Industrial Carbon Steel Flanges Supplier in the Philippines

Leading Supplier of Carbon Steel Flanges Serving
Philippine Industrial and Infrastructure Projects

Werner Flanges is a trusted manufacturer and global distributor of carbon steel flanges, delivering high-quality piping solutions to clients across the Philippines for over two decades. With deep expertise in industrial flange manufacturing and an unwavering commitment to international quality standards, Werner Flanges has become the supplier of choice for procurement professionals, project engineers, and plant managers throughout the Philippine archipelago.

We supply carbon steel flanges to every major industrial hub in the Philippines — from Metro Manila and the CALABARZON industrial corridor to Cebu’s manufacturing belt, the Subic Bay Freeport Zone, and the booming petrochemical developments in Batangas City. Our product range covers weld neck flanges, slip-on flanges, blind flanges, socket weld flanges, threaded flanges, and lap joint flanges in all pressure classes from 150# through 2500#.

All Werner Flanges carbon steel products are manufactured in compliance with ASME B16.5, ASTM A105, ASTM A350 LF2, and API standards. Our in-house quality management system is ISO 9001:2015 certified, and we offer full material traceability with Mill Test Certificates (MTC) on every shipment. For Philippine buyers, we offer competitive ex-works pricing, sea freight delivery via the Port of Manila or Port of Cebu in 18–25 days, and a dedicated technical support team to assist with material selection and compliance queries.

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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	Expander Flanges

Industries and Applications We Supply

Industry	Applications
Oil & Gas Industry	The Philippines’ oil and gas sector — anchored by the Malampaya deepwater gas field operated by Shell Philippines Exploration — relies on high-integrity carbon steel flanges for gas gathering, compression, and transmission piping. Werner Flanges supplies Class 600# and 900# weld neck flanges in ASTM A105N for offshore platform tie-in connections, gas processing facilities, and onshore pipeline networks operated by PNOC Exploration Corporation (PNOC-EC) and other operators. Our carbon steel flanges meet API 6A and ASME B16.5 requirements for upstream wellhead connections and downstream processing.The growing LNG sector — including First Gen’s FGEN LNG terminal at Batangas Bay and planned LNG regasification projects to support the Philippines’ energy transition — creates significant demand for ASTM A350 LF2 low-temperature carbon steel flanges for cryogenic and cold utility piping systems.
Petrochemical & Refining	Petron Corporation’s Bataan Refinery — the Philippines’ only remaining oil refinery — and chemical plants in the Batangas and Cavite industrial corridors use carbon steel flanges throughout their process piping for crude oil, fuel gas, process steam, and utility connections. Werner Flanges supplies NACE MR0175-compliant carbon steel flanges for sour service applications and ASME B16.5 Class 150# to 600# flanges for atmospheric and pressure vessel nozzle connections, heat exchanger connections, and pump suction/discharge applications.
Power Generation	The Philippines relies on a diverse generation mix including coal, natural gas, geothermal, hydro, and growing renewable capacity. Major coal-fired power plants — including GNPower Mariveles Coal Plant, Semirara Coal Power Plant, Pagbilao Power Station (TeaM Energy), and Sual Power Station — use large-diameter carbon steel flanges for boiler feed water systems, steam turbine connections, condensate return, and cooling water piping. Werner Flanges supplies Class 300# to 900# blind flanges, weld neck flanges, and slip-on flanges for boiler and turbine systems operating at high pressures and temperatures. Our flanges comply with ASME Boiler and Pressure Vessel Code (BPVC) Section I requirements for power boiler applications.
Water & Wastewater Treatment	Metropolitan Waterworks and Sewerage System (MWSS) and its concessionaires Maynilad and Manila Water Company operate extensive water distribution and treatment infrastructure across Metro Manila and adjacent provinces. Large-diameter Class 150# carbon steel slip-on and weld neck flanges are used in water treatment plants, booster pump stations, and transmission mains. Werner Flanges supplies AWWA-compatible carbon steel flanges for these potable water infrastructure applications. Wastewater treatment facilities across the Philippines’ growing industrial zones also rely on carbon steel flanges for sludge handling, aeration systems, and effluent discharge piping.

Frequently Asked Questions (FAQs)

q1: what is the delivery time for carbon steel flanges to manila from werner flanges?: standard sea freight delivery from our manufacturing facility to the port of manila (micp or south harbor) typically takes 18–22 days. expedited air freight to naia cargo terminal is available in 5–7 days for urgent requirements. common astm a105 sizes are maintained in ready stock and can be dispatched within 24–48 hours.
q2: do werner flanges products comply with asme b16.5 and philippine regulatory requirements?: yes. all carbon steel flanges are manufactured to asme b16.5 dimensional and pressure-temperature requirements and astm a105 or astm a350 material standards. complete documentation including en 10204 3.1 material test certificates and inspection reports supports philippine project compliance, dole mechanical safety inspections, and international epc contractor requirements.
q3: can werner flanges supply astm a350 lf2 flanges for batangas lng terminal projects?: yes. we supply astm a350 lf2 class 1 carbon steel flanges for lng and cryogenic services with charpy impact testing at -46°c and full material certification. our engineering team can review project specifications and provide technical recommendations for batangas lng terminal applications.
q4: what custom flange options are available for philippine projects?: custom manufacturing options include special bore sizes, non-standard pressure ratings, large raised face or lens joint facings, hot-dip galvanizing, fusion-bonded epoxy coating, and specialized heat treatment. typical lead time for custom orders is 4–6 weeks depending on project specifications.
q5: can werner flanges provide third-party inspection for philippine buyers?: yes. third-party inspection can be arranged through internationally recognized agencies including sgs philippines, bureau veritas, lloyd’s register, intertek, dnv, and tuv. inspection witnessing, documentation review, and final release certification can be coordinated as part of the manufacturing process.
q6: is werner flanges able to supply large-diameter flanges for philippine water infrastructure?: yes. we manufacture large-diameter carbon steel flanges up to 60 inch nps in accordance with asme b16.47 series a and series b standards. these are suitable for water transmission pipelines, pump stations, and treatment plant piping systems used in major philippine infrastructure projects.
q7: do you supply flanges for the philippine mining sector?: yes. we supply carbon steel flanges for slurry handling, process water systems, and mining chemical applications used in philippine nickel, copper, and chromite operations. heavy-wall flanges with protective coatings and application-based material recommendations are available for abrasive and mildly corrosive environments.