FLANGES – KOFCO
FLANGES - KOFCO
- Material: Forged Carbon Steel – Stainless Steel
- Class: 150-300 – PN 16, PN 25
- Size range: 1/2″ to 24″ (above on demand)
- Types: Welding Neck, Threaded, Slip-on, Blind
- Standards: ANSI AWWA API & MSS
- Origin: China
KOFCO Flanges Supplier in Saudi Arabia
Flange Types We Stock
Pressure Classes & Facings
Ajal Arabia supplies KOFCO flanges across Saudi Arabia for piping systems that need reliable, code-compliant bolted joints. Our range covers weld neck, slip-on, blind, socket weld, threaded, and lap joint flanges in carbon steel ASTM A105, low-temperature ASTM A350 LF2, and stainless steel ASTM A182 F304/F316 — in ASME Class 150 through 2500 and PN10 to PN40, sizes 1/2″ to 24″ to ASME B16.5. From pump-room tie-ins and fire fighting headers to high-pressure process lines serving Jubail and Yanbu plants, the flange is where your system’s pressure integrity is proven — so correct type, class, facing, and material matter. We help procurement teams and engineers match the flange to the service conditions and the mating gasket, and every supply can be backed by mill test certificates to EN 10204 3.1. For KOFCO flanges in Saudi Arabia — single pieces or full project packages — request a quotation.
Related: spiral wound and RTJ gaskets to match | seamless pipe for high-pressure lines | request a flange quotation
Applications
- Oil, gas and petrochemical process piping tie-ins
- Fire fighting pump rooms, headers and riser joints
- HVAC chilled water plant rooms and equipment connections
- Water transmission and pumping stations
- Chemical and industrial plants (stainless steel flanges)
- High-pressure steam systems (Class 600 and above)
Standards & Specifications
- ASME B16.5 — pipe flanges and flanged fittings, 1/2″ to 24″
- ASME B16.47 — large-diameter steel flanges
- ASTM A105 — carbon steel forgings for piping components
- ASTM A350 LF2 — low-temperature carbon steel forgings
- ASTM A182 F304 / F316 — stainless steel forgings
- Pressure classes 150 / 300 / 600 / 900 / 1500 / 2500; PN10 / PN16 / PN25 / PN40
- Facings: raised face (RF), flat face (FF), ring-type joint (RTJ)
- Types: weld neck (WN), slip-on (SO), blind (BL), socket weld (SW), threaded, lap joint
- Mill test certificates to EN 10204 3.1 available
Frequently Asked Questions
Q1: Weld neck vs. slip-on flange — when should I use each?
A: Weld neck flanges suit high pressure, high temperature, and cyclic services because the tapered hub distributes stress into the pipe. Slip-on flanges are more economical and easier to align, making them the standard choice for low-to-medium pressure utility, HVAC, and water systems. For anything above Class 300 or in critical service, default to weld neck.
Q2: What does flange Class 150 vs. Class 300 mean?
A: The class is the ASME pressure–temperature rating: Class 300 handles roughly twice the pressure of Class 150 at a given temperature. Classes are not interchangeable — bolting patterns and flange thicknesses differ, so match the class to your piping specification and the mating equipment flanges.
Q3: What is the difference between raised face, flat face, and RTJ facings?
A: Raised face is the most common, concentrating bolt load on the gasket for a reliable seal. Flat face is used with cast iron equipment and low-pressure systems. RTJ (ring-type joint) uses a metal ring in a machined groove for high-pressure, high-temperature sealing in oil & gas service.
Q4: Do your flanges come with mill test certificates?
A: Yes. KOFCO flanges are supplied with mill test certificates to EN 10204 3.1, traceable by heat number — the documentation consultants and QA/QC teams require for Saudi project submittals.