Carbon Steel Flanges Supplier to Indonesia

Leading Manufacturer & Exporter of
Carbon Steel Flanges to Indonesia

Werner Flanges stands as Indonesia's trusted partner for premium carbon steel flanges, delivering superior quality products to industries across Jakarta, Surabaya, Balikpapan, Batam, and Cilegon since 2008. As a prominent carbon steel flanges distributor in Indonesia, we specialize in manufacturing and supplying a comprehensive range of ASTM A105, A350 LF2, and A694 carbon steel flanges that meet the rigorous demands of Indonesia's thriving oil & gas, petrochemical, and power generation sectors.

Our carbon steel flanges are engineered to ASME B16.5, ASME B16.47, and MSS SP-44 standards, ensuring compatibility with Indonesia’s diverse industrial infrastructure. From the oil refineries in Balikpapan and Balongan to the petrochemical complexes in Merak and Gresik, our products serve critical applications where reliability and performance are non-negotiable.

Indonesia’s position as Southeast Asia’s largest economy and a major player in oil & gas production demands flange solutions that can withstand challenging operational conditions. Our carbon steel flanges are specifically selected and manufactured to handle high-pressure applications up to 2500# class, temperature ranges from -29°C to 538°C, and the corrosive environments typical of offshore platforms and coastal refineries throughout the Indonesian archipelago.

With manufacturing capabilities spanning forged flanges in sizes from ½” to 60″ and pressure classes from 150# to 2500#, Werner Flanges maintains strategic inventory positions to ensure rapid delivery across Indonesia’s major industrial hubs. Our direct manufacturing approach eliminates intermediaries, providing Indonesian buyers with competitive pricing without compromising on quality or certification requirements.

Every carbon steel flange supplied to Indonesia comes with complete material traceability, including Material Test Certificates (MTC) per EN 10204 3.1/3.2, dimensional inspection reports, and heat treatment charts. We understand the stringent documentation requirements of Indonesian customs and major operators like Pertamina, Medco Energi, and Indonesia Power, ensuring seamless project execution.

Whether you're sourcing flanges for upstream oil & gas projects in Kalimantan, downstream refinery expansions in Java, or power plant installations in Sumatra, Werner Flanges delivers the quality, reliability, and technical support that Indonesia's industrial sector demands.

Indonesia Carbon Steel Flanges | EN 10204 3.1/3.2 MTC | Pertamina & Power Project Supply | Full Traceability & Technical Support

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	Plate Flanges

Industries and Applications We Supply

Industry	Applications
Oil & Gas Industry	Indonesia’s position as Southeast Asia’s significant oil & gas producer creates substantial demand for reliable carbon steel flanges: Upstream Applications: Offshore Production Platforms: Carbon steel flanges in Class 600# and 900# connect wellhead equipment, manifolds, and production risers on platforms in the Natuna Sea, Makassar Strait, and Java Sea. Platforms operated by Total E&P Indonesia, Pertamina Hulu Energi, and ConocoPhillips Indonesia depend on ASTM A105 flanges for high-pressure service. Onshore Oil Fields: Mature oil fields in South Sumatra (Jambi, Palembang region), East Kalimantan (Balikpapan, Tarakan), and Central Java (Cepu Block) use carbon steel flanges in gathering systems, flow lines, and wellhead connections. Class 300# and 600# flanges dominate these applications. Gas Processing Facilities: Natural gas processing plants in South Sumatra, Kalimantan, and Papua require carbon steel flanges for separation units, dehydration systems, and compression facilities. Indonesia’s significant gas reserves support LNG exports to Japan, South Korea, and China. Midstream Applications: Oil Pipelines: Long-distance crude oil pipelines transporting production from South Sumatra fields to Plaju and Sungai Gerong refineries use ASTM A694 F60/F65 high-strength carbon steel flanges for pump stations and valve manifolds. Gas Transmission Networks: Natural gas pipelines connecting fields in Kalimantan to distribution networks in Java and Sumatra employ carbon steel flanges at compressor stations, pressure regulation facilities, and metering stations. Downstream Refining Applications: Pertamina Refineries: Indonesia’s national oil company operates major refineries in Cilacap (Central Java), Balikpapan (East Kalimantan), Dumai (Riau), Balongan (West Java), Plaju (South Sumatra), and Sorong (West Papua). These facilities consume thousands of carbon steel flanges annually for: Crude oil distillation units processing Indonesian crude grades Catalytic cracking units converting heavy fractions to lighter products Hydrotreating units removing sulfur from diesel and gasoline Reforming units producing high-octane gasoline components Product blending and storage tank connections Private Refineries: Chevron’s facilities and other private refineries in Indonesia use carbon steel flanges for similar applications, with pressure classes ranging from 150# (product lines) to 900# (high-pressure hydrogen service).
Power Generation	Indonesia’s growing electricity demand drives coal-fired, gas-fired, and geothermal power plant construction:Coal-Fired Power Plants: Major facilities like Paiton Power Station (East Java), Suralaya Power Station (Banten), and Paiton Energy (East Java) use carbon steel flanges extensively: High-Pressure Steam Lines: Class 600# and 900# weld neck flanges for superheater outlets and turbine connections operating at 160-180 bar and 540-565°C Boiler Feed Water Systems: Class 300# flanges for high-pressure pump discharge and economizer connections Condensate Return Systems: Class 150# slip-on and weld neck flanges for low-pressure condensate piping Ash Handling Systems: Abrasion-resistant carbon steel flanges for slurry transport Gas-Fired Combined Cycle Plants: Heat recovery steam generators (HRSG) use carbon steel flanges in steam generation sections Gas turbine auxiliary systems employ Class 300# flanges for fuel gas, lube oil, and cooling water Geothermal Power Plants: Indonesia’s significant geothermal resources (Kamojang, Salak, Wayang Windu in West Java; Lahendong in North Sulawesi) use carbon steel flanges in: Steam gathering systems from production wells (Class 300#) Steam separation equipment connections Brine reinjection system piping Diesel Generator Sets: Backup power systems in industrial facilities and remote locations use carbon steel flanges for fuel supply, cooling water, and exhaust systems.
Petrochemical Processing	Indonesia’s growing petrochemical sector in Merak-Cilegon (Banten), Gresik (East Java), and Plaju (South Sumatra) relies heavily on carbon steel flanges: Petrochemical Complexes: PT Chandra Asri Petrochemical (Merak, Banten): Indonesia’s largest integrated petrochemical complex uses carbon steel flanges in olefins plants, polyethylene units, and styrene monomer production. ASTM A105 flanges in Class 150# to 600# handle process streams at temperatures up to 400°C. Petrokimia Gresik: Fertilizer production facilities use carbon steel flanges in ammonia synthesis units (Class 900# and 1500#), urea plants, and phosphate processing systems. PT Pupuk Kaltim (East Kalimantan): One of Asia’s largest fertilizer producers employs high-pressure carbon steel flanges in ammonia and urea production facilities operating at pressures exceeding 200 bar. Chemical Manufacturing: Caustic soda production facilities use carbon steel flanges for brine systems and evaporation units Chlor-alkali plants in Indonesia’s industrial estates require corrosion-resistant coated carbon steel flanges Specialty chemical manufacturers in Karawang and Bekasi industrial zones rely on carbon steel flanges for non-corrosive service
Water & Wastewater Treatment	Indonesia’s urban population growth drives water infrastructure development: Municipal Water Treatment: Jakarta’s water treatment plants (Pejompongan, Pulogadung) and facilities in Surabaya, Bandung, Semarang, and Medan use carbon steel flanges for: Raw water intake systems pumping from rivers and reservoirs Filtration unit piping and valve connections (Class 150#) Treated water distribution mains Chlorination and chemical dosing systems Wastewater Treatment Plants: Primary treatment settler connections Aeration basin blower discharge piping Sludge handling and dewatering systems Effluent discharge lines to rivers or sea outfalls Desalination Facilities: Coastal cities and industrial zones deploy seawater desalination plants using carbon steel flanges in: Seawater intake systems with protective coatings High-pressure pump connections (reverse osmosis plants) Brine disposal piping

Frequently Asked Questions (FAQs)

1. what standards do your carbon steel flanges comply with for indonesian projects?

carbon steel flanges are manufactured in compliance with asme b16.5 for sizes ½” to 24″ and asme b16.47 series a and b for larger diameters up to 60″. materials conform to astm a105 and astm a350 lf2 specifications commonly required in indonesian oil and gas, petrochemical, and power generation industries. dimensional tolerances follow mss sp-44 and marking requirements follow mss sp-25. each shipment includes en 10204 3.1 material test certificates verifying chemical composition and mechanical properties, supporting project approval and industrial compliance requirements in indonesia.

2. how long does delivery take to major indonesian cities?

typical sea freight delivery times from india to indonesia are:

jakarta (tanjung priok): 18–22 days
surabaya (tanjung perak): 19–23 days
balikpapan: 21–25 days
medan (belawan): 20–24 days
batam: 17–20 days

production lead time depends on size and specification, with stocked items shipping faster and custom dimensions requiring additional manufacturing time. inland delivery to industrial zones typically adds a few days depending on location.

3. can carbon steel flanges be supplied with protective coatings for indonesia’s coastal environment?

yes. protective coatings are available to improve corrosion resistance in indonesia’s humid and marine environments. options include:

black oxide coating for indoor service
zinc plating for moderate exposure
epoxy coating systems for coastal and refinery installations
hot-dip galvanizing for offshore and long-term outdoor applications

coating application includes proper surface preparation, thickness inspection, and quality verification before shipment.

4. do you provide material test certificates compliant with indonesian project requirements?

yes. shipments include en 10204 3.1 material test certificates documenting chemical composition, mechanical properties, heat treatment details, and traceability through heat numbers. when required for critical installations, en 10204 3.2 certification with independent inspection body verification can also be arranged. documentation supports acceptance for refinery, power plant, and industrial installations across indonesia.

5. are carbon steel flanges available for high-pressure applications in indonesian oil and gas fields?

yes. carbon steel flanges are manufactured in pressure classes ranging from class 150 up to class 2500 according to asme b16.5 standards. high-pressure applications commonly use normalized astm a105 material, weld neck flange design for improved stress distribution, and ring type joint facings for reliable sealing performance. additional testing such as ultrasonic examination and hardness verification can be performed to meet demanding upstream oil and gas operating conditions.