Weld Neck Flanges to the Philippine

Leading Exporter of Precision
Weld Neck Flanges to the Philippine Oil & Gas Industry

Werner Flanges is a globally recognized manufacturer and exporter of premium-quality weld neck flanges to the Philippines, serving the nation's rapidly expanding energy, petrochemical, shipbuilding, and infrastructure sectors. With over two decades of manufacturing excellence and an ISO 9001:2015-certified production facility, we supply forged weld neck flanges that meet the rigorous demands of Filipino engineers and procurement specialists across Manila, Cebu, Davao, Batangas, and Cagayan de Oro.

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Our Philippines clientele spans upstream and downstream oil & gas operators, LNG terminal developers, shipyards in the Subic Bay Freeport Zone, power plant contractors, and water treatment authorities. Whether you require ASME B16.5 Class 150 weld neck flanges for a refinery tie-in or high-pressure Class 2500 flanges for an offshore platform, Werner Flanges delivers precision-machined products with full material traceability and third-party inspection support.

We manufacture weld neck flanges in an extensive range of materials including Carbon Steel (ASTM A105), Stainless Steel (ASTM A182 F304/F316), Alloy Steel (F11, F22, F91), Duplex and Super Duplex stainless (F51, F53), and Nickel Alloys. Sizes span 1/2″ to 60″ across all pressure classes from 150# to 2500#. All products comply with ASME B16.5, ASME B16.47, MSS SP-44, and API 6A standards, with optional compliance to DIN and BS specifications where required by Philippine project specifications.

Sea freight from our facility to the Port of Manila or Cebu International Port typically arrives within 18 to 22 days. For urgent requirements, air freight to Ninoy Aquino International Airport can deliver critical components in 3 to 5 business days.

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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

Weld Neck Flanges	Long Weld Neck Flanges	Heavy Barrel Weld Neck Flanges	Raised Face Weld Neck Flanges	Flat Face Weld Neck Flanges
Ring Type Joint Weld Neck Flanges	Hubbed Weld Neck Flanges	Tapered Hub Weld Neck Flanges	High Pressure Weld Neck Flanges	Custom Forged Weld Neck Flanges

Industries and Applications We Supply

Industry	Applications
Oil & Gas Industry	The Philippines hosts the Malampaya Deep Water Gas-to-Power Project — the country’s flagship natural gas development — along with numerous exploration blocks operated by companies including Philodrill Corporation, PXP Energy, and UC38. Weld neck flanges are indispensable across the full upstream-to-downstream value chain.Upstream applications include wellhead Christmas tree assemblies requiring Class 900# to 2500# flanges in F22 alloy steel or duplex stainless, subsea manifold connections, and flowline piping. Midstream applications span the Malampaya-to-shore gas pipeline, gas processing facilities, and compression stations. Downstream, weld neck flanges serve the Petron Bataan Refinery, Shell Tabangao Refinery, and Chevron Caltex terminals in Class 150# to 600# carbon and stainless steel grades.
Shipbuilding & Offshore Fabrication	The Subic Bay Freeport Zone hosts one of Southeast Asia’s major shipbuilding and offshore fabrication clusters. Offshore module fabrication yards and ship repair facilities throughout Subic, Batangas, and General Santos regularly source weld neck flanges for vessel piping systems, accommodation modules, and offshore structure tie-ins. Marine-grade F316L and duplex F51 flanges are standard in these applications.
Power Generation	The Philippines operates numerous coal-fired and combined-cycle gas turbine power plants, including the San Miguel Corporation Limay Coal Power Plant, EGCO Quezon Power Plant, and GNPower Kauswagan. High-pressure boiler feed water systems, steam piping, and HP/IP turbine connections require alloy steel weld neck flanges in ASTM A182 F22 and F91 grades to handle operating pressures up to 3,600 PSI and temperatures exceeding 565 degrees C in supercritical units.
Water & Wastewater Treatment	The Metropolitan Waterworks and Sewerage System (MWSS) and its concessionaires — Manila Water and Maynilad — along with local water districts manage extensive treatment and distribution infrastructure. Large-diameter weld neck flanges to ASME B16.47 in carbon steel and stainless steel serve pump headers, filter manifolds, and transmission main connections.

Frequently Asked Questions (FAQs)

q1: are your weld neck flanges accepted by philippine project specifications?: yes. werner flanges manufactures to asme b16.5 and asme b16.47 standards, which are widely referenced across philippine oil & gas, lng, power, and petrochemical project specifications. our iso 9001:2015 certification and complete documentation package including en 10204 3.1 material test certificates meet requirements of philippine government agencies, international epcm contractors, and major owner companies.
q2: what is the typical delivery time for weld neck flanges to the philippines?: standard items available in stock ship within 3 to 5 working days after order confirmation. sea freight transit to the port of manila or batangas port typically requires 18 to 22 days. custom-manufactured or special-grade flanges require approximately 2 to 4 weeks production prior to shipment. urgent requirements can be delivered via air freight within 3 to 5 business days from dispatch.
q3: can you supply weld neck flanges for geothermal steam service in the philippines?: yes. we regularly supply flanges for philippine geothermal applications. astm a182 f316 or f321 stainless steel is recommended for geothermal steam systems due to resistance against hydrogen sulfide and carbon dioxide present in geothermal fluids. for high-temperature wellhead service, alloy steel grades such as f22 and f91 with nace mr0175 compliance are available.
q4: do you offer third-party inspection for philippine shipments?: yes. third-party inspection by ilac/iaf-accredited agencies including tuv rheinland, dnv, lloyd’s register, bureau veritas, sgs, and intertek can be arranged. inspection hold points can be integrated into the manufacturing plan, typically adding 2 to 5 working days to the production schedule.
q5: can werner flanges supply flanges for lng cryogenic service at philippine import terminals?: yes. for lng cryogenic service, we supply weld neck flanges in astm a350 lf2 carbon steel and astm a182 f304l or f316l stainless steel suitable for low-temperature operation. all lng-grade flanges include charpy v-notch impact testing at specified minimum design temperatures along with complete heat treatment documentation.
q6: what are your minimum order quantities for philippine customers?: we accept orders ranging from single replacement flanges to large multi-piece project quantities. standard carbon steel sizes may be dispatched quickly from stock inventory, while larger sizes or alloy materials typically follow a minimum quantity of five pieces per size, class, and material combination.
q7: are your weld neck flanges suitable for sour service in philippine oil and gas applications?: yes. weld neck flanges supplied for sour service comply with nace mr0175 and iso 15156 requirements. hardness is controlled within specification limits, supported by heat treatment records, pmi verification, and nace compliance certification included with shipment documentation.
q8: can i receive a sample material test certificate before placing a purchase order?: yes. typical material test certificates from previous production batches can be shared for technical evaluation, allowing philippine procurement and quality teams to pre-qualify products before issuing a purchase order.