |
| Machine Bolt Length | 0.06 | 2 | 2 | 2 1/4 | 2 1/4 | 2 1/2 | 2 3/4 | 3 | 3 | 3 | 3 | 3 1/4 | 3 1/4 | 3 1/2 | 4 | 4 | 4 1/2 | 4 1/2 | 5 | 5 1/2 | 6 | |
| Class 300 | Machine Bolt Length | 0.06 | 2 1/4 | 2 1/2 | 2 1/2 | 2 3/4 | 3 | 3 | 3 1/4 | 3 1/2 | 3 3/4 | 3 3/4 | 4 1/4 | 4 1/4 | 4 3/4 | 5 1/2 | 5 3/4 | 6 1/4 | 6 1/2 | 6 3/4 | 7 1/4 | 8 |
| Diameter of Bolt | 1/2 | 5/8 | 5/8 | 5/8 | 3/4 | 5/8 | 3/4 | 3/4 | 3/4 | 3/4 | 3/4 | 3/4 | 7/8 | 1 | 1 1/8 | 1 1/8 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/2 | ||
| Number of Bolts | 4 | 4 | 4 | 4 | 4 | 8 | 8 | 8 | 8 | 8 | 8 | 12 | 12 | 16 | 16 | 20 | 20 | 24 | 24 | 24 | ||
| Stud Bolt Length | 0.06 | 2 1/2 | 3 | 3 | 3 1/4 | 3 1/2 | 3 1/2 | 4 | 4 1/4 | 4 1/4 | 4 1/4 | 4 3/4 | 4 3/4 | 5 1/2 | 6 1/4 | 6 3/4 | 7 | 7 1/2 | 7 3/4 | 8 | 9 | |
| Class 400 | Number of Bolts | 4 | 4 | 4 | 4 | 4 | 8 | 8 | 8 | 8 | 8 | 8 | 12 | 12 | 16 | 16 | 20 | 20 | 24 | 24 | 24 | |
| Diameter of Bolt | 1/2 | 5/8 | 5/8 | 5/8 | 3/4 | 5/8 | 3/4 | 3/4 | 7/8 | 7/8 | 7/8 | 7/8 | 1 | 1 1/8 | 1 1/4 | 1 1/4 | 1 3/8 | 1 3/8 | 1 1/2 | 1 3/4 | ||
| Stud Bolt Length | 1/4 | 3 | 3 1/2 | 3 1/2 | 3 3/4 | 4 1/4 | 4 1/4 | 4 3/4 | 5 | 5 1/2 | 5 1/2 | 5 3/4 | 6 | 6 3/4 | 7 1/2 | 8 | 8 1/4 | 8 3/4 | 9 | 9 1/2 | 10 1/2 | |
| Class 600 | Number of Bolts | 4 | 4 | 4 | 4 | 4 | 8 | 8 | 8 | 8 | 8 | 8 | 12 | 12 | 16 | 20 | 20 | 20 | 20 | 24 | 24 | |
| Diameter of Bolt | 1/2 | 5/8 | 5/8 | 5/8 | 3/4 | 5/8 | 3/4 | 3/4 | 7/8 | 7/8 | 1 | 1 | 1 1/8 | 1 1/4 | 1 1/4 | 1 3/8 | 1 1/2 | 1 5/8 | 1 5/8 | 1 7/8 | ||
| Stud Bolt Length | 1/4 | 3 | 3 1/2 | 3 1/2 | 3 3/4 | 4 1/4 | 4 1/4 | 4 3/4 | 5 | 5 1/2 | 5 3/4 | 6 1/2 | 6 3/4 | 7 1/2 | 8 1/2 | 8 3/4 | 9 1/4 | 10 | 10 3/4 | 11 1/4 | 13 | |
| Class 900 | Number of Bolts | 4 | 4 | 4 | 4 | 4 | 8 | 8 | 8 | - | 8 | 8 | 12 | 12 | 16 | 20 | 20 | 20 | 20 | 20 | 20 | |
| Diameter of Bolts | 1/2 | 5/8 | 5/8 | 5/8 | 3/4 | 5/8 | 3/4 | 7/8 | - | 1 1/8 | 1 1/4 | 1 1/8 | 1 3/8 | 1 3/8 | 1 3/8 | 1 1/2 | 1 5/8 | 1 7/8 | 2 | 2 1/2 | ||
| Stud Bolt Length | 1/4 | 3 | 3 1/2 | 3 1/2 | 3 3/4 | 4 1/4 | 4 1/4 | 4 3/4 | 5.75 | - | 6.75 | 7.50 | 7.50 | 8.75 | 9.25 | 10.00 | 10.75 | 11.25 | 12.75 | 13.75 | 17.25 | |
| Class 1500 | Number of Bolts | 4 | 4 | 4 | 4 | 4 | 8 | 8 | 8 | - | 8 | 8 | 12 | 12 | 12 | 16 | 16 | 16 | 16 | 16 | 16 | |
| Diameter of Bolts | 3/4 | 3/4 | 7/8 | 7/8 | 1 | 7/8 | 1 | 1 1/8 | - | 1 1/4 | 1 1/2 | 1 3/8 | 1 5/8 | 1 7/8 | 2 | 2 1/4 | 2 1/2 | 2 3/4 | 3 | 3 1/2 | ||
| Stud Bolt Length | 1/4 | 4.25 | 4.50 | 5.00 | 5.00 | 5.50 | 5.75 | 6.25 | 7.00 | - | 7.75 | 9.75 | 10.25 | 11.50 | 13.25 | 14.75 | 16.00 | 17.50 | 19.50 | 21.25 | 24.25 | |
| Class 2500 | Number of Bolts | 4 | 4 | 4 | 4 | 4 | 8 | 8 | 8 | - | 8 | 8 | 8 | 12 | 12 | 12 | - | - | - | - | - | |
| Diameter of Bolts | 3/4 | 3/4 | 7/8 | 1 | 1 1/8 | 1 | 1 1/8 | 1 1/4 | - | 1 1/2 | 1 3/4 | 2 | 2 1/2 | 2 3/4 | - | - | - | - | - | - | ||
| Stud Bolt Length | 1/4 | 4.75 | 5.00 | 5.50 | 6.00 | 6.75 | 7.00 | 7.75 | 8.75 | - | 10.00 | 11.75 | 13.50 | 15.00 | 19.25 | 21.25 | - | - | - | - | - |
Industrial Flanges Hydrostatic Testing Process Flow
Hydrostatic testing is the standard method for verifying that a flange meets its pressure rating. It involves applying pressurized water to the flange and checking for leaks or deformation, confirming it performs to specification.
● Hydrostatic Testing Process Flow
Installation Guide for Steel Flange
Correct flange installation is key to system reliability and lifespan. Most flange failures and leaks happen due to poor assembly, wrong gasket choice, or incorrect bolt torque. Following proper installation steps helps prevent downtime and ensures ARAMCO-compliant operation.
Critical Installation Steps
Flange Facing Machining Tolerance
| Feature | Requirement | Standard Reference |
|---|---|---|
| Bore Concentricity | ≤ 0.2 mm | Internal QC Spec |
| Surface Roughness | Ra 3.2–6.3 μm | ASME B46.1 |
| Face Flatness | ≤ 0.13 mm | ASME B16.5 |
| Bolt Hole Positional Tolerance | ±0.5 mm | Customer Drawing / EN 1092 |
Corrosion Resistance in ISO Flange Selection
Coastal areas like Al Khobar and Dammam face harsh corrosion from salty air and water. Choosing flange materials with strong corrosion resistance helps avoid early damage, extends service life, and keeps systems safe throughout their design life
| Material / Grade | High Temp | Seawater | General Corrosion | Pitting | Crevice | H‚‚S / Sour |
|---|---|---|---|---|---|---|
| A105 Carbon Steel | Up to 425°C | Not suitable | Poor | Poor | Poor | NACE req. |
| F304 SS | Up to 870°C | Not suitable | Good | Moderate | Moderate | Poor |
| F316L SS | Up to 870°C | Low Cl» only | Very Good | Good | Good | Limited |
| F11 / F22 Alloy | Up to 650°C | Not suitable | Moderate | Poor | Poor | With NACE |
| F51 Duplex 2205 | Up to 300°C | Good | Excellent | Excellent | Excellent | Good |
| F53 Super Duplex 2507 | Up to 260°C | Excellent | Excellent | Excellent | Excellent | Excellent |
| Inconel 625 | Up to 980°C | Excellent | Excellent | Excellent | Excellent | Excellent |
Petrochemical Flanges Bulk Purchasing Strategies
Bulk Consolidation
Single shipment vs. multiple small orders
Grade Standardization
One grade across all project applications
Volume Discount
5-15% off for 500+ pcs or 5 MT+ orders
Local Sourcing
Al Khobar · Dammam · Jubail approved suppliers
JIT Inventory
Reduces carrying cost & warehouse overhead
How to Order High Yield Flanges in KSA?
Unit cost · Bulk discount (5-15% for 500+ pcs) · Freight DDP vs FOB · Total project spend across all suppliers
Delivery terms · Staging schedule · Warehouse requirements
Physical check · Damage assessment · Spec compliance verification · Heat number cross-check with MTC
- Match heat number on flange with EN 10204 3.1 MTC
- Verify face type - RF / RTJ / FF as per PO
- Check surface finish & dimension against ASME B16.5
- Zero visible defects - reject & raise NCR if found
Retain all certificates, test reports & purchase records for regulatory & ARAMCO audit compliance
- MTC EN 10204 3.1 - per heat / lot retained
- Hydrostatic / pressure test report - filed per item
- Purchase order & delivery note - archived 10 years
- Third-party inspection release note - SGS / Intertek
Corrosion Resistant Flange Applications
Industrial flanges play a vital role across the oil & gas value chain from upstream exploration to downstream refining and distribution. Each stage has different temperature, pressure, and performance demands, requiring careful material and design selection.
Recent Flange Supply Projects - KSA & Worldwide
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