Slip On Flanges in the USA for Oil, Gas & Power Industries

Leading Supplier of Slip On Flanges in the USA for Oil, Gas & Power Industries

Werner Flanges is a globally recognized manufacturer and exporter of slip on flanges, proudly serving customers across the United States for over two decades. With deep expertise in ASME B16.5 standards and a state-of-the-art forging facility, Werner Flanges delivers precision-engineered flanges that meet the exacting demands of America's most critical industries — from the oil refineries lining the Gulf Coast to power plants across the Midwest and chemical complexes in the industrial heartland.

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Our USA supply network covers every major industrial hub, including Houston (TX), Los Angeles (CA), Chicago (IL), Baton Rouge (LA), Philadelphia (PA), Detroit (MI), and New Jersey’s extensive petrochemical corridor. Whether you need a single batch of 1/2″ carbon steel slip on flanges or a bulk consignment of 24″ super duplex flanges rated to Class 2500, Werner Flanges can fulfill your order with unmatched speed and precision.

We supply slip on flanges in a comprehensive range of materials — Carbon Steel (ASTM A105), Stainless Steel (ASTM A182 F304/316), Alloy Steel (F11, F22, F91), Duplex (F51), and Super Duplex (F53/F55) — all manufactured to ASME, ASTM, ANSI, and MSS standards. Our ISO 9001:2015-certified quality management system ensures that every flange leaving our facility is dimensionally accurate, metallurgically sound, and inspection-ready with full material traceability.

With sea freight delivery times of 18–25 days to major US ports (Houston, LA/Long Beach, New York/New Jersey) and expedited air freight available for urgent requirements, Werner Flanges is the dependable partner American procurement teams trust for on-time, on-spec delivery.

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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	Raised Face Slip On Flanges	Flat Face Slip On Flanges	RTJ Slip On Flanges	Forged Slip On Flanges
Plate Slip On Flanges	Industrial Slip On Flanges	High Pressure Slip On Flanges	ASME B16.5 Slip On Flanges	ANSI Slip On Flanges

Industries and Applications We Supply

Industry	Applications
Oil & Gas Industry	The United States is one of the world’s largest oil and gas producers, with major producing basins in the Permian Basin (TX/NM), Eagle Ford Shale (TX), Bakken (ND), DJ Basin (CO), and offshore Gulf of Mexico. Werner Flanges supplies slip on flanges to upstream drilling contractors, midstream gathering and transmission operators, and downstream refiners including companies operating along the Gulf Coast refinery corridor stretching from Texas City to Baton Rouge.Our Class 300# through 900# carbon steel and alloy slip on flanges are specified for wellhead gathering lines, custody transfer metering stations, compressor station piping, and refinery process units. For sour gas (H2S) service, we supply NACE MR0175 / ISO 15156 compliant flanges with documented hardness control
Petrochemical & Refining	The US petrochemical industry — concentrated in the Gulf Coast Texas-Louisiana Chemical Complex, the Delaware Valley corridor (PA/NJ), and the Ohio Valley — requires flanges capable of handling aggressive chemicals, elevated temperatures, and complex cyclic loading. Werner Flanges supplies stainless steel (F304/F316), duplex (F51), and high-alloy slip on flanges for reactor feed lines, distillation column nozzle connections, storage tank inlet/outlet manifolds, and heat exchanger piping.
Power Generation	America’s power generation fleet — encompassing natural gas combined-cycle plants, nuclear facilities, coal power stations undergoing environmental upgrades, and growing utility-scale renewable energy projects — relies on high-integrity flanges for steam, cooling water, and process connections. Werner Flanges supplies F22 and F91 alloy steel slip on flanges for supercritical steam turbine systems and F321 stainless flanges for high-temperature heat recovery steam generator (HRSG) nozzle connections.
Water & Wastewater Treatment	Municipal water utilities and industrial wastewater treatment facilities across the USA are significant consumers of Class 150# and 300# carbon steel and 316L stainless steel slip on flanges. Their ease of installation and competitive pricing make slip on flanges the preferred choice for water treatment plant piping, pump station headers, filtration system connections, and distribution infrastructure in cities including Chicago, Phoenix, Atlanta, and New York.

Frequently Asked Questions (FAQs)

q1: are your slip-on flanges compliant with asme b16.5?: yes. all werner flanges slip-on flanges are manufactured and dimensionally verified to asme b16.5. each flange is die-stamped per mss sp-25 with material grade, pressure class, size, and manufacturer identification. full dimensional inspection reports are supplied with every order.
q2: do you supply nace mr0175 compliant flanges for sour gas service?: yes. werner flanges supplies nace mr0175 / iso 15156 compliant carbon steel (a105n) and alloy steel flanges with controlled hardness (hb ≤ 187 for a105n) documented on the mtc. nace compliance certificates and pmi test reports are included in the documentation package. we also supply sscc-resistant duplex and super duplex grades for h2s-containing service.
q3: can you provide third-party inspection by agencies recognized in the usa?: absolutely. we work regularly with tuv rheinland, bureau veritas (bv), dnv gl, sgs, and intertek for third-party inspection (tpi). customer or tpi agency representatives are welcome to witness testing and inspection at our facility. tpi can be arranged for chemical analysis, mechanical testing, dimensional verification, pmi, ndt, and pre-shipment inspection.
q4: do you offer custom slip-on flanges for non-standard specifications?: yes. werner flanges regularly manufactures non-standard slip-on flanges to customer-supplied drawings, including special bore dimensions, non-standard pressure classes, custom facing specifications, and unusual material grades. dimensional qualification samples can be provided before full production release.
q5: can you supply slip-on flanges already coated or painted per my specification?: yes. in addition to our standard rust-preventive oil coating, werner flanges can apply primers, epoxy coatings, and xylan/ptfe flange face coatings per customer specifications. please provide coating specification, dry film thickness requirements, and any applicable standards (e.g., sspc, nace coating standards) with your enquiry.