ANSI B16.5 Flanges for Mexico

Leading Manufacturer & Supplier of ANSI B16.5 Flanges for Mexico’s Oil, Gas & Industry

Werner Flanges is a globally recognized manufacturer and exporter of ANSI B16.5 flanges, proudly serving Mexico's dynamic industrial markets with certified, high-quality piping components for over 25 years. As Mexico's energy sector undergoes a transformational expansion — from the landmark Dos Bocas refinery in Tabasco and PEMEX's 2024–2030 hydrocarbon strategy, to ambitious petrochemical expansions in Veracruz — the demand for precision-engineered flanges that meet ASME B16.5 and ASTM standards has never been higher.

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Our ANSI B16.5 flanges are manufactured in all seven standard types — Weld Neck, Slip On, Blind, Socket Weld, Threaded, Lap Joint, and Orifice — across the full pressure class range from 150# to 2500# and nominal pipe sizes from 1/2″ to 60″. Every flange is produced from certified raw materials including Carbon Steel (ASTM A105), Stainless Steel (ASTM A182 F304/F316), Alloy Steel (F11, F22, F91), and Duplex/Super Duplex grades (F51, F53, F55), ensuring compatibility with Mexico’s most demanding process conditions.

We supply directly to procurement teams, EPC contractors, and engineering firms serving PEMEX, CFE (Comision Federal de Electricidad), and private operators across Mexico City, Monterrey, Guadalajara, Veracruz, Tampico, Ciudad del Carmen, and Coatzacoalcos. Our products are shipped through the ports of Manzanillo, Veracruz, Altamira, and Tampico, with sea freight delivery times of 18–25 days and expedited air freight options for urgent requirements.

ISO 9001:2015 certified and compliant with ASME, ASTM, NACE MR0175, and API standards, Werner Flanges provides a complete documentation package — including Mill Test Certificates, Dimensional Inspection Reports, Heat Treatment Charts, and PMI Test Reports — ensuring seamless acceptance at PEMEX procurement and third-party inspection checkpoints.

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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
Cladded Materials	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	Mexico’s oil and gas industry, anchored by Petróleos Mexicanos (PEMEX), is the single largest consumer of ANSI B16.5 flanges in the country. PEMEX’s 2024–2030 Hydrocarbon Sector Plan targets sustained crude production of 1.8 million barrels per day, with investment in 18 new fields, 15 new offshore platforms, and 14 new pipeline segments totalling 175 kilometers. Each of these projects requires thousands of precision flanges for wellhead connections, manifold assemblies, separator vessels, and piping networks.Upstream operations in the Bay of Campeche — including shallow-water and deepwater blocks — require flanges resistant to H2S (NACE MR0175 compliant), chloride-rich seawater, and cyclic pressure. In midstream, PEMEX’s gas transmission network and the planned new pipeline installations require large-bore flanges in Class 600# and 900# for high-pressure natural gas service. Downstream, the six existing PEMEX refineries — Cadereyta, Salamanca, Minatitlan, Madero, Salina Cruz, and Tula — plus the nearly complete Dos Bocas (Olmeca) refinery in Tabasco, represent major ongoing consumers of replacement and new construction flanges.
Petrochemical & Chemical Processing	Mexico’s petrochemical sector is centered in the state of Veracruz, where PEMEX operates its Cangrejera, Morelos, Cosoleacaque, Cuauhtémoc, Pajaritos, and Escolín complexes. A MXN 13.9 billion expansion program (2025–2028) is underway to expand ammonia, urea, and ethylene production at these facilities. Flanges for petrochemical service must meet stringent corrosion resistance requirements — stainless steel grades F304L and F316L are standard for ammonia and chemical service, while duplex grades F51 are specified for chloride-bearing streams and coastal environments.The Coatzacoalcos and Minatitlan industrial zones also host private petrochemical operators requiring ANSI B16.5 flanges for reactor vessels, distillation columns, heat exchangers, and piping interconnects. Werner Flanges supplies certified flanges for these applications with full ASME B31.3 process piping compliance documentation
Power Generation	Comision Federal de Electricidad (CFE) operates Mexico’s national electricity grid, including a fleet of combined-cycle gas turbine (CCGT) plants, hydroelectric facilities, and thermal power stations. High-pressure steam applications in CCGT plants require alloy steel flanges in grades F91 and F22 for supercritical and ultra-supercritical steam headers. Werner Flanges supplies these specialized alloy grades with full material traceability and compliance to ASME B31.1 power piping requirements.
Water & Wastewater Treatment	Mexico’s municipal water treatment and wastewater infrastructure — including major projects in the Bajío region, CDMX metropolitan area, and the Monterrey metropolitan water system — requires ANSI B16.5 Class 150# and 300# flanges in carbon steel and stainless steel grades for pumping stations, treatment plant piping, and distribution headers. Werner Flanges supplies flat-face and raised-face flanges for these low-pressure, high-volume infrastructure applications.

Frequently Asked Questions (FAQs)

q1: are werner flanges products compatible with pemex technical specifications?: yes. all werner flanges ansi b16.5 products are manufactured to asme b16.5, astm a105/a182, and nace mr0175 standards — the same standards referenced in pemex’s engineering specifications (nrf specifications) and procurement orders. full documentation packages are provided including en 10204 3.1 mtcs, dimensional inspection reports, and pmi test results. third-party inspection by pemex-approved bodies (tuv, dnv, bv, sgs) can be arranged.
q2: what is the typical delivery time for flanges to mexico city, monterrey, or veracruz?: standard sea freight delivery from our manufacturing facility to mexico’s major ports is 18–25 days. goods arrive at port of manzanillo (serving guadalajara/cdmx), port of veracruz (serving central and southern mexico), and port of altamira/tampico (serving monterrey and northeast mexico). expedited air freight is available with 2–3 day transit times for urgent project requirements.
q3: can you supply flanges compliant with nace mr0175 for h2s service in pemex upstream operations?: yes. werner flanges supplies nace mr0175/iso 15156 compliant flanges for sour service (h2s-containing) applications in pemex upstream operations in campeche, tabasco, chiapas, and veracruz. compliant materials include astm a105n (normalized, hardness controlled to 22 hrc max), astm a182 f316l, f51, and f53. nace compliance statements and hardness test certificates are provided with each shipment.
q4: do you offer custom sizes or special bore dimensions for retrofit projects?: yes. werner flanges offers custom manufacturing for non-standard bore diameters, special facing types, custom bolt hole patterns, and project-specific dimensional requirements. this service is frequently used for pemex refinery retrofit projects where existing equipment does not conform to standard asme b16.5 dimensional tables. please provide your dimensional drawings or reverse engineering requirements with your rfq.
q5: what material grades do you recommend for pemex offshore platform applications in the gulf of mexico?: for offshore platform service in the gulf of mexico (bay of campeche), we recommend: astm a182 f316l for general offshore piping with chloride exposure; astm a182 f51 (duplex 2205) for high-strength applications with combined corrosion and stress requirements; astm a182 f53/f55 (super duplex) for seawater injection systems, subsea flowlines, and high-chloride process streams. all grades are available with nace mr0175 compliance and dnv or bv third-party certification.
q6: can you supply flanges conforming to both asme b16.5 and mexican nom standards?: yes. while mexico primarily uses asme/astm standards for industrial piping — particularly in oil, gas, and petrochemical sectors — werner flanges can supply flanges with documentation structured to meet specific regulatory requirements. for projects requiring nom (norma oficial mexicana) compliance or sener (secretaria de energia) approval documentation, specify this requirement in your rfq and our documentation team will confirm the applicable compliance scope.
q7: do you supply flanges for the dos bocas (olmeca) refinery project?: yes. werner flanges is an active supplier to epc contractors and procurement firms serving the dos bocas refinery project in tabasco, mexico. this usd 12 billion facility requires a comprehensive range of ansi b16.5 flanges in carbon steel, stainless steel, and alloy grades. we maintain relevant material certifications and can support expedited delivery requirements for project milestones.