Leading Flange Manufacturer & Exporter to Thailand
Werner Flanges is a trusted flange manufacturer and exporter serving Thailand's rapidly expanding industrial sector, delivering precision-engineered flanges to the Kingdom's oil and gas refineries, petrochemical complexes, power generation facilities, and infrastructure projects. With over two decades of manufacturing excellence, we supply flanges across Thailand's major industrial hubs — Bangkok, Map Ta Phut Industrial Estate, Rayong, Chonburi, Laem Chabang, Sriracha, and Chiang Mai — supporting critical energy, chemical, and infrastructure projects that underpin Thailand's economic development.
Thailand’s industrial heartland, anchored by the Eastern Economic Corridor (EEC) — the government’s flagship investment zone encompassing Rayong, Chonburi, and Chachoengsao provinces — is one of Southeast Asia’s most dynamic manufacturing and processing regions. Map Ta Phut Industrial Estate alone hosts over 140 industrial plants operated by world-class companies including PTT, IRPC, PTTGC (PTT Global Chemical), Indorama Ventures, and SCG Chemicals, collectively consuming vast quantities of flanges and piping components for ongoing operations, turnaround maintenance, and capacity expansion.
Our flanges are manufactured to ASME B16.5, ASME B16.47, MSS SP-44, and API 6A standards, covering pressure classes 150# through 2500# in sizes from 1/2″ to 60″ NPS. Material options include carbon steel (ASTM A105, A350 LF2), stainless steel (ASTM A182 F304, F316, F316L, F321), alloy steel (ASTM A182 F5, F9, F11, F22), and duplex/super duplex grades (F51, F53, F55) for corrosive and high-temperature service. Every flange undergoes rigorous quality inspection including dimensional verification, mechanical testing, PMI, and non-destructive examination, with comprehensive documentation packages satisfying Thai customs requirements and international project standards.
As a direct manufacturer supplying Thailand without intermediary traders, Werner Flanges delivers pricing 15–25% more competitive than distribution channel pricing while maintaining uncompromising quality. Sea freight from our manufacturing facility reaches Laem Chabang Port — Thailand's principal deep-water container port handling over 8 million TEUs annually — in 18–22 days, with air freight options available for urgent requirements at Bangkok's Suvarnabhumi Airport. Whether your project demands flanges for PTT's upstream gas operations in the Gulf of Thailand, PTTGC's olefins complex at Map Ta Phut, EGAT's power generation stations, or EEC infrastructure development, Werner Flanges delivers the reliability, specification compliance, and supply chain efficiency Thailand's industries require.
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 Supplier | 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 in Thailand |
|---|---|
Oil & Gas Industry |
Thailand’s offshore oil and gas production in the Gulf of Thailand generates continuous demand for weld neck flanges across upstream and midstream infrastructure. Major offshore platforms and gas fields require high-integrity flange connections designed for reliable performance in marine environments.
Upstream Applications: Weld neck flanges are used in wellhead christmas trees, production manifolds, separator systems, flowlines, and high-pressure injection piping. RTJ facing and NACE MR0175 compliant materials are specified for sour gas handling and high-pressure offshore service conditions. Midstream Gas Transmission: Thailand’s offshore-to-onshore gas pipeline network utilizes weld neck flanges at subsea tie-ins, compressor stations, pig launcher and receiver systems, pressure regulation stations, and onshore reception terminals supplying the national gas grid and power sector. LNG Infrastructure: LNG receiving terminals require cryogenic weld neck flanges for unloading arms, vaporization systems, storage tank nozzles, and send-out pipelines. Low-temperature materials such as ASTM A350 LF2 and stainless steel grades are used to meet cryogenic operating requirements. |
Power Generation |
Gas-fired combined cycle power plants across Thailand rely heavily on weld neck flanges for high-temperature and high-pressure piping systems supporting reliable electricity generation.
Gas-Fired Power Plants: Applications include fuel gas supply systems, HRSG piping, boiler drum connections, turbine bypass lines, condensate systems, and superheater/reheater piping using alloy steel grades such as F22 and F91. Renewable & Biomass Facilities: Biomass and biogas plants utilize stainless steel weld neck flanges in corrosive feedstock handling, steam systems, and utility piping networks supporting Thailand’s expanding renewable energy sector. |
Petrochemical & Refining |
Thailand’s petrochemical and refining industry, centered around major industrial estates, requires corrosion-resistant weld neck flanges for continuous processing operations.
Petrochemical Processing: Weld neck flanges are widely used in ethylene cracker piping, aromatics production units, refrigeration trains, chemical feed systems, and high-pressure steam headers utilizing alloy steel and stainless steel materials. Refinery Applications: Refineries employ weld neck flanges in crude distillation units, hydroprocessing systems, cooling water networks, and utility piping where leak-tight performance and thermal stability are critical. Specialty Chemical Production: Advanced chemical facilities increasingly specify duplex, super duplex, and high-alloy materials for corrosive processing environments within Thailand’s expanding industrial corridor. |
Water & Industrial Utilities |
Industrial estates and large manufacturing zones across Thailand depend on reliable water and utility infrastructure supported by weld neck flange connections.
Water Treatment & Desalination: Stainless steel weld neck flanges are used in seawater intake pipelines, reverse osmosis systems, cooling water circuits, and brine discharge lines operating in corrosive environments. Industrial Utility Systems: Applications include compressed air systems, cooling networks, process water lines, and plant utility piping supporting automotive manufacturing and advanced industrial facilities. |
Frequently Asked Questions (FAQs)
- Q1: Do your weld neck flanges meet PTTEP offshore project specifications?
- yes. we are familiar with pttep’s offshore technical requirements and standard purchase order documentation expectations. our flanges are supplied with normalized heat treatment, full dimensional inspection, and nace mr0175 compliance where specified. customers are encouraged to share their material requisition (mr) for confirmation before ordering.
- Q2: Can you supply NACE MR0175 compliant weld neck flanges for sour gas service in the Gulf of Thailand?
- absolutely. nace mr0175 / iso 15156 sour service compliance is one of our core capabilities. this requires controlled chemistry, heat treatment to achieve hardness ≤22 hrc (248 bhn), full hardness testing on each flange, and compliance certificates. we routinely supply nace-compliant flanges for h₂s-bearing gas wells and gas processing applications.
- Q3: What is the minimum order quantity (MOQ) for weld neck flanges to Thailand?
- we do not impose a formal moq. small quantities from a single piece upward are accommodated, though small orders may incur a minimum order surcharge. project-scale orders (typically 50+ pieces) receive best pricing and can be scheduled to align with your project or turnaround timeline.
- Q4: Can you supply both ASME B16.5 and ASME B16.47 weld neck flanges for large bore Thai pipeline projects?
- yes. we manufacture weld neck flanges per asme b16.5 (½”–24″) and per asme b16.47 series a (mss sp-44) and series b (api 605) (26″–60″) for large bore applications in thailand’s pipeline, refinery, and petrochemical projects including map ta phut plant expansions.
- Q5: How do you handle expedited orders for critical path items on Thailand projects?
- for urgent requirements, we offer accelerated production with priority scheduling (reducing standard lead time by ~30–40%) and air freight to suvarnabhumi international airport delivering in 4–6 days. notifying us of criticality at the rfq stage ensures stock availability and realistic expediting options.
- Q6: What third-party inspection bodies do you work with for Thailand exports?
- we work with all major tpi bodies recognized by thai operators and epcs: bureau veritas, dnv, lloyd’s register, tüv rheinland, sgs, and intertek. we coordinate logistics including witness/hold point scheduling, inspector access, and certificate issuance, so customers do not need to manage this from thailand.
- Q7: Can you supply cryogenic weld neck flanges for PTT LNG’s Map Ta Phut terminal?
- yes. we supply astm a350 lf2 class 1 cryogenic carbon steel weld neck flanges with full charpy impact testing, as well as astm a182 f304l and f316l stainless steel flanges for lng service piping. all cryogenic grade flanges are supplied with full heat treatment records and impact test certificates.
- Q8: Do your stainless steel weld neck flanges come with passivation treatment?
- yes. all austenitic stainless steel and nickel alloy weld neck flanges are passivated per astm a967 after final machining. passivation certificates are provided in the documentation package, important for thailand’s coastal industrial environment where chloride-induced corrosion is a concern.
