Loose Flanges are designed for flexibility, ease of installation, and dependable performance in industrial piping systems where alignment and maintenance efficiency matter most. Unlike fixed flanges, loose flanges rotate freely around the pipe, allowing precise bolt alignment and faster assembly without stressing the pipeline. Manufactured to deliver reliable sealing and structural support, they provide secure, leak-free connections while simplifying handling and installation. Widely trusted in chemical processing, petrochemical, water treatment, and industrial utility systems, Loose Flanges stand strong where adaptability, efficiency, and operational reliability are essential for smooth, uninterrupted pipeline performance worldwide today.
Loose Flanges are typically constructed using high-grade materials like carbon steel, stainless steel, or steel alloys to increase their strength and wear Some possess mechanical properties and high tensile strength, weld good, and are resistant to overheating and pressure. Flexible flanges have numerous benefits, such as being readily installed and removed without welding, which makes them most appropriate for maintenance or temporary application Provides flexibility, minimizes downtime, and enhances overall efficiency of pipeline systems. Flexible flanges are also affordable and can be tailored to meet specific project specifications.
| Size | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
|---|---|
| Standards | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| Pressure Rating ANSI | Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 |
| Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
| UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
| EN | 6Bar 10Bar 16Bar 25Bar 40Bar |
| Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Production Technique | Forged, Heat treated and machined |
| Connect Type/ Flange Face Type | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF) |
| Special design | As per your drawing AS, ANSI, BS, DIN and JIS 15 NB (1/2″) to 200 NB (8″) Equal and Reducing Configurations |
| Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
| Material | Incoloy Loose Flange, Brass Loose Flange, SMO 254 Loose Flange, AISI 4130 Loose Flange, Alloy 20 Loose Flange, Stainless Steel Loose Flange, Duplex Steel Loose Flange, Copper Nickel Loose Flange, Titanium Loose Flange, Hastelloy Loose Flange, Inconel Loose Flange, Super Duplex Loose Flange, Monel Loose Flange, Nickel Alloy Loose Flange. |
| Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 | |
Faizan Flanges, a leading supplier in Doha, Qatar, offers an extensive selection of Loose Flanges, including weld neck flanges, slip-on flanges, blind flanges, threaded flanges, and lap joint flanges. Designed for diverse industrial applications, our high-quality inventory and commitment to exceptional service make us a trusted choice for flange products in the region.
Loose flanges or lap joint flanges are employed for use in piping systems that need to be dismantled frequently for inspection, cleaning, or maintenance. They can be employed for low-pressure and non-critical applications like water treatment plants, food process, and chemical industries. Loose flanges are employed with stub ends, facilitating easy assembly after welding, easy rotation, and easy alignment, making the assembly process simple and minimizing labor cost. Their misalignment capability renders them a convenient option in systems where pipe position flexibility is a requirement.
| Nominal Bore | Dia. (D) | Thick. (E) | Dia. (B) | Dia. (A) | Height (H) | Nbr | Holes | Dia. (C) |
|---|---|---|---|---|---|---|---|---|
| 1/2″ | 95 | 14.3 | 38 | 22.9 | 22 | 4 | 15.87 | 66.7 |
| 3/4″ | 115 | 15.9 | 48 | 28.2 | 25 | 4 | 19.05 | 82.6 |
| 1″ | 125 | 17.5 | 54 | 34.9 | 27 | 4 | 19.05 | 88.9 |
| 1 1/4″ | 135 | 19.1 | 64 | 43.7 | 27 | 4 | 19.05 | 98.4 |
| 1 1/2″ | 155 | 20.7 | 70 | 50.0 | 30 | 4 | 22.22 | 114.3 |
| 2″ | 165 | 22.3 | 84 | 62.5 | 33 | 8 | 19.05 | 127.0 |
| 2 1/2″ | 190 | 25.4 | 100 | 75.4 | 38 | 8 | 22.22 | 149.2 |
| 3″ | 210 | 28.6 | 117 | 91.4 | 43 | 8 | 22.22 | 168.3 |
| 3 1/2″ | 230 | 30.2 | 133 | 104.1 | 44 | 8 | 22.22 | 184.2 |
| 4″ | 255 | 31.8 | 146 | 116.8 | 48 | 8 | 22.22 | 200.0 |
| 5″ | 280 | 35.0 | 178 | 144.4 | 51 | 8 | 22.22 | 235.0 |
| 6″ | 320 | 36.6 | 206 | 171.4 | 52 | 12 | 22.22 | 269.9 |
| 8″ | 380 | 41.3 | 260 | 222.2 | 62 | 12 | 25.40 | 330.2 |
| 10″ | 445 | 47.7 | 321 | 277.4 | 95 | 16 | 28.57 | 387.4 |
| 12″ | 520 | 50.8 | 375 | 328.2 | 102 | 16 | 31.75 | 450.8 |
| 14″ | 585 | 54.0 | 425 | 360.2 | 111 | 20 | 31.75 | 514.4 |
| 16″ | 650 | 57.2 | 483 | 411.2 | 121 | 20 | 34.29 | 571.5 |
| 18″ | 710 | 60.4 | 533 | 462.3 | 130 | 24 | 34.29 | 628.6 |
| 20″ | 775 | 63.5 | 587 | 514.4 | 140 | 24 | 34.29 | 685.8 |
| 24″ | 915 | 69.9 | 702 | 616.0 | 152 | 24 | 41.27 | 812.8 |
| Pipe Size | 150 # | 300 # | 600 # | 900 # | 1500 # | 2500 # | ||||||||||||
| WN | SO | BLD | WN | SO | BLD | WN | SO | BLD | WN | SO | BLD | WN | SO | BLD | WN | SO | BLD | |
| 1/2″ | 2 | 1 | 1 | 2 | 1 | 1 | 2 | 2 | 2 | SEE 1500 # WEIGHTS | 5 | 4 | 4 | 7 | 7 | 7 | ||
| 3/4″ | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 3 | 3 | SEE 1500 # WEIGHTS | 6 | 5 | 6 | 8 | 8 | 8 | ||
| 1″ | 3 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | SEE 1500 # WEIGHTS | 9 | 8 | 8 | 12 | 11 | 11 | ||
| 1 1/2″ | 4 | 3 | 3 | 7 | 6 | 6 | 8 | 7 | 8 | SEE 1500 # WEIGHTS | 13 | 12 | 13 | 25 | 22 | 23 | ||
| 2″ | 6 | 5 | 5 | 9 | 7 | 8 | 12 | 9 | 10 | SEE 1500 # WEIGHTS | 25 | 25 | 25 | 42 | 37 | 39 | ||
| 2 1/2″ | 8 | 7 | 7 | 12 | 10 | 12 | 18 | 13 | 15 | SEE 1500 # WEIGHTS | 36 | 36 | 35 | 52 | 55 | 56 | ||
| 3″ | 10 | 8 | 9 | 15 | 13 | 16 | 23 | 16 | 20 | 31 | 26 | 29 | 48 | 48 | 48 | 94 | 83 | 86 |
| 4″ | 15 | 13 | 17 | 25 | 22 | 27 | 42 | 37 | 41 | 53 | 53 | 54 | 73 | 73 | 73 | 145 | 125 | 130 |
| 5″ | 19 | 15 | 20 | 32 | 28 | 35 | 68 | 63 | 68 | 86 | 83 | 87 | 130 | 130 | 140 | 245 | 210 | 225 |
| 6″ | 24 | 19 | 26 | 42 | 39 | 50 | 81 | 80 | 86 | 110 | 110 | 115 | 165 | 165 | 160 | 380 | 325 | 345 |
| 8″ | 39 | 30 | 45 | 67 | 58 | 81 | 120 | 115 | 140 | 175 | 170 | 200 | 275 | 260 | 300 | 580 | 485 | 530 |
| 10″ | 52 | 43 | 70 | 91 | 81 | 124 | 190 | 170 | 230 | 260 | 245 | 290 | 455 | 435 | 510 | 1075 | 930 | 1025 |
| 12″ | 80 | 64 | 110 | 140 | 115 | 185 | 225 | 200 | 295 | 325 | 325 | 415 | 690 | 580 | 690 | 1525 | 1100 | 1300 |
| 14″ | 110 | 90 | 140 | 180 | 165 | 250 | 280 | 230 | 355 | 400 | 400 | 520 | 940 | NA | 975 | NA | NA | NA |
| 16″ | 140 | 98 | 180 | 250 | 190 | 295 | 390 | 330 | 495 | 495 | 425 | 600 | 1250 | NA | 1300 | NA | NA | NA |
| 18″ | 150 | 130 | 220 | 320 | 250 | 395 | 475 | 400 | 630 | 680 | 600 | 850 | 1625 | NA | 1750 | NA | NA | NA |
| 20″ | 180 | 165 | 285 | 400 | 315 | 505 | 590 | 510 | 810 | 830 | 730 | 1075 | 2050 | NA | 2225 | NA | NA | NA |
| 22″ | 225 | 185 | 355 | 465 | 370 | 640 | 720 | 590 | 1000 | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 24″ | 260 | 220 | 430 | 580 | 475 | 790 | 830 | 730 | 1250 | 1500 | 1400 | 2025 | 3325 | NA | 3625 | NA | NA | NA |
Yes, we offer custom sizes for Loose Flanges to meet specific project needs. Our team at Faizan Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@faizanflanges.com.
We are renowned for delivering products with precise, accurate dimensions. Each product undergoes thorough testing, both destructive and non-destructive, to ensure quality before being shipped to our customers.
Our team is ready to assist you. Contact us for any queries or personalized solutions.
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