Leading Manufacturer & Exporter of
Weld Neck Flanges to Malaysia
Werner Flanges is a premier weld neck flanges exporter to Malaysia, serving the nation's rapidly growing oil and gas, petrochemical, and manufacturing sectors since 1989. As an ISO 9001:2015 certified manufacturer, we supply high-performance weld neck flanges (WN flanges) to major industrial hubs including Kuala Lumpur, Johor Bahru, Penang, Kuantan, and Kertih. Our comprehensive range includes ASME B16.5 weld neck flanges manufactured from carbon steel, stainless steel, alloy steel, and duplex materials in pressure classes from 150# to 2500# and sizes ranging from 1/2" to 60".
Malaysia’s strategic position as Southeast Asia’s industrial powerhouse demands piping components that can withstand high pressures, extreme temperatures, and corrosive environments. Our weld neck flanges are engineered specifically for critical applications in PETRONAS facilities, petrochemical complexes in Gebeng and Pasir Gudang, power generation plants, and offshore platforms in the South China Sea. With full material traceability, third-party testing certifications, and compliance with international standards including ASME, ASTM, API, and MS (Malaysian Standards), we ensure every weld neck flange meets the stringent requirements of Malaysian industries.
We understand the unique challenges facing Malaysian industrial projects—from the high humidity and corrosive marine environments along coastal areas to the demanding specifications of PETRONAS and other major operators. Our weld neck flanges offer superior strength through their tapered hub design, providing excellent stress distribution for high-pressure and high-temperature applications. Whether you’re working on upstream oil and gas projects in Terengganu, refinery expansions in Port Dickson, or LNG facilities in Bintulu, Werner Flanges delivers reliable, certified products with competitive pricing and fast delivery times of 18-25 days to major Malaysian ports including Port Klang, Johor Port, and Penang Port.
Our technical team provides comprehensive support for material selection, pressure class determination, and custom manufacturing requirements. We supply complete documentation packages including Material Test Certificates (MTC 3.1/3.2), PMI test reports, dimensional inspection certificates, and heat treatment charts—essential for project approvals and compliance with Malaysian regulatory requirements.
Technical Flange Support | MTC 3.1/3.2 & PMI Reports | Inspection Certificates | Malaysian Regulatory Compliance
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
| Weld Neck Flanges | Raised Face Weld Neck Flanges | Flat Face Weld Neck Flanges | RTJ Weld Neck Flanges | Long Weld Neck Flanges |
| High Pressure Weld Neck Flanges | Forged Weld Neck Flanges | Reducing Weld Neck Flanges | Industrial Weld Neck Flanges | Custom Weld Neck Flanges |
Industries and Applications We Supply
| Industry | Applications |
|---|---|
Oil & Gas Industry |
Malaysia’s oil and gas sector, dominated by PETRONAS and international operators, represents our largest application segment for weld neck flanges. Upstream Applications: PETRONAS Carigali operates numerous offshore platforms in the South China Sea, Sarawak Basin, and Sabah region, where our weld neck flanges serve in:
Specific Projects: PM3 CAA Development (offshore Terengggu), Kebabangan field (Sabah), SK408 platforms (Sarawak waters) Midstream Applications: PETRONAS Gas Berhad operates extensive pipeline networks requiring thousands of weld neck flanges:
Downstream Applications: PETRONAS operates major refineries in Port Dickson, Melaka, and Kertih, plus the massive RAPID complex in Pengerang:
RAPID Pengerang Refinery: This integrated refinery and petrochemical complex uses thousands of specialized weld neck flanges including F91 for supercritical applications, super duplex for marine service, and full range of pressure classes from 150# to 1500# . |
Petrochemical Plants: |
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| Power Generation |
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Malaysia’s water treatment infrastructure serves 32 million people with increasing desalination capacity for water-stressed regions. Desalination Plants: Kenyir Dam Water Treatment (Terengganu):
Municipal Water Treatment (Air Selangor, Pengurusan Air Pahang, SAJ Holdings):
Wastewater Treatment (Indah Water Konsortium):
Effluent Discharge: Duplex stainless steel for treated water discharge to rivers/sea |
Frequently Asked Questions (FAQs)
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Do your weld neck flanges comply with PETRONAS technical standards?
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Werner Flanges manufactures weld neck flanges in full compliance with ASME B16.5, which forms the basis for PETRONAS Technical Standards (PTS). Our quality management system, material traceability, and testing procedures align with PETRONAS requirements. Complete documentation packages include Material Test Certificates (EN 10204 Type 3.1/3.2), PMI reports, dimensional inspection certificates, and NDT documentation required for PETRONAS project approvals.
For projects requiring specific PTS compliance, we work closely with engineering teams to ensure all specifications are met. Third-party inspection by TÜV, DNV, Lloyd’s Register, or Bureau Veritas can be arranged if required by PETRONAS or project specifications.
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What are the typical delivery times for weld neck flanges to Malaysia?
- Standard sea freight delivery takes 18-25 days from order confirmation to Malaysian ports. This includes manufacturing time for standard specifications and transit time to major ports such as Port Klang, Johor, Penang, Kuantan, and Bintulu. Expedited air freight is available for urgent requirements, typically 3-5 days to Kuala Lumpur International Airport.
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Can you supply weld neck flanges with NACE MR0175 certification for sour gas service?
- Werner Flanges supplies NACE MR0175 / ISO 15156 compliant weld neck flanges for Malaysian oil and gas applications involving H₂S. Materials are selected from NACE-approved grades (A105, A350 LF2, 316L, Duplex, F22, etc.), with controlled hardness, heat treatment, and testing including impact, hardness, and sulfide stress cracking resistance. Documentation includes NACE compliance certificates.
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What materials do you recommend for offshore applications in the South China Sea?
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For Malaysian offshore platforms in the South China Sea, recommended materials include:
Seawater service:
- Super Duplex (F53/F55): excellent chloride resistance, higher strength than 316L
- Duplex (F51): suitable for moderate chloride environments
- 316L Stainless Steel: minimum grade for seawater exposure
Hydrocarbon production lines:
- Carbon Steel (A105) with coating for sweet service
- F22 Alloy Steel for high-temperature fluids
- 316L/Duplex for wet gas with chlorides
- NACE-compliant materials for sour service (H₂S present)
Structural/utility systems:
- Hot-dip Galvanized A105 for structural piping
- 304L Stainless Steel for atmospheric corrosion resistance
Material recommendations are based on operating parameters including temperature, pressure, fluid composition, and environmental exposure.
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Do you offer third-party inspection, and which agencies do you work with?
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Third-party inspection can be arranged at any stage of manufacturing. Major inspection agencies for Malaysian projects include TÜV Süd, DNV GL, Lloyd’s Register, Bureau Veritas, SGS, Intertek, and RINA.
Inspection services include source inspection at the manufacturing facility, witness testing (tensile, impact, hardness, NDT), raw material verification, dimensional inspection, heat treatment witnessing, pre-shipment inspection, and documentation review.
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Can you manufacture custom or non-standard weld neck flanges?
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Beyond standard ASME B16.5 flanges, Werner Flanges manufactures custom weld neck flanges for Malaysian applications:
- Non-standard sizes, intermediate dimensions, or sizes above 60″
- Special pressure ratings beyond standard classes
- Modified hub lengths for thick insulation or space constraints
- Exotic alloys (Inconel, Monel, Hastelloy, Titanium) for specialized chemical service
- Special facings including custom groove dimensions or proprietary sealing systems
- Reducing weld necks for any inlet/outlet combination
- Compact designs for space-limited offshore applications
Engineering support includes stress analysis, material selection guidance, and compliance verification for custom designs.
