Leading Manufacturer & Exporter of
Weld Neck Flanges to Indonesia
Werner Flanges is a globally recognized manufacturer and exporter of precision-engineered weld neck flanges, proudly serving Indonesia's most demanding industrial sectors. With decades of manufacturing experience and a commitment to international quality standards, we supply high-performance weld neck flanges to Pertamina, ExxonMobil, Chevron Pacific Indonesia, and major petrochemical complexes across Jakarta, Surabaya, Balikpapan, Batam, Medan, Semarang, and Cilegon.
Indonesia’s rapidly expanding oil & gas, petrochemical, and power generation sectors demand piping components that can withstand extreme pressure, high temperatures, and corrosive environments. Our weld neck flanges are manufactured to ASME B16.5 and ASME B16.47 standards, available in all pressure classes from 150# to 2500# and sizes ranging from ½” to 60″. Every flange is forged, heat-treated, precision-machined, and rigorously tested before it leaves our facility — ensuring zero failures in the field.
Whether you’re specifying flanges for a Pertamina refinery expansion in Balikpapan, an offshore platform in East Kalimantan, a Chandra Asri petrochemical complex in Cilegon, or a power generation project on Java, Werner Flanges delivers the right material grade, the right certifications, and the right documentation — on time, every time.
We export directly from India to Indonesia via Tanjung Priok (Jakarta), Tanjung Perak (Surabaya), Tanjung Emas (Semarang), and Belawan (Medan) ports, with typical sea freight transit times of 10–15 days. Air freight options are available for urgent orders.
India to Indonesia Flange Export | 10–15 Days Sea Freight | Tanjung Priok, Perak, Emas & Belawan Ports | Air Freight Available
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 |
Indonesia’s oil and gas sector — led by Pertamina, Chevron Pacific Indonesia, ExxonMobil Cepu, ConocoPhillips, and MedcoEnergi — is the single largest consumer of weld neck flanges in the country. Upstream applications include wellhead connections, production manifolds, offshore platform flowlines, and onshore gathering systems across Sumatra, Kalimantan, and Java. Midstream applications cover PGN’s high-pressure gas transmission pipelines and crude oil trunk lines. The Sisi Nubi AOI Project in East Kalimantan (USD 180 million offshore platform, 2024) and the Jadestone Energy Akatara Gas Project offshore East Java (USD 130 million, inaugurated April 2025) are representative large-scale infrastructure projects. Downstream applications at Pertamina’s refineries in Cilacap, Balongan, Dumai, and Balikpapan require weld neck flanges across all process units — distillation, hydrotreating, catalytic reforming, and product pipelines. Offshore in the Natuna Sea and deepwater Makassar Strait, super duplex and nickel alloy weld neck flanges are specified for combined H₂S, CO₂, and seawater service. |
Power Generation
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Petrochemical Processing |
Indonesia’s growing petrochemical sector — anchored by Chandra Asri’s Cilegon complex, the Lotte Chemical Indonesia New Ethylene (LINE) project, and the PT Trans Pacific Petrochemical Indotama Tuban polypropylene plant — creates strong demand for stainless steel, duplex, and alloy steel weld neck flanges in Class 600 to 2500 ratings. Reactor nozzles, heat exchanger channel covers, distillation column nozzles, and compressor connections in these facilities all require NACE-compliant, fully documented flange packages. |
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Municipal water treatment plants in Greater Jakarta, desalination facilities, and industrial wastewater systems in the Batam Free Trade Zone require weld neck flanges in carbon steel and stainless steel for pump connections, filter housings, chemical dosing systems, and distribution manifolds. |
Frequently Asked Questions (FAQs)
- 1. can you supply nace mr0175 compliant weld neck flanges for sour service in indonesia’s oil fields?
- yes. we routinely supply nace mr0175 / iso 15156 compliant flanges with controlled hardness limits (≤22 hrc), heat treatment verification, per-piece hardness testing, and full nace compliance documentation as standard.
- 2. how long does delivery to jakarta take?
- standard grades are ready within 4–6 weeks from order confirmation, in-stock items in 7–10 days. sea freight to tanjung priok takes 10–12 days; air freight to soekarno-hatta in 3–5 days.
- 3. do you offer third-party inspection by tuv, dnv, or bv for pertamina-approved projects?
- yes. we are approved by tuv rheinland, dnv gl, bureau veritas, lloyd’s register, sgs, and intertek. inspectors can witness manufacturing, testing, and final inspection at any stage.
- 4. can you supply api 6a weld neck flanges for wellhead applications?
- yes. we manufacture per api 6a in material classes aa through hh, for wellhead christmas trees, casing head flanges, and tubing head flanges used by pertamina, chevron pacific indonesia, exxonmobil cepu, and conocophillips indonesia.
- 5. can you supply a complete flange package for an entire piping system?
- yes. we manufacture all seven flange types (weld neck, slip-on, blind, socket weld, threaded, lap joint, orifice) across all pressure classes, materials, and sizes — complete packages from a single source.
- 6. are your flanges suitable for chandra asri or lotte chemical plants?
- yes. we understand the material requirements (high-chrome alloys, stainless, duplex) and documentation standards (en 10204 3.1, nace, pmi) for petrochemical complexes. our engineering team reviews project specifications before order placement.
