ANSI B16.5 Flanges to Nigeria

Leading Manufacturer & Exporter of
ANSI B16.5 Flanges to Nigeria

Werner Flanges stands as Nigeria's trusted partner for premium ANSI B16.5 flanges, serving the nation's rapidly expanding oil and gas, petrochemical, and power generation sectors for over two decades. As an ISO 9001:2015 certified manufacturer and direct exporter from India, we supply comprehensive flange solutions to major Nigerian industrial hubs including Lagos, Port Harcourt, Warri, Kaduna, and Abuja.

Our ANSI B16.5 flange inventory encompasses all seven standard types manufactured in accordance with ASME B16.5 specifications: weld neck flanges, slip on flanges, blind flanges, socket weld flanges, threaded flanges, lap joint flanges, and reducing flanges. Each product meets the stringent requirements of Nigeria’s petroleum industry, particularly for operations in the Niger Delta region where corrosion resistance and structural integrity are paramount.

We manufacture ANSI B16.5 flanges in complete material specifications including carbon steel (ASTM A105, A350 LF2), stainless steel grades (304, 304L, 316, 316L, 321), alloy steel (F11, F22, F91), and duplex/super duplex stainless steel (F51, F53, F55). Our pressure class range spans from 150# to 2500#, with sizes available from ½” to 60″ to meet diverse project requirements across Nigeria’s industrial landscape.
With strategic shipping partnerships through Apapa Port and Tin Can Island Port in Lagos, as well as Port Harcourt and Onne Port, we ensure reliable delivery timelines of 18-25 days for sea freight and expedited 5-7 day options via air freight. Every ANSI B16.5 flange shipment includes comprehensive documentation packages featuring Material Test Certificates (MTC) 3.1/3.2, dimensional inspection reports, PMI test results, and all necessary customs clearance documents for seamless import into Nigeria.

ASME B16.5 flanges Nigeria price
Weld neck flanges Lagos supplier
Carbon steel flanges Port Harcourt
Stainless steel 316L flanges Nigeria
Class 600 flanges Nigerian oil and gas
NACE MR0175 flanges sour service Nigeria
RTJ flanges supplier Nigeria offshore
Duplex flanges Nigerian petrochemical
ANSI B16.5 flanges Abuja delivery
API 6A flanges Nigeria wellhead

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 Spectacle Blind Flanges

Industries and Applications We Supply

Industry Applications
Oil & Gas Industry
  • Nigeria’s petroleum sector represents the nation’s economic backbone and the primary application for ANSI B16.5 flanges. The country ranks as Africa’s largest oil producer, with production concentrated in the Niger Delta region spanning Rivers, Bayelsa, Delta, Akwa Ibom, and Ondo states.Upstream Production: Nigerian offshore and onshore oil fields extensively utilize ANSI B16.5 flanges throughout wellhead assemblies, Christmas trees, production manifolds, flow lines, and gathering systems. Major operators including Shell Petroleum Development Company (SPDC), Chevron Nigeria, TotalEnergies, ExxonMobil, Nigerian Agip Oil Company (NAOC), and indigenous producers like Seplat Energy and Aiteo Eastern specify Class 600 and 900 weld neck flanges for high-pressure well streams.Offshore platforms in the Niger Delta and deepwater Gulf of Guinea environments require corrosion-resistant flanges—typically 316L stainless steel, duplex F51, or super duplex F53/F55—for seawater injection systems, produced water handling, topside piping exposed to salt spray, and subsea connections. The corrosive combination of seawater, H₂S, CO₂, and chlorides in Nigerian crude makes material selection critical for reliable long-term performance.

    Midstream Infrastructure: Gas processing facilities operated by Nigerian Gas Company (NGC), oil and gas separation plants, and custody transfer metering stations utilize ANSI B16.5 flanges throughout process equipment, compressor stations, and pipeline connections. The Trans-Niger Pipeline, Escravos-Lagos Pipeline System, and Obiafu-Obrikom-Oben (OB3) gas pipeline employ carbon steel A105 and alloy steel flanges for reliable gas transmission.

    Downstream Refining: Nigeria’s four refineries—Port Harcourt Refining Company (two refineries with combined 210,000 bpd capacity), Warri Refining & Petrochemical Company (125,000 bpd), and Kaduna Refining & Petrochemical Company (110,000 bpd)—extensively use ANSI B16.5 flanges throughout atmospheric distillation, vacuum distillation, catalytic reforming, fluid catalytic cracking, hydrotreating, and product blending units. The Dangote Refinery in Lagos, with 650,000 bpd capacity representing Africa’s largest refinery, incorporates tens of thousands of ANSI B16.5 flanges across all process units.

    Material selection spans the full range from carbon steel A105 for non-corrosive hydrocarbon service, through 321 stainless steel for high-temperature reformer units, to F11 and F22 alloy steels for hydrogen service in hydrotreating units. Pressure classes range from 150# for low-pressure storage and blending systems to 600# and 900# for high-pressure reactors and fractionation columns.



Petrochemical & Chemical Processing
  • Nigeria’s expanding petrochemical sector transforms natural gas and petroleum feedstocks into fertilizers, methanol, plastics, and industrial chemicals, creating substantial demand for corrosion-resistant ANSI B16.5 flanges.Fertilizer Production: Indorama Eleme Petrochemicals Limited in Rivers State and Notore Chemical Industries fertilizer plant in Onne produce urea and NPK fertilizers using ammonia synthesis processes. These facilities require 316L stainless steel flanges for ammonia service, carbon steel for high-pressure synthesis gas, and duplex steel for corrosive process condensate streams.Methanol Production: Nigeria’s methanol plants including facilities operated by Brass Methanol Company in Bayelsa State utilize ANSI B16.5 flanges throughout synthesis gas preparation, methanol synthesis reactors, and distillation systems. High-pressure synthesis sections require Class 600 or 900 alloy steel flanges rated for temperatures to 400°C.

    Plastics & Polymers: Polyethylene and polypropylene production facilities use stainless steel ANSI B16.5 flanges for catalyst injection systems, reactor cooling circuits, and polymer transfer lines. The specialized corrosive nature of polymerization catalysts and aggressive process conditions require careful material selection.

    Industrial Chemicals: Chemical processing plants in Lagos, Kano, and Port Harcourt industrial estates manufacture acids, caustics, solvents, and specialty chemicals using equipment connected with corrosion-resistant flanges. Sulfuric acid plants require 316L or higher alloys, while caustic production facilities use nickel alloys or specialized stainless grades resistant to hot sodium hydroxide.
Power Generation
  • Nigeria’s power generation infrastructure spans thermal power plants, hydroelectric facilities, and emerging renewable energy projects, all requiring ANSI B16.5 flanges for steam systems, cooling circuits, and process piping.Thermal Power Plants: Gas-fired power stations including Egbin Power Station (1,320 MW), Afam Power Station (988 MW), Sapele Power Station (1,020 MW), and newer facilities like Azura-Edo IPP (461 MW) utilize ANSI B16.5 flanges throughout boiler systems, steam turbines, condensate systems, feedwater circuits, and auxiliary equipment.High-pressure steam piping requires alloy steel F11 or F22 flanges in Class 600 or 900, capable of withstanding superheated steam at 540°C and pressures to 140 bar. Feedwater systems use carbon steel A105 flanges in Class 300, while low-pressure condensate return employs Class 150 carbon steel.

    Gas turbine combined-cycle plants incorporate ANSI flanges in fuel gas systems, heat recovery steam generators (HRSG), steam turbines, and cooling water circuits. The fast-track construction schedule of independent power projects (IPPs) demands reliable flange supply with complete documentation enabling rapid Nigerian customs clearance and on-site installation.

    Coal Power (Emerging): Planned coal-fired power plants including Zungeru project will require extensive ANSI B16.5 flange applications in coal handling, combustion air systems, flue gas handling, ash removal, and steam generation equipment.

    Cooling Systems: Power plant cooling water systems, whether once-through, cooling tower, or closed-loop configurations, use carbon steel or stainless steel ANSI B16.5 flanges. Coastal plants drawing seawater for cooling specify duplex or super duplex flanges for seawater-exposed piping.
Water & Wastewater Treatment
  • Nigeria’s municipal water supply and wastewater treatment infrastructure serves major population centers including Lagos (15+ million), Kano, Ibadan, Port Harcourt, and Abuja, requiring extensive piping systems connected with ANSI B16.5 flanges.Water Treatment Plants: Raw water intake, coagulation, flocculation, sedimentation, filtration, and disinfection processes utilize carbon steel or ductile iron ANSI B16.5 flanges in Class 150 for cost-effective, reliable connections. The Lagos Water Corporation, Kano State Water Board, and other state water authorities specify ANSI flanges for new installations and system expansion projects.Desalination (Coastal Regions): Emerging desalination projects in Lagos and coastal cities require corrosion-resistant super duplex or titanium flanges for seawater intake and high-pressure reverse osmosis systems. The aggressive combination of seawater, high pressure, and chlorine disinfection demands premium materials for reliable long-term operation.

    Wastewater Treatment: Municipal sewage treatment plants use carbon steel or stainless steel ANSI flanges in screening, primary clarification, aeration basins, secondary clarification, disinfection, and biogas handling systems. Industrial wastewater treatment at refineries, chemical plants, and manufacturing facilities may require corrosion-resistant alloys based on effluent chemistry.

    Water Distribution Networks: Large-diameter transmission mains and distribution piping in Nigerian cities increasingly use flanged connections (versus mechanical joint fittings) for critical valves, flow meters, pumping stations, and major pipeline sections. Ductile iron or carbon steel ANSI Class 150 flanges provide economical connections rated for typical distribution pressures of 60-100 psi.

Frequently Asked Questions (FAQs)

1. Are your ANSI B16.5 flanges compatible with flanges from other manufacturers?

Yes, absolutely. ASME B16.5 is a dimensional standard ensuring interchangeability between manufacturers. Werner Flanges manufactured to ASME B16.5 specifications will properly mate with any other ASME B16.5 conforming flange regardless of manufacturer. All critical dimensions—flange diameter, thickness, bolt circle diameter, bolt hole size and quantity, and raised face dimensions—exactly match ASME B16.5 tables ensuring bolt holes align and gaskets seat properly.

This interchangeability is essential for Nigerian projects sourcing flanges from multiple suppliers or replacing existing flanges during maintenance. Our dimensional inspection reports document conformance to ASME B16.5 tolerances providing assurance of proper fit.

2. What delivery time can you guarantee for urgent Nigerian projects?

Standard sea freight delivery to Lagos (Apapa Port) or Port Harcourt requires 18-25 days from order confirmation. This includes manufacturing time for standard sizes in common materials, inland transport to Mumbai/Nhava Sheva port, ocean transit, and arrival at Nigerian port.

For emergency requirements, we offer expedited air freight delivery in 5-7 days via Murtala Muhammed International Airport (Lagos) or Port Harcourt International Airport. Air freight is economical for critical items like specific sizes needed for emergency shutdowns or small quantities supporting fast-track project schedules. We maintain limited inventory of common carbon steel sizes enabling immediate shipment when your timeline demands.

3. Can you provide flanges with NACE MR0175 compliance for sour service?

Yes, Werner Flanges manufactures NACE MR0175 / ISO 15156 compliant flanges for Nigerian sour oil and gas applications. We carefully control material chemistry and heat treatment to maintain hardness below 22 HRC as required for H₂S service. Carbon steel A105 flanges receive normalized heat treatment with hardness verification throughout the flange body.

Stainless steel and duplex materials are selected from ISO 15156-3 qualified grades appropriate for the anticipated H₂S partial pressure and chloride content. Complete hardness testing documentation and NACE compliance statements are provided with material certificates for Nigerian sour service applications.

4. Do you supply flanges with RTJ (Ring Type Joint) facings for high-pressure applications?

Yes, we manufacture ANSI B16.5 flanges with Ring Type Joint facings per API 6A specifications. RTJ flanges feature precision-machined grooves accepting metal ring gaskets (oval or octagonal profiles) for superior sealing in high-pressure, high-temperature applications.

Nigerian refinery high-pressure reactors, offshore wellhead equipment, and critical process connections specify RTJ flanges for leak-tight sealing under severe conditions. We can supply flanges with grooves and matching ring gaskets in soft iron, stainless steel, or Inconel materials as required. Groove dimensions conform to API 6A Ring Gasket specification ensuring compatibility with standard ring gaskets available in Nigeria.

5. What documentation do you provide for Nigerian customs clearance?

Every shipment includes complete commercial documentation required for efficient Nigerian customs processing:

  • Commercial invoice with detailed flange specifications, quantities, values
  • Packing list identifying package contents, weights, measurements
  • Certificate of origin certifying products manufactured in India
  • Bill of lading from shipping line
  • Material test certificates (EN 10204 Type 3.1/3.2)
  • Manufacturer’s conformance certificate

When specified, we provide third-party inspection certificates from TÜV, DNV, Bureau Veritas, Lloyd’s Register, or SGS. Our documentation packages are designed based on experience with Nigerian customs requirements, minimizing clearance delays and demurrage charges at Lagos, Port Harcourt, and other Nigerian ports.

6. Can you manufacture custom flanges for special applications not covered by ASME B16.5?

Yes, our engineering team designs and manufactures custom flanges beyond standard ASME B16.5 catalog:

  • Non-standard sizes (intermediate diameters, sizes >24″)
  • Special materials (Inconel, Monel, Hastelloy, titanium, aluminum bronze)
  • Modified pressure ratings for unique pressure-temperature combinations
  • Proprietary facings or seal geometries
  • Integral components (flanges with nozzles, special inserts)

Nigerian projects frequently require custom flanges matching existing equipment from European or Asian manufacturers, larger sizes for pipeline applications, or special alloys for severe corrosive conditions. We work directly with your engineering team to develop optimal solutions meeting performance requirements while maintaining code compliance and cost-effectiveness.

7. What quality testing do you perform on every flange shipment?

Standard quality testing on all ANSI B16.5 flanges includes:

  • Positive Material Identification (PMI) via XRF – 100% of flanges
  • Dimensional inspection per ASME B16.5 – sampling per quality plan
  • Visual and surface inspection – 100% of flanges
  • Hardness testing – per heat treatment batch
  • Mechanical testing (tensile, impact) – per material heat number
  • Non-Destructive Testing as specified (UT, MPI, or LPI)

Additional testing available when specified for Nigerian critical applications:

  • 100% ultrasonic testing for volumetric soundness
  • Hydrostatic pressure testing
  • Ferrite content measurement (duplex stainless steel)
  • Intergranular corrosion testing (stainless steel)
  • Stress corrosion testing (for specific environments)

All testing performed by qualified personnel using calibrated equipment with results documented in inspection reports accompanying shipments.

8. How do I determine the correct pressure class for my Nigerian application?

Pressure class selection depends on design pressure, design temperature, and flange material:

  1. Determine design conditions: Maximum pressure and temperature expected during operation plus safety margins
  2. Consult ASME B16.5 pressure-temperature tables: These tables provide maximum allowable pressure for each material and pressure class at different temperatures
  3. Select pressure class: Choose the lowest pressure class that exceeds your design pressure at design temperature

For example: Carbon steel A105 service at 400°C and 30 bar design pressure requires Class 300 (rated 30.6 bar at 400°C). Note that pressure ratings decrease at elevated temperatures.

Our technical team assists Nigerian customers with pressure class selection, considering code requirements, safety factors, and industry standard practices for your specific application. Contact us with your operating conditions for recommendations

GET A QUOTE

Werner Flanges provides rapid quotation response for Nigerian ANSI B16.5 flange requirements, typically within 2-4 hours during business hours. Our streamlined quotation process ensures you receive accurate pricing, delivery commitments, and technical confirmation quickly.

Information Required for Quotation

To provide accurate and complete quotations, please include:

Flange Specifications:

  • Size (NPS inches or DN mm)
  • Pressure class (150#, 300#, 600#, 900#, 1500#, 2500#)
  • Flange type (weld neck, slip on, blind, socket weld, threaded, lap joint)
  • Material grade (A105, 316L, F11, F22, F51, etc.)
  • Facing type (RF, FF, RTJ with ring groove specification)

Quantities:

  • Quantity required for each size/pressure class/material combination
  • Future requirements if planning additional phases

Standards & Testing:

  • Applicable codes (ASME B16.5 standard, others if required)
  • Third-party inspection requirements (TÜV, DNV, BV, Lloyd’s, SGS)
  • Special testing (PMI, UT, MPI, LPI, RT)
  • NACE MR0175 compliance if sour service

Project Details:

  • Delivery location (Lagos, Port Harcourt, Abuja, etc.)
  • Required delivery date
  • Project name and end-user (for reference)
  • Payment terms requirements

Documentation:

  • Material certificates required (3.1, 3.2)
  • Third-party inspection certificates
  • Special marking requirements
  • Additional documentation needs

Contact Information

Email: sales@wernerflanges.com

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