Leading Manufacturer & Exporter of
Carbon Steel Flanges to Bangladesh
Werner Flanges stands as Bangladesh's most trusted carbon steel flanges distributor, delivering premium-grade ASTM A105 and A350 LF2 flanges to industries across Dhaka, Chittagong, Narayanganj, Khulna, and Sylhet. With over two decades of manufacturing excellence and direct factory pricing, we supply carbon steel flanges that meet the demanding requirements of Bangladesh's rapidly growing power generation, textile, pharmaceutical, garment manufacturing, and infrastructure sectors.
Our carbon steel flanges comply with international standards including ASME B16.5, ASTM specifications, DIN, and BS standards, making them ideal for applications in Bangladesh Petroleum Corporation (BPC) facilities, Summit Power plants, BPDB power stations, and major industrial zones across Chattogram and Mongla ports. We manufacture carbon steel flanges in all pressure classes from 150# to 2500# and sizes ranging from ½” to 60″, ensuring comprehensive coverage for every industrial application in Bangladesh.
With Bangladesh’s ambitious industrial growth targets and increasing focus on energy security through LNG imports and power sector expansion, the demand for reliable, high-performance piping components has never been greater. Werner Flanges supports this growth by providing engineered weld neck flanges that deliver superior mechanical strength, leak-proof connections, and long-term reliability in high-pressure, high-temperature applications critical to Bangladesh’s industrial success.
Carbon steel flanges are mechanical components manufactured from carbon steel alloys, primarily used to connect pipes, valves, pumps, and other equipment in piping systems. These flanges create a bolted joint that allows for easy assembly, disassembly, and maintenance while maintaining pressure integrity and leak-proof connections.
Carbon steel flanges derive their strength from the carbon content in the steel alloy, typically ranging from 0.05% to 2.0% carbon. The most common grade, ASTM A105, contains approximately 0.35% carbon, providing an excellent balance of strength, weldability, and machinability. This makes carbon steel flanges the most economical choice for general-purpose applications in temperatures ranging from -29°C to 427°C.
Specifications
| Specification | Details |
|---|---|
| Pressure Rating | Class 150 to Class 2500 |
| Flange Type | Plate Flange |
| Facing Type | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
| Size Range | ½” to 24” (DN 15 to DN 600) |
| Temperature Range | -29°C to +593°C (Depending on Material & Pressure Class) |
| Applications | Oil & Gas, Petrochemical, Power Generation, Water Treatment, Marine & Industrial Sectors |
| Manufacturing Process | Forged / Machined |
| Certification | EN 10204 3.1 / 3.2, IBR, NACE MR0175 / ISO 15156 (as applicable) |
Matel and Grade
| Type of Materials | Common Specifications / Customization Available on Request |
|---|---|
| Duplex Steel | ASTM/ASME A182 F51, F60, F61, UNS S31803, UNS S32205 |
| Super Duplex Steel | ASTM/ASME A182 F53, F55, UNS S32750, UNS S32760, F44 (6Mo) |
| Stainless Steel | ASTM/ASME A182 F304, F304L, F316, F316L, F310, F317L, F321, F347 |
| Carbon Steel | ASTM A105, A350 LF1, LF2, LF3, A266 Class 1/2, A694 F42 to F70, A765 Gr. II |
| Alloy Steel | ASTM/ASME A182 F1, F5, F9, F11, F12, F22 |
| Non-Ferrous Alloys | Titanium, Brass, Admiralty Brass, Copper Nickel, Nickel Alloys, Hastelloy |
| Titanium | ASTM/ASME B381 Gr.1, Gr.2, Gr.5, Gr.7, Gr.12, Gr.16 |
| Copper Nickel | ASTM B151 UNS C70600 (Cu-Ni 90/10), C71500 (Cu-Ni 70/30) |
| Brass, Al-Brass | ASTM B152 UNS C26000, C27200, C28000; ASTM B111 for Al-Brass |
| Nickel Alloys | ASTM B160, B161, B564 – UNS N02200, N02201, N04400, N08800, N08825, N06600, N06601, N06625, Monel K500 |
| Alloy 20 | ASTM B462 UNS N08020 |
| Hastelloy | ASTM B564 UNS N10276 (Hastelloy C276), N06022 (Hastelloy C22) |
| Cladded Materials | ASTM B898, B265, B424 or custom explosion/clad bonding using dissimilar metals |
| Titanium-Steel, Nickel-Steel, Titanium-Copper, Stainless Steel-Carbon Steel, Bimetallic/Trimetallic Combinations |
Types of Flanges
| Slip On Flanges | Weld Neck Flanges | Blind Flanges | Socket Weld Flanges | Threaded Flanges |
| Lap Joint Flanges | Reducing Flanges | Orifice Flanges | Long Weld Neck Flanges | Plate Flanges |
Industries and Applications We Supply
| Industry | Applications |
|---|---|
Oil & Gas Industry |
Upstream Exploration & Production: Bangladesh’s natural gas sector, dominated by Petrobangla and international operators like Chevron Bangladesh and Tullow Oil, relies extensively on carbon steel flanges for wellhead connections, gathering systems, and gas processing facilities. The Bibiyana gas field (Bangladesh’s largest), Titas field, and Jalalabad field utilize ASTM A105 flanges in Classes 300# to 1500# for high-pressure well connections and flow lines operating up to 10,000 PSI. Offshore exploration in the Bay of Bengal requires carbon steel flanges with enhanced corrosion protection for subsea wellheads, production risers, and platform piping. Werner Flanges supplies hot-dip galvanized A105 flanges and RTJ-faced high-pressure units for these demanding marine environments. Midstream Gas Transmission: Downstream Distribution: Refinery Operations:
LNG Import Infrastructure:
Sendout Systems: Class 300# flanges for pipeline connections to national grid. |
Power Generation
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Petrochemical & Chemical Processing |
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Frequently Asked Questions (FAQs)
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1. what is the difference between astm a105 and a350 lf2 carbon steel flanges?
- astm a105 is standard carbon steel suitable for ambient to moderately elevated temperatures (-29°c to 427°c), used in most bangladesh industrial applications including power plants, textile mills, and general manufacturing. astm a350 lf2 is low-temperature carbon steel designed for cryogenic services down to -45°c, required for lng terminals, industrial refrigeration, and specialized chemical processes. for bangladesh’s tropical climate applications (steam, water, compressed air), a105 is the appropriate choice.
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2. how long does delivery take to chittagong or dhaka?
- standard sea freight delivery to chittagong port takes 18-22 days from our manufacturing facility. road transport from chittagong to dhaka adds 3-4 days, bringing total delivery to dhaka projects to 21-26 days. for urgent requirements, air freight to hazrat shahjalal international airport dhaka takes 5-7 days with same-day delivery to dhaka metro area. we coordinate with bangladesh clearing agents to expedite customs clearance, minimizing port dwell time.
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3. can you manufacture carbon steel flanges to metric dimensions for bangladesh projects?
- yes, we manufacture custom carbon steel flanges to metric dimensions (dn sizing), non-standard bore diameters, or special drilling patterns required by european equipment manufacturers or specific project specifications in bangladesh. our engineering team reviews customer drawings, confirms feasibility, and provides custom manufacturing quotes. custom flanges typically add 7-10 days to standard lead times. we have successfully supplied metric-dimensioned flanges for european epc contractors executing power and petrochemical projects in bangladesh.
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4. do your carbon steel flanges comply with standards used in bangladesh?
- yes, we manufacture to asme b16.5 standards, which are widely adopted in bangladesh’s industrial sector. bangladesh’s engineering, petroleum, and power industries predominantly specify asme/ansi standards. we also manufacture to din, bs, and other international standards when required. all flanges include material test certificates confirming astm material specifications (a105, a350 lf2) and compliance statements. for projects requiring bangladesh standards (bds), we provide documentation mapping asme specifications to equivalent local requirements.
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5. what testing and certifications can you provide for bangladesh petroleum and power projects?
- we provide comprehensive testing including dimensional inspection per asme b16.5, mechanical testing (tensile, hardness), impact testing for a350 lf2, pmi verification, and ndt (liquid penetrant, magnetic particle, ultrasonic) when specified. third-party inspection by tüv, lloyd’s register, sgs, bureau veritas, or customer representatives can be arranged at our facility before shipment to bangladesh. we provide en 10204 type 3.1 material test certificates, heat treatment charts, dimensional reports, and all documentation required for bangladesh petroleum corporation, bpdb, and major epc contractor quality systems. nace mr0175 compliance is available for sour gas service.
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6. can you expedite delivery for emergency flange replacements in bangladesh?
- yes, we maintain inventory of common carbon steel flange sizes (2″-12″, classes 150# and 300#, astm a105) enabling emergency shipments within 3-5 days via air freight to dhaka or chittagong. for bangladesh power plants, refineries, or manufacturing facilities experiencing unplanned outages due to flange failures, we prioritize emergency orders, arrange immediate air cargo booking, and coordinate with clearing agents for rapid customs clearance.
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7. what size range of carbon steel flanges can you supply to bangladesh?
- we manufacture carbon steel flanges from ½” (dn 15) to 60″ (dn 1500) in all asme b16.5 pressure classes (150# through 2500#). small bore flanges (½”-2″) are commonly used in pharmaceutical instrumentation and sampling systems; medium sizes (3″-12″) serve general industrial piping in textile, manufacturing, and utility systems; large diameters (14″-36″) handle water treatment, power plant cooling, and refinery main headers; extra-large sizes (40″-60″) serve water supply projects, power plant circulating water, and major infrastructure developments. we can supply mixed container loads with various sizes to meet complete project requirements.
