Factory-direct forged steel pipe flanges manufactured to ASME, EN, DIN, and JIS specifications, engineered specifically to handle the high thermal expansion and humid tropical operating conditions of Greater Jakarta.
As the economic center of Indonesia and the backbone of the Special Capital Region of Jakarta (DKI Jakarta) alongside the broader Jabodetabek industrial corridor, the demand for resilient, cost-effective, and fully certified forging solutions has surged. Modernizing regional logistics hubs, expanding energy terminals, and upgrading civic infrastructure demand high-performance piping components.
The industrial zones across Cikarang, Karawang, Bekasi, and Tangerang house massive automotive plants, food processing plants, and petrochemical manufacturing plants. Slip-On flanges are widely adopted here due to their speed of installation during maintenance turnarounds and lower overall material costs compared to long weld neck designs.
With Port of Tanjung Priok expanding its container terminals and liquid bulk handling stations, piping components must endure aggressive coastal salt-air corrosion and brackish water environments. Hot-dip galvanized and high-nickel alloy Slip-On flanges provide essential longevity against pitting and chloride stress corrosion cracking.
Power plants in Tanjung Priok and Muara Karang, alongside regional gas pipelines operated by PERTAMINA and local EPCs, require rigorous ASME B16.5 compliance. Slip-On flanges with double fillet welds are routinely specified for mid-pressure fuel gas feedlines and cooling water distribution systems.
A Slip-On flange is designed to slide over the outer diameter of the pipe, positioning the pipe end inside the flange hub by approximately 1/16” (1.6 mm) to allow dual fillet welding. Understanding its engineering advantages helps procurement leads optimize capital expenditure without compromising safety.
| Feature | Slip-On (SO) | Weld Neck (WN) | Socket Weld (SW) |
|---|---|---|---|
| Initial Cost | Low / Economical | High | Moderate |
| Welding Type | Double Fillet Weld | Butt Weld | Single Fillet Weld |
| Stress Concentration | Moderate at Hub | Low (Smooth Hub) | High at Root |
| Pipe End Prep | Square Cut (No Bevel) | Beveled Edge Required | Square Cut |
| Jakarta Ideal Use | HVAC, Water, Class 150/300 | High Temp Oil/Gas | Small Bore High Press. |
Located in Dingxiang County, Shanxi Province—globally recognized as the "Hometown of Forging"—our manufacturing complex bridges world-class forging technology with direct ocean freight lines servicing Southeast Asian maritime routes.
From billet cutting, ring rolling, and drop-hammer forging to heat treatment and CNC precision machining, every step occurs inside one facility. Heat numbers are stamped directly onto each flange body, ensuring 100% material heat-traceability verified by EN 10204 3.1 Mill Test Certificates.
Our quality management systems are certified to ISO 9001:2015 and PED 2014/68/EU by TÜV CERT. Every batch destined for Jakarta undergoes Ultrasonic Testing (UT), Magnetic Particle Inspection (MT), Spectrometric Chemical Verification, and Hydrostatic testing where specified.
With direct sea shipping routes from Tianjin and Qingdao ports straight to Jakarta’s Tanjung Priok Port, transit times are maintained within 15 to 20 calendar days. We supply export-grade fumigation-free plywood crates, heavy rust-inhibitor varnish, and end-cap protections.
Indonesia’s national focus on green transition, high-density commercial real estate, and digital infrastructure demands modernized piping specifications capable of long lifecycle performance.
Comprehensive dimensions, pressure ratings, and material selections engineered to comply with Indonesian SKK Migas tender requirements and international EPC standards.
| Dimensional Standard | Nominal Size Range | Pressure Rating / Class | Common Material Specifications | Facing Types |
|---|---|---|---|---|
| ASME B16.5 | 1/2" to 24" (DN15 - DN600) | Class 150, 300, 600, 900, 1500 | ASTM A105, A350 LF2, A182 F304/F304L, F316/F316L | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
| ASME B16.47 Series A / B | 26" to 60" (DN650 - DN1500) | Class 75, 150, 300, 600 | Carbon Steel A105, High-Yield A694 F52/F60/F65 | Raised Face (RF), Flat Face (FF) |
| EN 1092-1 (Type 12 Hubbed SO) | DN15 to DN1200 | PN6, PN10, PN16, PN25, PN40, PN63 | P245GH, P250GH, P280GH, 1.4301, 1.4404, 1.4462 (Duplex) | Type A (Flat), Type B1/B2 (Raised Face) |
| JIS B2220 | 15A to 1000A | 5K, 10K, 16K, 20K, 30K | SS400, SF440A, SUS304, SUS316 | FF (Flat Face), RF (Raised Face) |
| DIN Standards (DIN 2576 / 2502) | DN10 to DN2000 | PN6 to PN40 | RSt37-2, C22.8, 1.4307, 1.4404 | Form C / Form D Serrated Finish |
Explore our expanded catalog of standard, custom-machined, and non-standard forged flanges engineered to exact project requirements.
Expert answers regarding standards compliance, Indonesian customs clearance, material selection, and quality testing for engineering managers and procurement desks.
Get direct factory pricing, technical drawing reviews, and complete EN 10204 3.1 material certificates within 24 hours from our senior forging engineers.
